Changes in sagittal ground reaction forces after intra-articular hyaluronate injections for knee osteoarthritis

OBJECTIVES: To examine the gait patterns and the sagittal ground reaction forces (GRFs) in persons with knee osteoarthritis (OA) after intra-articular injection of hyaluronate and to investigate the duration of its treatment effectiveness. DESIGN: Case-comparison study. SETTING: Gait laboratory in a tertiary care center. PARTICIPANTS: Fifteen subjects (30 knees) with symptomatic knee OA (stage I or II, according to the Ahlb?ck grading system), and 15 age-, mass-, and gender-matched non-OA control subjects (30 knees). INTERVENTION: After initial gait analysis, the group with knee OA received 5 weekly intra-articular injections of hyaluronate to bilateral knees. Gait analysis was performed again for the group with knee OA after the completion of hyaluronate injections. MAIN OUTCOME MEASURES: Forceplate sagittal GRFs and gait parameters of velocity, cadence, step length, and stride time. RESULTS: The distinctive 2-peak force vector GRF was lost in persons with knee OA. The first peak rise time was significantly delayed (P<.05). The group with knee OA also revealed slower walking velocity and cadence, as well as longer stride time, than the control group (P<.05). The distinctive 2-peak force vector GRF diagram could be recovered in patients with knee OA after the completion of hyaluronate injections. CONCLUSIONS: Gait patterns and GRFs improved significantly after intra-articular knee injection of hyaluronate in persons with Ahlb?ck stages I and II knee OA. The clinical treatment effect was immediate and may last for 6 months or more.     

膝骨性关节炎双侧同期全膝关节置换和单侧膝关节置换的比较

背景：双膝重度骨性关节炎患者,选择双膝同期全膝关节置换或选择单侧全膝关节置换在安全性和临床疗效方面存在争议。目的：比较双膝重度骨性关节炎患者,双膝同期关节置换和单膝关节置换的安全性及临床疗效。方法：将拟行全膝关节置换的双膝重度骨关节炎患者60例（90膝）分为2组：单膝组（30例,30膝）行单侧全膝关节置换,双膝组（30例,60膝）行双膝同期全膝关节置换。结果与结论：2组患者在感染、肺栓塞、死亡率等并发症发生率方面差异无显著性意义（P〉0.05）,而双膝组患者心血管并发症的发生率、置换后失血量及输血量均高于单膝组（P〈0.05）。置换后1年随访时,2组患者的膝关节活动度、股四头肌肌力、美国特种外科医院膝关节评分比较差异无显著性意义（P〉0.05）。但双膝组患者目测类比评分显著低于单膝组（P 〈0.05）,提示双侧同期全膝关节置换患者心血管并发症方面的风险略高,对存在心血管系统疾病合并症的患者,应尽量避免行双侧同期全膝关节置换。     

等速向心肌力训练对膝关节骨性关节炎患者关节功能水平的影响

目的:研究腿部肌群等速向心肌力训练对提高膝关节骨性关节炎患者关节功能水平的作用。方法:将膝关节骨性关节炎患者100例(168膝)随机分为两组,对照组50例(85膝),进行推髌骨、股四头肌训练及楔形垫行走训练等常规康复治疗;等速组50例(83膝),在常规康复治疗的基础上进行患腿肌群等速运动训练。所有患者均在治疗前和治疗后8周时接受等速肌力测试及采用Lysholm膝关节功能评分作为康复疗效判定标准。结果:经过8周的系统康复治疗,等速组与对照组患者的屈、伸肌峰力矩(PT)、总功量(TW)、平均功率(AP)和伸屈肌单次最大作功量(MRTW)均较前有改善,等速组改善较对照组更明显(P<0.01)。两组的患者的Lysholm评分均较前有改善,等速组Lysholm评分较对照组进步明显(P<0.01)。结论:等速向心肌力训练明显提高膝关节骨性关节炎膝部肌群力量,改善关节功能。     

