Gross M, Nemcovsky C, Friedlander L D
The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University.
Int J Prosthodont. 1990 Mar-Apr;3(2):135-41.
The reproducibility of arcon semiadjustable Whip Mix, Denar Mark II, and Hanau 158 articulators was tested using multiple protrusive and lateral edge-to-edge wax interarch registrations made with an interocclusal device. Photographic and cephalometric tracings verified an identical angulation between the axis-orbital craniofacial reference plane and the maxillary occlusal plane for the subject and both the Denar Mark II and Hanau 158 articulators. This angle was 2.5 degrees less in the Whip Mix instrument. Three operators made three settings for each of 12 protrusive and 24 lateral interarch registrations for each articulator. Results showed significant differences between instruments. Whip Mix consistently gave the highest.angulations and Hanau 158 the lowest. For protrusive records there was no significant difference between examiners, but for lateral records a significant difference in examiner registration was found. For both protrusive and nonworking registrations, interaction was seen between instrument and operator and between instrument and registration, and a significant difference was seen between records. This study supports previous studies showing that semiadjustable articulators using interarch records have a low level of reproducibility and are subject to variables of instrument, operator, and occlusal records.
使用咬合间装置制作多个前伸和侧方边缘对边缘蜡颌间记录，对Arcon半可调式Whip Mix、Denar Mark II和Hanau 158牙合架的可重复性进行了测试。摄影和头影测量描记证实，对于受试者以及Denar Mark II和Hanau 158牙合架而言，轴眶颅面参考平面与上颌牙合平面之间的角度相同。在Whip Mix仪器中，这个角度小2.5度。三名操作人员对每个牙合架的12个前伸和24个侧方颌间记录分别进行了三次设置。结果显示仪器之间存在显著差异。Whip Mix始终给出最高的角度，Hanau 158给出最低的角度。对于前伸记录，检查人员之间没有显著差异，但对于侧方记录，发现检查人员的记录存在显著差异。对于前伸和非工作记录，在仪器与操作人员之间以及仪器与记录之间均观察到相互作用，并且记录之间存在显著差异。本研究支持先前的研究，表明使用颌间记录的半可调式牙合架可重复性水平较低，并且受仪器、操作人员和咬合记录变量的影响。
