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치과 캐드캠 시스템에서 사용되는 고분자 수복재료들의 표면특성과 접착양상

Surface characteristics and bonding performance of polymer restorative materials for dental CAD/CAM systems

대한치과기공학회지 2019년 41권 3호 p.203 ~ 209
김재홍 ( Kim Jae-Hong ) - 부산가톨릭대학교 보건과학대학 치기공학과

김기백 ( Kim Ki-Baek ) - 대전보건대학교 치기공과

Abstract


Purpose: The purpose of this study was to investigate the mechanical properties of polymer prosthetic and restorative materials for dental CAD/CAM using two test method; surface characteristics and shear bond strength.

Methods: Commercialized CAD/CAM polymer blanks were investigated; One kinds of PMMA, and one PEKK blanks. A total of 20 PMMA and PEKK specimens were prepared, and each group was divided into 10 specimens. Average surface roughness was observed under surface profilometer. The contact angle was measured with a surface electrooptics. The bond strength was evaluated by a universal testing machine at a crosshead speed of 5mm/min. The data were statistically analyzed using independent t-test and Fisher’s exact test(P<0.05).

Results: The PMMA and PEKK group showed a significant difference in the shear bond strength with the composite resin(P<0.05). The surface roughness of the PEKK group was higher than that of the PMMA group. The fracture mode were observed in PEKK groups with 50% showing adhesive remnant index score.

Conclusion: PEEK is used as substructure material and composite veneering material is applied. PEKK resins will contribute to the development of successful products that will provide structural and aesthetic satisfaction.

키워드

PMMA(polymethylmethacrylate); PEKK(polyetherketoneketone); Surface roughness; Contact angle; Shear bond strength
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