Early implant failure: a retrospective analysis of contributing factors

Abstract

The aim of this retrospective study was to determine the prevalence of early implant failure using a single implant system and to identify the factors contributing to early implant failure. Methods: Patients who received implant treatment with a single implant system (Luna ® , Shinhung, Seoul, Korea) at Dankook University Dental Hospital from 2015 to 2017 were enrolled. The following data were collected for analysis: sex and age of the patient, seniority of the surgeon, diameter and length of the implant, position in the dental arch, access approach for sinus-floor elevation, and type of guided bone regeneration (GBR) procedure. The effect of each predictor was evaluated using the crude hazard ratio and the adjusted hazard ratio (aHR) in univariate and multivariate Cox regression analyses, respectively. Results: This study analyzed 1,031 implants in 409 patients, who comprised 169 females and 240 males with a median age of 54 years (interquartile range [IQR], 47-61 years) and were followed up for a median of 7.2 months (IQR, 5.6-9.9 months) after implant placement. Thirty-five implants were removed prior to final prosthesis delivery, and the cumulative survival rate in the early phase at the implant level was 95.6%. Multivariate regression analysis revealed that seniority of the surgeon (residents: aHR=2.86; 95% confidence interval [CI], 1.37-5.94) and the jaw in which the implant was placed (mandible: aHR=2.31; 95% CI, 1.12-4.76) exerted statistically significant effects on early implant failure after adjusting for sex, age, dimensions of the implant, and type of GBR procedure (preoperative and/or simultaneous) (P<0.05). Conclusions: Prospective studies are warranted to further elucidate the factors contributing to early implant failure. In the meantime, surgeons should receive appropriate training and carefully select the bone bed in order to minimize the risk of early implant failure.

Implant survival and risk factor analysis in regenerated bone: results from a 5-year retrospective study

“…Potential risk factors for implant failure include demographic, health status, anatomic, implant- and prosthodontic-specific, and ancillary procedure-related variables [ 28 29 ]. Age, smoking, fixture length, implant location, and/or bone quality were suggested to be associated with early failure, generally caused by the loss of osseointegration [ 29 30 31 32 ]. Factors contributing to late failure after prosthetic loading included dental plaque and occlusal overload [ 33 ].…”

The risk factors of early implant failure: A retrospective study of 6113 implants

“…Since 1980s, there have been a series of studies investigating the early implant failure, with prevalence reported ranging from 0.3% to 5.8% at implant level 3‐7,9‐14 . However, a huge sample size divergence exists in previous studies (ranging from 186 patients to 30 959 implants), which jeopardizes the consistency of the reported conclusion.…”

The impact of the alveolar bone sites on early implant failure: a systematic review with meta-analysis

“…Moreover, failures in the anterior mandible are more common than posterior failures, with the posterior maxilla recording the highest rate of failure 15 . A recent study reported that the two jaw bones exhibited the same rate of implant failure and stated that implantation site is not a modulating factor influencing EIF rate 17 .…”