磁力牵引矫正埋伏牙的疗效观察

Effect of magnetic-orthodontic extrusion on impacted teeth

目的探讨磁力牵引在埋伏牙治疗中的应用价值。方法选择2008年4月至2012年4月在盐城市妇幼保健医院和盐城市三院口腔科就诊的36例患者作为研究对象。上颌尖牙埋伏阻生29例,上颌中切牙埋伏阻生7例;36例埋伏牙均无萌出能力。将36例埋伏牙患者随机分为两组:A组(外科手术联合固定矫治器组),行外科开窗术联合固定矫治器治疗;B组(外科手术联合磁力牵引组)行外科开窗术联合磁力牵引治疗。观察比较两组治疗后阻生牙的破龈时间、入列时间,萌出状况,牙髓活力及患者痛苦程度。结果 A组患者埋伏牙的平均破龈时间与平均入列时间均少于B组,但无统计学差异(P>0.05)。A组患者治疗后牙髓活力检测均正常,未见根尖吸收和粘连,但牵引部位牙龈及唇组织牵引压迫痕迹明显,患者感觉牵引部疼痛,进食,说话等唇运动时疼痛加剧。B组患者治疗后牙髓活力检测均正常,未见根尖吸收和粘连,牵引部位无感染,牙龈及唇组织无异常,患者无痛苦感觉。结论外科手术联合磁力牵引用于埋伏牙的治疗,虽然治疗时间略长,但患者痛苦小,牵引力柔和更易于接受,具有广泛的应用前景。

Objective To investigate the effect of magnetic-orthodontic extrusion on impacted teeth and its potential value. Methods36 patients who received dental treatment in our hospitals from April 2008 to April 2012 were chosen as the study subjects with 29 impacted maxillary canines and 7 impacted maxillary central incisors. 36 patients were then randomly divided into two groups： Group A（ surgical joint fixedappliance） which underwent a surgical fenestration joint fixed appliance therapy and Group B（ surgerycombinedmagnetictraction） which underwent a surgical fenestration combining magnetic traction therapy. Gingival-breaking time,into the column time,the eruption of the situation,pulp and degree of patient pain of two groups were observed. Results Compared with Group B,the average gingival-breaking time and into the column time of Group A were less,but the difference was not statistically significant（ P〈0. 05）. Pulp vitality tests were normal in group A without root resorption and adhesion,but the traction parts of the gums and lips had obvious traction oppression signs,and patients felt haulage pain when doing such lip movements as speaking and eating. Pulp vitality tests were normal in group B without root resorption and adhesion,and there were no infections in the traction parts and no abnormalities in the gums and lips and the patients felt no pain. Conclusions Although the treatment time is slightly longer,surgical fenestration combining magnetic traction therapy has broad application prospects in treatment of the impacted teeth due to its gentle traction and less pain.