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目的:探讨正畸临界病例拔牙与非拔牙治疗其硬组织的长期变化。方法:选取40例牙病患者的病例资料,将其分为对照组与观察组,每组20例;对照组采用正畸临界拔牙治疗,观察组采用非拔牙治疗,比较两组长期变化等。结果:经比较,两组在骨骼变化方面,治疗前、结束时两个阶段,垂直向关系指标MP/SN、An Go Gn、SGo/NMe;在牙齿变化方面,治疗前阶段两组在上下切牙牙轴、唇舌向突度方面;在结束阶段两组在上下切牙位置指标L1/MP、L1/NB、L1-AP、U1-AP、U1/L1方面;在随访阶段,两组患者在下切牙斜度L1/MP、L1/NB方面差异均显著(P<0.05)。结论:临界拔牙非临界拔牙的差异较少。
Objective: To investigate the long-term changes of hard tissues in the critical cases of orthodontics after tooth extraction and non-extraction treatment. Methods: Forty cases of dental diseases were selected and divided into control group and observation group, with 20 cases in each group. The control group was treated by orthodontic tooth extraction, the observation group was treated by non-extraction treatment, and the long-term changes were compared between the two groups. Results: After comparing the two groups, the skeletal changes, the two stages before and after treatment, the vertical relationship between the indicators MP / SN, An Go Gn, SGo / NMe; in the tooth changes, In the end stage, the two groups were located in the upper and lower incisors position index L1 / MP, L1 / NB, L1-AP, U1-AP, U1 / L1; The tooth inclination L1 / MP, L1 / NB differences were significant (P <0.05). Conclusion: The difference of non-critical extraction between critical extraction is less.