Application of the dual-zone therapeutic technique in flapless immediate implant placement and immediate restoration in the aesthetic zone: a 7-year follow-up case report

doi:10.12337/zgkqzzxzz.2025.08.008

Abstract

Abstract: This case report evaluates the clinical outcomes of the dual-zone therapeutic technique in flapless immediate implant placement and immediate restoration in the maxillary anterior aesthetic zone. A 47-year-old female patient presented with an irreparable crown-root fracture of the upper right central incisor caused by trauma. Following minimally invasive tooth extraction, flapless immediate implant placement and immediate restoration were performed using the dual-zone therapeutic technique. A personalized impression was taken 7 months postoperatively, and a screw-retained zirconia crown was delivered. Over a 7-year follow-up, the aesthetic outcome remained stable, and the patient reported high satisfaction. CBCT and standardized periapical radiographs taken with the paralleling technique showed a stable marginal bone level and sufficient labial bone thickness. Digital intraoral scans confirmed well-maintained labial contour without significant collapse or resorption. This case suggests that, with strict case selection and standardized protocols, the dual-zone therapeutic technique can achieve long-term stability and favorable aesthetic outcomes in cases of flapless immediate implant placement and immediate restoration.

Key words: Dual-zone therapeutic technique, Immediate implant placement, Immediate restoration, Contour collapse

Zhang Jia, Sun Xianyin, Yang Yundong, Xiao Huijuan. Application of the dual-zone therapeutic technique in flapless immediate implant placement and immediate restoration in the aesthetic zone: a 7-year follow-up case report[J]. Chinese Journal of Oral Implantology, 2025, 30(4): 377-383.

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