The International Association of Dento-Maxillo-Facial Radiology
Volume 22, Number 2
Winter 1996
Contents:
Around the World: Japan North America Taiwan United Kingdom
Miscellaneous:
New Odontologie Doctors in Malmo
News from the IADR Diagnostic Systems Group
Report of the 3rd Chinese National Congress
Successful South American Tour
Invitations for Scientific Meeting
Allan G. Farman, President of IADMFR
On behalf of the local arrangements committee, We invite you to attend and
participate in the 11th International Congress of the International Association of
Dento-Maxillo-Facial Radiology (IADMFR) in association with the 3rd International Congress
on Computed Maxillofacial Imaging (CMI) being convened June 21 -28, 1997 in Louisville,
Kentucky. Planning for the meeting began over three years ago and the time and efforts of
the various individuals in our committee promises to provide you with an experience not to
be missed.
This is the first time that the International Congress of the IADMFR and CMI
will be held conjointly Additionally it has been 10 years since IADMFR has met in the
United States while, it is the first time that CMI has met outside Europe. This fact, in
combination with the outstanding continuing education program and scientific session
planned, and the attractiveness and accessibility of the location, ensures that you will
enjoy IADMFR/CMI'97.
If you have questions, please feel free to contact anyone in the organizing
committee personally. We look forward to having you join us for this historic gathering in
the "Bluegrass" State.
Return
Around the World
The joint conference with the 173rd Kanto (East Japan) and the 15th Kita-Nihon
(North Japan) Districts of Japanese Society for Oral and Maxillofacial Radiology (JSOMR)
were held in Yokosuka city on July 6, 1996 chaired by Prof. Isamu Kashima of Kanagawa
Dental College. The special lecture entitled " Current status and future perspective
of digital image " by Mr.Hisatoyo Kato of Fuji X-ray Film Co.
The 37th general meeting of JSOMR was held 3 days from Wednesday, September 11
through Saturday, September 13, 1996 at Sapporo city, chaired by Prof. Masayuki Kaneko of
Health Sciences University of Hokkaido School of Dentistry. One hundred and one papers
were presented on variety of topics (Oral presentation: 72, Poster presentation: 29). The
keynote lecture: Calculation of radiation dose of patients in dental radiography by
Associate Prof.Akimune Hayami of Faculty of Dentistry, Osaka University. The special
lectures: " Problems of interstitial radiation and cancer treatment " by Dr.
Masamichi Nishio of Sapporo State Hospital. " A guide of statistics for dentists
" by Prof. Kazuya Sadakata of Health Sciences University of Hokkaido. During the
period of the meeting, some satellite meetings such as the 5th meeting of practical
applications of computer and the 10th meeting on radiation therapy were held.
The third Chinese National Congress of Oral Radiology was held at Grand Regency Hotel in Qingdao city on August 22 through 25, 1996 chaired by Professor Zhao-Ju Zou. Professor Xu-Chen MA worked as a secretary general of the congress. Ninety nine papers were presented including 7 educational lectures and 6 special lectures. The following Japanese colleagues were among the lecturers: Prof. Isamu Kashima, Prof. Eiichiro Ariji, Prof. Hirotsugu Yamamoto, Emeritus Prof. Yoshishige Fujiki, Prof. Shigenobu Kanda, Prof. Kanji Kishi, Prof. Mitsutake Kimura, Prof. Takenori Noikura and Prof. Shusaburo Uemura. Some other Japanese doctors also read their papers. Dr. Laetitia M. Brocklebank and Mr. Brocklebank from United Kingdom , Dr. T.K L. Li from Hong Kong, Dr. Yat-Hang Yan from Taiwan and Dr. Rong Chan-Yan from Canada were also among the participants. Broad range of topics were presented during these days of free scientific papers. Many doctors attended the congress from all over the China. I felt the power and the growth of Oral and Maxillofacial Radiology in China. Various programs such as welcome party, banquet (of course with famous Qingdao beer) and one day tour to Laoshan Mountain of magnificent scenery etc. attracted us and how we enjoyed them.
Kanji Kishi
Department of Oral Radiology,
Okayama University Dental School
We have recently completed the 47th Annual Session the American Academy of Oral
and Maxillofacial Radiology in San Diego, California from November 6 through the 10th
which was held conjointly with the Canadian Academy. The hotel chosen for the meeting had
old world charm where afternoon tea is served in the most sumptuous foyer. There were over
125 registered attendees; with 31 oral and 7 poster presentations. The Focus Groups have
become most popular and people feel that they learn much from these smaller groups. The
Canadian Academy presents something similar.
