Cordeiro Cláudia-da Costa, Pozza Daniel-Humberto, Tamaki Tadachi, Guimarães Antônio-Sérgio
DDS, MSc in Morphology, UNIFESP/Paulista School of Medicine, Brazil.
DDS, PhD, Associate Professor, Department of Biomedicine, Faculty of Medicine and Faculty of Nutrition and Food Science, Universidade do Porto, I3s, Porto, Portugal and Universidad Europea de Madrid.
J Clin Exp Dent. 2018 Jan 1;10(1):e61-e65. doi: 10.4317/jced.54168. eCollection 2018 Jan.
The search for the ideal, healthy and reproducible position of the condyles is of utmost importance for dental diagnosis and treatment. Thus, the objective of this laboratory cross-sectional study was to verify the relationship between the posterior joint space and the mandibular lateral movements.
Dental casts from 15 women and 15 men with normal mastication, 28 natural teeth and no history of temporomandibular disorders or pain, were fabricated and mounted on a fully adjustable articulator. From the maximum intercuspal position, condylar displacement was evaluated and measured on the working and nonworking sides during mandibular lateral movement, both to the right and left sides.
The correlation between the measures of interest was assessed with the Pearson correlation coefficient (α=.05). Condylar displacement on the working side and nonworking side condyle was 0.88±0.71 mm and 3.57±1.11 mm (right mandibular lateral movement); and 0.91±0.58 mm and 3.51±0.78mm (left mandibular lateral movement), respectively. No significant correlation in the condylar displacement between the working side condyles on the right and on the left sides was observed (r=.22; P=.248). The condylar poles of the articulator moved posteriorly, simulating the functional movements of the mandible during mastication. In all cases, condylar displacement during mandibular lateral movement both to the right and left occurred posteriorly on the working side condyle.
The condylar poles of the articulator moved posteriorly simulating the functional movements of the mandible during mastication. Moreover, left and right working condyles may require slightly different spaces to function, suggesting minor anatomical asymmetries. Mastication, dental occlusion, prosthodontics.
寻找髁突理想、健康且可重复的位置对口腔诊断和治疗至关重要。因此，本实验室横断面研究的目的是验证关节后间隙与下颌侧向运动之间的关系。
制作了15名男性和15名女性的牙列模型，这些受试者咀嚼功能正常，有28颗天然牙，无颞下颌关节紊乱或疼痛史，并将其安装在全可调牙合架上。从最大牙尖交错位开始，在下颌向右侧和左侧侧向运动时，对工作侧和非工作侧的髁突移位进行评估和测量。
采用Pearson相关系数评估感兴趣指标之间的相关性（α = 0.05）。工作侧髁突移位和非工作侧髁突移位分别为0.88±0.71mm和3.57±1.11mm（右侧下颌侧向运动）；以及0.91±0.58mm和3.51±0.78mm（左侧下颌侧向运动）。未观察到右侧和左侧工作侧髁突移位之间存在显著相关性（r = 0.22；P = 0.248）。牙合架的髁突极向后移动，模拟咀嚼时下颌的功能运动。在所有情况下，下颌向右侧和左侧侧向运动时，工作侧髁突的移位均发生在后方。
牙合架的髁突极向后移动，模拟咀嚼时下颌的功能运动。此外，左右工作侧髁突可能需要略有不同的空间来发挥功能，提示存在轻微的解剖学不对称。咀嚼、牙合、口腔修复学。
