BACKGROUND Several modern designs of metal-backed glenoids (MBG) have been devised to overcome flaws such as loosening and a high failure rate. This review aimed to compare rates of complications and revision surgeries between cemented polyethylene glenoid (PEG) and three examples of modern MBG designs. METHODS Literature search was carried out using PubMed, Cochrane Library, EMBASE, and Google Scholar using MeSH terms and natural keywords. A total of 1186 articles were screened. We descriptively analyzed numerical data between the groups and statistically analyzed the categorical data, such as the presence of radiolucent line, loosening, and revision surgery (failure). Articles were divided into three groups based on follow-up duration: < 36-month, 36-72-month, and > 72-month subgroups. RESULTS This study included 35 articles (3769 shoulders); 25 on cemented PEG and ten on the modern MBG. Mean age was 66.4 (21-93) and 66.5 years (31-88). The mean duration of follow-up was 73.1 (12-211) and 56.1 months (24-100). Overall, the rate of the radiolucent line was 354/1302 (27%) and 47/282 (17%), the loosening rate was 465/3185 (15%) and 22/449 (5%), and the failure rate was 189/3316 (6%) and 11/457 (2%), for PEG and MBG, respectively. The results of < 36-month and 36-72-month subgroups showed lower rates of radiolucency and loosening in the cemented PEG group, but there was no significant difference in failure rate (P = 0.754 and 0.829, respectively). In the > 72-month subgroup, MBG was better in terms of loosening (P < 0.001) and failure rates (P = 0.006). CONCLUSIONS The modern MBG component, especially TM glenoid, seems to be a promising alternative to cemented PEGs, based on subgroup revision rates according to the follow-up duration and overall results of ROM and clinical scores. All polyethylene glenoids tend to increase loosening and failure over time. Three modern MBG designs seem to have no difference in failure, at least in the < 36-month and 36-72-month subgroups compared to the cemented PEG. More long-term follow-up studies on modern MBG should be ultimately conducted. LEVEL OF EVIDENCE Level IV, systematic review.

中文翻译：

---

全肩关节置换术后的松动率和翻修率：对全聚乙烯关节盂和金属支持关节盂的三种现代设计进行的系统评价。

背景技术已经设计了几种金属背衬关节盂（MBG）的现代设计来克服诸如松动和高故障率的缺陷。这篇综述的目的是比较骨水泥聚乙烯盂（PEG）与现代MBG设计的三个示例之间的并发症和翻修手术的发生率。方法使用MeSH术语和自然关键字，使用PubMed，Cochrane Library，EMBASE和Google Scholar进行文献搜索。总共筛选了1186篇文章。我们描述性地分析了各组之间的数值数据，并统计分析了分类数据，例如是否存在射线可透线，松动和翻修手术（失败）。根据随访时间将文章分为三组：<36个月，36-72个月和> 72个月的亚组。结果本研究共纳入35篇文章（3769条肩膀）。在胶结PEG上为25，在现代MBG上为10。平均年龄为66.4岁（21-93）和66.5岁（31-88）。平均随访时间为73.1（12-211）和56.1个月（24-100）。总体而言，射线可透线的合格率为354/1302（27％）和47/282（17％），松动率为465/3185（15％）和22/449（5％），失败率为PEG和MBG分别为189/3316（6％）和11/457（2％）。小于36个月和36-72个月的亚组的结果显示，胶凝PEG组的放射线透过率和松动率较低，但失败率没有显着差异（分别为P = 0.754和0.829）。在> 72个月的亚组中，MBG在放松（P <0.001）和失败率（P = 0.006）方面更好。结论现代的MBG组件，特别是TM关节盂，根据ROM持续时间，ROM的整体结果和临床评分，根据亚组修订率，似乎可以替代骨水泥PEG。随着时间的流逝，所有聚乙烯类关节盂往往会增加松动和衰竭。与胶结PEG相比，至少在<36个月和36-72个月的亚组中，三种现代MBG设计的失败率似乎没有差异。最终应该对现代MBG进行更多的长期随访研究。证据级别第四级，系统审查。与固定PEG相比，分别有36个月和36-72个月的亚组。最终应该对现代MBG进行更多的长期随访研究。证据级别第四级，系统审查。与固定PEG相比，分别有36个月和36-72个月的亚组。最终应该对现代MBG进行更多的长期随访研究。证据级别第四级，系统审查。