الفهرس 
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Abstract
The purpose of this study was to determine the prevalence of temporomandibular joint disorders
(TMD) among postgraduate students at Egyptian universities and to investigate the presence of a possible
relation between TMD symptoms, sex, psychological stress, parafunctional habits and other potential
factors.
Methodology: 840 postgraduate students from different Egyptian universities were recruited and
answered a specially designed online questionnaire. Out of the 840 respondents, 593 questionnaires were
included and evaluated using Fonseca’s anamnestic index (FAI) to classify them according to TMD
severity degree. Questions about psychological status, dental history and parafunctional habits were also
included.
Results: The prevalence of TMD was 73.4% with mild TMD being the most common severity (57%)
followed by moderate (31.7%) then severe (11.3%). Females exhibited some degree of TMD (73.3%) at
a higher frequency than men (54.4%). There was a statistically significant association between sex
distribution and TMD prevalence (P <0.001), with females 2.302 folds prone to TMD than males.
Psychological status (P <0.001) and some parafunctional habits also showed significant association with
TMD prevalence.
Conclusion: There’s high prevalence of TMD among Egyptian postgraduate students. There’s a strong
association between sex and TMD prevalence, with females being more susceptible to TMD
development. Psychological status and parafunctional habits are other factors that are related to TMD.