骨水泥与非骨水泥固定在初次全膝关节置换术中的应用:系统评价和meta分析

背景:全膝关节置换术(TKA)治疗终末期膝关节疾病的效果已被公认。目前TKA中假体-骨的固定形式主要有骨水泥固定和非骨水泥固定两种;前者应用广泛,但理想的假体固定方法仍存在争议。目的:通过meta分析评价骨水泥或非骨水泥固定在初次TKA中的优缺点,探讨其不同的适应证并提出TKA的最佳固定方式。方法:通过检索策略检索PubMed、The Cochrane Library、EMbase、CNKI、VIP、CBM和万方数据库,收集所有TKA术中骨水泥和非骨水泥固定的报道,采用RevMan 5.1软件进行meta分析。结果:最终纳入17项研究,并对其报道的结局指标进行合并分析。其中9项研究报道了TKA术后5年内的膝关节假体生存率,发现骨水泥固定组与非骨水泥固定组间生存率有显著统计学差异(RR=1.02,95%CI:1.00~1.05,P=0.02),但5年后的膝关节假体生存率无统计学差异(RR=1.01,95%CI:0.97~1.04,P=0.75)。术后假体相关并发症,骨水泥与非骨水泥固定组间无显著统计学差异(RR=0.97,95%CI:0.75~1.27,P=0.84)。影像学指标:术后两组间胫骨组件位置在冠状位及矢状位上偏移度数存在统计学差异,其他指标无统计学意义。结论:非骨水泥固定TKA植入组件发生偏转的概率相对较高,但非骨水泥固定TKA在假体中期生存率和临床疗效方面与骨水泥固定结果相似。为了更全面、准确地评价骨水泥固定与非骨水泥固定的长期生存率、安全性、临床及放射学指标,还需进一步研究。     

Stem fixation in revision total knee arthroplasty: a comparative analysis

Methods of stem fixation are a controversial aspect of revision TKA. We sought to determine which technique was superior by reviewing 475 revision TKAs done between 1986 and 2000. Of these 475 revisions, 286 major component revisions were done using 484 extended stems for fixation. Patients who died, patients who had less than 2 years follow up, or patients who had diaphyseal engaging stems were excluded from the study. The final data set included 113 revision TKAs with 202 metaphyseal engaging stems. Of the 202 stems, 107 were cemented whereas 95 were press-fit metaphyseal engaging stems. One hundred one of these were femoral stems and 101 were tibial stems. Using a modified Knee Society radiographic scoring system, 100 (93%) of the 107 implants with cemented stems were considered stable, seven (7%) were categorized as possibly loose requiring close followup, and none were loose. Of the 95 implants placed with cementless stems, only 67 (71%) were categorized as stable. Eighteen (19%) were possibly loose requiring close followup and 10 (10%) were loose (two tibial and eight femoral implants). We currently would urge caution in using cementless metaphyseal engaging stems for fixation in revision TKA.     

同期和分期双膝关节置换安全性的Meta分析

[目的]比较双膝关节置换的同期和分期治疗的主要并发症差异,系统评价两种不同手术方式的安全性.[方法]检索Medline、Embase、Cochrane library、中国CBM,收集双膝关节置换的同期和分期治疗的对照试验,提取数据进行分析,采用统计软件RevMan5.0.18进行Meta分析.[结果]纳入18个临床对照试验,共101 084例手术,其中SB-TKA 26 536例,Staged B-TKA 74 548例.Meta分析的结果显示,前者术后1个月内死亡率(OR=2.92)、3个月内的死亡率(OR=2.11)和肺栓塞发生率(OR=2.46)均高于后者,两组比较有统计学差异.[结论]目前证据表明,双膝关节置换手术组的术后1个月内死亡率、3个月内的死亡率和肺栓塞率高于分期治疗手术组.围手术期主要死因是心肺并发症.但还需要开展更多高质量的临床随机对照试验以增加证据的强度.     

Barbed versus standard sutures in total knee arthroplasty: a meta-analysis

Introduction

The use of barbed sutures in various surgical specialities has shown lower operative time and equivalent wound complications. Use of barbed suture in total knee arthroplasty is still at nascent stage with only few studies comparing it with the standard closure techniques. The purpose of this review was to appraise the clinical outcomes of barbed suture use in closure of total knee arthroplasty.