The new committee is, President - Richard Valochovic; President Elect - Lars
Hollender; Vice President - Douglas Benn. The rest of the committee is the same except for
the election of Ken Abromavitch as Councilor for Communications and Pete Benson, Councilor
for Education. At the Business lunch Dr. Allan Farman, the President of the 11th Congress
of the Intemational Association of Dento Maxillo Facial Radiology gave a slide
presentation showing Louisville where the next meeting will take place from June 21
through 28, 1997. Friday night the attendees experienced a most exotic, dinner evening on
a boat trip in San Diego harbor.
The American Academy is now a Recognized Provider by the American Dental
Association and also by the Academy of General Dentistry for the Continuing Education
Recognition Program. The Continuing Education lecture was given by Dr. Philip Sapp and the
topic was Histopathologic Correlation of Radiographic Lesions of the Oral and
Maxillofacial regions. The Cline Fixott Memorial Lecture was given by Dr. Isamu Kashima
from the Kanagawa Dental College in Japan and the topic was A New Approach to Diagnostic
Imaging of Bone Using Computed Tomography. At the business lunch we were informed that the
Academy's request for Specialty Recognition from the ADA was initially approved and then a
decision was deferred for a year.
The Canadian Academy of Oral and Maxillofacial Radiology held its first conjoint
meeting with the American Academy of Oral and Maxillofacial Radiology from November 6
through the 9th. As part of its Annual General Meeting the Canadian Academy spends a day
hosting "case exchanges" to which members submit interesting radiological cases
which are then discussed. This has proved to be most successful.
The next Scientific Meetings of the Canadian Academy are tentatively scheduled
for Vancouver, British Columbia in 1997 and Toronto, Ontario in 1998, pending local
arrangements. The Canadian Academy decided to meet again with the American Academy in 1999
in Chicago in conjunction with the Annual Scientific Meeting of the Radiology Society of
North America. For those planning ahead, this meeting always commences the Thanksgiving
weekend at the end of November.
Newly elected officers of the Canadian Academy are; Past President - Paula
Sikorski; President - Michael Pharoah; Vice President - Grace Petrikowski who is also the
current Secretary -Treasurer until some one is elected to that position. Grace can be
contacted at Department of Oral Radiology, Faculty of Dentistry, University of Toronto,
124 Edward Street, Toronto, Canada M5G 1G6. Email: gpetrikowski@dental.utoronto.ca
Information about the Canadian Academy can also be obtained from this writer or from
Garnet Packota at the University of Saskatchewan; email address : packota@sask.usask.ca
For those with long term planning in mind. The 48th Meeting of the American
Academy will be held at the Arlington Renaissance Hotel, across the river from Washington,
DC from October 15 through 19, 1997. The following year the 49th Meeting will be held in
Santa Fe, New Mexico from October 14 through 18, 1998. I will be happy to provide further
information regarding these meetings or contact Dr. Kevin O Carroll, the Executive
Secretary at 601 984-6060.
Looking forward to meeting every one next year in June in Louisville at the IADMFR and in October in Washington at the American Academy Meeting.
Pleese inform all your radiology colleagues about these meetings.
My email address is: njs2@columbia.edu
Neill Serman
American Representative
Division of Oral Radiology,
School of Dental and Oral Surgery,
Columbia University
At the end of the May, 1996, our Asian area had our 1st combine congress of Ora1
and Maxillofacial Radiology at Tokyo. Congratulation to Professor Takehito Sasaki and your
organizing committee held a successfu1 combine meeting. I would like to represent our
foreign participants to express our appreciation for your thoughtfu1 arrangements during
the times when we were in Tokyo. We had 8 persons from Taiwan and 3 presentations were
reported in this congress.
From August 22-25, 1996, Professor Xu-Chen Ma chaired the 3rd Chinese National
Congress of Ora1 Radio1ogy in Qingdao city. This is my first time to attend the meeting in
China. I am very glad to see so many chinese radiologists to share their own experiences
in this meeting. Beside many new friends are being made, l have a 1ot of happy moments
with my old Japanese companions.
The 4th annua1 scientific meeting of the Taiwan Academy of Ora1 Pathology take
place at the Chang Gung Memoria1 Hospital in Kaohsiung city on November 2-3, 1996. The
main theme of this meeting is " How to diagnose the sa1ivary gland disease" .
The specia1 1ectures include the clinica1 and pathological diagnosis of the salivary gland
disease.
Yat-Hang Yan
Oral Diagnostic Department,
School of Dentistry,
Kaohsiung Medical College
Return
Greetings from the United Kingdom
Professor David Smith retired from his post of Professor of Dental Radiology at King's College School of Medicine and Dentisry in September 1996. He will be greatly missed and we wish him a happy and fruitful retirement. He led a very interesting professional life having first been a Master Mariner working with various shipping lines around the world, then entering dentistry and rising to the post of Professor in Dental Radiology. During his period as Head of Department the found time to enter politics and became an elected member of the Greater London Council (the government of London) and became the opposition education spokesman.
