Early patellar tendon rupture after total knee arthroplasty: A direct repair method

BACKGROUND Patellar tendon rupture after total knee arthroplasty(TKA)is a catastrophic complication.Although the occurrence of this injury is rare,it can lead to significant dysfunction for the patient and is very tricky to deal with.There has been no standard treatment for early patella tendon rupture after TKA,and long-term follow-up data are lacking.AIM To introduce a direct repair method for early patella tendon rupture following TKA and determine the clinical outcomes and complications of this method.METHODS During the period of 2008 to 2021,3265 consecutive TKAs were retrospectively reviewed.Twelve patients developed early patellar tendon rupture postoperatively and were treated by a direct repair method.Mean follow-up was 5.7 years.Demographic,operative,and clinical data were collected.The clinical outcomes were assessed using the Western Ontario and McMaster Universities(WOMAC)score,the Hospital for Special Surgery(HSS)score,knee range of motion,extensor lag,and surgical complications.Descriptive statistics and paired t test were employed to analyze the data.RESULTS For all 12 patients who underwent direct repair for early patellar tendon rupture,3 patients failed:One(8.3%)for infection and two(17.6%)for re-fracture.The two patients with re-fracture both underwent reoperation to reconstruct the extensor mechanism and the patient with infection underwent revision surgery.The range of motion was 109.2°±10.6°preoperatively to 87.9°±11°postoperatively,mean extensor lag was 21°at follow-up,and mean WOMAC and HSS scores were 65.8±30.9 and 60.3±21.7 points,respectively.CONCLUSION This direct repair method of early patellar tendon rupture is not an ideal therapy.It is actually ineffective for the recovery of knee joint function in patients,and is still associated with severe knee extension lag and high complication rates.Compared with the outcomes of other repair methods mentioned in the literature,this direct repair method shows poor clinical outcomes.

Comparison between direct repair and humana cellular nerve allografting during contralateral C7 transfer to the upper trunk for restoration of shoulder abduction and elbow flexion

Direct coaptation of contralateral C7 to the upper trunk could avoid the interposition of nerve grafts. We have successfully shortened the gap and graft lengths, and even achieved direct coaptation. However, direct repair can only be performed in some selected cases, and partial procedures still require autografts, which are the gold standard for repairing neurologic defects. As symptoms often occur after autografting, human acellular nerve allografts have been used to avoid concomitant symptoms. This study investigated the quality of shoulder abduction and elbow flexion following direct repair and acellular allografting to evaluate issues requiring attention for brachial plexus injury repair. Fifty-one brachial plexus injury patients in the surgical database were eligible for this retrospective study. Patients were divided into two groups according to different surgical methods. Direct repair was performed in 27 patients, while acellular nerve allografts were used to bridge the gap between the contralateral C7 nerve root and upper trunk in 24 patients. The length of the harvested contralateral C7 nerve root was measured intraoperatively. Deltoid and biceps muscle strength, and degrees of shoulder abduction and elbow flexion were examined according to the British Medical Research Council scoring system;meaningful recovery was defined as M3–M5. Lengths of anterior and posterior divisions of the contralateral C7 in the direct repair group were 7.64 ± 0.69 mm and 7.55 ± 0.69 mm, respectively, and in the acellular nerve allografts group were 6.46 ± 0.58 mm and 6.43 ± 0.59 mm, respectively. After a minimum of 4-year follow-up, meaningful recoveries of deltoid and biceps muscles in the direct repair group were 88.89% and 85.19%, respectively, while they were 70.83% and 66.67% in the acellular nerve allografts group. Time to C5/C6 reinnervation was shorter in the direct repair group compared with the acellular nerve allografts group. Direct repair facilitated the restoration of shoulder abduction and elbow flexion. Thus, if direct coaptation is not possible, use of acellular nerve allografts is a suitable option. This study was approved by the Medical Ethical Committee of the First Affiliated Hospital of Sun Yat-sen University, China (Application ID:[2017] 290) on November 14, 2017.

