摘要
目的 分析上颌腭侧埋伏阻生中切牙的正畸矫治效果及导杆式矫治器的治疗作用.方法 利用导杆式矫治器治疗7例上颌单侧中切牙腭侧埋伏的患牙,以对侧自然萌出中切牙作为对照.矫治前后拍摄全景片,测量矫治后埋伏牙和对照牙的牙全长、解剖牙根长度、解剖牙冠长度、根长/冠长,用SPSS 17.0软件进行成组t检验.结果 6例腭侧埋伏中切牙经牵引萌出后排齐,牙髓和牙周状况良好.萌出后埋伏牙解剖牙根长度比对照组牙根短4.00 mm（P=0.020）,根长/冠长值平均为1.36±0.31,小于对照组（P=0.048）.其中1例因埋伏牙骨粘连,牵引16个月后无移动而放弃牵引.结论 矫治后腭侧埋伏中切牙有足够的长度,应保留埋伏牙；导杆式矫治器是治疗上颌腭侧埋伏中切牙的一种有效方法.
Objective To analyze the effects and features of guide rod appliance on palatal impacted central incisors. Methods 7 palatal impacted central incisors were treated with guide rod appliance, the normal erupted contralateral central incisors were used as control. Pre-and Posttreatment panoramic radiograph were measured and the following data were collected： （1） The length of the impacted central incisors and the contralateral control teeth; （2） The length of the anatomical roots; （3） The length of the anatomical crowns; （4） Root/Crown length ratio. The measures were compared using two sample t-test with SPSS17.0. Results Six impacted central incisors were treated to normal position. Their pulp and periodontal attachment were normal. The length of the impacted central incisors was 4. 00 mm shorter than the control group （P：0. 020）. The ratio of Root/Crown length is 1. 36 ± 0. 31, which is smaller than that of the control group （P =0. 048）. One tooth demonstrated ankylosis for that 16 months of orthodontic extrusion showed no movement and gave up treatment. Conclusions The length of the impacted tooth＇s root was acceptable after treatment. The guide rod aDDliance is an effective method to treat oalatal impacted central incisors.
出处
《中华口腔正畸学杂志》
2013年第2期73-76,共4页
Chinese Journal of Orthodontics
基金
2010年浙江省公益性技术应用研究计划（2010C33124）
2010年浙江省大学生科技创新活动计划（新苗人才计划）（2010R413029）
关键词
导杆式矫治器
埋伏牙
中切牙
Guide rod appliance
Impacted tooth
Central incisors
