Resin luting materials: Tissue response in dog's teeth.
The aim of this study was to evaluate radiographically and histologically the pulpal and periapical response to self-adhesive (Rely X™ Unicem) and self-etching and self-curing (Multilink(®)) resin-based luting materials in deep cavities in dogs' teeth. Deep class V cavities (0.5-mm-thick dentin) were prepared in 60 canine premolars and the following materials were applied on cavity floor: Groups I/V-RelyX™ Unicem; Groups II/VI-Multilink(®); Groups III/VII-zinc phosphate cement (control) and; Groups IV/VIII-gutta-percha (control). Cavities were restored with silver amalgam. Animals were euthanized after 10 days (groups I-IV) and 90 days (groups V-VIII). Tooth/bone blocks were radiographed and processed for histopathological evaluation of pulp and periapical tissue response to the materials. All materials presented similar histopathological features and radiographic findings at both periods. The pulp tissue was intact. The apical and periapical regions and periodontal ligament thickness were normal. No inflammatory cells, resorption of mineralized tissue (dentin, cementum, and alveolar bone) or bacteria were observed. The lamina dura was intact and no areas of periapical bone rarefaction or internal/external root resorption were observed radiographically. It can be concluded that Rely X™ Unicem and Multilink(®) caused no adverse tissue reactions and may be indicated for cementation of indirect restorations in deep dentin cavities without pulp exposure.
Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Osvaldo L
OL
Bezzon
Department of Prosthodontics, Dental School, San Luis Potosi University, San Luis Potosi, Mexico.
Daniella S H
DS
Rivera
Department of Pediatric Dentistry School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Raquel A B
RA
Silva
Department of Pediatric Dentistry School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Daniela S B
DS
Oliveira
Department of Endodontics, Dental School, San Luis Potosi University, San Luis Potosi, Mexico.
Daniel
D
Silva-Herzog
Department of Pediatric Dentistry School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Paulo
P
Nelson-Filho
Department of Pediatric Dentistry School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Marília P
MP
Lucisano
Department of Pediatric Dentistry School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Léa A B
LA
Silva
D000818:Animals; D001641:Bicuspid / Q000000981:diagnostic imaging*; D003731:Dental Caries / Q000473:pathology*; D003737:Dental Cavity Preparation; D003738:Dental Cements / Q000009:adverse effects*; D004285:Dogs; D011859:Radiography; D012117:Resins, Synthetic / Q000008:administration & dosage* / Q000009:adverse effects*
D003738:Dental Cements; D012117:Resins, Synthetic
deep dentin cavities; resin cements; tissue response