Effect of edentulousness on mandibular size and condyle-fossa position.
Effect of edentulousness on mandibular size and condyle-fossa position.
复制标题
无牙颌对下颌尺寸和髁突窝位置的影响。
DOI：
10.1046/j.1365-2842.1998.00222.x
复制
发表时间：
1998
影响因子：
2.9
通讯作者：
Juhani Pyhtinen
中科院分区：
文献类型：
--
作者：
Aune Raustia;P. Pirttiniemi;M. Salonen;Juhani Pyhtinen
现代影像学手段使颞下颌关节（TMJ）复杂骨性结构的精确检查和头影测量分析成为可能。本研究的目的是利用X线头颅X线片和轴向CT扫描分析无牙对下颌骨大小和髁突窝位置的影响。研究组包括20名无牙患者（14名女性，6名男性，平均年龄60岁），平均无牙期为20年（范围3-34年）。对其中16例患者进行了颞下颌关节CT检查，并在修复治疗后拍摄了X线头颅X线片。根据性别选择16名牙科学生作为对照。早期CT扫描的49个牙齿的主题，男女被用作对照的双髁不对称的分析。无牙颌患者的关节窝位置较有牙颌患者更靠前，且关节窝的靠前位置与无牙颌的时间有显著相关性（P < 0.02），这一发现以前未得到证实。可以得出结论，窝是一个重塑单位作为功能实体的一部分，当功能发生显着改变，如在无牙颌患者的情况下。
Modern imaging methods make possible the more precise examination of the complicated bony structure of the temporomandibular joint (TMJ) and the performance of cephalometric analysis. The aim of our study was to analyse the effect of edentulousness on the mandibular size and the condyle-fossa position using roentgencephalograms and axial computed tomography (CT) scans. The study group consisted of 20 edentulous patients (14 women, six men, mean age 60 years) whose mean period of edentulousness was 20 years (range 3-34 years). A CT examination of their TMJs was performed and roentgen-cephalograms in 16 of this group were taken after prosthetic treatment. Sixteen dental students were chosen according to sex as controls. Earlier CT scans of 49 dentate subjects of both sexes were used as controls for the analysis of bicondylar asymmetry. The position of the glenoid fossa was more anterior in edentulous subjects than in dentate ones and its anterior position correlated significantly (P < 0.02) with the period of edentulousness, a finding which has not been confirmed before. It can be concluded that the fossa is a remodelling unit as a part of the functional entity when the function is altered dramatically as in the case of edentulous patients.