ABSTRACT
The purpose of this study was to evaluate the influence of blood contamination before or after surface treatment on adhesion of 4-META/MMA-TBB resin. After bovine root dentin surfaces were contaminated with blood before or after dentin surface treatment with 10-3 solution, the contaminated surface was rinsed with water, air-dried, or re-treated with 10-3 solution. Dye leakage and microtensile bond strength (MTBS) of 4-META/MMA-TBB resin to dentin were measured after storage in water for 24 h. When blood contamination occurred before surface treatment, there was no significant difference in the leakage value and MTBS as compared with that of the uncontaminated group. When blood contamination occurred after surface treatment, the leakage value increased and MTBS significantly decreased (p<0.05) even if the blood was washed away. However, when the surface was re-treated with 10-3 solution after rinsing with water, the leakage value and MTBS were restored to those of the uncontaminated group.
Subject(s)
Blood , Boron Compounds/chemistry , Dental Bonding , Dentin/ultrastructure , Methacrylates/chemistry , Methylmethacrylates/chemistry , Resin Cements/chemistry , Tooth Root/ultrastructure , Adhesiveness , Air , Animals , Carbon Compounds, Inorganic/chemistry , Cattle , Caustics/chemistry , Chlorides/chemistry , Citric Acid/chemistry , Coloring Agents , Dental Bonding/methods , Dental Leakage/classification , Dental Stress Analysis/instrumentation , Erythrocytes/ultrastructure , Ferric Compounds/chemistry , Fibrin/ultrastructure , Humans , Microscopy, Electron, Scanning , Rosaniline Dyes , Silicon Compounds/chemistry , Stress, Mechanical , Surface Properties , Tensile Strength , Time Factors , Water/chemistryABSTRACT
BACKGROUND: Bone perforation may induce bone marrow cell migration into a collagen sponge onlay implant. This study investigated the efficacy of bone perforation and collagen sponge onlay placement with regard to new bone formation. METHODS: One hundred sixty femurs of 80 Wistar male rats were used in four groups: bone perforation and sponge (PS) group: after perforating the femur, fibrillar and heat-denatured collagen (FC-HAC) sponges were placed on the femur; sponge (S) group: a FC-HAC sponge was placed directly on the femur without bone perforation; perforation (P) group: femur perforation without collagen sponge placement; and control (C) group: neither bone perforation nor sponge placement was used. Histologic and histomorphometric analyses were performed after the surgery. RESULTS: Numerous osteoblastic and fibroblastic cells were seen during the early repopulation in and at the periphery of the sponge in the PS group. These cells were seen only at the periphery of the sponge in the S group. In the PS group, angiogenesis was noted frequently, and it exhibited significantly greater new bone area compared to the other groups at days 14 and 28. CONCLUSION: The use of the FC-HAC sponge on the bone perforation area seemed to promote bone augmentation by possibly acting as a scaffold for the bone marrow cells as well as maintaining the space that is necessary for bone growth to occur.
