Oral Health–Related Quality of Life and Patient-Reported Outcomes After Implant Rehabilitation Using CAS Kit–Assisted Indirect Maxillary Sinus Augmentation: A Longitudinal Observational Study

Background: Partial edentulism in the posterior maxilla is frequently complicated by alveolar bone resorption and maxillary sinus pneumatization, limiting implant placement and negatively affecting oral health–related quality of life (OHRQoL). Minimally invasive sinus augmentation techniques, such as CAS KIT–assisted indirect sinus elevation, aim to reduce surgical morbidity; however, evidence regarding patient-reported outcomes remains limited. Objective: To evaluate oral health–related quality of life and patient-reported outcomes following implant rehabilitation using CAS KIT–assisted indirect maxillary sinus augmentation. Materials and Methods: This logitudinal observational study included 34 patients who underwent CAS KIT–assisted transcrestal sinus augmentation with implant placement in the posterior maxilla. Postoperative recovery and satisfaction were assessed using the HRQOL-7 questionnaire over seven postoperative days. OHRQoL was evaluated using the OHIP-14 questionnaire at baseline and one month after prosthetic rehabilitation. Data were analyzed using repeated measures ANOVA with a significance level set at p < 0.05. Results: HRQOL scores showed a statistically significant improvement over the seven-day postoperative period (p < 0.001), with stabilization observed from Day 5 onward. OHIP-14 scores demonstrated a highly significant reduction from baseline to post-intervention assessment (p < 0.001), indicating marked improvement in OHRQoL across all participants. Conclusion: CAS KIT–assisted indirect sinus augmentation followed by implant rehabilitation results in rapid postoperative recovery and significant improvement in patient-reported outcomes, supporting its role as a predictable and patient-centered treatment modality for posterior maxillary rehabilitation.