Department of Prosthodontics, Faculty of Dentistry, Denis Diderot University, Hôtel-Dieu, Garancière Dental Hospital, Paris, France.
J Prosthodont. 2011 Jun;20(4):294-8. doi: 10.1111/j.1532-849X.2011.00715.x. Epub 2011 May 17.
The aim of this study was to determine the condylar form, incline, and movement characteristics during protrusive movement in fully edentulous complete denture wearers. The study went on to analyze the occlusal consequences on the setup of artificial posterior teeth and the occlusal grinding phase.
The study included 60 complete denture wearers (aged 58 to 74 years), who received a new set of complete dentures for this study. The patients did not present signs of muscular or articular pain. Protrusive movements were recorded by a SAM(®) electronic axiography system.
Condylar paths exhibited fairly specific characteristics in the completely edentulous patients, particularly path forms, which had highly specific patterns. Three condylar path forms were determined: the classic form following a convex curve (41% of cases), a sinusoidal form that flattened out in the first 2 mm before following a convex curve (51%), and a rectilinear path (9%). The mean condylar angles also exhibited specific patterns. The mean started in the first millimeter of protrusive movement, at 32.2°± 14.9°, and then increased in the second millimeter to 40.4°± 11.9°, reaching 44.5°± 9° at 5 mm.
During protrusive movement in completely edentulous patients, the condylar path patterns were different than conventionally described patterns. In particular, the sinusoidal form was frequently found, and the incline of the condylar slope was low. These factors need to be taken into account during the final occlusal selective grinding for new sets of complete dentures.
本研究旨在确定全口义齿患者前伸运动时髁突形态、倾斜度和运动特征。本研究还分析了人工后牙设置和咬合研磨阶段的咬合后果。
本研究纳入了 60 名全口义齿佩戴者（年龄 58-74 岁），他们为这项研究接受了新的全口义齿。这些患者没有出现肌肉或关节疼痛的迹象。前伸运动通过 SAM（®）电子轴向记录系统进行记录。
髁突路径在完全无牙患者中表现出相当特定的特征，特别是路径形态，具有高度特定的模式。确定了三种髁突路径形态：经典形态遵循凸曲线（41%的病例）、在凸曲线之前先变平的正弦形态（51%）和直线形（9%）。平均髁突角度也表现出特定的模式。平均起始于前伸运动的第一毫米，为 32.2°±14.9°，然后在第二毫米增加到 40.4°±11.9°，在 5 毫米时达到 44.5°±9°。
在完全无牙患者的前伸运动中，髁突路径模式与传统描述的模式不同。特别是，经常发现正弦形态，并且髁突倾斜度较低。在为新的全口义齿进行最终的选择性咬合研磨时，需要考虑这些因素。
