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Assessment of thickness of roof of the glenoid fossa in dentate, edentulous, and partially edentulous subjects using cone beam computed tomography (CBCT) - a retrospective study - 16/05/22

Doi : 10.1016/j.jormas.2022.05.009 
Aiswarya Chandran Kana Veettil , Abhinethra Mariyappa Shantha, Deepak Timmasandra Ashwathappa, Amirneni Sailaja Choudary, Upasana Lingaiah
 V S Dental College and Hospital, Rajiv Gandhi University of Health Sciences, Bangalore, India 

Corresponding author at: F1 Shree Residency, Brindavan First Stage, Brindavan Extension, Mysore 570020, India.F1 Shree Residency, Brindavan First StageBrindavan ExtensionMysore570020India
Sous presse. Épreuves corrigées par l'auteur. Disponible en ligne depuis le Monday 16 May 2022

Abstract

Objectives

Studies have inferred a direct association between Temporomandibular joint disorders (TMD) and the integrity of the structures associated with it such as the Glenoid fossa thereby necessitating the requirement to measure the thickness of this oft ignored entity. This study was carried out to assess the thickness of the glenoid fossa roof in dentulous, edentulous, and partially edentulous subjects using archival Cone beam computed tomography (CBCT) images.

Method

Analysis of CBCT data of 120 joints from 60 adult subjects without signs and symptoms of TMD was carried out. The scans were grouped based on the dental status as dentulous, edentulous, and partially edentulous and additionally into two sets as those below and above 40 years of age. The distance between the superior and inferior cortices of the glenoid fossa was measured indicating the thickness of the roof of the glenoid fossa in the coronal and sagittal planes, by three independent observers. Analysis of Variance (ANOVA) and Tukey's post hoc test were used to compare the association between the mean thickness of the glenoid fossa and the dentition status. A p ≤ 0.05 was considered to be significant.

Results

There was no significant association between the mean thickness of the glenoid fossa and the dentition of the study participants of all three groups, when assessed by the three observers, except the mean thickness on the right side in the sagittal section as measured by one observer. A thicker fossa was observed in edentulous subjects when compared to dentulous participants, and the difference was statistically significant (p = 0.035).

Conclusion

The thickness of the roof of the glenoid fossa demonstrated no association with the dental status of the study participants and no age or sex related differences were noted.

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Keywords : Cone-beam computed tomography, Temporomandibular joint / diagnostic imaging, Roof of glenoid fossa, Cone beam computed tomography, Temporomandibular joint, Temporomandibular joint disorder


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