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Evaluation of 4 different bone graft substitutes and autogenous bone grafting in root-end resection osteotomies after retrograde root-filling with Intermediate Restorative Material(IRM):An experimental study in dogs

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Open Journal of Stomatology 2013年第2期3卷 203-208页

作者： Dan-Ake Walivaara Peter Abrahamsson Maxillofacial Unit Halmstad Hospital HallandHalmstadSweden

Purpose: To investigate the periapical tissue response after root end filling with intermediate restorative material (IRM) and filling of the root-end resection bone defects with autogenous bone or a bone graft substitute in comparison to empty controls. Materials and Methods: Vital roots of the second, third and fourth mandibular premolars in six healthy mongrel dogs were apectomized. The root canals were prepared and sealed with IRM following a standardized surgical procedure. The resection bone defects were either filled with autogenous bone (PB) or one of the bone graft substitutes;CERAMENTTM|bone VOID FILLER, ChronOS?, TigranTM PTG, Easygraft? CLASSIC or left empty. After 120 days the animals were sacrificed and the specimens were analyzed radiologically and histologically. Kruskal-Wallis and Mann-Whitney tests were performed for statistical evaluation. Results: 34 sections were analyzed histologically. The evaluation revealed a variation in the outcome amongst the tested options, regarding reestablishment of the periapical bone healing and inflammatory infiltration in the sections. According to the tested variables, there was no statistical significant difference between the materials when comparing all groups as a whole. When comparing individual materials to each other there was statistical differences among some of the tested materials. Conclusion: The healing outcome after periapical surgery of a five-wall resection defect could not be increased by infill with autogenous bone or bone graft substitutes. The most important factor for the healing outcome in periapical surgery is the quality of the root-end sealing. The healing outcome after some of the tested bone substitutes, might be improved by longer healing time.

关键词： bone graft substitutes Periapical Surgery Autogenous bone Intermediate Restorative Material

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两种新型骨诱导鱼骨源衍生双向磷酸钙骨移植替代物的制备和表征（英文）

两种新型骨诱导鱼骨源衍生双向磷酸钙骨移植替代物的制备和表征（...

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2020中华口腔医学会口腔修复学专业委员会第十四次全国口腔修复学学术会议

作者：陈彤朱庆丰王少海上海长海医院

Many studies have reported on the conversion of natural resources into xenografts with hydroxyapatite(HA) as major component, but the extraction of biphasic calcium phosphate(HA/β-TCP) from animal bones and transformation into bone graft substitutes are rarely reported. In this research, two kinds of fish bones were made into granular porous biphasic calcium phosphate bone graft substitutes with particle sizes between 500 to 1000 um through a series of preparation procedures(Salmo salar calcined at 900°C named Sa900 and Anoplopoma fimbria calcined at 800°C named An800). The chemical composition was characterized by X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR). The morphology and porous structure of the scaffolds were comparatively analyzed by scanning electron microscopy(SEM) and mercury porosimeter. The specific surface area of materials was measured by the nitrogen adsorption technique based on BET theory. Cytotoxicity and ectopic osteogenesis were also carried out to investigate the biocompatibility and osteoinductive potential of these materials. The results showed that both fishbone-derived scaffolds were composed of HA and β-TCP with different proportions, and numerous interconnected pores with different sizes were observed at the surface of materials. An800 had higher total porosity reaching 74.8% with higher interconnectivity and micropores mostly distributed at 0.27 um and 0.12 um, while Sa900 had a higher specific surface area and higher intraparticle porosity with nanopores mostly distributed at 0.07 um. CCK-8 assays and Live/dead staining demonstrated excellent biocompatibility. Material-induced osteoid formation were observed on the interface of both internal pores and periphery of materials after implantation in muscle pouch of Wistar rats for 8 weeks which indicated some extent of osteoinductive potential of materials. The possible mechanism of material-induced osteogenesis and the effects of chemical composition, surface t

关键词： Biphasic calcium phosphate bone graft substitutes Biocompatibility Osteoinductivity Ectopic osteogenesis

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