David Smith pioneered the distance learning course leading to an MSC in Dental Radiology. This was the first course in a clinical subject that could be achieved by correspondence and short periods of intense clinical activity at King's College. The use of CD Rom as a means of giving each student sets of radiographic images to discuss and comment on was also a first.
In the European field of Dental Radiology he will be remembered, during his
period as President of the British Society of Dental and Maxillo-facial Radiology
1977-1979, as the convener of the first "get together" of European Dental
Radiologists.This first meeting was limited to European Economic Union countries. The
second European Meeting was called by David Smith when he was again the President of
British Society of Dental and Maxillo-Facial Radiology 1985-1987. This included all
European countries and led to the determination to have further European Meetings. The
first formal European Meeting was organised by Professor Frederick Pasler in Geneva.
We wish David a rewarding and pleasurable retirement and wish him long life to
enjoy his various pursuits.
Brian C. O'Riordan
King's College School of Medicine and Dentistry
Return
Miscellaneous
New Odontologie Doctors In Malmö
During the spring 1996, Doctors Knutsson, Liedberg, Lindh, and Näsström
defended their theses for the Odontologie Doctor degree at the Faculty of Odontology, Lund
University, Sweden. In the end of May at the yearly promotion of Lund University all four
were given the insignia of learning as symbols of their new degrees together with 200
doctors of 7 other faculties. The top hat (symbol of freedom), the ring (pledge of sincere
faith) and the diploma (symbol of learning and merit).
Here, the photo from May 31, 1996 presents Kerstin Knusson as a new doctor, with
one of the faculty marshalls with orange ribbon. Kerstin Knutsson's thesis "The
mandibular third molar. Dentists' judgement in the removal of asymptomatic molars"
was based on the following papers:
I. Knutsson K, Brehmer B, Lysell L, Rohlin M. General dental practitioners'
evaluation of the need for extraction of asymptomatic mandibular third molars. Community
Dent Oral Epidemiol 1992; 20:347-50.
II. Knutsson K, Brehmer B, Lysell L, Rohlin M. Asymptomatic mandibular third
molars: oral surgeons' judgement of the need for extraction. J Oral Maxillofac Surg 1992;
50:329-33.
III. Lysell L, Brehmer B, Knutsson K, Rohlin M. Rating the preventive indication
for mandibular third-molar surgery. The appropriateness of the visual analogue scale. Acta
Odontol Scand 1995; 53:60-4.
IV. Lysell L, Brehmer B, Knutsson K, Rohlin M. Judgement on removal of
asymptomatic mandibular third molars: influence of the perceived likelihood of pathology.
Dentomaxillofac Radiol 1993; 22:173-7.
V. Knutsson K Brehmer B, Lysell L, Rohlin M. Judgement on removal of
asymptomatic mandibular third molars: influence of position, degree of impaction and
patient's age. Acta Odontol Scand 1996; 54.
VI. Knutsson K, Brehmer B, Lysell L, Rohlin M. Pathology associated with
mandibular third molars subjected to removal. Oral Surg Oral Med Oral Pathol Oral Radiol
Endod 1996; 82:10-7.
Supervisors of research training were Professor Madeleine Rohlin, Malmö and
chief consultant Leif Lysell, Dept of Oral Surgery, Central Hospital, Kristianstad.
Faculty opponent was Associate Professor Claes Reit, Dept of Endodontics,
Faculty of Odontology, Göteborg University and the Faculy board consisted of Associate
Professor Sšren Eliasson, Dept of Oral Diagnosis, Faculty of Odontology, Karolinska
Institutet, Stockholm, Professor Hans-Gšran Gršndahl, Dept of Oral Diagnostic
Radiology, Gšteborg University, Professor Krister Nilner, Professor Jan Rosenquist
and Associate Professor Björn Söderfelt, Faculty of Odontology, Lund University.
Abstract of Dr Knutssons' thesis: The aim was to study dentists' judgement on the removal of and on the development of pathology associated with asymptomatic mandibular third molars. Thirty general dental practitioners (GDPs) and 10 oral surgeons were asked to judge 36 molars with equal distribution of three cues: patient's age, angular position and degree of impaction of the molar. Rating on a VAS was found to be an appropriate method to analyse the need for removal of asymptomatic molars.
The number of molars proposed for removal varied between 0 and 26 for the GDPs and between 3 and 21 for the oral surgeons. There was no molar all judges agreed should be removed. There was a substantial variation between the individual GDP and oral surgeon concerning the relative weight they gave different diseases for the development of pathology. The GDPs, as a group, considered cyst formation and the oral surgeons pericoronitis to be the most influential pathological entity.
