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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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This case report presents the clinical application of dental polylactic acid (PLA) interim prosthesis fabricated by fused deposition modeling (FDM) 3D printer and evaluates its clinical applicability as a substitute for conventional materials such as acrylic resin. FDM printed PLA interim prosthesis was applied in each case of the 3-unit bridge and the single crown in the maxillary posterior and mandibular posterior regions. After 10~14 days of short-term intraoral use, there was no deformation or fracture of the prosthesis and dissolution of the cement, and the patients were satisfied with the PLA prosthesis. The dimensional accuracy and flexural strength of PLA prosthesis are clinically acceptable for short-term use. However, due to surface roughness, esthetics can be reduced and plaque deposition can occur, requiring post-printing glazing and subsequent post-curing processes. The suitable polishing method for PLA prosthesis is currently unknown. Further study of output conditions such as nozzle diameter or layer thickness is required to print smooth surfaces, and increasing the heat resistance of the material to facilitate polishing can also be an improvement. FDM printed PLA interim prosthesis is noteworthy in a way that overcomes the disadvantages of polymerization shrinkage, marginal gap formation, tissue irritation of monomer, and patient discomfort that occur in the intraoral direct method using polymethyl methacrylate (PMMA), a conventional material. Glazing liquid application is necessary to enhance surface roughness.
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