两种口内直接法制作铸造桩核方法的临床研究比较

Comparative study of making casting post by two direct methods

目的比较富士快速自凝树脂口内直接法与嵌体蜡口内直接法制作铸造桩核的临床效果。方法选取本科门诊患者203例,共316颗患牙根管治疗后随机分成2组,分别用富士快速自凝树脂口内直接法与嵌体蜡口内直接法制作铸造桩核。对2组制作法的代型制取时间、就位情况、密合度以及固位效果等进行比较。结果富士快速自凝树脂口内直接法组制作的桩核155颗成功,成功率98.1%;嵌体蜡口内直接法组制作的铸造桩核124颗,成功率78.5%,经χ2检验两组间的差异有显著统计学意义(χ2=29.417,P<0.01)。结论采用富士快速自凝树脂口内直接法制作铸造桩核的临床操作时间短且适合性好,值得推广应用。

Objective To compare the clinical effect of two methods to make casting post impression. Methods 203 patients who have 316 residual crowns/residual roots after R. C. T were randomly put into two groups. Cast posts were made in the cavity of the two groups by using GC Unifast Trad methods and inlay wax methods respectively. Operating time, emplacement, compactness and retention were compared. Results 155 posts（98. 1%）were made successfully through GC Unifast Trad methods while 124 posts（78.5%） through inlay-wax methods. The difference between the two groups has a statistic significance （X^2=29. 417,P〈0. 01）. Conclusion The clinical effect of casting post made through GC Unifast Trad is better than that made through inlay-wax method and is expected to be extensively applied.