3D-프린팅 의치상 레진과 열중합 의치상 레진에서의 의치 첨상 재료 간의 전단결합강도 비교 연구
A comparison study on shear bond strength of 3D printed resin and conventional heat-cured denture base resin to denture relining materials
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목적: 다양한 3D 프린팅 의치상 레진과 여러 가지 의치 첨상 재료 간의 전단결합강도를 평가하여 기존의 열중합 의치상 레진과의 전단결합강도를 비교 평가하고자 하였다. 연구 재료 및 방법: 열중합레진(Vertex RS)과 3D프린팅 의치상 레진 두종(DENTCA Denture base II, NextDentTM Base)을 사용하였다. 의치 첨상 재료로는 성분이 다른 총 4종(Tokuyama Rebase II fast, Kooliner, Denture Liner, Denture Liner, Lang Jet Denture Repair Kit)을 사용하여 12개의 군으로 분류하였다. ISO/TS 11405규격에 따라 접착을 시행하였다. 전단결합강도를 측정하였고, 이후 입체현미경과 주사전자현미경을 이용하여 접착 계면을 관찰하고 파절편의 분석을 통하여 파절 양상을 조사하였다. 결과: 3D 프린팅 의치상 레진 군에서 의치 첨상 재료와의 전단결합강도가 열중합레진 군에 비해 유의하게 낮은 전단결합강도 결과를 나타내었다(P < 0.05). Polymethyl methacrylate계열의 첨상재료의 경우, 의치상종류와 관계없이 높은 전단결합강도를 보였다. 파절 양상은 대부분의 군에서 접착성 파절이 나타났고 일부 군에서 응집성 파절과 혼합성 파절 양상이 나타났다. 결론: Polymethyl methacrylate를 주성분으로 하는 의치 첨상 재료가 실험에 사용된 모든 의치상 레진에서 다른 의치 첨상 재료와 비교하여 높은 전단 결합강도 값을 나타내었지만, 직접법으로 의치 첨상을 시행할 경우 단량체로 Isobutyl methacrylate 성분의 의치 첨상재료를 사용하는 것이 전단결합강도면에서 유리할 것으로 사료된다.
Abstract
Purpose: The purpose of this study was to evaluate the shear bond strength of various 3D printed denture base resins and the conventional denture base resin to various denture relining materials. Materials and Methods: For denture base materials, a heat-cured (Vertex RS) and two types of 3D printed DENTCA Denture base II, NextDentTM Base) were used. And 4 types denture relining materials (Tokuyama Rebase II fast, Kooliner, Denture Liner, Denture Liner, Lang Jet Denture Repair Kit) with different components were used. It was classified into 12 groups. Adhesion was performed between the resin base and the relining materials in accordance with ISO/TS 11405 standard. The shear bonding strength was measured, and then the adhesion interface was observed with a stereoscopic microscope and a scanning electron microscope. The fracture pattern was investigated through the analysis of the fragment. Results: In the 3D printed denture resin group, the shear bonding strength with relining materials was significantly lower than that of the heat-cured resin group (P < 0.05). The group of polymethyl methacrylate -based relining materials, high shear bonding strength was shown regardless of the type of denture. As for the fracture pattern, adhesive fracture appeared in most groups, and cohesive, mixed fracture appeared in some groups. Conclusion: The polymethyl methacrylate -based denture relining materials showed high shear bonding strength values compared to other denture relining materials. But, for direct methods, it is considered advantageous in terms of shear bonding strength to use a isobutyl methacrylate-based denture relining materials.
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