Maxillofac Plast Reconstr Surg.  2019 ;41(1):27. 10.1186/s40902-019-0209-1.

Repeated failure of implants at the same site: a retrospective clinical study

Affiliations
  • 1Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300, Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea. kyk0505@snubh.org
  • 2Department of Orthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
  • 3Department of Conservative Dentistry, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
  • 4Department of Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.

Abstract

BACKGROUND
Implants are becoming the first choice of rehabilitation for tooth loss. Even though they have a high success rate, failures still occur for many reasons. The objective of this study is to analyze the reasons for recurring failure at the same site and the results of re-implantation.
METHODS
Thirteen patients (11 males and 2 females, mean age 60 ± 9.9"‰years) who experienced implant surgery failure at the same site (same tooth extraction area) two or more times in the Department of Oral and Maxillofacial Surgery, Seoul National University Bundang Hospital, between 2004 and 2017 were selected. The medical records on a type, sites, diameter, and length of implants; time and estimated cause of failure; and radiographs were reviewed. Data were collected and analyzed retrospectively, and the current statuses were evaluated.
RESULTS
A total of 14 implants experienced failure in the same site more than two times. Twelve implants were placed in the maxilla, while 2 implants were placed in the mandible. The maxillary molar area was the most common site of failure (57.1%), followed by the mandibular molar, anterior maxilla, and premolar areas (14.3% each). The first failure occurred most commonly after prosthetic treatment (35.7%) with an average period of failure of 3.8"‰months after loading. Ten cases were treated as immediate re-implantation, while the other 4 were delayed re-implantation after an average of 3.9"‰months. The second failure occurred most commonly after prosthetic treatment (42.9%), with an average of 31"‰months after loading; during the healing period (42.9%); and during the ongoing prosthetic period (14.3%). In 3 cases (21.4%), the treatment plan was altered to an implant bridge, while the other 11 cases underwent another implant placement procedure (78.6%). Finally, a total of 9 implants (64.3%) survived, with an average functioning period of 60"‰months.
CONCLUSIONS
Implants can fail repeatedly at the same site due to overloading, infection, and other unspecified reasons. The age and sex of the patient and the location of implant placement seem to be associated with recurring failure. Type of implant, bone augmentation, and bone materials used are less relevant. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s40902-019-0209-1) contains supplementary material, which is available to authorized users.

Keyword

Implant failure; Cluster failure; Repeated failure

MeSH Terms

Bicuspid
Clinical Study*
Female
Humans
Male
Mandible
Maxilla
Medical Records
Molar
Rehabilitation
Retrospective Studies*
Seoul
Surgery, Oral
Tooth Extraction
Tooth Loss
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