While fillings serve a variety of roles as a dental treatment, in the traditional sense, teeth do not necessarily get stronger from fillings. This is because the filling is slightly softer than enamel. However, what does occur is a significant reinforcement and restoration of the tooth's structure. Filling will effectively fit the spaces where decay or damage has occurred, thereby preventing further damage. Keep in mind that even with tooth filling, the tooth is still present, and needs proper hygiene and habits to stay strong. So while filling may not make teeth stronger in the traditional sense, they do restore structure and maintain functionality to prevent future issues.