지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.6
- 수록면
- 13 - 19 (7page)
이용수
초록· 키워드
오류제보하기
Purpose: The aim of this study was to compare the flexural strength of provisional fixed dental prostheses which was three-dimensional (3D) printed by several build directions.
Materials and Methods: A metal jig with two abutment teeth and pontic space in the middle was fabricated. This jig was scanned with a desktop scanner and provisional restoration was designed on dental computer-aided design program. On the preprocessing software, the build angles of the restorations were arranged at 0°, 30°, 45°, 60°, and 90° and support was added and resultant structure was sliced to a thickness of 100 μm. Processed restorations were printed with digital light processing type 3D printer using poly methyl meta acrylate–based resin. After washing and post-curing, compressive loading was applied at a speed of 1 mm/min on a metal jig fixed to a universal testing machine. The maximum pressure at which fracture occurred was measured. For the statistical analysis, build direction was set as the independent variable and fracture strength as the dependent variable. One-way analysis of variance and Tukey’s post hoc analysis was conducted to compare fracture strength among groups (α=0.05).
Result: The mean flexural strength of provisional restoration 3D printed with the build direction of 0° was 1,053±168 N; it was 1,183±188 N at 30°, 1,178±81 N at 45°, 1,166±133 N at 60°, and 949±170 N at 90°. The group with a build direction of 90° showed significantly lower flexural strength than other groups (P＜0.05). The flexural strength was significantly higher when the build direction was 30° than when it was 90° (P＜0.01).
Conclusion: Among the build directions 0°, 30°, 45°, 60°, and 90° set for 3D printing of fixed dental prosthesis, an orientation of 30° is recommended as an effective build direction for 3D printing.
Materials and Methods: A metal jig with two abutment teeth and pontic space in the middle was fabricated. This jig was scanned with a desktop scanner and provisional restoration was designed on dental computer-aided design program. On the preprocessing software, the build angles of the restorations were arranged at 0°, 30°, 45°, 60°, and 90° and support was added and resultant structure was sliced to a thickness of 100 μm. Processed restorations were printed with digital light processing type 3D printer using poly methyl meta acrylate–based resin. After washing and post-curing, compressive loading was applied at a speed of 1 mm/min on a metal jig fixed to a universal testing machine. The maximum pressure at which fracture occurred was measured. For the statistical analysis, build direction was set as the independent variable and fracture strength as the dependent variable. One-way analysis of variance and Tukey’s post hoc analysis was conducted to compare fracture strength among groups (α=0.05).
Result: The mean flexural strength of provisional restoration 3D printed with the build direction of 0° was 1,053±168 N; it was 1,183±188 N at 30°, 1,178±81 N at 45°, 1,166±133 N at 60°, and 949±170 N at 90°. The group with a build direction of 90° showed significantly lower flexural strength than other groups (P＜0.05). The flexural strength was significantly higher when the build direction was 30° than when it was 90° (P＜0.01).
Conclusion: Among the build directions 0°, 30°, 45°, 60°, and 90° set for 3D printing of fixed dental prosthesis, an orientation of 30° is recommended as an effective build direction for 3D printing.
목차
Introduction
Materials and Methods
Result
Discussion
Conclusion
References
참고문헌 (17)
참고문헌 신청
Atzeni E / 2012 / Economics of additive manufacturing for end-usable metal parts / Int J Adv Manuf Technol 62:1147~1155
Frazier WE / 2014 / Metal additive manufacturing: a review / J Mater Eng Perform 23:1917~1928
van Noort R / 2012 / The future of dental devices is digital / Dent Mater 28:3~12
Park JY / 2016 / In vitro assessment of the marginal and internal fits of interim implant restorations fabricated with different methods / J Prosthet Dent 116:536~542
Fernandes N / 2016 / Reconstruction of an extensive midfacial defect using additive manufacturing techniques / J Prosthodont 25:589~594
Frazier WE / 2014 / Metal additive manufacturing: a review / J Mater Eng Perform 23:1917~1928
van Noort R / 2012 / The future of dental devices is digital / Dent Mater 28:3~12
Park JY / 2016 / In vitro assessment of the marginal and internal fits of interim implant restorations fabricated with different methods / J Prosthet Dent 116:536~542
Fernandes N / 2016 / Reconstruction of an extensive midfacial defect using additive manufacturing techniques / J Prosthodont 25:589~594
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UCI(KEPA) : I410-ECN-0101-2019-515-000901749