背景:大跨度牙桥可能会对基牙和牙周区造成过大的负荷,这可能会导致牙桥骨折或牙周问题。然而,一些报告显示,短跨度和大跨度桥梁可以提供类似的预后。这项临床研究旨在研究与不同跨度长度的固定假牙(FDP)相关的技术并发症。
方法:在随访期间对所有先前患有骨水泥性FDP的患者进行临床检查。登记了一些与FDP有关的数据,比如设计,材料类型,location,和并发症的类型。分析的主要临床因素为技术并发症。当检测到技术并发症时,进行生命表生存分析以计算FDP的累积生存率。
结果:该研究检查了229例患者,总共258例假体,平均随访98个月。七十四个假体出现技术并发症,最常见的并发症是陶瓷骨折或碎裂(n=66),而保留丢失发生在11个假体中。长跨度假体的长期评估显示,与短跨度假体相比,技术并发症发生率明显更高(P=,003)。短期FDP的累积生存率在第5年为91%,第10年为68%,第15年为34%。对于大跨度的FDP,5年的累积生存率为85%,10年为50%,15年为18%.
结论:长期评估后,与短跨度假体相比,长跨度假体(5个或更多)可能与更高的技术并发症发生率相关。
Long-span dental bridges may cause excessive load on abutment teeth and the periodontal area, which may lead to bridge fractures or periodontal problems. However, some reports have revealed that short- and long-span bridges can provide a similar prognosis. This clinical
study aimed to investigate the technical complications associated with fixed dental prostheses (FDPs) of different span lengths.
All patients with previously cemented FDPs were clinically examined during their follow-up visits. Several data related to FDPs were registered, such as design, material type, location, and type of complication. The main clinical factors analyzed were technical complications. Life table survival analyses were performed to calculate the cumulative survival rate of FDPs when technical complications were detected.
The
study examined 229 patients with a total number of 258 prostheses and an average of 98 months of follow-up. Seventy-four prostheses suffered from technical complications, and the most common complication was ceramic fracture or chipping (n = 66), while loss of retention occurred in 11 prostheses. The long-term evaluation of long-span prostheses revealed a significantly higher technical complication rate compared to short-span prostheses (P = ,003). The cumulative survival rate for short-span FDPs was 91% in year 5, 68% in year 10, and 34% in year 15. For long-span FDPs, the cumulative survival rate was 85% in year 5, 50% in year 10, and 18% in year 15.
Long-span prostheses (5 units or more) can be associated with a higher technical complication rate compared to short-span prostheses after long-term evaluation.