An MRI evaluation of the effects of qat chewing habit on the temporomandibular joint

Publication date: Available online 29 May 2018
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Abeer A. Almashraqi, Eman A. Ahmed, Nashwa S. Mohamed, Esam S. Halboub
ObjectiveTo investigate the effects of qat chewing habit (QCH) on the temporomandibular joint (TMJ) using magnetic resonance imaging (MRI).Study designSixty subjects were included: a study group (SG, 40 qat chewers) and a control group (CG, 20 non-chewers). Based on QCH duration, the SG was subdivided into three subgroups: subgroup I (5-10 years), subgroup II (11-15 years), and subgroup III (>15 years). Data on QCH were recorded and a standardized clinical examination was performed. Bilateral oblique sagittal MRI sections were obtained to evaluate disc displacement, osteoarthritis (OA), and joint effusion (JE).ResultsClicking and pain were diagnosed in 72.5% and 65.0% of SG subjects, respectively. Significant differences were discovered between SG and CG in OA and JE (P=0.003 and 0.002, respectively). Regarding QCH duration, there were differences between subgroup II and subgroup III versus CG in OA (P=0.004 and 0.001, respectively) and the three subgroups versus CG in JE (P=0.026, 0.004, and 0.001, respectively). Significant correlations were found between OA and clicking (P=0.006) and muscle pain (P≤0.044), and between JE and TMJ pain (P=0.006) and muscle pain (P≤0.046).ConclusionsQCH may be a risk factor for TMJ disorders with high percentage of OA and JE.



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