Prevalence and Characteristics of the Articular Tubercle on Cone Beam Computed Tomography: A Retrospective Study

Abstract

Introduction: Pneumatisation represents areas of minimal resistance, making it easier for the expansion of numerous pathological processes such as tumours, infections, or fractures into the joint. Detection of these air-filled cavities is necessary before planning surgical intervention in order to prevent complications. Aim: To assess the prevalence and characteristics of Pneumatisation of the Articular Eminence of the Temporal Bone (PAT) in the Bengaluru population. Materials and Methods: A retrospective study was conducted in the Department of Oral Medicine and Radiology at an esteemed Dental College and Hospital in Bengaluru, Karnataka, India. The study lasted for 13 months, from March 2019 to February 2020. The study included Cone Beam Computed Tomography (CBCT) images of 133 patients (84 males and 49 females) aged between 20-80 years. Based on age, the study group was divided into five groups with an age interval of 10 years, and the prevalence, laterality, and type of pneumatisation of the articular eminence were assessed. The obtained data were statistically analysed using the Chi-square test and McNemar’s test with a significance level of p-value<0.05. Results: Out of the 133 CBCT images evaluated, PAT was noticed in 62 subjects, with an overall prevalence of 46.6%. The highest prevalence of pneumatisation (62.5%) was present in the age group of 61-70 years, followed by 53.8% in the 31- 40 years age group. A male predilection was noted with the maximum prevalence during the sixth decade, followed by the third decade of life. There was an equal distribution in terms of laterality, and the multilocular type of pneumatisation was more common than the unilocular type. Conclusion: The prevalence of PAT was 46.6% and was predominantly seen in males compared to females. Multilocular PAT was more commonly seen than unilocular PAT.