短桩钉嵌体冠修复短冠磨牙的临床效果观察

目的探讨短桩钉嵌体冠修复的适应证和修复方法,观察短桩钉嵌体冠修复短冠磨牙的临床意义。方法对270颗经完善根管治疗的合龈距<4mm的短冠磨牙,随机分为3组,A组:短桩钉嵌体冠修复;B组:常规桩钉预备的嵌体冠修复;C组:对照组不作桩钉预备的利用髓腔固位的嵌体冠修复,每组90颗,定期复查,随访观察2～5年,评价修复效果。结果 270颗磨牙经嵌体冠修复治疗后获得满意效果,个别病例出现牙龈炎和或边缘不密合的情况。A组和B组修复效果明显高于C组,(分别为P<0.01和P<0.05)有显著差异性;A组和B组修复效果比较,(P>0.05)没有显著性差异。表明两组不同桩长度的嵌体冠修复效果并无统计学意义,且均优于不做桩钉预备的髓腔固位组。结论短桩钉嵌体冠修复合龈距过低磨牙是一种简单易行,经济实惠,效果良好的修复方法,值得临床推广应用。

Observation of clinical effect of the short crown molars with short-post inlay-crown restoration

Objective To investigate the indications and restorative applications of a short-post inlay-crown restoration,and to observe the clinical significance of the short crown molar restoration using a short-post inlay-crown.Methods 270 endodontic-treated molars with an occlusogingival distance less than 4mm（i.e.the short crown molar） were randomly divided into the followingthree groups： Group A-short-post inlay-crown restoration;Group B conventional post inlay-crown restoration;and Group C-inlay-crown restoration with pulp chamber retention.All cases were followed up regularly from two to five years.Results The clinical outcome of 270 molars with inlay-crown restorations was satisfactory.However,gingivitis and/or the lack of edge adhesion was observed in a few cases.The prosthetic effect of Group A and Group B was significantly better than Group C（P0.01 and P0.05,respectively）.No significant differences in the prosthetic effects between Groups A and B was found（P0.05）.The two groups of inlaycrowns with different lengths of post presented a similar prosthetic effect,and were both better than those in Group C subjects with inlay-crown restorations with pulp chamber retention.Conclusion The short-post inlay-crown restoration seems to be a simple,affordable and reliable method to restore short crown molars.