抄録
As described before, we developed a fixed partial denture supported by several pins attached to the proximal surfaces of the abutment teeth adjacent to the missing site. In this study, further investigation was carried out concerning 1) the effects of the pretreatment of adherent surfacesof Ti alloy pin, Ti-Ni shape memory alloy pin, and prepared retention hole on the tensile and shearing forces; 2) the effect of the morphological variance of the retentive region of the pin on the tensile and shearing forces; 3) the effect of the luting cement difference on the tensile force. The pin (1.8 mm length) with a doughnut-like structure was luted to the retention hole prepared in extracted teeth with an adhesive resin cement (Panavia 21, Kuraray) and a glassionomer cement (HY-BOND Glassionomer Cement, Shofu) for various adherent surface treatments.
Overall data showed that the combination of the Ti-Ni shape memory alloy pin and the adhesive resin cement improved the retentive force of the pin.
