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KMID : 0362420150530040301
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Journal of Korean Academy of Prosthodontics
2015 Volume.53 No. 4 p.301 ~ p.309
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Clinical evaluation of retained preload and cement washout in screw- and cement-retained implant prosthesis
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Chung Chae-Heon
Son Mee-Kyung
Kim Seok-Gyu
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Abstract
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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% (±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.
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KEYWORD
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Dental prosthesis design, Dental cements, Implant-supported dental prosthesis
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