NONSURGICAL TREATMENT OF ANTERIOR DISK DISPLACEMENT WITHOUT REDUCTIONOF THE TEMPOROMANDIBULAR-JOINT - A CASE-REPORT ON THE RELATIONSHIP BETWEEN CONDYLAR ROTATION AND TRANSLATION

Authors
Citation
Yn. Shoji, NONSURGICAL TREATMENT OF ANTERIOR DISK DISPLACEMENT WITHOUT REDUCTIONOF THE TEMPOROMANDIBULAR-JOINT - A CASE-REPORT ON THE RELATIONSHIP BETWEEN CONDYLAR ROTATION AND TRANSLATION, Cranio, 13(4), 1995, pp. 270-273
Citations number
NO
Categorie Soggetti
Dentistry,Oral Surgery & Medicine
Journal title
CranioACNP
ISSN journal
08869634
Volume
13
Issue
4
Year of publication
1995
Pages
270 - 273
Database
ISI
SICI code
0886-9634(1995)13:4<270:NTOADD>2.0.ZU;2-1
Abstract
Farrar reported that in chronic anterior disk displacement without red uction (ADD w/o R) of the temporomandibular joint (TMJ), the range of mandibular movement gradually increases and the condylar movement norm al-disk is still displaced anteriorly. The relationship between condyl ar rotation and translation was studied in opening/closing jaw movemen ts before and after joint stabilization splint therapy in a patient wi th ADD w/o R, Movements were recorded by means of an optoelectronic ja w tracking system (Metropoly, Jaws-ED) consisting of three cameras tha t register the position of six light-emitting diodes (LEDs) mounted on two target frames separately attached to the upper and lower jaw, A c omputer produced plots of the condylar paths in the sagittal, frontal, and horizontal plane, as well as the opening angle against the anteri or condylar translation, Results indicated some variations in the rela tionship between condylar rotation and translation during jaw opening movement, In the joint with ADD w/o R an increase in anterior condylar translation was found and the relationship between rotation and trans lation became more linear after joint stabilization therapy. This stud y supported a hypothesis of Farrar's that condylar movement in chronic ADD w/o R is similar to that expected in asymptomatic TMJs.