Abstract: The purpose of this clinical case analysis was to report the treatment and follow-up outcomes of one case with severe bone defect at the edentulous site, and to conduct a preliminary investigation of the efficacy of dentin shell technique for alveolar bone augmentation based on this case. One partial edentulous case caused by chronic periodontitis was included. Because of the significant bone resorption, the vertical distance between alveolar crest and inferior alveolar nerve canal was 3.63 mm approximately. Dentin shell technique was applied to conduct bone augmentation in this case. The non-functional third molar was extracted and processed into dentin shells with a thickness of ≤; 2 mm. The dentin shells were fixed at the recipient sites as an external barrier. The space between dentin shells and host bone was filled with Bio-Oss particles mixed with concentrated growth factor (CGF). A vertical bone gain of 10.62 mm was achieved 6 months after the bone augmentation surgery. Two implants were placed. The bone height and width remain stable without significant bone resorption, and the bone density increased, which indicated favorable bone regeneration outcome 6 months after implant placement. The outcomes of definitive restoration and follow-up were satisfying. Dentin shell technique is a novel three-dimension bone augmentation method and provides a novel choice for patients with non-functional natural teeth. But the efficacy of dentin shell technique needs further investigation in clinical trials with larger sample sizes and longer follow-up periods.