all-bond-2 and Dental-Pulp-Exposure

The purpose of this study was to evaluate pulpal responses to the use of four resin composite materials as direct pulp capping agents. The importance and effects of individual pulp capping variables are not well understood; consequently histomorphometric analysis was used to analyze these variables.. Two hundred fifty standardized pulp-exposed cavities were prepared in nonhuman primate teeth. Exposed pulps were capped with calcium hydroxide and multistep and self-etching primer resin composites. Teeth were collected from 3 to 60 days to observe pulpal reactions. Following perfusion fixation, tissues were demineralized, sectioned, stained, and histomorphometrically measured. Bridge area, diameter of pulpal exposure, and cavity floor width were measured. Tunnel defects, operative debris, and pulpal inflammation were graded according to defined criteria.. The variables correlated to dentinal bridge area were, in decreasing order of significance, time elapsed since exposure, diameter of pulpal exposure, pulp capping material, and tunnel defects. The variables correlated to pulpal inflammation were the type and curing of pulp capping material. Other variables were not statistically significant.. Pulp capping with resin composite materials provided acceptable pulpal inflammatory and dentinal bridge repair responses, comparable with those of calcium hydroxide. Although resin composites are promising as direct pulp capping agents, further investigations are required to optimize their application protocols to reduce the penetration of potentially cytotoxic monomers into pulpal tissue.

Topics: Acid Etching, Dental; Animals; Boron Compounds; Calcium Hydroxide; Composite Resins; Dental Pulp; Dental Pulp Capping; Dental Pulp Exposure; Dentin-Bonding Agents; Dentin, Secondary; Macaca; Methacrylates; Methylmethacrylates; Minerals; Pulpitis; Resin Cements; Time Factors

This study evaluated the biologic ability of sodium hypochlorite to control hemorrhage via chemical amputation of the coagulum, to remove dentin chips, to assist healing, and to facilitate formation of a dentinal bridge under two adhesive systems.. Ninety Class V cavities with mechanical pulpal exposures were placed in the teeth of five adult monkeys and histologically observed. All exposures were prepared with a No. 330 bur, and hemorrhage was controlled with 3% sodium hypochlorite. Twenty-two exposures were capped with All-Bond 2 and AElitefil, and 26 exposures were capped with One-Step (OS) and Resinomer (RS). Two pulps were excluded from the final data. Forty-two exposures were capped with calcium hydroxide and amalgam as controls. At 7, 27, and 90 days, tissues were obtained by perfusion fixation, demineralized, sectioned, stained, and histologically graded according to published qualitative criteria.. For both adhesives, at 7 days, 12 of 16 pulps showed no coagulum remnants or dentin chips at the material interface. No necrotic pulps were observed. At 27 and 97 days, 26 of 30 capped pulps had dentinal bridges at the adhesive interface. Reparative dentin was present in 28 pulps. Four 97-day pulps exhibited necrosis associated with stained bacteria. One 97-day pulp contained dentin chips throughout the pulp and demonstrated no healing, no reparative dentin, and no stained bacterial profiles.. Normal soft tissue reorganization and dentinal bridge formation were observed in 86% of pulps treated with sodium hypochlorite and either adhesive system.

Topics: Animals; Bisphenol A-Glycidyl Methacrylate; Calcium Hydroxide; Composite Resins; Dental Amalgam; Dental Pulp Capping; Dental Pulp Diseases; Dental Pulp Exposure; Dental Pulp Necrosis; Dental Restoration, Permanent; Dentin-Bonding Agents; Dentin, Secondary; Hemorrhage; Hemostatics; Macaca mulatta; Methacrylates; Resin Cements; Root Canal Irrigants; Silanes; Silicon Dioxide; Sodium Hypochlorite; Time Factors; Wound Healing