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2019 Vol.23, Issue 3 Preview Page

Original Article

Mechanical Complications of Posterior Implant Restorations using CAD/CAM Titanium Customized Abutments: A Retrospective Study

CAD/CAM 티타늄 맞춤 지대주로 수복한 구치부 임플란트에서의 기계적 합병증에 대한 후향적 연구

Minyoung Yang1
,
Jae-Seung Chang1
,
Woon Ji1
,
Sunjai Kim1*
양 민영1
,
장 재승1
,
지 운1
,
김 선재1*
1Department of Prosthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
1강남세브란스 치과병원 치과보철과
*Corresponding Author
30 September 2019. pp. 150-161
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Abstract

Purpose: The purpose of this retrospective study was to evaluate the incidence of mechanical complications of the posterior implant-supported fixed dental prosthesis (p-ISFDP) using computer-aided design and computer-aided manufacturing (CAD/CAM) titanium customized abutments and to evaluate the influencing factors on complications.Material and Methods: The incidence and consequences of mechanical complications in p-ISFDPs over a mean follow up period of 54.43 ± 6.24 months were assessed based on electronic documentations from 138 patients with 266 implants. All p-ISFDP utilized CAD/CAM titanium customized abutments, and were fabricated with cement-retained prostheses with occlusal screw access holes. Statistical analyses were performed to identify the risk factors of mechanical complications. Results: During the observation period (3 - 5 years), implant survival rates were 100%. Major mechanical complications were 8 abutment fractures (3.01%), 8 screw loosenings (3.01%), 2 screw fractures (0.75%), 11 chipping or fractures of veneering materials (5.58%), 23 decementations of the superstructure (11.68%). The relationship between the incidence of mechanical complications and the possible factors were not statistically significant(p > .05).Conclusion: There is no significant difference between each mechanical complication and the risk factors. P-ISFDP fabricated with CAD/CAM titanium abutments is a clinically acceptable treatment.

Keywords
CAD/CAM
Mechanical complication
Implant-supported dental prosthesis
Customized abutment
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Information
  • Publisher :The Korean Academy of Oral & Maxillofacial Implantology
  • Publisher(Ko) :대한구강악안면임플란트학회
  • Journal Title :Implantology
  • Journal Title(Ko) :대한구강악안면임플란트학회지
  • Volume : 23
  • No :3
  • Pages :150-161
  • Received Date : 2019-09-09
  • Revised Date : 2019-09-18
  • Accepted Date : 2019-09-19
  • DOI :https://doi.org/10.32542/implantology.2019012
Journal Informaiton Journal of implantology and applied sciences Journal of implantology and applied sciences
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