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3D 프린팅 레진과 임시 수복용 레진의 열순환 처리 후 전단결합강도에 관한 연구

A study on the shear bond strength between 3D printed resin and provisional resin after thermal cycling

신수연|임지훈
대한턱관절교합학회 (Korean academy of stomatognathic function and occlusion)|2021.09|구강회복응용과학지 (Journal of Dental Rehabilitation and Applied Science)|제37권 제3호|pp. 101-110|DOI https://doi.org/10.14368/jdras.2021.37.3.101

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키워드

3D printing3D 프린팅thermal cycling전단결합강도shear bond strength임시 수복용 레진열순환 처리provisional resin
주제분류치의학

초록

목적: 본 연구에서는 3D 프린팅 레진과 임시 수복용 레진의 열순환 처리에 따른 전단결합강도의 변화를 연구하고자 하였다. 연구 재료 및 방법: DLP 방식을 이용하여 3D 프린팅 레진으로 표본을 제작하였다. 표본은 상부에 부착한 임시 수복용레진(PMMA, bis-acryl resin) 및 열순환 처리 횟수(대조군, 2,000, 3,000, 5,000회)에 따라 8개의 군으로 분류하였다. 만능재료시험기 상에서 결합된 표본들의 전단결합강도를 측정하였다. 결과: 열순환 처리의 횟수가 증가함에 따라 3D 프린팅 레진에 대한 PMMA와 bis-acryl resin의 전단결합강도는 PMMA에서 3,000회와 5,000회 간을 제외하고 모두 감소하였다. PMMA 그룹에서는 3,000회 미만의 열순환 처리 횟수 간에서 유의한 전단결합강도의 차이를 보였으며(P < 0.05), 3,000회 이상의 열순환 처리 횟수 간에는 유의한 차이를 보이지 않았다(P > 0.05). Bis-acryl resin 그룹에서는 대조군과 2,000회 간, 대조군과 3,000회 간, 대조군과 5,000회 간의 열순환 처리에는 유의한 전단결합강도의 차이가 있었으며(P < 0.05), 2,000회와 3,000회 간, 3,000회와 5,000회 간에는 유의한 차이가 없었다(P > 0.05). 결론: 3D 프린팅 레진에 대한 임시 수복용 레진의 전단결합강도는 열순환 처리를 한 경우 결합강도가 낮아지는 경향을 보였다.

Abstract

Purpose: In this study, we intended to study the change in bond strength according to the thermal cycling of provisional resin and 3D printed resin for making provisional restoration. Materials and Methods: Through DLP method, 3D printed resin powder was used to produce 3D printed resin samples. The samples were grouped into eight groups, according to types of provisional resin (PMMA, bis-acryl resin) which is to be bonded on the samples and numbers of thermal cycling (control, 2,000, 3,000, 5,000 cycles). Shear bond strength of the bonded samples was measured on the universal testing machine. Results: As the number of thermal cycling increased, the shear bond strength of PMMA and bis-acryl resin for 3D printed resins decreased except between 3,000 cycles and 5,000 cycles in PMMA groups. In the PMMA group, there were significant differences in shear bond strength between less number than 3,000 cycles (P < 0.05) and no significant differences between more number than 3,000 cycles (P > 0.05). In the bis-acryl resin group, there were significant differences in shear bond strength between control and 2,000 cycles, control and 3,000 cycles, and control and 5,000 cycles (P < 0.05), no significant difference between 2,000 and 3,000 cycles, between 3,000 and 5,000 cycles (P > 0.05). Conclusion: The shear bond strength between 3D printed resin and provisional resin tended to decrease after thermal cycling.

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