THE KNEE 是一本国际期刊，发表关于该关节的临床治疗和基本生物力学特征的研究。该杂志的目的是为外科医生、生物医学工程师、成像专家、材料科学家、康复人员和所有对膝关节感兴趣的人提供一种工具。涵盖的主题包括但不限于：• 解剖学、生理学、形态学和生物化学；• 生物力学研究；• 假肢、矫形器和增强装置的开发进展；• 成像和诊断技术；• 病理学；• 创伤；• 手术；• 康复。

The Knee is an international journal that focuses on clinical treatments and fundamental biomechanical characteristics of the knee joint. The journal aims to provide a platform for surgeons, biomedical engineers, imaging specialists, materials scientists, rehabilitation professionals, and anyone interested in the knee joint. Topics covered include but are not limited to: anatomy, physiology, morphology, and biochemistry; biomechanical studies; advancements in prosthetics, orthotics, and augmentation devices; imaging and diagnostic techniques; pathology; trauma; surgery; and rehabilitation.

《Knee》是一本国际期刊，专注于膝关节的临床治疗和基本生物力学特征的研究。该期刊旨在为外科医生、生物医学工程师、成像专家、材料科学家、康复人员以及所有对膝关节感兴趣的研究者提供一个交流平台。涵盖的主题包括但不限于：解剖学、生理学、形态学和生物化学；生物力学研究；假肢、矫形器和增强装置的开发进展；成像和诊断技术；病理学；创伤；手术；康复。

Knee

The goal of all surgical and orthopaedic training is to ensure necessary education and surgical skills without compromising the quality of operations or patient safety. Anterior cruciate ligament reconstruction (ACLR) is a common multi-staged orthopaedic surgical procedure with a learning curve. Previous studies focus mainly on learning or the learning curve of one surgeon and tunnel placements. The aims of this study were to define the learning curve in arthroscopic ACLRs, define the number of procedures needed before the surgical "knifetime" plateaus, examine the effect of experience on complications, and identify possible individual differences in the surgical learning curve.The study included the first 50 consecutive ACLR operations of five orthopaedic surgeons, thus, a total of 250 patients. For comparison and statistical analysis, patients were arranged into five groups, each comprising 50 patients (=order group). Order group 1 comprised the first 10 patients operated on by each of the five surgeons, group 2 patients 11-20, group 3 patients 21-30, group 4 patients 31-40, and group 5 the last 10 patients. The learning curve was defined with a LOESS curve. Surgical time and complications, including graft failure and postoperative knee instability, were analysed between order groups and between surgeons.Median surgical time was 105 (interquartile range 82-124) min. The learning curve showed the first steep decline in surgical time and started to settle slowly after 20 reconstructions. Surgical time was significantly longer when order group 1 was compared with order group 2 (p = 0.031), and when order group 1 was compared separately with order groups 3, 4, and 5 (p < 0.001). Operation order alone explained only 17.1% of the alteration in surgical time. No significant difference emerged in graft failure rate between the order groups or the surgeons. Objective instability of the knee showed a significant difference when order group 1 was compared separately with order group 3 and with order group 4 (p = 0.004). Surgical time differed between surgeons (p < 0.001), and the shape of the learning curve showed great individual variability.In the first 10 to 20 ACLR operations, the surgical time was longer and the complication rate higher, but thereafter both started to settle down. We recommend that first 10-20 ACLR operations should be supervised.

Marjo Talme

Arsi Harilainen

Jan Lindahl

Ville Bister

The Knee

Anterior cruciate ligament reconstruction learning curve study – Comparison of the first 50 consecutive patients of five orthopaedic surgeons during a 5-year follow-up

前交叉韧带重建学习曲线研究——五位骨科医生在5年随访期间前50例连续患者的比较

Stiffness following total knee arthroplasty (TKA) is a disabling problem resulting in pain and reduced function.