Methods

We searched the Cochrane library, PubMed and EMBASE up to December 2014 for clinical trials comparing the outcomes of closure of total knee arthroplasty with barbed sutures versus standard sutures. When there was no high heterogeneity, we used a fixed effects model. Dichotomous variables were presented as risk ratios (RRs) with 95 % confidence intervals (CIs), and continuous data were measured as measured differences with 95 % CIs.

Results

Five studies were included, with sample size ranging from 178 to 416. Fixed effect analysis showed that superficial infection was higher with barbed suture (RR 1.54, 95 % CI 0.36–2.59, P = 0.94). The barbed sutures have significantly lower closure time (MI ?2.74, CI ?3.06, ?2.42, P < 0.00001). There was no difference in terms of deep infection, wound dehiscence, arthrofibrosis and total operative time.

Conclusion

Our meta-analysis showed that the use of barbed sutures was associated with increased superficial infection rate and shorter estimated closure time. More RCTs are needed to examine the efficacy and safety of the barbed sutures.

     

Systematic review of patellar resurfacing in total knee arthroplasty

Controversies existing over resurfacing the patella in total knee arthroplasty remain in the literature. The purpose of this review was to evaluate the effectiveness of resurfacing versus nonresurfacing the patella in total knee arthroplasty. We searched the Cochrane Library, MEDLINE and EMBASE for published randomised clinical trials relevant to patellar resurfacing. The relative risk of reoperation was significantly lower for the patellar resurfacing group than for the nonresurfacing group (relative risk 0.57, 95% confidence interval 0.38–0.84, P = 0.004). The overall incidence of postoperative anterior knee pain of the 1,421 knees included was 12.9% in the patellar resurfacing group and 24.1% in the nonresurfacing group. The existing evidence indicates that patellar resurfacing can reduce the risk of reoperation with no improvement in postoperative knee function or patient satisfaction over total knee arthroplasty without patellar resurfacing. Whether it can decrease the incidence of anterior knee pain remains uncertain.     

髌骨置换与否对全膝关节置换术疗效影响的Meta分析

[目的]系统评价髌骨置换与不置换髌骨的全膝关节置换术的术后疗效.[方法]收集1966～2010发表的所有比较髌骨置换与不置换髌骨伞膝关节置换后疗效的随机对照试验,对其逐个进行质量评价,提取关于置换后再手术率、前膝痛发生率、患者满意率及各种评分系统测评的膝关节评分的改善,并作系统评价.[结果]11个随机对照试验共纳入1 473例膝,置换髌骨与未置换组的再次手术率差异有显著性意义(相对危险度=0.54,95%可信区间为0.35～0.84);未置换髌骨组再次接受手术的概率比较大.置换髌骨与未置换组的置换后前膝疼痛发生率差异有显著性意义(相对危险度=0.53,95%可信区间为0.39～0.71).置换髌骨与未置换组的术后患者满意率差异无显著性意义(相对危险度=1.14,95%可信区间为0.74～1.76).置换髌骨与未置换组的术后KSS评分差异无显著性意义(加权均数差=1.15,95%可信区间为-0.23～2.53).[结论]置换髌骨的全膝关节置换术中,远期随访再手术率、置换后前膝痛发生率低于未置换髌骨组,患者满意率及置换后膝关节KSS评分方面,两种髌骨处理方式无显著性差异.由于纳入文献质量差异较大,对此结论的解释应保持谨慎.     

CT- versus MRI-based patient-specific instrumentation for total knee arthroplasty: A systematic review and meta-analysis

Background

To determine whether computed tomography (CT) or magnetic resonance imaging (MRI) is more suitable for the patient-specific instrumentation (PSI) systems for total knee arthroplasty (TKA).

Cement or cementless fixation in total knee arthroplasty?

A prospectively studied group of 59 knees with cementless fixation were compared to a retrospectively studied but matched group of 59 knees with cement fixation using a Press Fit Condylar prosthesis. The only significant preoperative difference between the patient groups was mean age; the cemented group was on average nine years older than the cementless group (p less than 0.0001). At an average of 2.8 years after surgery, there were no significant differences in knee scores between the two groups. Radiolucent lines adjacent to the tibial component were similar in both groups. The complication rate of 20% in the cementless knees was higher than the 12% rate in the cemented knees; this was primarily related to polyethylene wear of metal-backed patellar components. Cement or cementless fixation of this prosthesis appears to provide equivalent early results.     

