Abstract
Many studies have explained temporomandibular joint (TMJ) sounds in children are frequent with TMJ disorder. In addition to multiple divergent findings are designed to evaluate the relationship between bruxism and TMJ disorder in children. Aim: study was designed and conducted to assess the possible relationship between bruxism and joint sounds in schoolchildren. Subjects and Methods: The sample comprised 60 schoolchildren participants between 6 to 10 years of age, of whom 30 children with bruxism as study group G1 and another 30 without bruxism as a control group G2 who were scheduled and randomly selected for treatment at (Outpatient Dental Clinics, Zagazig University Hospital). Examiner performed assessment who was blinded allocation of the groups. Assessment involved of (manual palpation, lateral and dorsal extra-auricular auscultation of TMJ by stethoscope for detecting of joint sounds, differentiating between joint sounds as a click/pop or crepitation) Three readings were performed on each participant. Collected data were checked, entered and statistically analyzed to test different variables by chi-square test with the level of significance (p< 0.05). Results: There were statistically significant association between joint sounds with regarding to bruxism and age, which showed the higher prevalence rates of joint sounds were found in children aged eight to ten years in comparison to those aged sex and seven years. However, there were statistically insignificant association between joints sounds and type in relation to gender. Conclusion: The bruxism in children may be associated with the symptoms of joint sounds with significant association regarding to age. Keywords: Bruxism; Temporomandibular Joint; Child; bruxism; TMJ sound
Highlights
The prevalence of temporomandibular joint (TMJ) disorder is not well known, with a frequency ranging from 16.3 to 68% [1,2,3]
The bruxism in children may be associated with the symptoms of joint sounds with significant association regarding to age
There are variations regarding the TMJ disorder prevalence from center to center and from country to another depending on evaluation and diagnosis methods of TMJ disorder that is beside the contributory variations such as sample size, sample selection, the age group heterogeneity and difference in method of examination used in each study [1,4,5]
Summary
The prevalence of TMJ disorder is not well known, with a frequency ranging from 16.3 to 68% [1,2,3]. Bruxism is a very common condition in 85%–90% of the population [11] and the term is defined as a repetitive jaw muscle activity characterized by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible[12]. In the second edition of the ICSD in 2005, sleep bruxism was categorized as a sleep-related movement disorder and defined as an oral parafunctional activity characterized by tooth grinding or jaw clenching during sleep, usually associated with sleep arousals 14. An updated definition of general bruxism was adopted for the third edition of the ICSD: a repetitive jaw-muscle activity characterized by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible. Considering the consequences of these aspects to the TMJ, the present study was conducted to investigate the possible relationship between bruxism and joint sounds in schoolchildren
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