Three-Dimensional Evaluation of Temporomandibular Joint Intraosseous Distances According to Skeletal Class Using Cone Beam Computed Tomography.

IF 1.8 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical, Cosmetic and Investigational Dentistry Pub Date : 2026-07-31 eCollection Date: 2026-01-01 DOI:10.2147/CCIDE.S602113

Gissela Maribel Lema-Paguay, Magaly Noemí Jiménez-Romero, Miriam Lima-Illescas, Fabián Darío Bautista Rojas

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Abstract

Objective: To evaluate the relationship between sagittal temporomandibular joint (TMJ) spaces and skeletal class using cone-beam computed tomography (CBCT).

Materials and methods: Forty-eight CBCT scans were analyzed and equally distributed among skeletal class (I, II, and III) based on the Beta angle. Anterior (AS), superior (SS), and posterior (PS) joint spaces were measured on standardized sagittal reconstructions using an Instrumentarium OP300 unit. Condylar positional patterns were analyzed according to skeletal class.

Results: Significant intergroup differences in joint space measurements were identified (p < 0.05), primarily on the right side. Skeletal Class II presented the greatest dimensions (AS: 2.67 ± 1.04 mm; SS: 3.03 ± 0.98 mm; PS: 2.58 ± 0.87 mm), consistent with a more posterior and inferior condylar position. Conversely, Skeletal Class III consistently exhibited the lowest values (AS: 1.85 ± 0.65 mm; SS: 2.12 ± 0.62 mm; PS: 1.74 mm), indicating reduced joint space dimensions.

Conclusion: Sagittal evaluation using CBCT revealed that skeletal class influences joint space dimensions, with larger joint space dimensions observed in Skeletal Class II patients. Bilateral variations may reflect morphological adaptations associated with skeletal patterns.

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利用锥束计算机断层扫描对骨分类的颞下颌关节骨内距离进行三维评估。

目的：应用锥形束计算机断层扫描（CBCT）评价颞下颌关节（TMJ）矢状面间隙与骨骼类型的关系。材料和方法：对48张CBCT扫描图进行分析，并根据β角在骨骼类（I、II、III）中均匀分布。前（AS）、上（SS）和后（PS）关节间隙采用标准化矢状面重建仪（instrumarium OP300）测量。根据骨骼分类分析髁突位置模式。结果：组间关节间隙测量差异显著（p < 0.05），主要在右侧。II类骨骼尺寸最大（AS: 2.67±1.04 mm; SS: 3.03±0.98 mm; PS: 2.58±0.87 mm），与更后、更下的髁位一致。相反，骨骼III类始终表现出最低的值（AS: 1.85±0.65 mm; SS: 2.12±0.62 mm; PS: 1.74 mm），表明关节空间尺寸减小。结论：CBCT矢状面评估显示骨骼类别影响关节间隙尺寸，骨骼II类患者关节间隙尺寸较大。双侧变异可能反映了与骨骼模式相关的形态适应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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