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目的探讨下颌第二磨牙C形根管系统的最佳治疗方法。方法选取需要牙髓治疗的下颌第二磨牙500个,拍摄术前X线片,探查根管,确定为C形根管形态和类型160个;随机分二组。一组采用机用镍钛器械ProTabe和小号手用锉预备根管,热牙胶垂直加压充填技术。二组采用对照组采用GG钻加手用不锈钢锉预备根管,冷牙胶侧加压充填技术。根据治疗前后X线片评价根管预备和充填效果,以及两年短期疗效。结果一组80例:恰填,68例;少量糊剂超充4例,超充5例,欠填2例。二组80例:恰填64例,少量糊剂超充7例,超充6例,欠填3例。两年复查一组有3例新的根尖病变,纵折1例。二组有6例新的根尖病变,均为超充病例,根折3例。结论下颌第二磨牙C形根管系统采用机用镍钛器械ProTabe和小号手用锉预备根管,热牙胶垂直加压充填技术充填根管,优于GG钻加手用不锈钢锉预备根管,冷牙胶侧加压充填技术。
Objective To investigate the optimal treatment of C-shaped root canal system of mandibular second molars. Methods 500 mandibular second molars requiring endodontic treatment were selected. The preoperative X-ray films were taken and the root canal was probed. The morphology and type of C-shaped root canal were determined. 160 cases were randomly divided into two groups. A group of machines using nickel-titanium equipment ProTabe and small hand file preparation of root canal, hot teethed vertical filling technology. The two groups using the control group GG drill plus hand stainless steel file preparation for root canal, cold tooth glue side of the pressurized filling technology. According to preoperative and postoperative X-ray evaluation of root canal preparation and filling effect, as well as two-year short-term efficacy. Results A group of 80 patients: just fill, 68 cases; a small amount of paste superficial in 4 cases, 5 cases of superfill, under filling in 2 cases. Two groups of 80 patients: just fill 64 cases, a small amount of paste superficial 7 cases, 6 cases of overfilling, underfilling in 3 cases. A review of two years a group of three new apical lesions, longitudinal fold in 1 case. There were 6 new apical lesions in the two groups, all of which were superfilled and 3 were rooted. Conclusions The C-shaped root canal system of mandibular second molars is prepared with ProTabe machine and small hand file for root canal preparation, and hot gutta-percha filling with vertical pressure filling technique, which is better than GG and hand-made stainless steel file preparation root Tube, cold teethed side pressurized filling technology.