Mandibular implant-supported overdentures: a prospective evaluation of the burden of prosthodontic maintenance with 3 different attachment systems.
Mandibular implant-supported overdentures: a prospective evaluation of the burden of prosthodontic maintenance with 3 different attachment systems.
复制标题
下颌种植体支持的覆盖义齿：对 3 种不同附着系统的修复维护负担的前瞻性评估。
DOI：
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发表时间：
2000
影响因子：
2.3
通讯作者：
Y. Solomons
中科院分区：
文献类型：
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作者：
A. Payne;Y. Solomons
目的
一项关于下颌种植覆盖义齿的前瞻性研究评估了这样一种假设，即违反公认的生物力学原理将导致不必要的修复维护。
材料和方法
一项针对59名无牙列患者的随机前瞻性试验详细介绍了3年间52颗下颌覆盖义齿(11颗未夹板，41颗夹板)的修复维护和并发症。
结果
无论设计如何，第一年的口腔修复维持量都比随后的几年要大。与圆棒夹板设计的比较显示，无论是固位夹激活还是骨折，在统计学上都没有显著差异。在2-种植体(单圆棒)设计中，超过70%的固位夹需要激活，相比之下，3-种植体(双圆棒)或4-种植体(三圆棒)设计的固位夹需要激活的比例为44%。种植3颗或4颗的患者中有30%的患者发生固位性夹状骨折，使用2颗种植体的患者中有16%的患者发生固位性骨折。无论设计如何，重新修复覆盖义齿，发现40%的覆盖义齿存在过度的维护负担。有21%的患者需要重建覆盖义齿。
结论
在下颌覆盖义齿治疗中，多根圆棒夹板固定3个或4个种植体仍是一种治疗理念。这项设计的前瞻性评估结果显示，与用单根圆棒夹板固定的2颗种植体相比，修复过程中夹子激活的修复维持较少，但夹子断裂较多，尽管在统计学上没有显著水平。
PURPOSE
A prospective study on mandibular implant-supported overdentures using more than 2 Brånemark implants splinted with multiple round bars evaluated a hypothesis that unnecessary prosthodontic maintenance would result from the contravention of accepted biomechanical principles.
MATERIALS AND METHODS
A randomized prospective trial on 59 edentulous patients details prosthodontic maintenance and complications of 52 mandibular overdentures (11 unsplinted, 41 splinted) over a 3-year period.
RESULTS
Prosthodontic maintenance was greater in the first year than in subsequent years, regardless of design. Comparison between the splinted designs with round bars revealed no statistically significant difference with either retentive clip activation or fractures. More than 70% of the retention clips in the 2-implant (single round bar) design needed activation, as compared to 44% of those with the 3-implant (double round bar) or 4-implant (triple round bar) design. Retention clip fracture occurred in 30% of patients with 3 or 4 implants and 16% of those with 2 implants. Relining the overdentures, regardless of design, revealed an excessive maintenance burden in 40% of overdentures. Remaking of overdentures was necessary in 21% of patients.
CONCLUSION
Multiple round bars splinting 3 or 4 implants can still be a treatment concept in mandibular overdenture treatment. Results from prospective evaluation of this design indicate less prosthodontic maintenance of clip activation but more clip fractures than with 2 implants splinted with single round bars, although not at statistically significant levels.