保留和不保留后交叉韧带全膝置换疗效的Meta分析

[目的]比较全膝关节置换中保留和不保留后交叉韧带的临床结果,评价两种治疗选择的疗效差异。[方法]检索Medline(1966～2010.1)、Embase(1980～2010.1)、Cochrane library(2010.1)、CBM(1990～2010.1)等数据库,收集比较保留和不保留后交叉韧带全膝关节置换的随机对照试验,系统评价各研究方法学质量,并采用RevMan5.0.18进行Meta分析。[结果]纳入12个随机对照试验,共1 441膝,其中保留组697膝,不保留组744膝。组间比较术后半年至5年的临床疗效差别不大,Meta分析结果:膝评分、关节活动度、本体感觉和运动觉、并发症率等方面均无明显的统计学差异,但3个质量较高研究的关节活动度的统计权重明显偏向非保留组。[结论]目前证据表明膝关节置换中保留和不保留后交叉假体全膝关节置换的临床疗效差别无明显的统计学意义,但非保留组的关节活动度有大于保留组的倾向。建议开展更多高质量、大样本的随机对照试验以增加证据的强度。     

One-peg versus three-peg patella component fixation in total knee arthroplasty.

In many designs of total knee arthroplasty, the patella with one central peg has been replaced by a patella with three small pegs for cement fixation. There have been recent reports of failure of this design. This is a prospective, consecutive study of two types of patella component fixation in 228 posterior-stabilized knee arthroplasties done by one surgeon. A central peg all-polyethylene component was used for 84 consecutive knees in 63 patients (Group A) and a three-peg patella was used for the next 144 consecutive knees in 99 patients (Group B). The mean followup was 6.7 years (range, 2-10 years) for Group A and 3.5 years (range, 2-6 years) for Group B. Except for the patellar component fixation, all knees had the same posterior-stabilized prosthesis using a specific protocol for patellar resurfacing. No patient required reoperation for a patellofemoral complication. The prevalence of patella fracture was higher in Group A, 4.7% (four knees), compared with 2.1% (three knees) in Group B, but this difference was not statistically significant. The presence of anterior knee pain referable to the patella was 7.1% (five patients, six knees) in Group A (one patient with two knees had severe anterior knee pain) and 9% (13 knees in 13 patients) in Group B. There was no patella clunk syndrome, subluxation, or fracture of a fixation peg in either group. With this specific protocol for patella resurfacing, there was a higher rate of complications with the one central peg patella (4.7%) than with the three-peg patella (2.1%), but this did not reach statistical significance. The results do not support an increased risk of component failure with this three-peg patella design, but do not, at this length of followup, show any significant advantage of three-peg fixation.     

Non-continuous versus continuous wound drainage after total knee arthroplasty: a meta-analysis

Purpose

So far, controversy still exists regarding the use of non-continuous or continuous wound drainage after total knee arthroplasty. The aim of this study was to assess the efficacy and safety of these two drainage techniques after total knee arthroplasty.

Methods

We searched the established electronic literature databases of Pubmed, Embase, Cochrane Library, CNKI, VIP and WANFANG. Nine RCTs including a total of 761 patients involving 811 knees were eligible for this meta-analysis.

Results

Our results showed that non-continuous drainage was associated with less haemoglobin loss (WMD,  −0.43, 95 % CI −0.62 to −0.24; P < 0.00001) and postoperative visible blood loss (WMD,  −305.09, 95 % CI −408.10 to −202.08; P < 0.00001) compared with continuous drainage. No significant difference was found between the two groups in terms of range of motion (WMD, 0.99, 95 % CI −1.01 to 2.98; P = 0.33), incidence of blood transfusion (OR, 0.63, 95 % CI 0.38 to 1.06; P = 0.80) or postoperative complications (OR, 1.09, 95 % CI 0.35 to 3.40; P = 0.89).

Conclusion

The existing evidence indicates that non-continuous drainage can achieve less haemoglobin loss (especially the four- to six-hour drain clamping) and postoperative visible blood loss with no increased risk of postoperative complications compared with continuous drainage.     

