Abstract
BackgroundChewing side preference (CSP) has been proposed as one etiology of temporomandibular disorders (TMDs) as it can induce the structural changes of the temporomandibular joint. But its association with the inclination of the articular eminence (IAE) is unknown. This study aimed to compare IAE between patients with CSP and without CSP.MethodsCone-beam computed tomography images of 90 patients with TMD (mean age of 45.6 years, 69 with CSP, 21 without CSP) and 20 participants without TMD and CSP (mean age of 41.3 years) were measured to compare IAE and depth of the glenoid fossa (DGF)ResultsIAE and DGF showed a positive correlation among all the participants. Compared with the participants without TMD and CSP, the TMD patients without CSP presented a similar IAE but with a significantly higher value of DGF (p < 0.05); in contrast, the TMD patients with CSP presented a significantly greater IAE and DGF (p < 0.05). No bilateral differences in IAE and DGF were observed in all the participants. Except the male patients with CSP had a deeper fossa than did the female, no differences in IAE and DGF according to gender were observed.ConclusionsTMD patients with CSP seem to have a deep glenoid fossa with steep eminence which might be considered one characteristic imaging feature.
Highlights
Chewing side preference (CSP) has been proposed as one etiology of temporomandibular disorders (TMDs) as it can induce the structural changes of the temporomandibular joint
The glenoid fossa undergoes persistent morphologic remodeling to better match with the joint disc and condyle due to the alteration of functional load, Ma et al BMC Oral Health (2021) 21:396 often associated with chewing habit, gender, food texture, and age [7]
While some research revealed a steeper inclination of the articular eminence (IAE) in the TMD patients and attributed it to the development of TMDs [1, 8,9,10], other studies failed to support the relationship between the changes of IAE and TMDs [11,12,13,14]
Summary
Chewing side preference (CSP) has been proposed as one etiology of temporomandibular disorders (TMDs) as it can induce the structural changes of the temporomandibular joint. Its association with the inclination of the articular eminence (IAE) is unknown. Numerous studies have demonstrated that temporomandibular disorders (TMDs) are closely related to the morphologic changes of the TMJs [2,3,4,5,6]. The glenoid fossa undergoes persistent morphologic remodeling to better match with the joint disc and condyle due to the alteration of functional load, Ma et al BMC Oral Health (2021) 21:396 often associated with chewing habit, gender, food texture, and age [7]. Many studies have investigated the relationship between the morphology of the glenoid fossa, especially the inclination of the articular eminence (IAE), and TMDs. the results are contradictory. While some research revealed a steeper IAE in the TMD patients and attributed it to the development of TMDs [1, 8,9,10], other studies failed to support the relationship between the changes of IAE and TMDs [11,12,13,14]
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