Biomechanical Stability of Two Different Maxillofacial Screws in a Rabbit Model

Internal rigid fixation techniques are commonly used to treat maxillofacial fractures by stabilizing bone segments using titanium plates and screws. The current study aimed to compare the biomechanical stability of two inaxillofacial screws with different tip designs in vivo. Materials and Methods: Six male rabbits were randomly divided into two experimental periods of 0 and 4 weeks. Under general anesthesia, the screws were randomly placed in the Libia bonc on both sides os cach animal. The pulloul lost was conducted using a Senlam lest device. Data were statistically analyzed using ANOVA. Results: The average insertion torque for non-self-tapping and self-tapping screws amounted to 4.2+1.7 and 4.8+1.4 Newton/centimeter, respectively (P-value >0.05). The calculated mcasures for the pulloul lest demonstraled a significant incrcase of secondary stabilily asler 4 weeks in comparison to () week (P-value<0.001). However, the results among the two screws showed no statistically significant difference in each time point (Pvalue >0.05). Conclusion: No signisicant differences were demonstrated among self-lapping or non-self-tapping maxillofacial screws.