Generation of retentive force by an electroformed telescope crown on a zirconia inner crown

概要

論文の詳細を見る
This study was performed to evaluate the retentive force generated by an electroformed telescope crown on a zirconia inner crown. The inner crowns were made of zirconia with 2° taper and ten outer crowns were made by electroforming on the inner crown. We measured the retentive force generated between the inner and outer crowns when glycerin solutions of different viscosities replaced saliva during removal of the outer crown of the electroformed telescope. The mean value of the peak retentive force was 6.4 N even with no solution, which was an adequate retentive force. The peak retentive force was significantly greater at glycerin concentrations of 40% and 60% when compared with no solution. Significant increases were observed in the distance over which retentive force was generated, especially after peak retentive force, with water and glycerin solutions compared with no solution. The above findings suggest that the viscosity of saliva effectively increased the retentive force in a 2° electroformed telescope using a zirconia inner crown, and that the electroformed telescope crown on the zirconia inner crown combination was as effective as when the inner crown was made of gold.