|
|||||
|
|
Adhesion of porcelain to three-dimensionally printed and soft milled cobalt chromium |
|
| Affiliation: | 1. Department of Medical System Engineering, Division of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima 734-8553, Japan;2. Translational Research Center, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima 734-8553, Japan;3. Graduate School of Engineering, Hiroshima University, 1-3-2 Kagamiyama, Higashi-hiroshima 739-0046, Japan;1. Department of Clinical and Experimental Medicine, School of Dentistry, University of Foggia, Foggia, Italy;2. Sintesi Sud Srl, Ariano Irpino, AV, Italy;3. Salus Oris Srl, Vallesaccarda, AV, Italy;1. W White Dental Clinic, 17, Teheran-ro 87-gil, Gangnam-gu, Seoul, 06169, Republic of Korea;2. Doctorplant Dental Clinic, 885 Gyeongin-ro, Yeogdeungpo-gu, Seoul, 07303, Republic of Korea;3. Obokmanse Dental Clinic, 20, Digital-ro 31-gil, Guro-gu, Seoul, 08380, Republic of Korea;4. Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea;1. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, 56 Lingyuan West Road, Guangzhou 510055, China;2. Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Minneapolis 55455, USA;3. State Key Laboratory of Military Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi’an 710032, China;1. Division of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Graduate School, Japan;2. Division of Physiology, Kyushu Dental University, Japan;1. Division of Clinical Oral Rehabilitation, The Nippon Dental University, Graduate School of Life Dentistry, 1-9-20, Fujimi, Chiyoda, Tokyo 102-0071, Japan;2. Division of Rehabilitation for Speech and Swallowing Disorders, The Nippon Dental University, Tama Oral Rehabilitation Clinic, 4-44-19, Koganei, Tokyo 184-0011, Japan |
| Abstract: | PurposeTo investigate the adhesion strength and bonding interface of layered porcelain to powdered cobalt–chromium (CoCr) processed by two different computer-aided manufacturing methods.MethodsSixteen specimens were manufactured from each of Three-dimensionally -printed/laser-sintered (LS) CoCr and milled pre-sintered (SM) CoCr. The specimens were layered with porcelain and 4-point bending was carried out. Nanoindentation was used to calculate changes in elastic modulus and hardness before and after porcelain firing along with adhesion energy. Fracture surface and microstructural changes were examined before and after porcelain firing observed using scanning electron microscopy.ResultsThe adhesion energy of the LS specimens bonded porcelain were higher than the SM specimens (P < 0.05). Analysis of the fracture surfaces showed a predominantly adhesive mode of failure. Elastic-modulus and hardness of the CoCr specimens increased post porcelain firing. Examination using electron-backscatter diffraction (EBSD) showed a fine grain structure for both manufacturing methods. Significant localized changes in the crystal structure post firing were only observed at the surface of the SM specimens.ConclusionsBoth manufacturing methods showed regular microstructures prior to porcelain firing. Laser-sintered CoCr had stronger bonding to porcelain than milled pre-sintered CoCr and was also more stable microstructurally post-ceramic firing. However, both manufacturing methods were deemed to have satisfactory adhesion strength to porcelain. It was also found that increased hardness of CoCr had an inverse relationship with bonding strength. High strength porcelain bonding and stability following multiple ceramic firings indicate suitability for use of these CoCr materials with implant or tooth supported long-span frameworks. |
| Keywords: | 3D printing Laser sintering Cobalt chromium Soft milling Porcelain fused to metal |
| 本文献已被 ScienceDirect 等数据库收录！ | |