AUTHOR=Almashraqi Abeer A. , Aboalnaga Amira A. , Alhammadi Maged S. , Salah Fayed Mona M. 

TITLE=Positional and dimensional osseous characteristics of the temporomandibular joint in female patients with skeletal class III malocclusion and disc displacement, with and without reduction

JOURNAL=Frontiers in Oral Health

VOLUME=Volume 6 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/oral-health/articles/10.3389/froh.2025.1572305

DOI=10.3389/froh.2025.1572305

ISSN=2673-4842

ABSTRACT=IntroductionThis study aimed to compare the dimensional and positional osseous features of the temporomandibular joint (TMJ) in patients with skeletal Class III malocclusion, female patients without temporomandibular disorders (TMDs), and those with TMDs presenting as disc displacement with/without reduction (DDR/DDWR).MethodsAdult patients with skeletal Class III malocclusion and average vertical facial pattern (Mandibular plane inclination = 37 ± 5°) were categorized into the TMD group comprising patients with DDR/DDWR and the non-TMD group. Three-dimensional standardized TMJ analysis was performed using cone-beam computed tomography, which included assessments of the mandibular fossa (MF), mandibular condyle, TMJ spaces, and vertical and anteroposterior intra-joint condylar positions.ResultsThe MF location in the DDR/DDWR group was significantly more superior (p < 0.0001) and anterior (p = 0.012) relative to the respective planes. The MF width was significantly lesser (p = 0.001) with a steeper (p < 0.0001) anterior wall inclination in the DDR/DDWR group than in the non-TMD. The mandibular condyles were located significantly more laterally (p = 0.016), at a greater distance from the midsagittal plane, in the DDR/DDWR group than in the non-TMD. The anterior and medial joint spaces were significantly larger (p < 0.0001) and the intra-joint condylar positions were more posterior and superior (p < 0.0001) in the DDR/DDWR group than in the non-TMD.ConclusionsThe positional and dimensional osseous characteristics of the TMJ differed significantly between patients with skeletal Class III malocclusion without TMDs and those with DDR or DDWR.