Viscosupplementation effect on proprioception in the osteoarthritic knee

OBJECTIVE: To test the hypothesis that treatment of the osteoarthritic knee with intraarticular hyaluronan may improve proprioception. METHODS: Forty-six patients with unilateral osteoarthritis of the knee were recruited for this study from primary care clinics in the Department of Family Medicine at the University of Western Ontario. Inclusion required (1) the presence of pain with activities of daily function and (2) radiographic confirmation of medial compartment osteoarthritis. Proprioception was measured with an electrogoniometer attached to the study knee. Subjects performed an angle reproduction test in the closed kinetic position. The difference between the target test angle and the reproduced angle was labeled the absolute angular error (AAE). Eleven angles were tested in random order before beginning therapy, after 3 weeks, and after 12 weeks. RESULTS: Twenty-one men and 19 women completed the study (22 subjects received hyaluronan injections and 18 subjects received a placebo injection). No significant differences existed between the study groups in age, the timing of injections, or proprioceptive testing. A 2 x 3 repeated measures analysis of variance (ANOVA) comparing injection groups at all times revealed no significant differences in AAE. The AAE proprioception data was examined for differences due to fatigue caused by the number of test angles (p < .001) and differences explained by angulations in various divisions of the normal range of motion (p < .001). After accounting for these potential confounds, a two-way ANOVA still did not detect any significant differences in AAE between hyaluronan and placebo groups. CONCLUSION: Other studies have found that proprioception may be impaired in osteoarthritic knees and that viscosupplementation therapy with hyaluronan may decrease pain and increase function in these knee joints. The results of the present study suggest that this therapy does not adversely affect proprioception and that a longer, longitudinal study is required to determine if viscosupplementation treatments could attentuate proprioceptive decline.     

Ankle strength impairments associated with knee osteoarthritis

BackgroundKnee Osteoarthritis seems to negatively impact ankle biomechanics. However, the effect of knee osteoarthritis on ankle muscle strength has not been clearly established. This study aimed to evaluate the ankle strength of the plantar flexors and dorsiflexors of patients with knee osteoarthritis in different degrees of severity.MethodsThirty-seven patients with knee osteoarthritis and 15 controls, subjected to clinical and radiographic analysis, were divided into three groups: control, mild, and moderate knee osteoarthritis. Participants answered a self-reported questionnaire and accomplished a muscle torque assessment of the ankle using the Biodex dynamometer in isometric, concentric and eccentric modes.FindingsThe mild osteoarthritis group (peak torque = 26.85(SD 3.58)) was significantly weaker than the control (peak torque = 41.75(SD 4.42)) in concentric plantar flexion (P < 0.05). The control and mild osteoarthritis groups were not significantly different from the moderate osteoarthritis group (peak torque = 36.12(SD 4.61)) in concentric plantar flexion. There were no significant differences for dorsiflexion among the groups; however the control and moderate osteoarthritis groups presented large and medium standardized mean differences. The mild osteoarthritis group was significantly lower than the control and moderate osteoarthritis groups in the concentric plantar flexion by concentric dorsiflexion torque ratio.InterpretationAnkle function exhibited impairments in patients with knee osteoarthritis, especially in the plantar flexion torque, in which the mild osteoarthritis group was weaker than the control. Interestingly, patients with moderate knee osteoarthritis showed results similar to the control group in plantar flexion torque. The results raise the possibility of a compensatory mechanism of the plantar flexors developed by patients in more advanced degrees to balance other muscle failures.     

同期双侧全膝关节置换与选择性单侧全膝关节置换后的早期功能恢复

背景:同期双侧全膝关节置换与选择性单侧全膝关节置换后的早期功能恢复一直存在着争议。目的:评价双膝骨关节炎患者同期双侧全膝关节置换与选择性单侧全膝关节置换后功能恢复情况的差异。方法:根据置换方案将初次行全膝关节置换的双膝骨关节炎患者86例(116膝)分为两组,双膝组(n=29,58膝)行同期双侧全膝关节置换,单膝组(n=57,57膝)行单侧全膝关节置换。分别对两组患者置换前后的关节活动度、屈曲挛缩度、肌力、疼痛评分、双下肢不等长及HSS评分进行比较分析,并记录并发症的发生率。结果与结论:置换后1年随访,两组患者置换后关节活动度和肌力差异无显著性意义(P=0.171,0.418);置换后屈曲挛缩度、疼痛评分及双下肢不等长双膝组均显著低于单膝组(P=0.006,0.0013,0.026);同时双膝组置换后HSS评分优于单膝组(P=0.003)。提示同期双侧全膝关节置换患者在屈曲挛缩度、疼痛症状评分、双下肢不等长及HSS评分方面优于单侧全膝关节置换,而两种方案在置换后关节活动度和下肢肌力方面无明显差异。     

