Abstract: Purpose：This study was aimed to evaluate the Influence of Lateral-Medial Sinus Width on the Outcomes Of Sinus elevation without graft via transcrestal approach. Patients and methods: All patients who received non-grafting osteotome sinus elevation with implant placement simultaneously in our department were recruited for this retrospective study according to inclusion and exclusion criteria. Data are measured from patients’ cone beam CT which were taken before, right after and 6 months after the surgery. Then relation between the bone formation height(BFH) and sinus width(SW) were analyzed. Results: A total number of 48 patients, 52 implants inserted in 52 lifted sinuses were included in this study.The average SW and RBH was 16.07±4.17 mm,6.42±1.17mm,respectively.The average EH was 4.34±0.93 mm. Intrasinus BFH was1.06±0.57 mm at 6 months after surgery. Multivariate analysis showed a negative correlation between SW and BFH,HR( P＜0.01), NO Statistical significance was discovered between SW and EH,RBH during test. Conclusions: A negative correlation was observed between sinus width and bone formation beight insinus elevation without graft via transcrestal approach.

Key words: sinus width, transcrestal sinus elevation, non-graft, intrasinus bone formation