Mean Knee Society Score Research Articles

Total knee arthroplasty with long tibial stem for tibial stress fractures with knee osteoarthritis: Two birds with one stone

PurposeThe treatment and outcome of tibial stress fractures concomitant with knee osteoarthritis (OA) are complicated. The aim of this study was to evaluate the functional and radiological outcome of total knee arthroplasty with long tibial stem as a treatment for patients having knee OA and tibial stress fracture. MethodsPatients who were diagnosed to have proximal tibia stress fracture along with knee OA at our institution between June 2013 and November 2018 were included in our study. All patients underwent total knee arthroplasty with long tibial stem. Preoperative and postoperative functional assessments were done according to range of movement of the knee joint, knee society score and knee injury and OA outcome score. Descriptive analysis was carried out by mean and standard deviation for quantitative variables, frequency and proportion for categorical variables. ResultsTwelve patients were included in the study. All patients were found to have stress fractures in the proximal half of tibia and extra-arthrosis. Four patients had non-union/delayed union, and 8 patients had acute fractures. The average preoperative range of movement was 88.1°, which improved to 116.3° at 3 months following surgery. It was found that the fracture has healed in all cases. Mean knee society score improved from 32.9 preoperatively to 89.3 at 1 year follow-up. Knee injury and OA outcome score improved from a mean score of 28.3 preoperatively to 81.1 at 1 year follow-up. ConclusionStress fractures can occur in the proximal tibia in patients with knee OA. Total knee arthroplasty with tibial stem provides a suitable solution for both conditions. Additional plating or bone graft is unlikely to be required.

Limb salvage surgery with endoprosthesis reconstruction in management of locally advanced primary bone tumours: a functional outcome evaluation

<p><strong>Background: </strong>Endoprosthetic reconstruction using a custom-made metallic mega-endoprosthesis is one of the common modalities for limb salvage operation. The new promising advance of material science, design and fabrication of the endoprosthesis enable an immediate rehabilitation program and provide a durable and functional limb. The aim of the study was to evaluate the efficacy and functional outcome in patients with primary bone tumours treated by limb salvage surgery using endoprosthetic replacement.</p><p><strong>Methods:</strong> A total of 14 patients with primary bone tumour in major large joints of the body, selected between January 2019 to August 2020, were managed by limb salvage surgery via endoprosthetic replacement. This was a prospective study conducted at a Tertiary care Government Hospital in Kolkata, and all patients were followed up to a minimum of 1.5 years. The evaluation system used was proposed by Enneking, recommended by the musculoskeletal tumour society in addition to the radiologic evaluation.</p><p><strong>Results: </strong>At final follow-up, the mean musculoskeletal tumour society score was 89.71±3.58. The mean Knee Society Score of 9 patients was 85.55±3.64 and mean Harris hip score of 2 patients and Oxford shoulder score of 4 patients were 90.5 and 41.67 respectively by the end of 1.5 years. 12 (85.7%) patients did not have any complications. None of the cases had implant loosening or breakage, periprosthetic fracture, tumour recurrence or amputation.</p><p><strong>Conclusions: </strong>Endoprosthesis are excellent choices for the treatment of bone tumours with limb preservation in relation to pain, strength, and patient’s emotional acceptance as they reconstruct a limb with an acceptable oncologic, functional, and cosmetic result providing immediate weight-bearing capacity and generating a greater independence.</p>

Functional Outcome Based on Mechanical Axis Alignment Following Total Knee Arthroplasty.

