COMPARISON OF RETENTIVE FORCES OF TEMPORARY CEMENTS AND ABUTMENT HEIGHT USED WITH IMPLANT-SUPPORTED PROSTHESES
이동희, 류재준, 서규원,
소속 상세정보
이동희 ( Lee Dong-Hee ) - 고려대학교 치과대학 보철학교실
류재준 ( Ryu Jae-Jun ) - 고려대학교 대학원 치과학교실
서규원 ( Suh Kyu-Won ) - 고려대학교 대학원 치과학교실
KMID : 0362420080460030280
Abstract
Statement of Problem: Recent data regarding the effects the cement type and abutment heights on the retentive force of a prosthetic crown are inconsistent and unable to suggest clinical guidelines.
Purpose of the study: This study evaluated the effects of different types of temporary cements and abutment heights on the retentive strength of cement-retained implant-supported prostheses.
Materials and Methods: Prefabricated implant abutments, 4 mm in diameter, 8?taper per side, and light chamfer margins, were used. The abutment heights of the implants were 4 mm, 5.5 mm and 7 mm. Seven specimens of a single crown similar to a first premolar were fabricated. Six commercially available temporary cements, TempBond, TempBond NE, Cavitec, Procem, Dycal, and IRM, were used in this study. Twenty-four hours after cementation, the retentive strengths were measured using a universal testing machine with a crosshead speed of 0.5 mm/min. The cementation procedures were repeated 3 times. The data was analyzed using two-way analysis of variance and a Tukey test (α=0.05).
Results: The tensile bond strength ranged from 1.76 kg to 19.98 kg. The lowest tensile strengths were similar in the TempBond and Cavitec agents. Dycal showed the highest tensile bond strength (P<0.01). More force was required to remove the crowns cemented to the long abutments (P<0.05).
Conclusion: TempBond and Cavitec agents showed the lowest mean tensile bond strength. The Dycal agent showed more than double the tensile bond strength of the TempBond agent.
키워드
Dental implantation;Dental cements;Dental abutments;Tensile strength
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