ABSTRACT
Aim: The aim was to compare the clinical wear of two compomers (F2000; 3M/ESPE and Dyract AP; Dentsply) placed in occlusal cavities in permanent molars within a two-year follow-up period using an indirect method of evaluation. Methods: Twenty-one patients, whose treatment plans included Class I restorations, were selected. Each patient received two occlusal Class I restorations in permanent molars. One and 2 years after placement of the restorations, the 21 teeth restored with each material were submitted to wear evaluation. Polyvinylsiloxane impressions were taken and casts were made (baseline, 1 year and 2 years). The casts were classified by comparative evaluation using sets of 18 calibrated standard models (0 to 900 ìm), according to Leinfelders indirect method. Paired and unpaired t-tests were used for comparisons between the evaluations for the same material and between materials for each evaluation period, respectively. Results: The occlusal wear was higher after 2 years than after 1 year (p<0.001). The t-test demonstrated that the wear values, after 1 year, were similar for both compomers (F2000=17.6 ìm and Dyract AP=12.8 ìm). However, after 2 years, F2000 restorations (40.6 ìm) suffered significantly more wear (p<0.05) than Dyract AP restorations (29.8 ìm). Although compomers performed similarly after 1 year, Dyract showed less occlusal wear after 2 years. All occlusal Class I compomer restorations presented more occlusal wear after 2 years, but were considered as clinically acceptable within the evaluation period. Conclusions: The mean wear values found for both compomers do not indicate the need for either repair or replacement of the restorations.
Subject(s)
Humans , Male , Adult , Compomers , Dental Restoration Wear , Dental Restoration, PermanentABSTRACT
O objetivo deste estudo in vitro foi avaliar o desgaste de três materiais restauradores diretos (dispesalloy, Surefil e Z250), através de dois metodos: visual (escala M-L) e quantitativo (perfilografo). Superficies ocludais de doze terceiros molares humanos foram aplainadas com disco diamantado e cavidades cilíndricas padronizadas foram confeccionadas no centro delas, com uma ponta diamantada nº721PM, e restauradas conforme instruções dos fabricantes. As restaurações foram armazenadas em agua destilada a 37ºC durante 24 horas, polidas, moldadas e submetidas à ciclagem mecanica. A avaliacao do desgaste foi feita através utilizando a escalaM-L e o perfilografo. Foram encontrados materiais diferentes para os materiais testados, dependento do metodo de avaliacao utilizado. Na escala M-L o desgate entre Dispersalloy, Surefil e Z250 nao foi diferente, enquanto que no perfolografo o Dispersalloy apresentou menos desgaste que as resinas Surefil e Z250 (p<0,01). A avaliação do desgaste pela escala M-L foi subestimada em relação ao método do perfilógrafo (p<0,05).