Regarding the influence of the cues on the judgement of the need for removal,
there was also a considerable variation in the dentists' individual judgements. As a
group, the GDPs differentiated between two age-groups, and the oral surgeons
differentiated between three age-groups. GDPs estimated the need for removal to be highest
for distoangular and lowest for vertical molars, whereas oral surgeons gave the highest
priority to removal of vertical and distoangular molars and the lowest priority to
horizontal and mesioangular molars. Molars partially covered by soft tissue were given the
highest priority for removal by both groups of judges. The mean proportion of variation
for six diseases explained by the cues was high. Risk for molars of different angular
positions and degrees of impaction was calculated from evidence in the literature. The
risk, i.e. the odds ratio, for development of pathology was more than 22 times higher for
molars partially covered by soft tissue compared with other degrees of impaction, and 5 to
12 times higher for distoangular molars compared with molars in other positions.
Jonas Liedberg's (photo) thesis "Temporomandibular joint disc position in
the sagittal and coronal plane. A macroscopic and radiological study" was based on
the following papers:
I. Westesson P-L, Bronstein SL, Liedberg J. Internal derangement of the
temporomandibular joint: Morphologic description with correlation to joint function. Oral
Surg Oral Med Oral Pathol 1985; 59:323-31.
II. Liedberg J, Westesson P-L. Sideways position of the
temporomandibular joint disk: Coronal cryosectioning of fresh autopsy specimens.
Oral Surg Oral Med Oral Pathol 1988; 66:644-9.
III. Westesson P-L, Bronstein SL, Liedberg J. Temporomandibular joint:
Correlation between single-contrast videoarthrography and postmortem morphology. Radiology
1986; 160:767-71.
IV. Liedberg J, Westesson P-L, Kurita K. Sideways and rotational displacement of
the temporomandibular joint disk: Diagnosis by arthrography and correlation to
cryosectional morphology. Oral Surg Oral Med Oral Pathol 1990; 69:757-63.
V. Kurita K, Westesson P-L, Tasaki M, Liedberg J. Temporomandibular joint:
Diagnosis of medial and lateral disk displacement with anteroposterior arthrography.
Correlation with cryosections. Oral Surg Oral Med Oral Pathol 1992; 73:364-8.
VI. Liedberg J, Panmekiate S, Petersson A, Rohlin M. Evidence for outcome
temporomandibular joint disc position imaging. Dentomaxillofac Radiol 1996; 25:000.
Supervisors of research training were in the beginning of the training Professor
Per-Lennart Westesson, Rochester,USA, and in the end of the training Professors Arne
Petersson and Madeleine Rohlin.
Faculty opponent was Professor Tore Larheim, Faculty of Odontology, Oslo
University, Norway, and the Faculty board consisted of Professor Annika Isberg, Dept of
Oral Diagnostic Radiology, Umeå Professor Bo Nilsson, Dept of Orthopedics, Malmo,
Associate Professor Lars Eriksson, University Hospital, Lund, Professor Per-Olof Glantz
and Associate Professor Maria Nilner, Faculty of Odontology, Lund University
Abstract of Dr Liedberg's thesis: TMJ autopsy specimens were studied macroscopically and arthrographically with respect to the disc position in the sagittal and the coronal planes. After single-contrast arthrography of the lower joint space, the specimens were cryosectioned. The arthrographic findings were correlated with the morphological findings. Anterior disc position was found in about two thirds and sideways disc displacement in about one third of the joints. Some of the sideways displaced discs also exhibited an anterior displacement, hence a rotational disc displacement. Superior disc position was associated with biconcave disc configuration and anterior disc position with disc deformation (p<0.001). Perforation of the disc or posterior attachment was more frequent in joints with complete anterior disc position than in other joints (p<0.03). The diagnostic outcome of arthrography in diagnosing anterior disc position in the sagittal plane was high, with a positive predictive value of 0.88 and a negative predictive value of 0.78. In diagnosing a perforation, the corresponding figures were 0.80 and 1. The diagnostic outcome of arthrography in diagnosing sideways and rotational disc displacement was low, both in the sagittal and in the anteroposterior projection.
Studies on imaging of TMJ disc position published from 1978 to 1994 were
reviewed. More than 400 studies on arthrography, CT and MRI were found. Only about 7% of
the studies presented the diagnostic outcome of the method described. In diagnosing
anterior disc position, arthrography exhibited the highest likelihood ratio for a positive
test, 4.5 as compared with 2.3 for MRI and 2.1 for CT. In diagnosing sideways and
rotational disc displacement, MRI showed the highest outcomes, with a likelihood ratio for
a positive test of 9.3, as compared with 3.8 for arthrography.
Dr Christina Lindh on the photo together with the Faculty opponent Professor
Hans-Göran Gröndahl after their debate on her thesis "Radiography of the mandible
prior to endosseous implant treatment. Localization of the mandibular canal and assessment
of trabecular bone". The thesis was based on the following papers:
I. Lindh C, Petersson A. Radiologic examination for location of the mandibular
canal: a comparison between panoramic radiography and conventional tomography. Int J Oral
Maxillofac Implants 1989; 4:249-53.
