The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Comparison of implant component fractures in external and internal type: A 12-year retrospective study

  • Yi, Yuseung (Department of Prosthodontics & Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Koak, Jai-Young (Department of Prosthodontics & Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Kim, Seong-Kyun (Department of Prosthodontics & Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Lee, Shin-Jae (Department of Orthodontics, School of Dentistry, Seoul National University) ;
  • Heo, Seong-Joo (Department of Prosthodontics & Dental Research Institute, School of Dentistry, Seoul National University)
  • Received : 2017.08.11
  • Accepted : 2017.10.30
  • Published : 2018.04.30
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Abstract

PURPOSE. The aim of this study was to compare the fracture of implant component behavior of external and internal type of implants to suggest directions for successful implant treatment. MATERIALS AND METHODS. Data were collected from the clinical records of all patients who received WARANTEC implants at Seoul National University Dental Hospital from February 2002 to January 2014 for 12 years. Total number of implants was 1,289 and an average of 3.2 implants was installed per patient. Information about abutment connection type, implant locations, platform sizes was collected with presence of implant component fractures and their managements. SPSS statistics software (version 24.0, IBM) was used for the statistical analysis. RESULTS. Overall fracture was significantly more frequent in internal type. The most frequently fractured component was abutment in internal type implants, and screw fracture occurred most frequently in external type. Analyzing by fractured components, screw fracture was the most frequent in the maxillary anterior region and the most abutment fracture occurred in the maxillary posterior region and screw fractures occurred more frequently in NP (narrow platform) and abutment fractures occurred more frequently in RP (regular platform). CONCLUSION. In external type, screw fracture occurred most frequently, especially in the maxillary anterior region, and in internal type, abutment fracture occurred frequently in the posterior region. placement of an external type implant rather than an internal type is recommended for the posterior region where abutment fractures frequently occur.

Keywords

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