摘要
目的回顾性研究安氏Ⅰ类错畸形在拔牙和不拔牙矫治前后牙弓宽度的改变,并对两种矫治方法所致牙弓宽度改变的差异进行比较分析.方法50例安氏Ⅰ类错畸形患者(25例拔牙矫治,25例不拔牙矫治),记录矫治前后上下牙弓尖牙间和磨牙间牙弓宽度,分别采用配对t检验和两独立样本t检验分析两组内和组间的结果差异.结果矫治前拔牙组和不拔牙组患者上下牙弓尖牙间和磨牙间牙弓宽度均无统计学差异,矫治结束后两组上下牙弓尖牙间牙弓宽度增加有统计学意义,拔牙矫治组上牙弓磨牙间牙弓宽度减少,不拔牙矫治组下牙弓磨牙间牙弓宽度增加无统计学意义,组间比较时上下牙弓尖牙间牙弓宽度改变无统计学意义,但不拔牙组上下牙弓磨牙间牙弓宽度改变比拔牙组显著.结论拔牙矫治和不拔牙矫治安氏Ⅰ类错田畸形均会使牙弓前段宽度增加,拔牙矫治与不拔牙矫治均不会导致牙弓明显缩窄.
Objective Through a review research to analyze Class Ⅰ malocclusion in the extraction and non-extraction teeth treatment before and after treatment arch width changes, and analyze the differences of treatment methods by the two arch width changes. Metohods 50 cases Class Ⅰ malocclusion patients （25 cases extraction treatment, 25 cases of non-extraction treatment） of the information recorded before and after treatment of upper and lower molars and canine, respectively match t-test and two independent samples t-test analysis of the two groups within the group and the result of differences. Results Before treatment Extraction group and non-extraction group, the width of upper and lower molars and the canine dental arch width had no statistical difference, the two groups after the end of treatment, the upper and lower dental arch and the canine arch width increase had the statistical significance, the extraction group, the molar dental arch width reduction, the non-extraction group the lower arch between the molar has no statistically significant increase, the canine width comparison between the upper and lower dental arch had no statistical change significance, but non-extraction group the upper and lower arch change extraction ratio was significant. Conclusion Extraction andnon-extraction treatment of Class Ⅰ malocclusion can increase the width of the previous arch, extraction and non-extraction treatment will not lead to narrow the arch significantly.
出处
《昆明医学院学报》
2008年第3期133-136,共4页
Journal of Kunming Medical College
