대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)

  • 제41권4호
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  • Pages.466-475
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  • 2003
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  • 0301-2875(pISSN)
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  • 2005-3789(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
권호 표지

시멘트 유지형 임플란트 보철물의 유지력에 시멘트의 종류와 열순환이 미치는 영향에 관한 연구

EFFECTS OF VARIOUS CEMENTS AND THERMOCYCLING ON RETENTIVE STRENGTHS OF CEMENTED IMPLANT-SUPPORTED PROSTHESES

  • 조재호 (부산대학교 치과대학 보철학교실) ;
  • 정창모 (부산대학교 치과대학 보철학교실) ;
  • 전영찬 (부산대학교 치과대학 보철학교실)
  • Cho Jae-Ho (Department of Prosthodontics, College of Dentistry, Pusan National University) ;
  • Jeong Chang-Mo (Department of Prosthodontics, College of Dentistry, Pusan National University) ;
  • Jeon Young-Chan (Department of Prosthodontics, College of Dentistry, Pusan National University)
  • 발행 : 2003.08.01
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초록

Statement of problem : In cemented implant-supported porstheses, it is still controversy what kind of cement to use. However, the effect of thermocycling on retentive strength of cemented implant-supported prostheses has not been well investigated. Purpose : This study was tested to evaluate the effects of various cements and thermocycling on retentive strengths of cemented implant-supported prostheses. Material and methods : Prefabricated implant abutments, height 5mm, diameter 6mm, 3-degree taper per side, with light chamfer margins were used. Ten specimens of two-unit fred partial denture were fabricated. The luting agents used for this study were three provisional luting agents which were Temp bond, Temp bond NE, IRM and four permanent luting agents which were Panavia F, Fuji-cem, Hy-bond Zinc cement, Hy-bond Polycarboxylate cement. 24 hours after cementation. the retentive strengths were measured by the universal testing machine with a cross-head speed of 0.5mm/min. Then cementation procedures were repeated and specimens were thermocycled 1000 times at temperature of $5^{\circ}C$ and $55^{\circ}C$. After thermocycling, the retentive strengths were measured. Results : Before thermocycling, the retentive strengths were decreased with the sequence of Panavia F. Fuji-cem. Hy-bond Zinc cement. Hy-bond Polycarboxylate cement, IRM, Temp bond NE and Temp bond, and there were significant differences among each groups(p<0.05). After thermocycling, the retentive strengths were decreased with the sequence of Panavia F. Fuji-cem, Hybond Zinc cement, Hy-bond Polycarboxylate cement, IRM, Temp bond NE and Temp bond, and there were no significant differences among Panavia F, Fuji-cem and Temp bond NE, Temp bond(p>0.05). The retentive strengths before and after thermocycling showed significant differences in Hy-bond Zinc cement. IRM, Temp bond NE and Temp bond(p<0.05). Conclusion : Within the limitation of this study, thermocycling do not affect the retentive strengths of permanent luting agents but the retentive strengths of temporary cements were reduced significantly after thermocyling.

키워드

참고문헌

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