超声引导下经皮注射生物蛋白胶治疗医源性假性动脉瘤(附8例报道)

目的探讨超声引导下瘤腔内注射医用生物蛋白胶治疗医源性假性动脉瘤的可行性和安全性。方法采用22G穿刺针,对8例医源性假性动脉瘤患者行超声引导下瘤腔内注射生物蛋白胶,利用二维及彩色多普勒超声观察瘤腔的封堵情况,术后监测远端肢体动脉搏动,并定期随访。结果 8例患者均一次性封堵成功,生物胶用量2～4ml,瘤腔封堵时间10～40s。术后无肢体动脉栓塞和过敏反应,随访1周假性动脉瘤无复发。结论采用超声引导下瘤腔内注射生物胶治疗医源性假性动脉瘤是一种创伤小、安全、快捷有效的治疗方法。     

Behaviour of different bioactive glasses incorporated in polydimethylsiloxane endodontic sealer

ObjectivesThe aim of this study was to analyze the behavior of different bioactive glass fillers (BAGs) embedded in a polydimethylsiloxane matrix of an endodontic sealer.MethodsThree different endodontic sealers were fabricated using S53P4, 45S5 and 18?06 glass fillers. Endodontic sealer Guttaflow Bioseal consisting of polydimethylsiloxane (PDMS) matrix was used as base of the experimental sealers. Behaviors of different glass fillers leaching from polymer matrix was studied in vitro for 14 days by measuring static ion dissolution profiles of Si, Na, Ca and P -ions. In addition, pH of the simulated bodyfluid (SBF) was monitored during the 14 days and all the sealer samples was examined with SEM/EDX analysis on the surface. Identical but non-glass filler containing polydimethylsiloxane-based sealer was used as a control material.ResultsBy the time point of 24 h sealer with 45S5 had released twice as much of Si-ions compared to sealer with S53P4. No statistical differences of Na, Ca and P -ions dissolution were observed in the first 168 h for any groups whereas concentrations of Ca and P -ions decreased with 45S5 significantly after 336 h. Highest pH was measured for sealers with glass filler 45S5 and S53P4 (7.64–7.65). Visible mineral precipitation was observed only on sealer surfaces after 336 h’ time period with groups of 45S5 and S53P4. However, presence of calcium and phosphorus oxides was confirmed only with 45S5.SignificanceBioactive glass type 45S5 outperforms S53P4 and 18?06 by acting more dynamically in vitro set-up