Comparison of adaptation and microstructure of titanium upper complete denture base fabricated by selecting laser melting and electron beam melting
10.3760/cma.j.issn.1002-0098.2017.06.005
- VernacularTitle: 选区激光熔化和电子束熔化制作上颌全口义齿钛合金基托适合性及微观结构的比较
- Author:
Ye YE
1
;
Yaoyang XIONG
1
;
Jiarui ZHU
2
;
Jian SUN
1
Author Information
1. Department of Prosthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
2. Department of Prosthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China [Present address: Department of Stomatology, Kashgar Prefecture Second People's Hospital, Xinjiang Uygur Autonomous Region 844000, China]
- Publication Type:Journal Article
- Keywords:
Denture, complete, upper;
Denture bases;
Titanium;
Three-dimensional printing
- From:
Chinese Journal of Stomatology
2017;52(6):346-350
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To fabricate Ti alloy frameworks for a maxillary complete denture with three-dimensional printing (3DP) technique, such as selective laser melting (SLM) and electron beam melting (EBM), and to evaluate the microstructure of these frameworks and their adaptation to the die stone models.
Methods:Thirty pairs of edentulous casts were divided into 3 groups randomly and equally. In each group, one of the three techniques (SLM, EBM, conventional technique) was used to fabricate Ti alloy frameworks. The base-cast sets were transversally sectioned into 3 sections at the distal of canines, mesial of first molars, and the posterior palatal zone. The gap between the metal base and cast was measured in the 3 sections. Stereoscopic microscope was used to measure the gap. Three pieces of specimens of 5 mm diameter were fabricated with Ti alloy by SLM, EBM and the traditional casting technology (as mentioned above). Scanning electron microscope (SEM) was used to evaluate the differences of microstructure among these specimens.
Results:The gaps between the metal base and cast were (99.4±17.0), (98.2±26.1), and (99.6± 16.1) μm in conventional method; (99.4 ± 22.8), (83.1 ± 19.3), and (103.3 ± 13.8) μm in SLM technique; (248.3±70.3), (279.1±71.9), and (189.1±31.6) μm in EBM technique. There was no statistical difference in the value of gaps between SLM Ti alloy and conventional method Ti alloy group (P>0.05). There was statistical difference among EBM Ti alloy, conventional method Ti alloy and SLM Ti alloy group (P<0.05). The SLM Ti alloy showed more uniform and compact microstructure than the cast Ti alloy and EBM Ti alloy did.
Conclusions:SLM technique showed initial feasibility to manufacture the dental base of complete denture. The mechanical properties and microstructure of the denture frameworks prepared by SLM indicate that these dentures are appropriate for clinical use. EBM technique is inadequate to make a complete denture now.