II. Lindh C, Petersson A, Klinge B. Visualisation of the mandibular canal by
different radiographic techniques. Clin Oral Impl Res 1992; 3:90-7.
III. Lindh C, Petersson A, Klinge B. Measurements of distances related to the
mandibular canal in radiographs. Clin Oral Impl Res 1995; 6: 96-103.
IV. Lindh C, Nilsson M, Klinge B, Petersson A. Quantitative computed tomography
of trabecular bone in the mandible. Dentomaxillofac Radiol 1996; 25:146-50.
V. Lindh C, Petersson A, Klinge B, Nilsson M. Trabecular bone volume and bone
rnineral density in the mandible. Dentomaxillofac Radiol.
VI. Lindh C, Petersson A, Rehlin M. Assessment of the trabecular pattern prior
to endosseous implant treatment. Diagnostic outcome of periapical radiography in the
mandible. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1996; 82:335-43.
Supervisors of research training were Professor Arne Petersson, Malmo and
Professor Bjorn Klinge, Dept of Periodontics, Karolinska Institutet, Stockholm.
Faculty Opponent was Professor Hans-Göran Gröndahl, Dept of Oral Diagnostic
Radiology, Faculty of Odonotlogy, Göteborg University and the Faculty Board consisted of
Professor Jan Rosenquist and Associate Professor Kjell Randow, Faculty of Odontology, Lund
University, Associate Professor Sune Ericson, Dept of Radiology, Jönköping, Professor
Ulf Lekholm, Brånemark Clinic, Gšteborg and Professor Sšren Mattsson, Dept of
Radiophysics, Malmš.
Abstract of Dr Lindh's thesis : Mandibular autopsy specimens were examined with different radiographic techniques in order to evaluate the visibility of the mandibular canal and the measurement accuracy of distances related to the mandibular canal. Hypocycloidal, spiral and computed tomography (CT) were superior to periapical and panoramic radiography in visualising the mandibular canal. The tomographic techniques were more accurate when measurements of distances related to the mandibular canal were performed. No difference in measurement accuracy was found between the tomographic techniques. Concerning visibility of the mandibular canal, interobserver agreement was lowest for periapical radiography and highest for CT. Intraobserver agreement was moderate or good for all techniques. A high interobserver variation was found for measurability of distances related to the mandibular canal.
The trabecular bone tissue in mandibular autopsy specimens was studied concerning different characteristics. Quantitative measurements of bone mass were performed and expressed as bone mineral density and trabecular bone volume. There was a significant correlation between these two measures. Significant inter-and intra-mandibular variations were found for bone mineral density as well as for trabecular bone volume.
A classification system to be used prior to implant treatment, based on the
trabecular pattern in periapical radiographs, was proposed. The proposed classification
system was compared with the classification system proposed by Lekholm and Zarb (1985) and
evaluated in terms of diagnostic accuracy and observer performance. The highest accuracy
was found when the proposed classification system was used together with reference images.
The diagnostic accuracy of the classification system devised by Lekholm and Zarb (1985)
was not possible to evaluate. Interobserver agreement was similar with and without
reference images but higher than for the Lekholm and Zarb (1985) classification.
Intraobserver agreement was comparable for the classification systems.
Karin Näsström, here before the promotion in Lund's Dome, wrote her thesis on
"Dentin formation after corticosteroid treatment. A clinical study and an
experimental study on rats" which was based on the following papers:
I. Näsström K, Forsberg B, Petersson A, Westesson P-L. Narrowing of the dental
pulp chamber in patients with renal diseases. Oral Surg Oral Med Oral Pathol 1985;
59:242-46.
II. Näsström K, Moller B, Petersson A. Effect on human teeth of renal
transplantation: a postmortem study. Scand J Dent Res 1993; 101:202-9.
III. Näsström K, Petersson A, Konrad P. Effect of intravenous administration
of corticosteroids on dentin formation in the adult rat molar. Scand J Dent Res 1989;
97:301-6.
IV. Näsström K, Odselius P, Petersson A. Energy dispersive X-ray microanalysis
of the dentin in rat molars after corticosteroid treatment. Scanning Microsc 1996;
10:(000).
V. Näsström K, Odselius P, Petersson A. Scanning electron microscopy and
energy dispersive X-ray microanalysis of the dentin in rat incisors after corticosteroid
treatment. In manuscript.
Supervisor of research training was Professor Arne Petersson, Malmö.
Facully opponent was Professor Agnar Halse, Faculty of Odontology, Bergen,
Norway, and the Faculty board consisted of Research Associate Ted Lundgren, Faculty of
Odontology, Goteborg University, Professor Ann Wenzel, Faculty of Odontology, Aarhus,
Denmark, Professor Lars Mattsson, Odont Dr Kerstin Petersson and Associate Professor
Gunnar Warfwinge, Faculty of Odontology, Lund University.
