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目的:探讨改良式丝圈式间隙保持器的临床应用效果,并与应用普通丝圈式保持器的效果进行对比。方法:选择36例6.9～10岁乳磨牙过早缺失的患儿,随机分为实验组和对照组,实验组用改良式丝圈式间隙保持器,对照组用普通带环式丝圈间隙保持器。分别从患儿对保持器的接受程度、保持器的制作、椅旁操作时间及保持的疗效进行对比研究,并对测量数据进行统计学处理。结果:两组在保持器的接受程度、保持器的制作以及扩大缺牙间隙方面具有显著性差异;在保持疗效和后继恒牙萌出间隙上有差异,具有显著性。结论:改良式丝圈式间隙保持器在乳磨牙早失后继恒牙萌出间隙不足的治疗保持中是可行的,其矫治效果明显优于常规保持手段,在临床上有极大的应用前景。
OBJECTIVE: To investigate the clinical application of improved wire-wound gap retainers and to compare with the conventional wire-wound retainers. Methods: Thirty-six children with premature absence of deciduous molars from 6.9 to 10 years old were selected and randomly divided into experimental group and control group. The modified wire-wound gap retainer was used in the experimental group, Device. Respectively from the child’s acceptance of the retainer, retainer production, chair side operation time and to maintain the efficacy of comparative study, and the measurement data for statistical analysis. Results: There was a significant difference between the two groups in the degree of cage acceptance, the manufacture of cage and the expansion of missing teeth gap. There was a significant difference between the two groups in maintaining ef fi cacy and the eruption clearance of the subsequent permanent teeth. CONCLUSION: The improved wire-wound gap retainer is feasible in the treatment and maintenance of the missing gap of the permanent teeth after the premature loss of the deciduous molars, and its correction effect is obviously better than the routine maintenance means, which has great clinical application.