Comparative evaluation of the depth of curve of Spee between individuals with normal dentition and individuals with occlusal wear using conventional and digital software analysis techniques: An <i>in vivo</i> study.

Furthermore, it has been suggested that excursive interferences may result in wear, fracture of restorations, and TMJ dysfunction.[ 29 ] A highly significant correlation is demonstrated between the forward inclination of the superficial masseter muscle and the forward tilt of molar teeth in the sagittal plane, conforming to the posterior end of the curve of Spee.[ 19 , 30 , 31 ] This correlation between the muscle of mastication and forward tilt of molar teeth in sagittal plane (curve of Spee) supports the theory that the curve of Spee has a biomechanical function during food processing by increasing the crush/shear ratio between the posterior teeth and the efficiency of occlusal forces during mastication.

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