同期双侧全膝关节置换与选择性单侧全膝关节置换后的早期功能恢复

背景：同期双侧全膝关节置换与选择性单侧全膝关节置换后的早期功能恢复一直存在着争议。目的：评价双膝骨关节炎患者同期双侧全膝关节置换与选择性单侧全膝关节置换后功能恢复情况的差异。方法：根据置换方案将初次行全膝关节置换的双膝骨关节炎患者86例（116膝）分为两组,双膝组（n=29,58膝）行同期双侧全膝关节置换,单膝组（n=57,57膝）行单侧全膝关节置换。分别对两组患者置换前后的关节活动度、屈曲挛缩度、肌力、疼痛评分、双下肢不等长及HSS评分进行比较分析,并记录并发症的发生率。结果与结论：置换后1年随访,两组患者置换后关节活动度和肌力差异无显著性意义（P=0.171,0.418）;置换后屈曲挛缩度、疼痛评分及双下肢不等长双膝组均显著低于单膝组（P=0.006,0.0013,0.026）;同时双膝组置换后HSS评分优于单膝组（P=0.003）。提示同期双侧全膝关节置换患者在屈曲挛缩度、疼痛症状评分、双下肢不等长及HSS评分方面优于单侧全膝关节置换,而两种方案在置换后关节活动度和下肢肌力方面无明显差异。     

Effects of osteoarthritis and fatigue on proprioception of the knee joint

OBJECTIVE: To evaluate the impact of knee osteoarthritis (OA) and periarticular muscular fatigue on knee joint kinesthesia. DESIGN: Cross-sectional study. SETTING: A physical medicine and rehabilitation outpatient clinic. PARTICIPANTS: Fifty patients with bilateral OA of the knee, and a control group of 30 age-matched healthy volunteers. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The Kellgren-Lawrence grading system was used to determine the radiographic severity of knee OA. The Lequesne index of severity for knee osteoarthritis was used for assessment of pain, kinesthesia was measured by determining angle reposition error at the knee joint using isokinetic dynamometry, and muscle strength was measured by isokinetic dynamometry. RESULTS: Reposition errors did not differ between the patient and the control groups, nor did they differ between pre- and postexercise. CONCLUSIONS: Mild-to-moderate OA of the knees does not affect reposition error. Fatigue produced by mild-to-moderate exercise also has no effect on reposition error.     

Effects of disease severity on response to lateral wedged shoe insole for medial compartment knee osteoarthritis

OBJECTIVE: To determine the effects of lateral wedged insoles on knee kinetics and kinematics during walking, according to radiographic severity of medial compartment knee osteoarthritis (OA). DESIGN: A prospective case control study of patients with medial compartment OA of the knee. SETTING: Gait analysis laboratory in a university hospital. PARTICIPANTS: Forty-six medial compartment knees with OA of 23 patients with bilateral disease and 38 knees of 19 age-matched healthy subjects as controls. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: We measured the peak external adduction moment at the knee during the stance phase of gait and the first acceleration peak after heel strike at the lateral side of the femoral condyles. Kellgren and Lawrence grading system was used for radiographic assessment of OA severity. RESULTS: The mean value of peak external adduction moment of the knee was higher in OA knees than the control. Application of lateral wedged insoles significantly reduced the peak external adduction moment in Kellgren-Lawrence grades I and II knee OA patients. The first acceleration peak value after heel strike in these patients was relatively high compared with the control. Application of lateral wedged insoles significantly reduced the first acceleration peak in Kellgren-Lawrence grades I and II knee OA patients. CONCLUSIONS: The kinetic and kinematic effects of wearing of lateral wedged insoles were significant in Kellgren-Lawrence grades I and II knee OA. The results support the recommendation of use of lateral wedged insoles for patients with early and mild knee OA.     

Concentric versus combined concentric-eccentric isokinetic training: effects on functional capacity and symptoms in patients with osteoarthrosis of the knee

