Mode and frequency of artificially produced occlusal interferences

: A number of 128 filled premolars and molars were examined for the contours of the fillings. Exactly modelled marginal occlusion was found in 52.3% of the fillings, and in 62.4% there were exactly modelled approximal surfaces including contact points. With respect to the modelling of masticatory surfaces only 0.2% of the fillings had been modelled exactly, 61.9% were moderately profiled, 28.5% were evenly modelled, and 9.4% of the fillings had been undermodelled. The crista transversa which is important for securing occlusion was conserved in only 8.9% of all prepared molars. The high percentage of fillings with defective occlusion is in accordance with the high frequency of detected disfunctions in the stomatognathic system as a whole.