Abstract: Objective To explore the differences of the membrane ductility of goat paranasal sinus membrane and analyze the reasons that may cause these differences and to provide theoretical basis and guidance for the issues of the maxillary sinus floor augmentation related to the membrane. Methods The membrane was cut into desired size from every sinus membrane. The ductility data were measured by using the push-pull gauge and the homemade fixtures. The results were analyzed by One-way AINOVA. Results Goat maxillary sinus membrane ductility of the top was (4.68±0.94)N, that of the bottom was (5.27±1.12)N, and the frontal sinus membrane was (1.97±0.46)N. The mean differences of membrane ductility between the top of the maxillary sinus and the frontal sinus, the bottom and the frontal were statistically significant (P＜0.05), while the top and the bottom were not statistically significant (P＞0.05). Conclusion The top and bottom membrane ductility of maxillary sinus is bigger than that of the frontal sinus membrane. There is no difference between the top and the bottom membrane ductility of maxillary sinus.

Key words: goat, maxillary sinus floor elevation, sinus membrane, ductility