Animal models used to study direct peripheral nerve repair: a systematic review

Objective:Peripheral nerve repair is required after traumatic injury.This common condition represents a major public health problem worldwide.Recovery after nerve repair depends on several factors,including the severity of the injury,the nerve involved,and the surgeon’s technical skills.Despite the precise microsurgical repair of nerve lesions,adequate functional recovery is not always achieved and,therefore,the regeneration process and surgical techniques are still being studied.Pre-clinical animal models are essential for this research and,for this reason,the focus of the present systematic review(according to the PRISMA statement)was to analyze the different animal models used in pre-clinical peripheral nerve repair studies.Data sources:Original articles,published in English from 2000 to 2018,were collected using the Web of Science,Scopus,and PubMed databases.Data selection:Only preclinical trials on direct nerve repair were included in this review.The articles were evaluated by the first two authors,in accordance with predefined data fields.Outcome measures:The primary outcomes included functional motor abilities,daily activity and regeneration rate.Secondary outcomes included coaptation technique and animal model.Results:This review yielded 267 articles,of which,after completion of the screening,49 studies were analyzed.There were 1425 animals in those 49 studies,being rats,mice,guinea pigs,rabbits,cats and dogs the different pre-clinical models.The nerves used were classified into three groups:head and neck(11),forelimb(8)and hindlimb(30).The techniques used to perform the coaptation were:microsuture(46),glue(12),laser(8)and mechanical(2).The follow-up examinations were histology(43),electrophysiological analysis(24)and behavioral observation(22).Conclusion:The most widely used animal model in the study of peripheral nerve repair is the rat.Other animal models are also used but the cost-benefit of the rat model provides several strengths over the others.Suture techniques are currently the first option for nerve repair,but the use of glues,lasers and bioengineering materials is increasing.Hence,further research in this field is required to improve clinical practice.

Reliability Evaluation of Two-Stage Directed Semi-Markov Repairable Network Systems

A two-stage directed Semi-Markov repairable network system is presented in this paper to model the performance of many transmission systems, such as power or oil transmission network, water or gas supply network, etc. The availability of the system is discussed by using Markov renewal theory, Laplace transform and probability analysis methods. A numerical example is given to illustrate the results obtained in the paper.

基于小型化Cas蛋白的CRISPR/Gal4BD-Cas供体适配基因编辑系统研究

在哺乳动物细胞中,利用同源引导修复(homology-directed repair,HDR)机制的基因编辑策略能够实现精准的点编辑和敲入,但是HDR的低效性严重制约了该策略在精准医疗和分子设计育种中的应用。鉴于HDR机制所需的供体DNA模板不能自主募集到基因组双链断裂(double-stranded break,DSB)处,本课题组提出了供体适配系统(donor adapting system,DAS)的概念并开发出CRISPR/SpCas9-Gal4BD供体适配基因编辑系统。由于SpCas9蛋白分子较大,与Gal4BD适配器结合不利于表达、病毒载体包装及活体递送等过程,因此本研究进一步采用两种小型化Cas蛋白——路邓葡萄球菌(Staphylococcus lugdunensis)源SlugCas9变体SlugCas9-HF与氨基酸球菌(Acidaminococcus sp.)源AsCas12a,开发了新型的CRISPR/Gal4BD-SlugCas9和CRISPR/Gal4BD-AsCas12a供体适配基因编辑系统。通过SSA活性报告实验初步证明了Gal4BD与SlugCas9、AsCas12a N-端融合对其打靶活性影响较小。通过HDR效率报告实验进行功能验证并优化供体设计方案,结果表明:对于CRISPR/Gal4BD-AsCas12a DAS,适配器结合序列(binding sequence,BS)与供体5′-端融合(BS-dsDNA)效果较好;对于CRISPR/Gal4BD-SlugCas9 DAS,则BS与供体3′-端融合(dsDNA-BS)较佳。最终,利用CRISPR/Gal4BD-SlugCas9 DAS对HEK293T细胞中的EMX1、NUDT5、AAVS1三个基因位点分别实现了24%、37%、31%的精准编辑,相比对照组得到了显著提高。本研究为供体适配基因编辑系统的进一步优化提供了参考和借鉴,为后续动物分子设计育种应用研究提供了新的基因编辑工具。