Abstract of Dr Näsström's thesis: The overall aim of this series of studies was to determine whether the extensive narrowing of the dental pulp chamber seen in dental radiographs of patients with end stage renal disease was related to the method of treatment of the renal disease. The treatments studied were immunosuppression, renal transplantation and hemodialysis. A strong correlation was found between narrowing of the dental pulp chamber and renal transplantation. In the immunosuppression group and in the renal transplantation group, the patients received immunosuppressive drugs, mainly corticosteroids and azathioprine. Significantly higher doses of corticosteroids had been given to patients showing narrowing of the dental pulp chamber than to patients without such narrowing. The total plasma clearance of the corticosteroids received was measured among transplanted patients. The total plasma clearance was lower in patients with narrowing of the dental pulp chamber than in patients without narrowing.
The morphology of the corticosteroid induced dentin in premolars from five deceased patients who had received one or more renal transplants each was compared with that in extracted teeth from five healthy individuals. The results of this study showed that dentin formation after high dose corticosteroid treatment in humans seems to start with a widening of the predentin zone, followed by extensive mineralisation causing substantial reduction of the dental pulp chamber within a few years after the start of treatment.
In an experimental study on rats it was shown that intravenous administration of
high doses of corticosteroids induced dentin formation along the pulp chamber walls in the
molars. Energy dispersive X-ray microanalysis was used for estimation of the calcium and
phosphorus content of the dentin in rat teeth. The calcium and phosphorus composition of
the corticosteroid induced dentin was found to be equal to that of normal dentin in
control rat molars, which might imply that the mineralisation process was not affected by
the corticosteroid treatment and thus the quality of the corticosteroid induced dentin
might be equal to normal dentin regarding the calcium and phosphorus composition. In a
scanning microscopy study of the morphology of the corticosteroid induced dentin in rat
incisors, it was found to be equal to that of normally formed dentin.
Paper VI of Dr Liedberg's thesis includes an extensive literature search which
is found on http://www. odont.lu.se/depts/rtg/Reflist.html
If you are interested in one of these subjects or to receive more information
please write to respective respondent.
Madeleine Rohlin
Dept of Oral Radiology,
Centre for Oral Health Sciences
Carl Gustafs väg 34,
S-214 21 Malmö, Sweden
Return
News from the IADR Diagnostic Systems Group
Diagnostic Systems Group is one of the twenty groups of the International
Association for Dental Research. IADR groups are responsible for reviewing abstracts and
organizing the scientific sessions; and for sponsoring and organizing Symposia, Lunch
& Learning sessions, and Hands-on Workshops.
Over the last few years the number and quality of submitted abstracts have been
steadily increasing and the DSG programs a total of 5-6 oral and poster sessions.
The DSG and Cariology Group will co-sponsor a Symposium at the 1997 IADR meeting
in Orlando, Florida: Practical Evidenced-Based Management of the Initial Carious Lesion.
Scheduled speakers include John Brown (patient history/disease indicators), Nigel Pitts
(caries status), Jason Tanzer (microbiological testing), Michael Dodds (caries activity
assessment), Douglas Benn (data collection and decision-making), and Kenneth Anusavice
(efficiency of non-surgical treatment). The symposium has financial support from
Colgate-Palmolive.
The DSG will also sponsor three Lunch & Learning sessions. On Thursday, 20
March, Paul van der Stelt will present Diagnostic Improvements by Digital Radiography and
Jaap ten Bosch will offer The Optical Basis of the Visual Diagnosis of Incipient Caries
and the Optical Quantification Thereof. On Saturday, 22 March, Mel Kantor will present
Evaluating the Performance of Diagnostic Tests.
Mel L. Kantor
Group Program Chair, IADR DSG
UMDNJ - New Jersey Dental School
Return
Report of the 3rd Chinese National Congress of Radiology
I was fortunate to be spending my summer holiday in Hong Kong, and therefore close enough to China to attend this conference in Qingdao from 22 - 25 September. I was not the only non-Chinese attendee; of about 130 delegates there were many from Japan,one from Taiwan,and one from Hong Kong, so we were a cosmopolitan group.
Qingdao is a coastal resort, with a population of over two million people, on
the east coast of China. It is the home of Tsingtao beer, brewed in a brewery established
by the Germans after the city became a Genman treaty port in 1868. It lies at the foot of
the Laoshan mountains and is currently going through a period of rapid expansion, of
social and business ventures.
