Risk factors associated with post-loading implant loss of removable and fixed implant-supported prostheses in edentulous jaws
Available online 9 March 2018
Original article
Abstract
Purpose
This
study analyzed risk factors for post-loading implant loss in cases of
implant-supported prostheses applied to edentulous jaws of Japanese
patients.
Methods
In total,
245 dental implant fixtures placed in 54 edentulous jaws of 46 patients
performed at Niigata University Hospital were retrospectively analyzed.
Kaplan–Meier curves were used to estimate the cumulative survival rate
(SR) of implants, and multiple Cox regression analysis was used to
identify predictive factors of implant loss. The following risk factors
for implant failure were examined: age, sex, survival time, implant
length, implant location, smoking habit, bone density, bone
augmentation, opposing dentition, loading period, and type of final
restoration. The Cochran–Mantel–Haenszel test was used to examine
difference in survival curves of the extracted predictors.
Results
Sixteen
implants failed during the observation period (SR = 92.8 %). Multiple
Cox regression analysis revealed that male sex [hazard ratio
(HR) = 16.1; p = 0.007] and use of maxillary removable restorations (HR = 12.7; p < 0.000)
were risk factors for implant failure. Other factors had no significant
effect on implant failure. The SR of implants for males (SR = 86.9 %)
was significantly lower than that for females (SR = 99.1 %). The SR of
implants for maxillary removable restorations (SR = 76.4 %) was
significantly lower than for maxillary fixed restorations (SR = 99.1 %)
and mandibular fixed restorations (SR = 97.8 %).
Conclusions
Maxillary
implants with removable restorations and male sex were risk factors for
implant failure among Japanese edentulous patients.
Comments