PURPOSE: To evaluate the putative role of occlusal loading in the pathogenesis of non-carious cervical lesions (NCCLs) in subjects who exhibited mixed excursive guidance [i.e., immediate canine guidance on one side and group function (GF) on the other]. METHODS: 20 subjects with Angle Class 1 occlusion and having from 1 to 5 NCCLs on separate teeth were selected. Only subjects who displayed mixed excursive guidance were recruited so that they could serve as their own controls. Non-carious cervical lesions were recorded on casts mounted in semi-adjustable articulators. RESULTS: On the GF sides, 22.5% of all teeth that contacted in working excursions exhibited NCCLs; only 2.1% of the teeth on the canine guided sides exhibited NCCLs, which were found exclusively in canines. Although a case for the multifactorial etiology of NCCLs remains strong, our data, albeit limited, seems to support the dominant role of occlusion in lesion formation.
PURPOSE: To evaluate the putative role of occlusal loading in the pathogenesis of non-carious cervical lesions (NCCLs) in subjects who exhibited mixed excursive guidance [i.e., immediate canine guidance on one side and group function (GF) on the other]. METHODS: 20 subjects with Angle Class 1 occlusion and having from 1 to 5 NCCLs on separate teeth were selected. Only subjects who displayed mixed excursive guidance were recruited so that they could serve as their own controls. Non-carious cervical lesions were recorded on casts mounted in semi-adjustable articulators. RESULTS: On the GF sides, 22.5% of all teeth that contacted in working excursions exhibited NCCLs; only 2.1% of the teeth on the canine guided sides exhibited NCCLs, which were found exclusively in canines. Although a case for the multifactorial etiology of NCCLs remains strong, our data, albeit limited, seems to support the dominant role of occlusion in lesion formation.