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Prevalence of proximal contact loss between implant-supported fixed prostheses and adjacent natural teeth and its associated factors: a 7-year prospective study

Authors
 Nan‐Sim Pang  ;  Chang‐Sup Suh  ;  Kee‐Deog Kim  ;  Wonse Park  ;  Bock‐Young Jung 
Citation
 Clinical Oral Implants Research, Vol.28(12) : 1501-1508, 2017 
Journal Title
 Clinical Oral Implants Research 
ISSN
 0905-7161 
Issue Date
2017
Keywords
clinical research ; implant-fixed prostheses ; proximal contact loss
Abstract
OBJECTIVES: The aim was to analyze the prevalence rate of proximal contact loss (PCL) between implant-fixed prostheses (IFPs) and adjacent teeth and investigate the associated factors. MATERIAL AND METHODS: One hundred fifty participants were recruited for this prospective study from January 2009 to December 2014. Two hundred thirty-four IFPs supported by 384 implants for the posterior region were followed up until June 2016. The contact tightness had been recorded using aluminum strips of different thicknesses with a regular interval after delivery. Proximal contact was considered as lost if the contact tightness was over 50 μm, and statistical analyses were performed to estimate the prevalence rate of PCL and its influential factors. RESULTS: Among the total 299 proximal contacts of 234 IFPs, 179 were observed as a PCL (59.9%). Bone level and root configuration of the adjacent teeth, the proximal contact position and jaw position of the implant prostheses were statistically significant factors, when analyzed by the cumulative PCL rate using the log-rank test of the Kaplan-Meier method (P < 0.05) According to the Cox proportional hazard regression analysis, the proximal contact position, bone level of adjacent teeth and jaw position were revealed to be statistically significant (P < 0.05). CONCLUSION: PCL should be considered an implant prosthesis complication to which various associated factors could be related. This study revealed that the lower alveolar bone support level of the adjacent teeth, maxillary position of IFPs and mesial site of IFPs were significantly associated with a higher incidence of PCL.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/161442
DOI
10.1111/clr.13018
Appears in Collections:
1. Journal Papers (연구논문) > 2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과)
Yonsei Authors
김기덕(Kim, Kee Deog) ; 박원서(Park, Wonse) ; 방난심(Pang, Nan Sim) ; 정복영(Jung, Bok Yeong)
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Full Text
https://onlinelibrary.wiley.com/doi/abs/10.1111/clr.13018
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