Petridis Haralampos P, Tsiggos Nikolaos, Michail Achilleas, Kafantaris Sotirios N, Hatzikyriakos Andreas, Kafantaris Nikolaos M
Dept. of Fixed Prosthesis and Implant Prosthodontics, Dental School, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Eur J Prosthodont Restor Dent. 2010 Jun;18(2):78-83.
The purpose of this study was to study the stability of teeth adjacent to posterior edentulous spaces and correlate it with patient age and time lapse since tooth loss. Dental casts, panoramic radiographs, and questionnaires of patients treated in a University setting were employed. Teeth adjacent and opposing posterior edentulous spaces were examined for the following parameters: Supraeruption, rotation, space closure, and axial inclination. One hundred twenty three patients with 229 edentulous spaces were analyzed. Statistical analysis showed that the effects of "jaw", "gender", and "age group at the time of tooth loss" were not significant for any of the variables tested. The effect of time lapse since tooth loss was significant regarding the "amount of distal tooth inclination" (P<0.001), the "amount of distal tooth rotation" (P=0.004), and "space closure" (P=0.038). Post-hoc analysis of the "amount of distal tooth inclination" revealed a marked increase in inclination 5 years after tooth loss. Within the limitations of this study, it was concluded that in the group of patients studied, minor positional changes in teeth opposing or adjacent to posterior edentulous spaces had occurred. The greatest changes in position were recorded for mandibular teeth distal to edentulous spaces.
本研究的目的是研究后牙无牙间隙相邻牙齿的稳定性，并将其与患者年龄及牙齿缺失后的时间间隔相关联。采用了在大学环境中接受治疗患者的石膏模型、全景X线片和调查问卷。对后牙无牙间隙相邻及相对的牙齿检查以下参数：牙齿伸长、旋转、间隙关闭和轴向倾斜。分析了123例患者的229个无牙间隙。统计分析表明，“颌骨”、“性别”和“牙齿缺失时的年龄组”对所测试的任何变量均无显著影响。牙齿缺失后的时间间隔对“远中牙齿倾斜量”（P<0.001）、“远中牙齿旋转量”（P=0.004）和“间隙关闭”（P=0.038）有显著影响。对“远中牙齿倾斜量”的事后分析显示，牙齿缺失5年后倾斜度显著增加。在本研究的局限性范围内，得出的结论是，在所研究的患者组中，后牙无牙间隙相对或相邻牙齿发生了轻微的位置变化。无牙间隙远中的下颌牙齿记录到最大的位置变化。