Conal Quah

Girish Swamy

James Lewis

John Kendrew

Nitin Badhe

Fixed flexion deformity following total knee arthroplasty. A prospective study of the natural history.

The purpose of the current study was to investigate the effect of knee flexion contracture on the knee mechanics both in affected and contralateral limbs during gait. Ten healthy old women, with mean age of 62 years, participated. Unilateral knee flexion contractures of 0, 15, and 30 degrees were simulated with a knee brace. All subjects performed walking trials with or without the simulation. Net knee extension moments, net knee adduction moments (%BW Ht), external knee forces (%BW), and maximum axial loading rate (%BW/s) at the knee were calculated both in contracture side and non-contracture side under different contracture conditions. Bilateral net knee extension moment gradually increased as the angle of contracture increased. The net knee extension moments in non-contracture limb were significantly larger with 15 and 30 degrees contracture than those without the contracture. Net knee adduction moment in non-contracture limb significantly increased with 15 and 30 degrees contracture. The knee shearing forces in contracture side and the knee compressive force in non-contracture side also significantly increased with 15 and 30 degrees simulation. As the flexion contracture became greater than 15 degrees , maximum axial loading rate also significantly increased in non-contracture side. From our results, the knee flexion contracture greater than 15 degrees led to mechanical overloads in both limbs. Correction of the contracture is clinically important to avoid any adverse effect.

Kengo Harato

Takeo Nagura

Hideo Matsumoto

Toshiro Otani

Yoshiaki Toyama

Yasunori Suda

Knee flexion contracture will lead to mechanical overload in both limbs: a simulation study using gait analysis.

膝关节屈曲挛缩会导致双下肢机械性过载：一项基于步态分析的仿真研究。

This study aimed to systematically review the literature and identify factors which would contribute to the intraoperative correction of FFD to frame a potential surgical algorithm or predictive model to guide intraoperative decision-making.

Vincent V G An

Corey J Scholes

Brett A Fritsch

Factors affecting the incidence and management of fixed flexion deformity in total knee arthroplasty: A systematic review.

全膝关节置换术后固定屈曲畸形的发生及处理的影响因素：一项系统综述。

Lateral unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) are both reliable treatment options for patients with isolated lateral osteoarthritis (OA). However, studies comparing both procedures are scarce. Aims of this study were to (I) compare short-term functional outcomes following lateral UKA and TKA and (II) assess the role of patient characteristics on outcomes as measured by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC).In this retrospective cohort study, 82 patients (48 undergoing lateral UKA and 34 undergoing TKA) were identified that presented with lateral OA and completed the WOMAC. Independent t-tests were used to compare outcomes following lateral UKA and TKA.Mean follow-up was 2.8 years (range: 2.0 - 5.0 years). Preoperatively, no differences between lateral UKA and TKA were seen (50.1±13.5 and 53.3±17.1, respectively, p=0.551). Postoperatively, lateral UKA patients reported better overall outcomes than TKA (90.5±11.7 vs. 81.8±17.9, p=0.017). Subgroup analysis showed better outcomes following lateral UKA than TKA in patients younger than 75 years (92.1±9.9 vs. 81.3±19.6, p=0.014) and in females (91.6±9.9 vs. 81.0±18.2, p=0.014).These findings indicate that lateral UKA has superior short-term functional outcomes compared to TKA in patients with isolated lateral OA. Better outcomes were especially seen in younger patients and females. These findings may help orthopedic surgeons choose treatment for patients presenting with lateral OA and optimize treatment for individual patients.

J.P. van der List

H. Chawla

H.A. Zuiderbaan

A.D. Pearle

Patients with isolated lateral osteoarthritis: Unicompartmental or total knee arthroplasty?

孤立性外侧骨关节炎患者：单髁置换还是全膝关节置换？

To determine incidence of posterior-tibial-slope (PTS) distribution in patients with isolated posterior-cruciate-ligament (PCL) tear, as-well-as the effect of PTS on radiological, clinical, and functional outcomes after PCL-reconstruction (PCL-R).