激光定向能量沉积Al-Mg-Sc-Zr修复5083-H112铝合金的组织和性能

激光定向能量沉积增材修复技术具有时间短、效率高、成本低、力学性能好等优点,具有很大的发展潜力。采用Al-7.5Mg-0.3Sc-0.28Zr作为修复材料对轨道交通用5083-H112铝合金进行激光修复实验,得到了致密、无缺陷的修复试样,并对其组织和性能进行研究,探讨了激光修复铝合金的可行性。结果表明,熔合线附近过渡区可划分为修复区、部分熔化区、热影响区和母材。修复区为完全等轴晶,由平均晶粒尺寸为4.95μm的细晶带和18.34μm的粗晶区组成。从修复区到部分熔化区再到热影响区的过渡区域,Al元素含量逐渐升高,Mg元素含量逐渐下降,硬度逐渐下降,修复后母材未被软化。由于激光增材制造技术的快速凝固,在熔合线附近的细晶带有较大的应力集中,由于较小的热输入在部分熔化区、热影响区的残余应力较小。修复试样的屈服强度为(152±2)MPa,为母材的89.4%;抗拉强度为(305±5)MPa,为母材抗拉强度的100%;伸长率为(15.5±0.5)%,为母材的85.2%;断裂发生在强度较弱的母材。高性能的激光修复铝合金是可实现的,具有广泛的应用前景。

复合树脂多层修复技术与复合树脂直接粘接修复技术在前牙间隙美学修复中的效果对比

目的:对比分析复合树脂多层修复技术与复合树脂直接粘接修复技术在前牙间隙美学修复中的效果。方法:纳入笔者医院2020年6月-2021年6月收治的98例(共104颗患牙)前牙间隙患者作为研究对象,按照随机数表法分为A组和B组,各49例。A组患者接受复合树脂多层修复技术,B组患者接受复合树脂直接粘接修复技术。对比两组修复效果、美学效果和治疗总费用,比较两组修复前和修复30d后、6个月后的咬合力、咀嚼效率和焦虑自评量表(Self-ratinganxietyscale,SAS)、抑郁自评量表(Self-rating depression scale,SDS)评分。结果:修复30 d后,A组优秀率高于B组(P<0.05),两组良好率和不良率比较无统计学意义(P>0.05)。修复6个月后,A组优秀率和不良率均高于B组(P<0.05),两组良好率比较无统计学意义(P>0.05)。患者的咬合力在时间、交互作用上差异有统计学意义(P<0.05),在组间作用上差异无统计学意义(P>0.05)。患者的咀嚼效率在时间、组间、交互作用上差异均有统计学意义(P<0.05)。修复6个月后,两组患者咬合力和咀嚼效率均较修复30d后和修复前升高,且A组咬合力和咀嚼效率高于B组(P<0.05)。A组修复后的边缘密合性、颜色匹配性、修复体崩裂、继发龋损、形态匹配、修复体脱落和牙龈健康评分均低于B组(P<0.05)。患者的SAS评分和SDS评分在时间、组间、交互作用上有统计学意义(均P<0.05)。修复30d后和修复6个月后,两组患者SAS和SDS评分均较修复前降低,且A组低于B组(P<0.05)。A组治疗总花费高于B组(P<0.05)。结论:与复合树脂直接粘接修复技术相比,在前牙间隙美学修复中应用复合树脂多层修复技术可取得更佳的修复效果,有助于恢复患者咬合力和咀嚼功能,使患者获得良好美学效果,改善其心理状态。但治疗总花费相对较高,临床治疗需结合患者经济情况选择合适治疗方案。

不同CRISPR/Cas9供体适配基因编辑系统的比较及优化研究

在哺乳动物细胞中进行基因敲入通常采用同源定向修复(homology-directed repair,HDR)机制将外源DNA模板整合到目标基因组靶点中。然而HDR效率往往较低,其中外源DNA模板与目标基因组靶点的共定位是关键限制因素之一。为提高CRISPR/Cas9系统介导的HDR效率,本团队及前人研究将不同接头蛋白与SpCas9蛋白融合表达,利用其与特异性DNA序列结合的特性,构建了多种CRISPR/SpCas9供体适配基因编辑系统。为了便于比较、优化不同CRISPR/Cas9供体适配系统,本研究利用这些系统在HEK293T细胞GAPDH和ACTB基因末位外显子3′-端进行了eGFP基因敲入,并采用了优化的供体DNA模板设计方式,通过PCR和Sanger测序检测敲入的准确性,流式细胞分析进行敲入效率的检测。结果表明,将yGal4BD、hGal4BD、hLacI、hTHAP11和N57等接头蛋白与SpCas9蛋白C-端融合对其活性均无显著性影响;在GAPDH位点上,SpCas9融合yGal4BD、hGal4BD、hLacI和hTHAP11的供体适配系统等均能显著提高敲入效率;在ACTB位点上,SpCas9融合yGal4BD和hGal4BD能显著提高敲入效率;且增加供体DNA模板中的结合序列(binding sequence,BS)数量,有利于提高SpCas9-hTHAP11系统介导的敲入效率。总之,本研究比较并优化了不同的CRISPR/Cas9供体适配基因编辑系统,为后续相关的基因编辑应用研究提供了参考和借鉴。

