Abstract
The impact of three-unit fixed posterior metal-ceramic restorations on alveolar bone loss in diabetic patients is of interest. Hence, a total of 72 patients at the Najran University, Faculty of Dentistry were divided into two groups: G1 (36 patients, without three-unit fixed posterior metal-ceramic restorations) and G2 (36 patients, with three-unit fixed posterior metal-ceramic restorations). Clinical evaluations and imaging revealed that G2 exhibited significantly higher plaque index (P.I.), gingival index (G.I.) and alveolar bone loss compared to G1 with (p < 0.05). The results underscore the increased risk of periodontal complications and bone loss in diabetic patients with metal-ceramic restorations. This highlights the critical need for enhanced preventive care, including improved oral hygiene practices, careful selection of restorative materials and tailored periodontal monitoring for diabetic patients. Clinicians should consider these factors to reduce the risk of bone resorption and ensure long-term success in restorative dental treatments for this vulnerable population.