CAJ | 학술논문

目的:观察平面导板、预成镍钛摇椅弓、多用途唇弓三种方法压低下切牙对牙根尖吸收的影响.方法:102例经过直丝弓矫治的青少年非拔牙矫治深覆牙合病例,分别用平面导板、预成镍钛摇椅弓、多用途唇弓三种方法压低下切牙纠正深覆牙合,并在全颌曲面断层片上观察矫治前后的牙根尖吸收情况.结果:采用三种方法矫治前后的统计结果P <0.01,矫治三种方法之间比较 P <0.01,说明三种压低下切牙的方法均会造成或加重牙根的吸收,不同的方法引起牙根吸收的程度有差异.结论:不同方法压低下切牙会引起不同程度的牙根吸收.使用平面导板压低下切牙比使用摇椅弓和多用唇弓会引起更明显的牙根吸收.
목적:관찰평면도판、예성얼태요의궁、다용도진궁삼충방법압저하절아대아근첨흡수적영향.방법:102례경과직사궁교치적청소년비발아교치심복아합병례,분별용평면도판、예성얼태요의궁、다용도진궁삼충방법압저하절아규정심복아합,병재전합곡면단층편상관찰교치전후적아근첨흡수정황.결과:채용삼충방법교치전후적통계결과P <0.01,교치삼충방법지간비교 P <0.01,설명삼충압저하절아적방법균회조성혹가중아근적흡수,불동적방법인기아근흡수적정도유차이.결론:불동방법압저하절아회인기불동정도적아근흡수.사용평면도판압저하절아비사용요의궁화다용진궁회인기경명현적아근흡수.
Objective:The purpose of this study was to explore the root resorption of depressing lower incisorsn by the flat bite plate,preshaped nickel titanium rocking chair archwire,utility arch. Method:102 adolescent patients with deep overbite were treated by straight wire appliance and non-tooth extraction,and corrected deepbite by three ways to depress the lower incisors. Root resorption of all patients was observeded before and after treatment. Result:The statistical results before and after treatment of three ways was statistically significant,illustrate that the root resorption was caused or aggravat-ed by three ways when depress the lower incisors. Conclusion:The different treatment methods depressing the lower incisors can cause varying degrees of root resorption. Depressing the lower incisors by flat bite plate cause more root resorption than preshaped rocking chair archwire and utility arch.