Silvampatti Ramasamy Sundararajan

Owais Ahmed

Rajagopalakrishnan Ramakanth

Terence Dsouza

Mahshook Irfan

Arumugam Palanisamy

Shanmuganathan Rajasekaran

Lesser posterior tibial slope angle ≤70 (PTS-Angle) has negative effect on outcome of isolated PCL reconstruction: Comparative analysis of PTS ≤70 vs &gt; 70 degrees

后胫骨斜坡角度较小（PTS-Angle）≤70度对单纯PCL重建结果有负面影响：PTS ≤70度与> 70度的比较分析

The tibial tuberosity-trochlear groove (TT-TG) distance is an important reference for the evaluation of patellar instability. However, measurement of the TT-TG distance has disadvantages with relatively low reproducibility. This study aimed to investigate the reliability of patellar tendon lateral deviation angle (PTLD-A) measured on a single computed tomography (CT) slice and the clinical significance for predicting patellar instability.

Zhu Dai

Jian Li

Juan Tan

Zhijun Yang

Zhihao Gong

Patellar tendon lateral deviation angle: a new computed tomography scan measurement for evaluation of patellar instability

髌腱侧偏角：评估髌骨不稳的新型计算机断层扫描测量方法

Energy conversion efficiency of human gait can be evaluated by calculating the ratio of conversion of mechanical energy from vertical motion to horizontal motion of the center of gravity through the movement of the joints. Osteoarthritis (OA) of the knee joint impairs this energy conversion efficiency. Total knee arthroplasty is the standard treatment for knee OA. However, its effect on energy conversion efficiency is unclear. In this study, we investigated how energy conversion efficiency changed in the gait of patients with knee OA before and after surgery.

Ruido Ida

Gen Kuroyanagi

Yoshino Ueki

Satona Murakami

Takayuki Shiraki

Daiki Shimotori

Hideki Okamoto

Kunio Yamada

Total knee arthroplasty improves energy conversion efficiency during walking in patients with knee osteoarthritis

全膝关节置换术可提高膝骨关节炎患者行走时的能量转换效率

Intraoperative challenges and complications and their course over experience in total knee arthroplasty (TKA) applications in hemophilic arthropathy have seldom been studied. Our study aimed to analyze the learning dynamics and the evolving perspective of a single arthroplasty surgeon in hemophilic knees.

Arman Vahabi

Elcil Kaya Biçer

Semih Aydoğdu

Total knee arthroplasty in hemophilic knees requires its own learning phase: Lessons learned from 90 cases

血友病膝关节的全膝关节置换术需要其自身的学习阶段：90例病例的教训

Unrestricted kinematically aligned total knee arthroplasty (unKA TKA) strives to restore the pre-arthritic posterior tibial slope (PTS), however consistency of achieving this alignment target is unknown. The present study determined the proportion of subjects with differences in PTS less than 2° from the target and the improvement in patient-reported function after unKA TKA.

Alexander J Nedopil

Stefano Ghiradelli

S M Howell

M L Hull

Does the posterior tibial slope in caliper-verified unrestricted kinematically aligned TKA using manual instruments match the slope in the contralateral healthy knee and improve function?

使用手动器械进行卡规验证的无限制运动学对齐全膝关节置换术后胫骨后倾角是否与对侧健康膝关节匹配并改善功能？

Abbreviation	Knee
Journal Impact	1.58
Quartiles(Global)	SURGERY(Q2)

ISSN	0968-0160, 1873-5800
h-index	94

Publication Information	Publisher: Elsevier B.V.，Publishing cycle: Quarterly，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 1994，Proportion of original research papers: 88.95%，Self Citation Rate:6.20%， Gold OA Rate: 13.77%
Average review cycle	网友分享经验：一般,3-8周
Average recruitment ratio	网友分享经验：容易

Knee

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