J Periodontal Implant Sci.  2024 Feb;54(1):44-52. 10.5051/jpis.2300820041.

Clinical evaluation of 3.0-mm narrowdiameter implants: a retrospective study with up to 5 years of observation

• Hwang I
• Kim TI
• Cho YD

• KMID: 2557145
• DOI: http://doi.org/10.5051/jpis.2300820041

Abstract

Purpose
This study aimed to evaluate the clinical outcomes of a single type of narrowdiameter implant (NDI) by investigating its survival rate and peri-implant marginal bone loss (MBL). In addition, variables possibly related to implant survival and MBL were investigated to identify potential risk factors.
Methods
The study was conducted as a retrospective study involving 49 patients who had received 3.0-mm diameter TSIII implants (Osstem Implant Co.) at Seoul National University Dental Hospital. In total, 64 implants were included, and dental records and radiographic data were collected from 2017 to 2022. Kaplan-Meier survival curves and a Cox proportional hazard model were used to estimate the implant survival rate and to investigate the effects of age, sex, jaw, implant location, implant length, the stage of surgery, guided bone regeneration, type of implant placement, and the surgeon’s proficiency (resident or professor) on implant survival. The MBL of the NDIs was measured, and the factors influencing MBL were evaluated.
Results
The mean observation period was 30.5 months (interquartile range, 26.75–45 months), and 6 out of 64 implants failed. The survival rate of the NDIs was 90.6%, and the multivariate Cox regression analysis showed that age was associated with implant failure (hazard ratio, 1.17; 95% confidence interval, 1.04–1.31, P=0.01). The mean MBL was 0.44±0.75 mm, and no factors showed statistically significant associations with greater MBL.
Conclusions
NDIs can be considered a primary alternative when standard-diameter implants are unsuitable. However, further studies are required to confirm their long-term stability.

Keyword

Alveolar bone loss; Dental implants; Follow-up studies; Risk factors; Survival analysis