The Congress was organised by the School of Stomatology Bejing University, under the chairmanship of Professor Ma Xu-Chen. Professor Ma and his team must be congratulated on organising a seientifically stimulating meeting, with the right balance of serious and social events, of a quality that attracted delegates not only from throughout China, but also from other countries. Amongst those present were
Professor Fnjiki. well known to all of us in IADMFR, and Dr. Kanji Kishi, who is
heavily involved in organising the 12th International Congress of Dento-Maxillo-Facial
Radiology in Osaka in 1999. The Chairman of the Chinese Society of Oral Radiology,
Professor Zou Zhao- Ju, opened the conference officially, and gave the first invited
presentation on image diagnosis of the salivary glands.
The scope of presentations was wide, and included educational and special guest
lectures from respected radiologists from China and Japan, as well as proffered
presentations. Oral and Maxillofacial Tumours, Endodontics and Periodontics, TMJ
disorders, diseases of Salivary glands, Imaging technology were all well covered. The size
of the meeting and the number of presentations enabled everyone to present to the whole
group of delegates, and avoided the conflict that can arise when there are dual or even
triple presentations. The meeting was held in a large conference room, with trade
exhibitions around the perimeter, allowing ample opportunity for us all to meet the trade
representatives, and unusually allowing them to hear all the presentations.
No conference is complete without a social programme and this was no exception.
From the moment that we were greeted at the airport, we were very well cared for and
enterained to extensive and delicious Chinese banquets on two evenings; on the third a
group of us were driven to the Tsipgtao Beer Festival which was taking place at the same
time. There were beers from all over the world and it was truly like the Munich Beer
Festival must be. The day after the meeting ended we were taken by bus to a marvelously
scenic spot further up the coast at the foot of the Laoshan mountains, where we were free
to explore temples, take a cable car to the top of the mountairn, trek to a beautiful
waterfall, and generally enjoy a day relaxing in each other's company.
On November 18, 1996 the Chinese Stomatological Association is going to be inaugurated, and stomatology will truly be recognised as an independent branch of medicine. We can look forward to further opportunities to attend meetings in this exciting, and fast-changing country, and I would certainly recommend attending, to
anyone to whom this opportunity presents.
Laetitia Brocklebank
University of Glasgow
Return
Successful South American Tour of the President and Secretary
General of the IADMFR
Professors Allan Farman and Robert Langlais gave Advances Radiological Courses in Chile and Argentina.
They were invited by Prof. Gregorio Faivovich, Regional Director South America IADMFR, who organized this tour that took place between October 23 and 30.
In Chile, the Course was given at the Radisson Royal Hotel of Santiago and was attended by 140 specialists who came from all over the Chilean territory and also by some colleagues from bordering countries: Argentina, Bolivia and Brazil.
In Argentina, the host Institution was the Faculty of Odontology. Universidad de
Buenos Aires and the organization was under the responsibility of Professors Ricardo
Luberti and Hugo Dagum.
Profs. Farman and Langlais gave Courses of 8 hours each, lecturing on very
attractive and interesting subjects. Allan Farman explored the innovative field of Digital
Radiography and Robert Langlais focused his presentation on the Diagnostic, covering
topics of great clinical interest.
The intensive scientific program developed by the guests lecturers was lighted
by a varied and enjoyable social activity that, in Chile, culminated with a full-day
excursion to Vina del Mar, one of our most beautiful seaside resorts.
The Courses were a great success in Santiago and Buenos Aires, captivating the
attention and interest of the Audience, surpasing our expectancies of promoting IADMFR and
our Louisville Congress.
Gregorio Faivovich
Regional Director South America, IADMFR
Return
Invitations for Scientific Meeting
E M Hughes, General Secretary
Australian Institute of Radiography 48th Annual National
Conferences and 15th Radiation Therapy Symposium
Date: 25th February - 2nd March 1997
Venue: Hobart, Tasmania
Contact: Mr E.M. Hughes, General Secretary A.l.R.
P.O. Box 1169, Collingwood VlC 3066, AUSTRALIA
Australian Institute of Radiography 49th Annual National Conference and 16th Radiation Therapy Symposium
Date: 25th March - 29th March 1998
Venue: Ayers Rock, Northern Territory
Contact: Mr E.M. Hughes, General Secretary A.I.R.
P.O. Box 1169, Collingwood VlC 3066, AUSTRALIA
Return
Allan G. Farman
Sprawls P, Jr. "Physical Principles of Medical Imaging, ed 2" (Hardbound, 656 pages, ISBN 0-944838-54-5, US$66.00), Medical Physics Publishing; Madison, Wisconsin; 1995.
This is a most comprehensive, but easy to read publication with many excellent ideas for presenting basic concepts of image acquisition and display. It is certainly to be recommended to all in Oral and Maxillofacial Radiology, both as a personal refresher course and as a valuable desk reference. This is also a must for all residents in Oral and Maxillofacial Radiology postdoctoral programs.
