Abstract:

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.

Key words: Cast metal post-core, Amalgam post-core, Molar