青年腰椎峡部裂手术直接修复治疗与非手术治疗的比较

目的回顾性分析直接修复(direct repair,DR)手术和非手术治疗对青年腰椎峡部裂患者的早期效果。方法选择2015年1月~2019年12月在该院就诊的151例青年腰椎峡部裂患者作为研究对象,根据患者治疗方法分为非手术组(79例,传统非手术治疗)和手术组(72例,螺钉固定直接修复),观察两组疼痛VAS评分、Oswestry功能障碍指数(Oswestry disability index,ODI)、12项简式健康调查量表(the 12-items short form health survey,SF-12)得分、缺损间隙距离和缺损愈合率。结果治疗后1个月、3个月、6个月、12个月时,两组患者VAS均较治疗前显著降低(P<0.05),但两组各时间段的VAS评分差异均无统计学意义(P>0.05)。治疗后1个月、3个月、6个月、12个月两组患者ODI指数呈降低趋势,SF-12评分呈升高趋势,差异均有统计学意义(P<0.05);两组患者各时间段的ODI指数和SF-12评分差异均无统计学意义(P>0.05)。治疗后12个月,非手术组腰椎滑脱发生率高于手术组(P<0.05);手术组患者峡部愈合率(75.00%)明显高于非手术组(P<0.05)。手术组并发症发生率高于非手术组(P<0.05)。结论DR手术和非手术治疗对患者腰部、功能障碍和生活质量的短期影响无显著差异,DR手术的并发症高于非手术治疗,但DR手术对抑制病变节段的前移具有积极作用。

电动汽车退役动力电池中LiFePO_(4)材料再生利用研究进展

随着“碳达峰、碳中和”目标的提出,新型环保的储能器件迎来了极大的发展前景。特别是,锂离子电池(Li B)凭借其能量密度高、使用寿命长等诸多优势在众多储能器件中脱颖而出。磷酸铁锂(LiFePO_(4))材料由于具有热稳定性好、循环次数高、服役时间长、无记忆效应等优势迅速成为电动汽车动力电池正极材料的主流。随着大规模LiFePO_(4)型电池退役浪潮的到来,如何处置和利用这些废旧电池已成为国内外亟需解决的热点问题。以LiFePO_(4)型电池的失效机理为基准,从宏观和微观两个角度分析了废LiFePO_(4)材料再生前后的变化,并从补偿锂和构建还原环境两个维度对废LiFePO_(4)材料直接再生技术的相关研究进展进行了综述,明确提出废LiFePO_(4)正极材料更适合走直接再生的回收路径,以期实现废LiFePO_(4)材料的科学回收。

“双碳”目标下“认购碳汇”司法适用的困境与完善

“认购碳汇”是我国环境司法实践中探索出的新型替代性修复方式,既能够满足生态环境的修复需求,也有助于实现我国碳达峰、碳中和战略目标。但现阶段“认购碳汇”的司法适用存在适用范围不明确、适用顺序混乱以及碳汇损失核算方法缺失等问题。为此,应当框定“认购碳汇”的适用范围,明确“认购碳汇”的适用顺序,规范碳汇损失核算的方式,以期为“认购碳汇”司法适用的完善提供具体路径。

透壁缝合法在日间腹腔镜疝修补术中固定直疝假性疝囊的效果

目的探讨透壁缝合法在日间腹腔镜疝修补术中固定直疝假性疝囊预防术后血肿的临床价值。方法选取2021年6月至2022年10月就诊于金华市人民医院行日间腔镜腹股沟直疝修补手术的81例男性患者作为研究对象,按照随机数字表法分为对照组(40例)与观察组(41例)。观察组患者采用透壁缝合法固定直疝假性疝囊,对照组患者术中使用钉枪法关闭假性疝囊。比较两组手术相关指标、术后2个月内血清肿的发生情况、相关并发症及术后1年内疝复发的发生情况。结果观察组Ⅱ型疝患者手术时间短于Ⅲ型疝患者,差异有统计学意义(P<0.05),Ⅱ型疝、Ⅲ型疝患者出血量、术后疼痛评分比较,差异无统计学意义(P>0.05)。观察组患者术后第1、7天VAS评分、总费用均低于对照组,差异有统计学意义(P<0.05)。观察组血清肿发生率低于对照组,差异有统计学意义(P<0.05)。观察组并发症总发生率低于对照组,差异有统计学意义(P<0.05),术后1年内两组疝复发率比较,差异无统计学意义(P>0.05)。结论日间腹股沟直疝修补术中使用透壁缝合法固定直疝假性疝囊对术后血清肿发生有预防作用,不仅患者疼痛程度减轻,医疗费用及围手术期相关并发症发生率也有所降低,可以促进患者康复,有利于日间疝的发展。