BackgroundTotal knee arthroplasty (TKA) is the most commonly performed and highly successful surgical intervention for end-stage osteoarthritis of the knee, and it offers patients pain relief, functional recovery, and improved quality of life. The success of knee arthroplasty depends on various factors such as precise surgical technique, alignment of the limb and components, patient selection, and compliance with rehabilitation. Mechanical alignment of the lower limb has been considered an important factor in planning and assessing the success of TKA. Optimal alignment remains a matter of controversy; hence, it is paramount to assess the alignment and functional outcomes.Aim and objectiveThis study aimed to evaluate the reliability of conventional instrumentation in imparting the intended femoral and tibial coronal alignment, as well as study the functional outcome among the neutrally aligned outliers with respect to the mechanical axis of the lower limb using standing long-leg radiographs.MethodologyThis is a prospective, hospital-based, observational study that was conducted on 60 knees in 42 patients with primary osteoarthritis of the knee joint in the department of orthopedics, Satguru Partap Singh (SPS) Hospitals, Ludhiana. Patients undergoing total knee arthroplasty who fulfilled the inclusion criteria were included in our study and evaluated using Knee Society Score and knee flexion range at periodic follow-up till six months. Preoperative and postoperative standing long-leg radiographs were done for all the patients, and their functional outcome was compared among inliers and outliers.ResultsOut of these 60 total knee arthroplasties, 18 patients were operated on both knees, and 24 patients were operated on a single knee. There were 25 female patients and 17 male patients. The mean for pre-operative mechanical axis alignment angle was 11.88° ± 5.63° with a range from -3° to 27°, which changed to 2.90° ± 1.59° with a range from 0° to 8° at six months follow-up. It was observed that 42 of the knees were in the inliers, and the remaining 18 knees were in the outliers group. On comparison among inliers and outliers, we found that the mean range of motion was 108.29° ± 4.82° for the inliers group and 106.11° ± 4.04° for the outliers group (p = 0.091), depicting non-significant statistical comparison. Mean Knee Society Score values in inliers and outliers group were 152.45 ± 5.33 and 151.61 ± 3.55, respectively (p = 0.740), showing no statistical significance.ConclusionAt six months follow-up, there is no difference in the knee range of motion and Knee Society Scores between mechanical axis inliers and outliers. Thus, we conclude that although every knee arthroplasty is intended to have neutral mechanical alignment, there is no effect of mild mechanical axis malalignment on functional outcome following total knee arthroplasty in the short term.

Medial parapatellar soft tissue overlapping suture in total knee arthroplasty for severe osteoarthritis with permanent patellar dislocation: early and mid-term results

To evaluate the early and mid-term clinical results of medial parapatellar soft tissue overlapping suture in total knee arthroplasty for treatment of severe osteoarthritis combined with permanent patellar dislocation. We retrospectively analyzed the data of 12 patients (12 knees) diagnosed with severe knee osteoarthritis combined with permanent patellar dislocation undergoing total knee arthroplasty with medial parapatellar soft tissue overlapping suture. Knee Society Score (KSS), University of California Los Angeles (UCLA) activity-level rating, Visual Analog Scale (VAS) pain score, and knee range of motion of the patients were assessed before and 2 years after the surgery. Anteroposterior and lateral radiographs of the knee joint, full-length standing radiographs of the lower limbs and patellar axial radiographs were evaluated. The mean Knee Society Score of the patients increased from 34.2±11.1 before surgery to 73.5±6.3 at two years after the surgery (P < 0.001). The UCLA activity-level rating increased from an average of 3.8 ± 0.8 before surgery to 5.8 ± 0.6 at two years postoperatively (P=0.003). The mean VAS pain score decreased from 42.8±6.0 before surgery to 20.1±3.7 (P < 0.001) and the range of motion of the knee joint increased from 74.6±8.9 degrees to 97.5±4.5 degrees at two years (P < 0.001). The radiographs showed no signs of subluxation or dislocation of the patella in all the patients. Medial parapatellar soft tissue overlapping suture in total knee arthroplasty can achieve good early and mid-term clinical results for treatment of severe osteoarthritis combined with permanent patellar dislocation.

Low body mass index is a risk factor for increased post-operative mortality and poor functional improvement in distal femur fractures among patients aged over 65: A multicentre (TRON) study

BackgroundDistal femur fractures have been reported to have a mortality rate comparable to hip fractures, but the risk is still unknown. Recent studies have reported that low body mass index (BMI) is a risk factor for mortality in the elderly. We investigated the efficacy of low BMI for predicting the risk of mortality in distal femur fractures in patients aged over 65 within 18 months after injury and its impact on postoperative clinical outcomes and mortality. MethodsData from patients followed for more than six months were obtained from our trauma research group's database. We investigated risk factors for increased mortality using Cox proportional hazards models. We divided the analysed cases into low (<18.5 kg/m2) and high (>18.5 kg/m2) BMI groups. We adjusted the background characteristics of the groups by patient matching, and evaluated the postoperative mortality, complication rate, and knee society score (KSS). ResultsWe identified 216 patients, including 58 (26.9%) with low BMI values. Low BMI was an independent risk factor for mortality in all models (Hazard Ratio: 2.9, p = 0.011). The overall survival rate of the low BMI group at 18 months was significantly lower than that of the high BMI group (70.7% vs. 89.1%; p = 0.003). The complication rates of the low BMI and high BMI groups were not significantly different (33.3% vs. 22.2%; p = 0.283). The mean KSS values at 3, 6, and 12 months in the low BMI group was significantly worse than that in the high BMI group (78.7 ± 16.2 vs. 84.8 ± 13.1; p = 0.035, 82.2 ± 16.9 vs. 89.7 ± 8.9; p = 0.005, 86.4 ± 13.0 vs. 91.4 ± 8.4; p = 0.020, respectively). ConclusionsOur study indicated that low BMI was independent associated with increased mortality and impaired postoperative functional recovery in distal femur fractures of the elderly patients.

