Pe. Legrell et A. Isberg, MANDIBULAR HEIGHT ASYMMETRY FOLLOWING EXPERIMENTALLY-INDUCED TEMPOROMANDIBULAR-JOINT DISK DISPLACEMENT IN RABBITS, Oral surgery, oral medicine, oral pathology, oral radiology and endodontics, 86(3), 1998, pp. 280-285
Citations number
15
Categorie Soggetti
Pathology,Surgery,"Dentistry,Oral Surgery & Medicine
Objective. The purpose of this study was to test the hypothesis that n
onreducing disk displacement of the temporomandibular joint causes man
dibular asymmetry Study design. Unilateral anterior temporomandibular
joint disk displacement with intact posterior disk attachment was surg
ically created in the right joints of seven growing rabbits. In each o
f seven sham animals, the right temporomandibular joint was surgically
opened without any disk manipulation. Seven animals served as referen
ces. For identification of ramal growth and inferior growth at the man
dibular base, tantalum implants were inserted into the mandibular body
. Lateral cephalograms were exposed repeatedly throughout the 3-month
investigation period. Kruskal-Wallis one-way analysis of variance was
used to compare the groups. Results. Compared with the sham and refere
nce groups, the experimental group exhibited a deviant growth pattern,
with inferiorly directed growth along the mandibular base and in the
genial area. The ramal height was significantly shorter on the side wi
th disk displacement. No significant Side difference was present in th
e sham and reference groups. Conclusions. Disk displacement can cause
mandibular asymmetry in growing rabbits, including shortening of the m
andibular ramus and excessive inferiorly directed bone growth along th
e lower border of the mandible.