In the treatment of patients with severe periodontal disease, it is becoming possible to re-establish a healthy and well-functioning dentition through interdisciplinary dental teamwork. This article presents a case using a resin-bonded splint for stabilizing periodontally compromised mandibular anterior teeth after orthodontic treatment. A 30-year-old woman came to the authors with severe periodontitis, which had resulted in spacing of the anterior teeth and tipping of the posterior teeth. Periodontal-orthodontic treatment was combined with prosthodontic reconstruction, and a resin-bonded splint extending from canine to canine was placed for postorthodontic stabilization of the periodontally compromised teeth. No debonding of the splint occurred, and no further periodontal invasion was found in this case after 4 years of follow-up.