Com o objetivo de avaliar histopatologicamente o comportamento pulpar pós-cimentação de coroas totais metálicas (CTM) com um cimento de fosfato de zinco (Lee Smith, Vigodent) e dois cimentos de ionômero vítreo (Ketac-Cem, ESPE; Vidrion C, SS WHITE), foram realizados 27 preparos coronários em pré-molares íntegros indicados para exodontia com a finalidade de tratamento ortodôntico. As exodontias foram realizadas após 3, 10 e 30 dias da cimentação. Para o exame histopatólogico, a polpa foi removida do dente e corada pelo hematoxilina e eosina. Os resultados mostraram que aos 3 dias, seis das nove polpas apresentavam alguma reação inflamatória, o comportamento entre os cimentos foi diferente quanto ao grau de resposta inflamatória, a reação inflamatória persistiu após 30 dias com o Lee Smith (CFZ) e Ketac-Cem (CIV), o grupo do Vidrion C (CIV) foi o que apresentou melhor biocompatibilidade.

The purpose of this study was to conduct an histological evaluation of pulp rections of teeth after cementation of complete metal crowns with one of the followinlg luting agents: zinc phosphate cement (ZPC) (Lee Smith, Vigodent) and two glass ionomer cements (Ketac-Cem, ESPE, Rdrion C, SS-WHITE). Twenty-seven sound bicuspids scheduled for extraction by orthodontic treatment were prepared for complete crowns, casts were made and luted with one of the above cements. Three, ten and thirty days after cementation the teeth were removed, split in two halves and the pulps detached from one of the halves, stained with HE and pulpal reactions assessed by optical microscopy. Results showed dissimilar inflammatory responses that were associated to the different cementing agents. For specimens of the ZPC and Ketac-Cem groups the inflammatory reaction subsided for 30 days. For the Vidnon C group only 2 out of 9 specimens showed pulpal inflammatory reactions. Therefore, regarding biocompatibility, best results were seen with the specimens of the Vidrion C group.