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首页> 外文期刊>Clinical oral implants research >Fracture behavior, marginal gap width, and marginal quality of vented or pre‐cemented CAD CAD / CAM CAM all‐ceramic crowns luted on Y‐ TZP TZP implants
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Fracture behavior, marginal gap width, and marginal quality of vented or pre‐cemented CAD CAD / CAM CAM all‐ceramic crowns luted on Y‐ TZP TZP implants

机译：断裂行为，边缘间隙宽度和粘固的CAD CAD / CAM CAM凸轮凸轮凸轮的边缘质量，在Y-TZP TZP植入物上铺平

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Abstract Objectives To investigate the fracture behavior and marginal gap region of CAD / CAM fabricated lithium disilicate (L) and zirconium dioxide (Z) crowns using palatal venting ( PV ), pre‐cementation with custom analogs ( CA ), or conventional cementation technique ( SP ) with adhesive cement (A) or resin‐modified glass ionomer cement (B). Material and methods Twelve groups ( n ?=?6) were set according to material (L, Z), cement (A, B), and technique ( PV , CA , SP ). Specimens were thermo‐mechanical aged ( TML ), loaded until fracture ( LF ) and fracture patterns recorded. Marginal gap width and quality were assessed and compared to replicas obtained before and after TML . Results Crown material significantly influenced LF with a mean of 1037.6?±?282.4?N in L and 5356.3?±?1207.0?N in Z groups ( p? ? .001). Neither cement material nor cementation method affected the outcome. Fractures occurred along the mesial‐distal central fissure in both materials. Gap width before TML was 22.04?±?13.42?μm for L and 19.98?±?12.72?μm for Z specimens, with overall no influence of crown material, cement type, or method. Marginal cleanliness just below the polished implant shoulder reached 66.7%–88.9% with A, and 91.7%–100% with B, and tended to increase in all groups during TML indicating a decrease in excess cement. Implant‐crown junctions were cleaner with B compared to A ( p? ≤ ? .001) and along Z crown surfaces compared to L ( p? ≤ ? .007). Conclusions Crown venting of lithium disilicate and zirconium dioxide crowns did not affect the fracture load and patterns. Complete cement removal was rare, and the observed particle ablation requires further clinical attention, particularly with submucosal margins.
机译：摘要目的，研究CAD / CAM制造的锂峰（L）和二氧化锆（Z）冠状术的裂缝行为和边缘间隙区域使用腭通气（PV），用定制类似物（CA）的预胶化或常规胶结技术（ SP）具有粘合水泥（A）或树脂改性的玻璃离聚物水泥（B）。材料和方法根据材料（L，Z），水泥（A，B）和技术（PV，CA，SP）设定12个基团（N？=α6）。标本是热机械老化（TML），装载直到骨折（LF）和记录的断裂模式。评估边缘间隙宽度和质量，并与TML之前和之后获得的复制品进行比较。结果冠状材料显着影响LF，平均值为1037.6？±282.4Ω，在Z组中为5356.3？±1207.0·n。（p≤≤001）。既不影响结果也不影响结果。裂缝沿两种材料中的间隔中心裂缝发生。在TML之前的间隙宽度为22.04°+±13.42μm，L和19.98？±12.72Ω·μm为Z样品，总体无影响冠状材料，水泥型或方法。抛光植入物肩部的边缘清洁度达到66.7％-88.9％，B且91.7％-100％，B且在TML期间倾向于所有群体，表明水泥减少。植入冠状交叉点用B与（p≤≤≤001）和Z冠状表面相比，与L（p≤≤007）相比，与Z冠状表面相比清洁。结论冠状锂峰和二氧化锆冠的牙齿通风不影响骨折载荷和图案。完全除去稀有稀有，观察到的颗粒消融需要进一步的临床关注，特别是粘膜缘。

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