engleski

Conception and frequency and Severity of Noncarious Cervical Lesions

The teeth with most noncarious cervical lesions (NCCL) are the premolars, which also have the largest percentage of higher index numbers, indicating the greater severity of lesions. Many authors suggest that excentric lateral forces, wich arise at occlusion and articulation, are one of the causes of NCCLs. Due to that, and since at group function the most leading teeth are premolars, and at canine guidance the most leading teeth are canines, we want to investigate if there any differences in the frequency and severity of NCCLs at premolars according to the type of occlussion. Methods: The study included 807 inhabitants of Rijeka with 4154 premolars, chosen at random in four dental practices. In these subjects 1032 premolars with NCCL were found. NCCLs were recorded according to the Tooth Wear Index (TWI) by Smith & Knight. The type of occlussal conception was established by clinical examination and clasificated as canine guidance or group function, for both sides separatly. Results:The most interesting index levels for clinical practice are 2, 3 and 4, which represent well formed cervical lesions. At the canine guidance level 2 was found in 9%, level 3 in 8% and level 4 in 0.8%. At the group function level 2 was found in 5.8%, level 3 in 7.3% and level 4 in 1.6%. Level 2 was found in higher precentage in the subjects with canine guidance. Level 4 was found in higher precentage in subjects with group function. Conclusion: Our findings suggest that subjects with group function have more premolars affected with the higher levels of NCCL.

occlusal conception ; noncarious cervical lesion

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