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以3只比格犬为实验对象,采用RealsealTM系统充填根管,AH Plus糊剂加牙胶尖充填作为对照,术后7、30、90d处死动物,通过X线片和组织学切片对犬牙根尖周的组织反应进行评价。结果:各试验牙X线片示根充严密,各期均未见明显根尖周稀疏区及充填材料吸收。组织学结果显示,7d时,根尖周组织表现为中度的炎性反应;30d时大部分标本表现为轻度的炎性反应;90d时大部分标本的根尖周组织结构已恢复正常。各观察期两组间差异无统计学意义(P>0.05)。结论:RealsealTM组的根尖周反应和牙胶尖/AH Plus组相似,两者均具有可接受的生物相容性。
Three Beagle dogs were used as experimental subjects, and root canal was filled with RealsealTM system. AH Plus paste and gutta percha were used as controls. Animals were sacrificed at 7, 30 and 90 days after operation. Periapical tissue response was evaluated. Results: The X-ray films of test teeth showed tight root filling, and no obvious apical sparse area and filling material absorption were observed in each period. The results of histology showed that periapical tissues showed moderate inflammatory reaction on the 7th day, mild inflammatory reaction on the 30th day, and the apical organization of most of the specimens returned to normal on the 90th day. There was no significant difference between the two observation periods (P> 0.05). Conclusion: The periapical responses of the RealsealTM group were similar to those of the gutta percha / AH Plus group, both of which had acceptable biocompatibility.