There are no fewer than 42 chapters plus a comprehensive index. Topics covered include image characteristics and quality, energy and radiation, radiation quantities and units, characteristics and structure of matter, radioactive transitions, radioactivity, X ray production, energizing and controlling the X-ray tube, X-ray tube heating and cooling, interaction of radiation with matter, radiation penetration, X-ray image formation and contrast, scattered radiation and contrast, radiographic receptors, film contrast characteristics, radiographic density control, blur - resolution and visibility of detail, radiographic detail, fluoroscopic imaging systems, image noise, digital imaging and image processing, computed tomography image formation, computed tomography image quality, ultrasound production and interactions, ultrasound imaging, the magnetic resonance image, nuclear magnetic resonance, magnetic characteristics of tissue, MR imaging methods, spatial characteristics of MRI, MR image detail - noise and acquisition speed, MRI artifacts, the gamma camera, radionuclide image quality, radionuclide tomographic imaging, statistics, patient exposure and protection, personnel exposure and protection, and radiation measurement. Each of these topics is equally applicable to Oral and Maxillofacial Radioiogy as it is to medical diagnostic imaging. Each concept is accompanied with excellent line diagrams, charts or photographs. Every part of the book is very clearly written yet not over-simplistic in approach. My recommendation is to buy immediately.
Sprawls P. "RadReview: Diagnostic Radiological Physics Examination and Study Guide" (Softbound, 82 pages, ISBN 0-944838-56-1, US$21.00) MedicalPhysics Publishing; Madison, Wisconsin; 1995.
This thin spiral-bound volume is meant as a study guide. It consists entirely of multiple choice questions with sections containing answers and discussions. Perhaps this would be useful for someone studying for Boards in Oral and Maxillofacial Radiology; however, this reviewer found the questions to lack depth and not to be particularly focussed on issues of greatest interest to our discipline. I find little of value in this publication and do not recomend its purchase even at the low price of $21.00.
Cahill DR, Orland MJ, Miller GL. "Atlas of Human Cross-Sectional Anatomy, ed 3" (Hardbound, 312 pages, ISBN 0-47l-59165-3, US$159.95) Wiley-Liss; New York; 1995.
Sections of interest to oral and Maxillofacial Radiologists in this edition concern the CT and MR images of the head both at 0 and 20 from the orbitomeatal plane, in sagittal and in coronal planes. This represents approximately one-third of the book (l02 pages). In general, the atlas is well illustrated with the diagnostic images displayed one to a large format page (l3 x 10 inches) and accompanied in each case by a excellent line diagram. Anatomical features are labelled both on the images and on the associated diagram.
One small problem is that the diagrams only approximate the levels displayed; hence, it is not possible to locate all of the features displayed on the diagrams in the images, and vice versa. Presumably, as newer, better images have become available these have been substituted, however; the original line diagrams from the previous editions have been retained. Nevertheless, this is still a useful resource regarding normal anatomy on sectional images of the head primarily using MR, with a few CT images for the orbitomeatal plane sections.
This book is recommended as a desk reference work for those engaged in examination of sectional CT and MR images of the head.
Ward, H. Snowden "Practical Radiography" (Softbound, 109 pages, ISBN 0-944838- 49-9, US$14.00) Medical Physics Publishing; Madison, Wisonnsin; 1995.
This useful little book is most complete in that it not only introduces the medical uses of x radiation, but also details the methods of making induction coils, "the apparatus," and x-ray plates. What is really remarkable is that this is a reprint of a book first published early in 1896. The last portion of the book shows that conunercialism was alive and well from the beginning of our discipline. There are numerous reproductions of advertisements that are equally interesting to the actual text. This is a must reading for all in our field and certainly recommended at such a small price. It is available directly from this nonprofit publisher at $l4.00 plus $4.75 shipping and handling. Enquiries can be made via fax at +1 (608) 265.2121 or via the internet at: mpp@macc.wisc.edu
Hajime Fuchihata
Time has passed rapidly and the 11th International Congress in Louisville, Kentucky is now coming nearer and you would have submitted the abstracts and registrations when you receive this issue.
By enthusiastic and minute preparation by the President, Professor Allan G. Farman and his staff of the Organizing Committee I am sure that all the participants could expect the most exciting and fruitful scientific meeting in the history of IADMFR.
As shown in increasing the regional activities, such as European congress, Asian Congress, Latin American Congress, African Congress and American and Canadian Joint Meeting, etc., the world-wide scientific activities in the field of oral and maxillofacioal radiology have much increased and developed for the recent years. Furthermore, many colleagues come and go and have friendly relations with each other in those national meetings. I think now we should focus them to the next meeting in Louisville.
Concerning the Newsletter only one issue is left for my editing. The last
issue during my period is scheduled to publish at the end of next May or early next June.
I would like all contributors to send the manuscripts and related materials until March
31, 1997, with many thanks for your kind cooperation.
Get together and see you in Louisville!!