Implant Survival and Radiographic Outcome of a Novel Implant With a Machined Long Neck: A 1-Year Retrospective Study

The primary objective was to assess 1-year clinical and radiographic outcomes of a newly designed implant with a machined long neck in the anterior region, including marginal bone loss, horizontal bone width, vertical bone height, and implant survival and success rates. The secondary objective was to evaluate the effect of guided bone regeneration on bone dimensional changes and implant survival and success rates.

A total of 117 implants in 58 patients who received the novel implant in the anterior region were included. Marginal bone loss, horizontal bone width, and vertical bone height changes were assessed using panoramic radiographs and cone beam computed tomography (CBCT) scans obtained after prosthetic restoration and at the one-year follow-up. Implant survival and success rates, along with the influence of guided bone regeneration (GBR) on bone dimensional changes, were statistically analyzed.

Within the one-year follow-up period, implant survival and success rates were 97.43% and 91.45% at the implant level, and 94.83% and 82.76% at the patient level, respectively. Among the 114 surviving implants, the mean marginal bone loss was 0.46 ± 1.05 mm. In the subset of 32 implants with available CBCT data, horizontal bone width and vertical bone height changes were minimal in both buccal and palatal/lingual aspects. Subgroup analyses indicated that guided bone regeneration provided measurable advantages in preserving bone dimensions at specific sites, particularly in the mid-buccal region and the palatal/lingual vertical height. However, at most other reference points, dimensional changes were comparable irrespective of whether GBR was performed.

A novel implant featuring a machined long neck exhibited clinically acceptable outcomes with respect to implant survival, implant success, and bone dimensional stability over a one-year follow-up period.