Affiliation:
1. Department of Oral and Maxillofacial Implantology, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka 238-8580, Japan
2. Division of the Dental Practice Support, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka 238-8580, Japan
Abstract
Polylactic acid (PLA) has gained considerable attention as an alternative to petroleum-based materials due to environmental concerns. We fabricated implant models with fused filament fabrication (FFF) 3D printers using PLA, and the accuracies of these PLA models were compared with those of plaster models made from silicone impressions and resin models made with digital light processing (DLP). A base model was obtained from an impact-training model. The scan body was mounted on the plaster, resin, and PLA models obtained from the base model, and the obtained information was converted to stereolithography (STL) data by the 3D scanner. The base model was then used as a reference, and its data were superimposed onto the STL data of each model using Geomagic control. The horizontal and vertical accuracies of PLA models, as calculated using the Tukey–Kramer method, were 97.2 ± 48.4 and 115.5 ± 15.1 μm, respectively, which suggests that the PLA model is the least accurate among the three models. In both cases, significant differences were found between PLA and gypsum and between the PLA and resin models. However, considering that the misfit of screw-retained implant frames should be ≤150 µm, PLA can be effectively used for fabricating implant models.
Subject
General Materials Science
Reference79 articles.
1. A Brief Historical Perspective on Dental Implants, Their Surface Coatings and Treatments;Abraham;Open Dent. J.,2014
2. Immediate Occlusal Loading of Brånemark Implants Applied in Various Jawbone Regions: A Prospective, 1-Year Clinical Study;Glauser;Clin. Implant. Dent. Relat. Res.,2001
3. Early loading of non-submerged titanium implants with a sandblasted and acid-etched surface. 5-year results of a prospective study in partially edentulous patients;Bornstein;Clin. Oral Implant. Res.,2005
4. Bone density at implant sites and its relationship to assessment of bone quality and treatment outcome;Bergkvist;Int. J. Oral Maxillofac. Implant.,2010
5. Enhanced implant stability with a chemically modified SLA surface: A randomized pilot study;Oates;Int. J. Oral Maxillofac. Implant.,2007