间接法树脂高嵌体修复与直接法树脂填充修复治疗磨牙残冠的疗效比较

目的 分析间接法树脂高嵌体修复与直接法树脂填充修复治疗磨牙残冠的临床效果。方法 按照治疗方法不同,将2022年1月至2023年12月南平市第一医院收治的80例磨牙残冠修复治疗患者分为2组,对照组40例患者实施直接法树脂填充修复,观察组40例患者实施间接法树脂高嵌体修复。比较两组患者地修复效果。结果 观察组患者修复成功率与生活质量评分均高于对照组(P<0.05)。结论 磨牙残冠采取间接法树脂高嵌体修复,可以提升修复美观度,且并发症少,效果显著,值得临床广泛推广及应用。

关节镜下转全层修复和部分修复关节侧部分肩袖损伤的疗效对比

目的 分析对于关节侧部分肩袖损伤患者分别采用关节镜下转全层修复和部分修复的效果。方法 随机选取莆田九十五医院骨科于2019年1月—2021年12月收治的50例关节侧部分肩袖损伤患者为研究对象,根据随机数表法分为对照组(关节镜下直接修复)和观察组(关节镜下转全层撕裂后修复),各25例。对比两组Constant-Murley肩关节功能评分(Constant-Murley Shoulder Function Score, CSS)、洛杉矶加利福尼亚大学评分(University of California Los Angeles Rating, UCLA)、临床效果。结果 观察组术后3、6个月的CSS评分为(57.09±6.11)、(79.32±5.23)分,高于对照组的(52.30±5.86)、(74.38±6.67)分,差异有统计学意义(t=2.829、2.914,P均<0.05)。观察组术后3、6个月的UCLA评分为(25.13±3.34)、(29.38±1.57)分,高于对照组的(22.84±3.04)、(27.94±1.64)分,差异有统计学意义(t=2.535、3.171,P均<0.05)。两组临床治疗总有效率对比,差异无统计学意义(P>0.05)。结论 对于关节侧部分肩袖损伤患者,分别采用关节镜下直接修复和关节镜下转全层撕裂后修复均可获得较为理想的效果,但关节镜下全层撕裂后修复术更有利于肩关节功能修复。

腹腔镜腹股沟直疝修补术中缝合关闭疝缺损对降低术后血清肿发生率和复发率的重要意义

目的 探究腹腔镜腹股沟直疝修补术中缝合关闭疝缺损对降低患者术后血清肿发生率和复发率的意义。方法 选取济源市人民医院2019年7月-2021年6月收治的需进行腹腔镜腹股沟直疝修补术的106例患者,以随机数字法分为两组(参照组、研究组),各53例。参照组术中不缝合疝缺损,研究组术中缝合关闭疝缺损,随访至术后3个月。对比两组术后疼痛时间、术中出血量、手术时间、术后下床活动时间、术后住院时间,术后7d及术后1、3个月血清肿积液量与血清肿发生率,术后安全性(术后发热、恶心呕吐、切口出血、头晕头痛)与术后3个月复发率,术前及术后3个月6项生活能力评分。结果 术后疼痛时间、术后下床活动时间、术后住院时间与参照组比,研究组缩短,手术时间与参照组比,研究组延长;术后7d及术后1、3个月血清肿积液量两组呈减少趋势,与参照组比,.研究组减少,血清肿发生率两组呈降低趋势,与参照组比,研究组下降;术后3个月与术前比两组6项.生活能力评分上升,与参照组比,研究组升高(P<005);两组术中出血量,术后发热、恶心呕吐、切口出血、头晕头痛总发生率比较无统计学差异(P>005),两组术后3个月均未复发。结论 腹腔镜腹股沟直疝修补术中缝合关闭疝缺损可缩短患者疼痛、下床及住院时间,减少血清肿积液量,降低术后血清肿发生率,安全性良好,且不会引起复发,同时提升患者生活质量,促进患者康复。

