(1) Background: Asians tend to have a regressive midface. Midface augmentation is an effective treatment, and various materials have been used as fillers for this purpose. Bio-Oss bone powder has a strong positive effect on promoting new bone regeneration, and has been used in the dental field for over 30 years. However, it has not been used and reported as a filler in midface augmentation. (2) Objective: To evaluate the safety and efficacy of midface augmentation using Bio-Oss bone powder in treating midface retrusion and resulting nasolabial folds, and to develop a predictive model for patient satisfaction. (3) Methods: 85 patients underwent midface augmentation through an intraoral approach with Bio-Oss. Treatment efficacy was assessed by blinded investigators. The data on safety were collected from patient interviews at each follow-up visit. A questionnaire was used for investigating patient satisfaction. The influencing factors of satisfaction were analyzed by univariate and multivariate analysis. A nomogram to predict the risk of dissatisfaction was built based on significant factors with R software. Results: Compared to baseline, there was a significant improvement (p < 0.001) in Wrinkle Severity (4) Rating Scale scores at week 24, with a mean decrease of 0.52 ± 0.57. The aesthetic improvement rate evaluated by the Global Aesthetic Improvement Scale was 92.9%. Four mild treatment-related adverse events were noted. The majority of patients were satisfied overall. A nomogram with good prediction performance was plotted. (5) Conclusions: This new procedure yielded safe and satisfactory aesthetic results. A nomogram with good test performance and discriminative ability was established for predicting patient satisfaction.
Keywords: biomaterial; guided bone regeneration; midface augmentation; nasolabial fold.