Hybrid component fixation in total knee arthroplasty: minimum of 10-year follow-up study

Hybrid total knee arthroplasty (TKA) (uncemented femur with cemented tibia and patella) was introduced in the late 1980s to gain the theoretical advantage of durable cementless femoral fixation while avoiding the problems noted with cementless tibial fixation. From December 1992 to July 2000, 215 patients (235 knees) who underwent hybrid TKA were enrolled in this study. Five types of prosthesis (AGC, Maxim, LCS-M, LCS-APG, and Scorpio) were used. Revision rate for aseptic loosening was 16 (6.8%) of 235 knees. At 10 and 15 years, survivorship with tibial or femoral revision as the end point was 0.95 and 0.92, respectively. Hybrid TKA provides durable fixation with clinical and radiographic performance at minimum 10 years comparable with cemented series.     

膝关节置换术中髌骨置换与非髌骨置换比较的Meta分析

[目的]系统评价全膝关节置换术中髌骨置换与否对术后疗效的影响,为临床治疗提供参考。[方法]全面搜索国内外关于膝关节置换术中髌骨置换和非髌骨置换的随机对照研究资料,按照既定的纳入、排除标准,核定检出符合评价标准的文献,提取所需研究数据,采用RevMan 4.2软件进行Meta分析。[结果]纳入随机对照研究16篇,共计1 922例膝关节置换术。Meta分析结果显示,髌骨置换组术后5年内发生膝前痛的风险降低,加权后RR=0.53,95%CI(0.30,0.94),但5年后二者无明显统计学差异。髌骨置换组术后5年以上发生再手术的风险低,加权后RR=0.35,95%CI(0.18,0.66),但5年内二者无明显统计学差异。膝关节KSS评分不论是亚组分析还是总体分析,均无统计学差异。总体分析结果,KSS评分加权均数差值为0.44,95%CI(-1.22,2.09)。[结论]全膝关节置换术中髌骨置换与非髌骨置换相比,术后5年内膝前痛发生率低,术后5年以上再手术的风险低,关节评分无明显差别。髌骨置换与非髌骨置换的优劣仍需大规模多中心的RCT来进一步研究。     

全膝关节置换术后引流管短期夹闭与持续开放相比较的Meta分析

[目的]应用Meta分析的方法,评价全膝关节置换术(total knee arthroplasty,TKA)后短期夹闭引流管对术后失血量及手术并发症的影响.[方法]计算机检索Pubmed、EMBASE、Ovid和Cochrane图书馆关于TKA术后对引流管短期夹闭和持续开放进行比较的随机对照试验,按照文中所述纳入标准收集后进行比较,利用RevMan 5.0软件进行异质性分析及Meta分析,绘制森林图.[结果]本文检索了1979～2009年间发表的1688篇关于TKA术后比较引流管短期夹闭和持续开放影响的文献,经过筛选和评价,最后收集到已发表的6篇(共603例患者)随机对照试验,符合本次Meta分析所纳入的试验标准.结果发现夹闭组患者术后引流量显著减少,两组在血红蛋白下降值、患者输血率、患膝活动度和术后并发症上差异无统计学意义(95%显著区间有重叠).[结论]现有临床研究结果尚不支持在TKA术后短期夹闭引流管方法疗效优于持续开放引流管方法.     

膝关节骨关节炎患者初次全膝关节置换术中选择髌骨置换的Meta分析

目的探讨膝关节骨关节炎(OA)进行初次全膝关节置换术(TKA)中选择髌骨置换与否的疗效,评价两种不同治疗选择的差异。方法检索Medline、Embase、Cochranelibrary、CBM,收集膝关节OA行初次TKA术中髌骨置换与否的临床对照试验,提取数据分析,采用RevMan5.0.18进行Meta分析。结果纳入8个前瞻性随机对照试验,共822例手术,其中髌骨置换组373例,髌骨非置换组444例。髌骨置换与非置换组比较,前膝痛与KSS评分均无明显的统计学意义(P0.5),置换组的因髌股关节问题而再次手术率低于非置换组[RR=0.53,95%CI(0.29,0.96),P=0.04],但置换组再次手术的原因除了常见的前膝痛,还包括髌骨假体相关的并发症。结论膝关节OA的患者行初次TKA术中选择髌骨置换与否的前膝痛与KSS评分无明显的统计学意义,置换组的因髌股关节问题再次手术率低于非置换组,但置换组再次手术的复杂性大于非置换组。     