关于历史遗留废弃矿山生态修复方向的探讨

历史遗留废弃矿山是由多种原因形成,其涉及的点多面广,情况较为复杂,其生态修复措施涉及的部门较多,协调困难,矿山生态修复方向的确定为后续具体实施工作的顺利进行起到决定性的作用,本文根据工程实例就废弃矿山生态修复方向进行探索。

激光定向能量沉积技术的研究现状与应用进展

激光定向能量沉积(LDED)技术作为一种前沿增材制造技术,在材料加工和产品制造领域展现出显著优势,综述了LDED技术的发展历程、基本原理、技术特点及其在多个工业领域的应用现状。LDED技术能够有效提升材料利用率、缩短制造周期,并实现复杂零件的直接制造,尤其在航空航天、汽车制造和医疗等领域具有广泛应用前景。通过仿真分析、在线监测和闭环控制策略,LDED技术进一步提高了成形精度和产品质量。随着LDED技术的成熟和优化,该技术有望在降低成本、提升性能以及推动制造业绿色转型方面发挥更大作用。

基于多方位生态修复技术的河道水环境治理工程应用研究

本文探讨并分析了基于多方位生态修复技术的河道水环境治理工程应用。首先,河道水环境治理应遵循可持续发展、自然生态应用、综合治理的原则。其次,本文从多方位生态修复在河道水环境工程治理中的关键技术入手,分析了生态系统维护、人工净化技术、微生物菌剂治理技术。最后,以A示范河道治理为例,分析了多方位生态修复技术在河道水环境治理工程中的具体应用。

老年腹股沟疝患者腹腔镜疝修补术后发生血清肿的影响因素

目的:分析老年腹股沟疝患者腹腔镜疝修补术后发生血清肿的影响因素。方法:选取2021年1月至2023年11月该院收治的60例老年腹股沟疝患者进行横断面研究。所有患者均行腹腔镜疝修补术,术后随访3个月,根据术后是否发生血清肿将其分为发生组(n=14)和未发生组(n=46)。收集患者一般资料,采用Logistic回归分析老年腹股沟疝患者腹腔镜疝修补术后发生血清肿的影响因素。结果:60例老年腹股沟疝术后患者中,发生血清肿14例,占23.33%(14/60),包括Ⅰ型3例、Ⅱ型5例、Ⅲ型4例、Ⅳ型2例,未发生血清肿48例,占76.67%(46/60);两组性别、年龄、疝囊处理方式比较,差异均无统计学意义(P>0.05);发生组体质量指数(BMI)>24 kg/m^(2)、双侧疝、直疝、疝囊直径>4 cm、手术时间>60 min、术中出血量>10 mL、普通补片占比均高于未发生组,差异有统计学意义(P<0.05);Logistic回归分析结果显示,BMI>24 kg/m^(2)、双侧疝、直疝、疝囊直径>4 cm、手术时间>60 min、术中出血量>10 mL、普通补片均为老年腹股沟疝患者腹腔镜疝修补术后发生血清肿的危险因素(OR>1,P<0.05)。结论:BMI>24 kg/m^(2)、双侧疝、直疝、疝囊直径>4 cm、手术时间>60 min、术中出血量>10 mL、普通补片均为老年腹股沟疝患者腹腔镜疝修补术后发生血清肿的危险因素。

Water-facilitated targeted repair of degraded cathodes for sustainable lithium-ion batteries

Directly repairing end-of-life lithium-ion battery cathodes poses significant chal-lenges due to the diverse compositions of the wastes.Here,we propose a water-facilitated targeted repair strategy applicable to various end-of-life batches and cathodes.The process involves initiating structural repair and reconstruct-ing particle morphology in degraded LiMn_(2)O_(4)(LMO)through an additional thermal drive post-ambient water remanganization,achieving elemental repair.Compared to solid-phase repair,the resulting LMO material exhibits superior electrochemical and kinetic characteristics.The theoretical analysis highlights the impact of Mn defects on the structural stability and electron transfer rate of degraded materials.The propensity of Mn ions to diffuse within the Mn layer,specifically occupying the Mn 16d site instead of the Li 8a site,theoretically sup-ports the feasibility of ambient water remanganization.Moreover,this method proves effective in the relithiation of degraded layered cathode materials,yielding single crystals.By combining low energy consumption,environmental friendli-ness,and recyclability,our study proposes a sustainable approach to utilizing spent batteries.This strategy holds the potential to enable the industrial direct repair of deteriorated cathode materials.