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Relationship between disk displacement of temporomandibular joint and dentofacial asymmetry  

Nahm, Kyoung-Soo (Department of Orthodontics, College of Dentistry, Seoul National University)
Kim, Tae-Woo (Department of Orthodontics, College of Dentistry, Seoul National University)
Publication Information
The korean journal of orthodontics / v.33, no.3, 2003 , pp. 211-222 More about this Journal
Abstract
The purpose of this study was to determine whether there is an association between disk displacement of the Temporomandibular Joint (TMJ) and dentofacial asymmetry In orthodontic patients. The subjects consisted of 60 female orthodontic patients between the ages of 18 and 38 years (mean age 23.3 years) who had visited the Department of Orthodontics at Seoul National University Dental Hospital from January 2000 to April 2002. On the basis of magnetic resonance imaging (MRI) of their bilateral TMJs, the subjects were divided Into four groups'. bilateral normal group (twenty-one persons); disk displacement of right TMJ group (six persons); disk displacement of left TMJ group (nine persons); and disk displacement of both TMJs group (twenty-four persons) Postero-anterior (PA) cephalograms and diagnostic models which had been taken before orthodontic treatment were measured. In the linear measurements, a line connecting the right and left Latero-Orbitale (Lo) represented the horizontal reference line (H). The vertical reference line (V) was constructed as a line bisecting and running perpendicular to H. One-way analysis of variance (ANOVA) was used to test whether the mean values of measurements between groups were significantly different. In addition, Bonferronil's multiple comparison test was performed at a level of 0.05. The results were as follows; 1 In the diagnostic model analysis, the overjet, nght molar relationship, and left molar relationship were significantly different among the four groups. 2. In the PA cephalometric analysis, differences in the right and left vertical position of the lower first molar and Ag were significantly dissimilar among the four groups. 3. If the disk displacement of TMJ was present on one side, the ipsilateral ramus was shorter, resulting in asymmetry in the vertical position of Ag. This study indicated that dentofacial asymmetry might be related to the disk displacement of TMJ.
Keywords
TMJ disk displacement; MRI; PA ceph; Asymmetry;
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1 Drace JE, Enzmann DR. Defining the normal temporomandibular joint: closed-, partially open-and open-mouth MR imaging of asymptomatic subjects. Radiology 1990 : 177: 67-71
2 Katzberg RW, Westesson PL, Tallents RH, Anderson R, Kurita K, Manzione JV, Totterman S. Temporomandibular joint: MR assessment of rotational and sideways diskdisplacements, Radiology 1988: 169: 741-8
3 Legrell PE, Isberg A. Mandibular height asymmetry following experimentally induced temporomandibular joint disk displacement in rabbits. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1998 : 86: 280-85
4 Dolwick MF, Riggs RR, Diagnosis and treatment of internal derangements of the temporomandibular joint. Dent Clin North Am 1983 : 27 : 561-72
5 Ricketts RM, Bench RW, Hilgers JJ, Shulhof R. An overview of computerized cephalometries. Am J Orthod 1972 : 61 : 1-28
6 Nebbe B, Major PW, Prasad NG, Grace M, Kamelchuk LS. TMJ internal derangement and adolescent craniofacial morphology: a pilotstudy Angle Orthod 1997 : 6 : 407-14
7 Dahlberg G. Statistical methods for medical and biological students, London: George Allen and Unwin Ltd.,1940: 122-32
8 Tasaki MM, Westesson PL. Temporomandibular joint: diagnostic accuracy with sagittal and coronal MR imaging. Radiology 1993 : 189: 823-7
9 Svanholt p. Solow B. Assessment of midline discrepancies on the postero-anterior cephalometric radiograph. Trans Eur Orthod Soc 1977 : 25 : 261-8
10 Grummons DC, Kappeyne van de Coppello MA. A frontal asymmetry analysis. J Clin Orthod 1987 : 21 : 448-65
11 Trpkova B. Major PW, Nebbe B, Prasad NG. Craniofacial asymmetry and temporomandibular joint internal derangement in female adolescents: a posteroanterior cephalometric study. Angle Orthod 2000 : 70 : 81-8
12 Okesson JP. Managemant of temporomandibular disorders and occlusion, ed 5. St. Louis: Mosby. 2003
13 Mulick JF. An investigation of craniofacial asymmetry using the serial twin study method. Am J Orthod 1965 : 51 : 112-29