全膝关节置换中固定平台假体和活动平台假体相比较的Meta分析

[目的]应用Meta分析的方法,评价全膝关节置换术(total knee arthroplasty,TKA)中应用固定平台型假体(fixed bearing total knee arthroplasty,FB)和活动平台型假体(mobile bearing total knee arthroplasty,MB)的疗效差异,为临床选择适当类型假体进行TKA术提供依据。[方法]计算机检索Pubmed、EMBASE、Ovid和Cochrane图书馆关于TKA术中应用FB和MB的随机或半随机对照试验,按照文中所述纳入标准收集后进行比较,利用RevMan5.0软件进行异质性分析及Meta分析,绘制森林图。[结果]本文检索了1979～2009年间发表的1 718篇关于TKA术中应用FB和MB的文献,经过筛选和评价,最后收集到已发表的14篇(共1 305例患者)随机或半随机的对照试验,符合本次Meta分析所纳入的试验标准。结果发现两组在KSS评分、关节活动度、患者满意率、放射学指标和假体相关并发症上差异无统计学意义(95%显著区间有重叠)。[结论]相对MB的先进设计理念,现有临床研究结果尚不支持在TKA术中应用MB疗效显著优于FB。     

Long-term followup of cementless versus hybrid fixation for total knee arthroplasty.

In a prospective trial, 99 patients (100 knees) with osteoarthritis were randomized to either cementless or hybrid fixation of cruciate-retaining Miller-Galante-I total knee arthroplasties between January 1987 and December 1988. Thirty-one patients died during the study period and two additional patients were lost to followup, leaving 67 total knee arthroplasties for analysis. Thirty-nine patients underwent revision surgery at an average of 6.9 years postoperatively. The main reason for revision surgery was failure of metal-backed patellas with 25 knees revised at an average of 7.4 years, and the second most common reason was tibial polyethylene failure. Survival curves showed 60% survival at 14 years for all knees, and 85% survival at 14 years when failures for metal-backed patellas and infection were excluded, with no significant difference between the two groups. Failure of metal-backed patellas was significantly higher in the cementless group. Tibial polyethylene failure occurred in five of the hybrid group and none of the cementless group, but this was not a significant difference. Surviving prostheses were assessed at an average of 12.8 years (range, 11.5-13.5 years). Average clinical scores were 94.8 points preoperatively, and 143 points at the latest followup, with significantly higher scores in the hybrid group. Differences in outcome between the two groups were not sufficiently significant to recommend one method of fixation over another. With elimination of poor design features related to the patellofemoral articulation and thin tibial polyethylene, cruciate-retaining total knee arthroplasties can yield good durable results, whether cementless or hybrid fixation is used.     

Patellar resurfacing versus nonresurfacing in total knee arthroplasty: A meta-analysis of randomised controlled trials

Purpose

Patella resurfacing or nonresurfacing in total knee arthroplasty remains controversial. The aim of this study was to evaluate the efficacy of patellar resurfacing through an evaluation of the current literature.

Methods

We carried out a meta-analysis of randomised controlled trials comparing total knee arthroplasties performed with and without patellar resurfacing. Outcomes of reoperation, anterior knee pain and knee scores were analysed.

Results

Fourteen trials assessing 1,725 knees were eligible. The absolute risk of reoperation was reduced by 4 % (95 % confidence interval, 2–6 %) in the patellar resurfacing arm (between-study heterogeneity, P = 0.05, I² = 42 %), implying that one would have to resurface 25 patellae (95 % confidence interval, 17–50 patellae) in order to prevent one reoperation. There was no difference between the two groups in terms of anterior knee pain, knee pain score, Knee Society score and knee function score. But in the studies followed up for a mean time of not less than five years, a difference was found between the two arms in Knee Society scores (RR = 2.14, 95 % confidence interval, 0.76–3.52; P = 0.002).

Conclusions

The available evidence indicates that patellar resurfacing reduces the risk of reoperation after total knee arthroplasty. Patellar resurfacing patients may make a difference in long-term follow-up (five or more 5 years) of Knee Society scores. In other aspects, the benefit of patellar resurfacing is limited. Additionally, more carefully and scientifically designed randomised controlled trials are required to further prove the claim.