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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 11    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 11, November 2011
Pilot study of the osseous morphological changes in the temporomandibular joint in subjects with bilateral missing lower posterior teeth
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Nasser Aly, Hasnah Hashim, Harlina Saleh, Dzuraida Abdullah
temporomandibular joint_ partial edentulism _ cephalograms _ osseous morphology _ occlusal support
We evaluated osseous morphological changes in the temporomandibular joints (TMJ) in subjects with bilateral missing lower posterior teeth. We selected 13 men with class ? dental occlusion who fulfilled the study criteria. They were assigned to control group comprising 8 subjects with complete set of teeth, and test group comprising 5 subjects with bilateral missing lower posterior teeth. Two cephalometric radiographs were taken for each subject, one as base line and the other after 7 months for linear measurements of the mandibular condyle. The test group showed an increase in glenoid fossa depth (base line and after 7 months, median = 0.8600 and 0.7500, interquartile range (IQR) = 0.210 and 0.310 cm, respectively) and a slight decrease in the anterior-posterior dimension of the condyle (base line and after 7 months, median = 1.1300 and 1.1100, IQR = 0.575 and 0.505 cm, respectively). The control group showed an increase in glenoid fossa depth (base line and after 7 months, median = 0.8650 and 1.0550, IQR = 0.353 and 0.215 cm, respectively) and an increase in the anterior-posterior dimension of the condyle (base line and after 7 months, median = 1.1500 and 1.1700, IQR = 0.305 and 0.180 cm, respectively). Our findings do not support the hypothesis that loss of occlusal support causes osseous changes in the TMJ in men. However, this could be due to the small sample size and shorter study duration. We suggest that these changes be studied using a larger sample size to achieve stronger conclusions.
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