摇椅形镍钛圆丝和方丝唇弓打开咬合前后下颌牙的三维变化  

Three dimensional changes of lower teeth with NiTi round or square rocking chair archwire

作　　者：谢琳[1,2] 陈磊[2] 张丽娜[1] 高慧[1] 张君[1,3] 

机构地区：[1]山东大学口腔医学院,山东济南250012 [2]山东省淄博市临淄区人民医院口腔科,山东淄博255400 [3]山东省口腔生物医学重点实验室,山东济南250012

出　　处：《上海口腔医学》2012年第1期66-72,共7页Shanghai Journal of Stomatology

基　　金：山东省科学技术发展计划项目(2010GWZ20255)~~

摘　　要：目的:比较摇椅形镍钛圆丝和方丝唇弓矫治安氏Ⅰ类或安氏Ⅱ类错伴深覆患者牙列时,下颌牙在三维方向上的变化,为临床选择不同类型的弓丝提供依据。方法:按标准选择40例病例,依据所使用的镍钛弓丝截面形态、尖牙向后"8"字结扎、唇弓末端回弯等不同,将研究对象分为4组。打开咬合前、后留取患者石膏模型,用激光扫描仪和图像处理软件Imageware扫描处理石膏牙模型,建立数字化研究模型,测量下颌牙的三维变化。应用SPSS12.0软件包对数据进行统计学分析。结果:摇椅形唇弓打开咬合时,会导致牙三维方向上的诸多变化,包括①下颌磨牙区牙弓宽度略增加,尖牙区和第二前磨牙区牙弓宽度变化不明显,牙弓长度有增加趋势。②下切牙龈向压低,唇侧倾斜;使用镍钛方丝及不作末端回弯、"8"字结扎时切牙唇倾较明显。尖牙向远中移动,向后"8"字结扎时移动明显,龈向变化不明显。第二前磨牙向升高;第一磨牙远中颊尖龈向压低,近中颊尖变化不明显,牙有向远中移动的趋势;使用镍钛方丝时,出现颊倾。结论:使用摇椅形唇弓打开咬合时,应用截面形态不同的镍钛圆丝或方丝及弓丝末端是否回弯和尖牙是否向后"8"字结扎,在下颌牙产生的三维变化有一定差异。PURPOSE： To observe the three-dimensional change of lower arch when NiTi round and square rocking chair archwire was used to open overbite in patients of Angle ClassⅠor ClassⅡ with deep overbite,in order to providing experimental basis for clinicians.METHODS： Forty patients were chosen according to the inclusion standard.The patients were divided into four groups according to different archwire and with or without use of lace back and cinch back.The patients were taken plaster model before and after the overbite opened by using typical swinging chair labial arch.Laser scan and imageware software were used to make digital model and measure the three dimensional changes of the lower teeth.All data were analyzed with SPSS 12.0 software package.RESULTS：When Rocking chair archwire was used to open overbite,it made the teeth changed in three dimensions,but the arch shape changed unconspicuously.The width between molars increased while the width between the canines and premolars had little change.The arch length had a tendency to increase and the incisors were intruded and had the tendency of labioclination,the incisor labioclination was more significant with lace back and cinch back.The canines showed the tendency of apical clination and there were obvious changes with the lace back and cinch back,the intruding-extruding change was not obvious.The second premolars were elevated,and the mesio-buccal cusp of the first molar did not move while the apo-buccal cusp was intruded.The first molars have the tendency of distal movement and lingual movement when using NiTi square wire.CONCLUSIONS： In the process of opening overbite using rocking chair labial arch,there are different three-dimensional changes of the mandibular arch with NiTi round or square archwire,with or without lace back and cinch back.

关 键 词：摇椅 镍钛圆丝 镍钛方丝 三维变化 打开咬合 

分 类 号：R783.5[医药卫生—口腔医学]