OBJECTIVE: To compare the effects of concentric and coupled concentric-eccentric isokinetic resistance training on functional capacity and symptoms of patients with osteoarthrosis (OA) of both knees. DESIGN: Repeated measures. SETTING: A university exercise physiology laboratory. PARTICIPANTS: Twenty-three volunteers, ages 41 to 75 years. Patients were randomly assigned to 3 groups: concentric (CON, n = 9), concentric-eccentric (CON-ECC, n = 8), and nontreatment (NONTX, n = 6). INTERVENTIONS: The CON group performed 12 concentric contractions of each knee extensor and flexor muscles; the CON-ECC group performed 6 concentric and 6 eccentric contractions of each knee muscle group by using a spectrum of angular velocities ranging from 30 degrees/s to 180 degrees/s with 30 degrees/s intervals, for both sides, 3 days a week for 8 weeks. MAIN OUTCOME MEASURES: Functional capacity (rising from a chair, walking, stair climbing and descending) and pain during rest and activities, peak torque, and cross-sectional area (CSA) of knee muscle groups of subjects were tested before and after training. RESULTS: Both training groups showed marked decreases (P <.001) in pain scores and increases (P <.001) in functional capacity together with increases (P <.05--.01) in peak torque and CSA of knee muscles. However, the NONTX group did not display these marked changes after the 8-week period. The results also indicated that concentric-eccentric training has a greater influence on functional capacity, especially stair climbing and descending, than that of concentric training when compared with NONTX group; however, the improvements in pain measurements were better in the CON group compared with the CON-ECC group after the training. CONCLUSIONS: The results suggest that with the isokinetic resistance training used in this study, it is possible to improve functional capacity and decrease pain in patients with OA of the knee. The results also showed that extensive training involving a high number of repetitions and eccentric contractions was safe, effective, and well tolerated for the patients with knee OA.     

Use of ultrasound to increase effectiveness of isokinetic exercise for knee osteoarthritis

OBJECTIVE: To investigate the effects of ultrasound (US) in isokinetic muscle strengthening exercises on functional status of patients with knee osteoarthritis (OA). DESIGN: Effectiveness of isokinetic muscle strengthening exercises for treatment of periarticular soft tissue disorders was compared with and without pulsed and continuous US. SETTING: Outpatient exercise program in a Taiwan medical university hospital. PARTICIPANTS: One hundred twenty subjects with bilateral knee OA (Altman grade II). INTERVENTION: Subjects were randomized sequentially into 1 of 4 groups. Group I received isokinetic muscular strengthening exercises, group II received isokinetic exercise and continuous US, group III received isokinetic exercise and pulsed US treatment, and group IV was the control group. MAIN OUTCOME MEASURES: Therapeutic effects of isokinetic exercise were evaluated by changes in ambulation speed and the Lequesne index. In addition, changes in knee range of motion (ROM), visual analog scale for pain, and muscle peak torques during knee flexion and extension were compared. Compliance in each group was recorded. RESULTS: Each treated group had increased muscle peak torques and significantly reduced pain and disability after treatment and at follow-up. However, only patients in groups II and III had significant improvement in ROM and ambulation speed after treatment. Fewer participants in group III discontinued treatment due to knee pain during exercise. Patients in group III also showed the greatest increase in walking speed and decrease in disability after treatment and at follow-up. Gains in muscular strength in 60 degrees /s angular velocity peak torques were also noted in groups II and III. However, group III showed the greatest muscular strength gains with 180 degrees /s angular velocity peak torques after treatment and follow-up. CONCLUSIONS: US treatment could increase the effectiveness of isokinetic exercise for functional improvement of knee OA, and pulsed ultrasound has a greater effect than continuous US.     

The influence of cyclic concentric and eccentric submaximal muscle loading on cell viability in the rabbit knee joint

Background

Cartilage loading is associated with the onset and progression of osteoarthritis and cell death may play an important role in these processes. Although much is known about cell death in joint impact loading, there is no information on joints loaded by muscular contractions. The aim of this study was to evaluate the influence of muscle generated eccentric and concentric submaximal joint loading on chondrocyte viability. We hypothesised that eccentric muscle activation leads to increased cell death rates compared to concentric loading and to controls.

Methods

16 rabbits received either 50 min of uni-lateral, cyclic eccentric (n = 8) or concentric (n = 8) knee loading. Muscle activation for these dynamic conditions was equivalent to an activation level that produced 20% of maximum isometric force. Contralateral joints served as unloaded controls. Cell viability was assessed using confocal microscopy.

Findings

Eccentric contractions produced greater knee loading than concentric contractions. Sub-maximal contractions caused a significant increase in cell death in the loaded knees compared to the unloaded controls, and eccentric loading caused significantly more cell death than concentric loading.

Interpretation

Cyclic sub-maximal muscle loading of the knee caused increased chondrocyte death in rabbits. These findings suggest that low levels of joint loading for prolonged periods, as occurs in endurance exercise or physical labour, may cause chondrocyte death, thereby predisposing joints to degeneration.     

