目的

探讨全银汞桩核与铸造金属桩核用于磨牙根管治疗后的修复效果。

方法

对20 例采用全银汞桩核修复、20 例采用铸造金属桩核修复的磨牙进行6 个月到12 个月的临床追踪，X 线片检查桩核与牙体的适合性，观察其临床疗效。

结果

X 线牙片检查显示，20 例全银汞桩核与根管内壁、根尖方向的牙胶之间结合紧密、无暗影，根尖孔处封闭良好；20 例铸造金属桩核患者中，有2 例（下颌第一及第二磨牙各1 例）X 线牙片检查显示铸造金属桩尖端与牙胶间有约2 mm 间隙，根尖区见低密度影；1 例患者X 线牙片检查显示远中根管侧穿，根分歧区见低密度影；其余17 例X 线牙片检查显示铸造桩与根管内壁、根尖方向的牙胶间结合紧密、无暗影，根尖孔处封闭良好。

结论

全银汞桩核用于牙体缺损较严重的磨牙，较铸造金属桩核修复更安全可靠。

Objective

To compare the clinical performance of amalgam post and cast metal post in molars after root canal therapy， and evaluate the effectiveness.

Methods

Twenty molars were restored with amalgam post， while another 20 with cast metal post. Patients were followed up for 6 ～12 months. Marginal adaptability between post and tooth was by X-ray and the treatment effectivenes was assessed.

Results

Radiograph indicated that all 20 amalgam post and 17 cast post fit well with root canal inner wall and radical gutta-percha. The sealing at the apical area was good. There was 2 mm space between post and gutta-percha in 2 cases restored cast post， accompanying with low-density radio-opacity in peri-apical area. Distal root perforation was found in 1 case， with low-density radio-opacity at root furcation zone.

Conclusion

Amalgam post and core technique is safer and more efficient than cast metal post in restoring molars with extensive destruction.