한국산업융합학회 논문집 (Journal of the Korean Society of Industry Convergence)

  • 제27권5호
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  • Pages.1167-1174
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  • 2024
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  • 1226-833X(pISSN)
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  • 2765-5415(eISSN)
한국산업융합학회 (The Korean Society of Industry Convergence)
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적층 두께 및 출력 각도가 수리된 3D 프린팅 의치상 레진의 굴곡강도와 표면 거칠기에 미치는 영향

Influence of Layer Thickness and Build Angle on the Flexural Strength and Surface Roughness of Repaired 3D-Printed Denture Base Resin

  • 최재원 (부산가톨릭대학교 치기공학과)
  • Jae-Won Choi (Dept. of Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
  • 투고 : 2024.08.25
  • 심사 : 2024.10.02
  • 발행 : 2024.10.31
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초록

The purpose of this study was to evaluate the effects of various layer thicknesses and build angles on the flexural strength and surface roughness of repaired 3D-printed denture base resin. 3D-printed bar-shaped specimens with a 45° bevel were fabricated according to layer thickness(50 ㎛ and 100 ㎛) and build angle(0-degree, 45-degree, and 90-degree). Denture relining resin was applied to the 2 mm repair area Flexural strength was measured by a three-point bending test using a universal testing machine, and surface roughness(Ra) and surface topography were observed using a digital optical microscope at ×500 magnification. Statistical significance was analyzed using two-way ANOVA, one-way ANOVA, and Games-Howell post hoc(α = .05). Except for the 90-degree group, the group with a layer thickness of 100 ㎛ showed better flexural strength values than the group with a layer thickness of 50 ㎛(p < .05). Additionally, within the same layer thickness, the 45-degree group showed the lowest flexural strength value. The Ra values of the 0-degree and 90-degree groups, where the build angle was 45° to the layer orientation, were higher at 100 ㎛ than at 5 0 ㎛ layer thickness(p < .05), and the Ra value of the 45-degree group, where the build angle was parallel to the layer orientation, was lower than those of other build angles(p < .05). Layer thickness and build angle significantly affected the surface roughness of 3D-printed denture base resin, and the surface roughness was confirmed to be closely related to the bonding strength with denture relining resin.

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참고문헌

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