Dublin Dental School and Hospital, Trinity College, Dublin, Ireland.
Int J Prosthodont. 2011 Jan-Feb;24(1):16-25.
During extensive prosthodontic treatment, the use of an accurately adjusted articulator is recommended to simulate mandibular movements. This clinical study was undertaken to assess any possible effect of the underlying skeletal pattern on programming articulator settings.
Subjects (n = 73, mean age: 22.8 ± 6.8 years) were recruited from a dental school and two regional specialist orthodontic units. Subjects were allocated into groups based on their underlying sagittal (I, II, or III) and vertical (reduced, average, or increased) skeletal patterns by three orthodontists and three prosthodontists who examined their profile photographs. Electronic pantographic recordings were made of each subject using the Cadiax Compact system to record the sagittal condylar inclination (SCI), progressive mandibular lateral translation (PMLT), and immediate mandibular lateral translation (IMLT).
Agreement between assessors for sagittal skeletal pattern classification was excellent (97% for total or good agreement); agreement for vertical skeletal pattern was high, but at a lower level than that for sagittal relationships (70% for total or good agreement). SCI settings for sagittal II subjects were significantly higher than those for sagittal I (P < .05) and sagittal III (P < .001) subjects. Differences were statistically significant, with mean SCI differences of 4 and 7 degrees, respectively. No statistical difference could be observed between SCI values in the sagittal I and III groups. Subjects with an average vertical skeletal pattern had SCI values lower than those with a reduced vertical skeletal pattern (P = .058) and an increased vertical skeletal pattern (P < .01, statistically significant). No patterns could be determined for PMLT or IMLT between the study groups.
During prosthodontic treatment of patients with a noticeable skeletal discrepancy, appropriate consideration should be given to customizing SCI values.
在广泛的修复治疗中，建议使用精确调整的架来模拟下颌运动。本临床研究旨在评估下颌骨形态对架设置编程的潜在影响。
从一所牙科学校和两个地区的专科正畸单位招募了 73 名受试者（平均年龄：22.8 ± 6.8 岁）。通过三位正畸医生和三位修复医生根据受试者的矢状（I、II 或 III）和垂直（减小、平均或增加）骨骼形态将他们分为组，他们检查了受试者的侧貌照片。使用 Cadiax Compact 系统对每位受试者进行电子描记记录，以记录矢状髁突倾斜度（SCI）、渐进性下颌侧向平移（PMLT）和即刻下颌侧向平移（IMLT）。
评估者对矢状骨骼形态分类的一致性非常好（总或良好一致的为 97%）；垂直骨骼形态的一致性很高，但低于矢状关系的一致性（总或良好一致的为 70%）。矢状 II 组的 SCI 设置明显高于矢状 I（P <.05）和矢状 III（P <.001）组。差异具有统计学意义，平均 SCI 差异分别为 4 度和 7 度。在矢状 I 和 III 组之间，SCI 值没有观察到统计学差异。垂直骨骼形态平均的受试者的 SCI 值低于垂直骨骼形态减小的受试者（P =.058）和垂直骨骼形态增加的受试者（P <.01，有统计学意义）。在研究组之间，无法确定 PMLT 或 IMLT 的模式。
在对骨骼差异明显的患者进行修复治疗时，应适当考虑定制 SCI 值。