等速离心肌力训练治疗膝关节骨关节炎的研究

运动Ｃｙｂｅｘ－６０００型等还肌力测试和训练系统对２０例膝关节骨关节炎患者进行 量等速离心肌力训练，观察训练对患膝肌力、疼痛及下肢功能的影响。结果表明：经过４周的训练，患膝 伸肌群各项测试指标均有不同程度提高，疼痛明显缓解，下肢功能显著改善。说明亚极量等速离心训练对膝关节骨关节炎２的近期疗效是明显的。     

Functional outcome in knee osteoarthritis after treatment with hylan G-F 20: a prospective study

OBJECTIVE: To assess functional change in patients with knee osteoarthritis (OA) after treatment with intra-articular hyaluronic acid (Hylan G-F 20; Synvisc). DESIGN: Prospective case series with 6-month follow-up. SETTING: Outpatient community orthopedic practice. PARTICIPANTS: Eighty-four consecutive patients referred to private orthopedic group with symptoms and radiographic evidence of unilateral or bilateral knee OA who had either failed or could not tolerate the side effects of conservative treatment. Sixty-one patients completed the study. Nineteen patients were lost to follow-up. Four patients withdrew from study due to subsequent knee arthroplasty. INTERVENTION: Three weekly injections of Hylan G-F 20 into one or both (if bilaterally symptomatic) knees (110 knees total). OUTCOME MEASURE: SF-36 Health Survey was completed before treatment and 6 months after treatment. RESULTS: Statistically significant improvement (p < .001) in Physical Functioning, Role-Physical, Bodily Pain, Social Functioning, and Role-Emotional categories on 6-month follow-up survey. Age and percent above ideal body weight were not significant predictors of functional change. CONCLUSION: Efficacy of intra-articular injection of Hylan G-F 20 for knee OA 6 months after injection is demonstrated in several categories of the SF-36, indicating a measurable improvement in overall functioning in these patients.     

同时双侧全膝表面置换与单侧全膝关节置换围手术期康复的比较

背景:目前对于双膝严重骨性关节炎行两组同时双侧全膝表面置换的围手术期康复的相关研究尚不多见。目的:比较双膝骨性关节炎两组同时双侧全膝表面置换术与单侧全膝关节置换围手术期康复训练的效果。方法:两组医生对59例(118膝)患者双膝骨性关节炎同台同时全膝表面置换,与同期80例单膝骨性关节炎行单侧全膝关节置换患者(对照组)进行疗效比较。两组患者置换前均进行康复教育及预备康复,置换后康复方法标准一致。结果与结论:同时双侧全膝表面置换组置换前通过压腿平均减小屈曲畸形角度11.2°(5°～22°)。置换后3～6周,股四头肌、腘绳肌肌力5级,较置换前平均增加0.8级;平均ROM≥95°(110±15)°;无痛行走500m以上;独自无痛上下10级楼梯,无肿胀;出院时HSS评分较置换前增加。置换后3个月没有发现松动表现及不良反应,其康复疗效与对照组对比差异无显著性意义。表明,在围手术期对双膝骨性关节炎两组医生行同时双侧全膝表面置换,通过系统而量化的康复,有利于减少置换中截骨量和置换后并发症,促进患者膝关节功能恢复,与单侧全膝关节置换相比康复结果无明显差异。     

全膝关节置换治疗氟骨症所致的膝关节损害

背景：地方性氟骨症膝关节损害是一个复杂的慢性全身性疾病,可造成膝关节骨周,骨质的损害。目的：观察人工全膝关节置换治疗地方性氟骨症所致的膝关节损害的临床疗效。方法：纳入2010-03/2011-10依据地方性流行病学、氟斑牙、临床表现及影像学检查确诊由氟骨症所致的膝关节损害患者9例,均行双侧人工全膝关节置换,于置换前及本次随访时根据美国特种外科医院膝关节评分系统进行临床疗效评估。结果与结论：膝关节置换后,美国特种外科医院膝关节评分结果显示优5例,良3例,可1例。患者治疗后在疼痛、功能以及关节活动度等方面均明显改善。说明人工全膝关节置换是治疗地方性氟骨症所致的膝关节损害的有效方法。     

Tibiofemoral joint forces during maximal isokinetic eccentric and concentric efforts of the knee flexors

