Abstract: Objective: To evaluate the clinical effect of Bicon implant combined with maxillary sinus inner lift technology for upper posterior missed teeth. Methods: Retrospectively study was used to check the prosthetic effect of 20 Bicon implants in 13 patients. Clinical examination and CBCT were taken to learn the successful rate of Bicon implants under the condition of lack of bone mass. Results: All 20 Bicon implants were steady with 2~5mm sinus inner lift and no maxillary sinus mucosa perforation was happened under clinical examination. CBCT showed that bones around all implants were not absorbed. Conclusion: Bicon implant combined with maxillary sinus inner lift technology can successfully restore upper posterior missed teeth with bone defect.

Key words: Bicon , Maxillary sinus , Bone defect , CBCT