Preliminary study for fully digitally guided implant treatment with narrow implants in the anterior region

Abstract

The aim of this study was to evaluate the survival rates of narrow implants placed in the maxillary or mandibular anterior region with digitally guided flapless surgery and prosthetic system. Thirty-five narrow implants were placed in the narrow anterior region in 20 patients using the digitally guided flapless surgery. The study subjects were divided into the immediate-loading group and the delayed-loading group. In 3 months, when the alveolar bone was healed, an oral scanner was used to produce zirconia prosthesis, and the final prosthesis was designed with a three-dimensional program. The degree of bone resorption around the implant was recorded at 12 months and 24 months after surgery. The implant fixation stability was measured after placement; the stability was in the range of Implant stability quotient (ISQ) 63-78 (average ISQ, 71.20±3.80). The radiographs obtained at 12 months and 24 months after implantation revealed that the bone around the implant in the fresh extraction socket and around the implant placed in the healed site showed an average bone resorption of 0.33±0.07 mm and 0.18±0.02 mm, respectively. After 2 weeks, one implant was removed because the patient complained of pain with radiolucency in the entire fixture. The overall implant survival rate was 97.1%. Narrow implants placed on the fresh extraction socket or healed site using the digitally guided surgery system were maintained well, with minor marginal bone resorption. As a result, we found that this method is useful for treating anterior teeth on a narrow bone.