OBJECTIVE: The examination of muscular and tibiofemoral joint forces during maximal efforts of the knee flexors. DESIGN: The muscular and tibiofemoral joint knee forces during eccentric and concentric isokinetic efforts of the knee flexors were determined using a two-dimensional mathematical model. BACKGROUND: The examination of joint and muscle loading during isokinetic movements is important for the determination of safety of this exercise. METHODS: Ten healthy males performed three maximal isokinetic concentric and eccentric efforts of the knee flexors at angular velocities of 30 degrees s(-1), 90 degrees s(-1), 120 degrees s(-1) and 150 degrees s(-1). The muscular, tibiofemoral shear and compressive joint forces were determined using a two-dimensional model. RESULTS: The maximum muscular force ranged from 3.44 (Standard deviation, 1.32) times body weight to 6.19 (1.78) times body weight. The tibiofemoral compressive force ranged from 2.62 (1.17) times body weight to 5.89 (1.99) times body weight occurring at angles ranging from 0 degrees to 40 degrees of knee flexion. The posterior shear force ranged from 2.61 (1.33) times body weight to 3.89 (1.62) times body weight and was observed at angles ranging from 50 degrees to 80 degrees of knee flexion. Two-way analysis of variance designs indicated significant effects of type of muscle action and angular velocity on muscle and compressive forces (P<0.05). In contrast, the shear force was not affected by the type of muscle action or the angular velocity (P>0.05). CONCLUSIONS: Isokinetic efforts of the knee flexors induce high tibiofemoral joint forces, especially during high-speed eccentric tests.     

Effects of intra-articular hylan G-F 20 injections on clinical and biomechanical characteristics of the knee in osteoarthritis

The objectives of this study were to investigate the effects of Hylan G-F 20 (Synvisc; Genzyme Biosurgery, Ridgefield, New Jersey, USA) injections on clinical and biomechanical gait characteristics of patients with knee osteoarthritis. The design was a before-after trial, set in the gait laboratory of the rehabilitation unit of a university hospital. Twelve patients participated with an average age (+/-SD) of 63.2+/-4.4 years, and Kellgren and Lawrence grade II or III knee osteoarthritis. The main outcome measures were the Western Ontario McMaster Universities Osteoarthritis Index, and time-distance, kinematic and kinetic parameters of gait. The intervention used was a single course of three bilateral intra-articular injections of 2 ml Hylan G-F 20. One week after the treatment, the pain subscore and total score of WOMAC decreased from 9.2+/-2.7 to 4.8+/-3.1 and from 42.1+/-15.2 to 37.9+/-13.5, respectively. There was improvement in sagittal plane excursions of the knee (from 40.2+/-8.1 to 43.3+/-8.5), in extensor and adductor moments (from 0.26+/-0.2 to 0.14+/-0.1 and from 0.45+/-0.1 to 0.41+/-0.1, respectively), and in scaled vertical forces (from 85.8+/-4.5 to 88.4+/-5.4). All these differences were statistically significant.In conclusion, intra-articular Hylan G-F 20 injections not only decrease pain in patients with knee osteoarthritis, but can alter the natural history of the disease by decreasing excessive loads in the knees.     

双膝骨性关节炎患者未行二期膝关节置换的影响因素☆

背景：双膝骨性关节炎患者,做单侧置换后,很大一部分患者未作二次对侧置换,有很多影响因素。目的：双膝骨性关节炎患者一期选择性单侧全膝关节置换后未行二期对侧膝关节置换的影响因素分析。方法：纳入初次一期单侧全膝关节置换的双膝骨性关节炎患者28例28膝,假体均采用施乐辉公司普通型,所有患者一期单侧全膝关节置换后1年内未行二期对侧膝关节置换。记录置换前后HSS评分、膝关节活动范围;同时对28例患者未行二期膝关节置换影响因素进行问卷调查。结果与结论：2例失访,2例在外院行对侧膝关节置换,最终随访24例24膝,平均随访12.6个月（12-19个月）。膝关节活动范围与HSS评分置换后与置换前比较均显著增加,差异有显著性意义（P=0.007,P=0.409）。问卷调查分析影响患者选择二期手术因素,单因素随访结果围手术期疼痛是主因占到95%以上;多因素随访结果：围手术期的疼痛占95.8%,心理因素占87.5%,医院的软件条件占70.8%,3项原因平均占总因素的84.7%。说明24例24膝未行二期膝关节置换影响因素中置换后围手术期的疼痛、患者的心理因素及医院的软件条件占据主导地位。