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http://dx.doi.org/10.4047/jkap.2015.53.4.301

Clinical evaluation of retained preload and cement washout in screw- and cement-retained implant prosthesis  

Chung, Chae-Heon (Department of Prosthodontics, College of Dentistry, Chosun University)
Son, Mee-Kyoung (Department of Prosthodontics, College of Dentistry, Chosun University)
Kim, Seok-Gyu (Department of Prosthodontics, Samsung Medical Center, College of Medicine, Sungkyunkwan University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.53, no.4, 2015 , pp. 301-309 More about this Journal
Abstract
Purpose: The aim of this study was to evaluate the clinical performance of screw- and cement-retained implant prosthesis (SCP) design in terms of retained preload of abutment screws and cement washout. Materials and methods: Patients with the partial posterior edentulous areas comprised the study group. Implants were placed, and SCPs were delivered after 3 to 6 months healing. Follow-up examinations were performed. The implant survival rate and the prosthetic success rate were evaluated. The retained preload ratio of abutment screws and the prosthetic decementation ratio were measured. Results: Twenty one SCPs (forty three implants)in twenty patients were followed up to 64 months. All of the implants survived during the follow-up period (mean follow-up: 34 months). The prosthetic success rate was 100 % considering no abutment, screw, porcelain or metal frame fractures, as well as no screw loosening. The retained preload ratio of SCPs at the end of follow-up period was 97.61% (${\pm}16.29$) and the decementation ratio was 9.5 %. Conclusion: Within the limitations of this clinical study, SCP design showed favorable short-term clinical performances in respect of screw loosening and cement washout.
Keywords
Dental prosthesis design; Dental cements; Implant-supported dental prosthesis;
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