External fixation in the treatment of displaced supracondylar femoral fracture in children: A retrospective case series.

The aim of this study was to evaluate the clinical and radiological outcomes and complications of external fixation use in the treatment of children with displaced supracondylar femoral fractures.. In this retrospective study, 14 children (6 boys, 8 girls; mean age = 7.3 years; age range = 3.9 - 10.3 years) who underwent external fixation for the treatment of a displaced supracondylar femoral fracture from 2010 to 2017 were included. Their medical records were reviewed for general information and surgery details. Postoperative information, such as time to radiographic union, time to regain walking ability, Knee Society Scores (KSS) postoperative score, and KSS functional score were collected. Radiographic images were examined for the measurement of leg length discrepancy and valgus deformity. The mean follow up was 34 (range = 24-50) months. The mean time to radiographic union was 12.3 (range = 10-16) weeks, and the mean time to regain walking ability was 11.8 (range = 11-13) weeks. Leg length discrepancies were all less than 0.8 cm, and valgus deformity was all limited in 10°. The mean KSS postoperative score was 97.5 (range = 93-100), and the mean KSS functional score was 97.1 (range = 90-100). None of the patients exhibited functional deficiency. Neither deep infection nor refracture was detected postoperatively. External fixation seems to be an acceptable alternative modality for treatingdisplaced supracondylar femoral fractures in children, with favorable clinical and radiological outcomes as well as a low complication rate. Level IV, Therapeutic Study.

Modified Medial Collateral Ligament Indentation Technique in Total Knee Arthroplasty with Severe Type II Valgus Deformity.

ObjectiveTo explore the feasibility and clinical efficacy of a modified medial collateral ligament indentation technique in total knee arthroplasty (TKA) with severe type II valgus deformity.MethodsConsecutive patients with Krackow type II valgus deformity >20° who underwent a primary unilateral TKA between May 2008 and June 2017 were studied retrospectively. A medial collateral ligament indentation technique was performed in 20 patients (MCLI group), and 23 patients received the routine lateral structures release technique (LSR group). Radiological parameters, such as the valgus angle (VA), and functional outcomes including the use of constraint implants, Knee Society Score (KSS), Knee Society Function score (KSF), and thickness of the polyethylene insert were compared between the two groups.ResultsA total of 43 consecutive patients had a minimum 2‐year follow‐up. The preoperative VA was comparable between the MCLI (23.5° ± 5.8°) and LSR groups (21.3° ± 3.2°, P = 0.134), as was the postoperative VA (1.1° ± 2.1° and 2.5° ± 3.0°, respectively, P = 0.084). The mean KSS and KSF scores in the MCLI group were 30.2 ± 4.8 and 38.8 ± 4.8, respectively, before surgery, and they increased to 91.3 ± 2.6 and 86.5 ± 2.4 at the last follow‐up. The scores in the LSR group were 31.5 ± 7.5 and 36.5 ± 7.8 before surgery and 92.4 ± 3.5 and 88.5 ± 3.6 at the last follow‐up. While no statistically significant differences in pre‐ or postoperative functional scores were found between the two groups, the MCLI group had thinner polyethylene inserts (9.5 ± 1.1 mm vs 12.9 ± 1.5 mm) and less use of constrained condylar inserts (15% vs 69.6%). During follow‐up, the MCLI group had fewer complications.ConclusionA modified MCLI technique can achieve good outcomes in TKA with type II valgus deformity of >20°. It can maintain a normal joint line level, reduce the use of constrained condylar knee prostheses, and is a reliable choice for severe genu valgum.

Posteromedial plate application using medial midline incision for complex tibia plateau fractures: a retrospective study

BackgroundApplication of a posterior plate for tibia plateau fractures associated with posterior column involvement is becoming a widespread standard practice as previous studies have shown that additional fixation of the posterior column with a posteromedial buttress plate creates strongest fixation in terms of fracture stabilization This study evaluated the clinical and radiological results of patients undergoing surgery for complex tibial plateau fractures involving the posterior column with a posteromedial plate applied via a medial midline incision.MethodsMedical records of patients undergoing surgery for Schatzker type IV, V, and VI tibia plateau fractures involving the posterior column in our institution were reviewed retrospectively. Patients with a follow-up of less than 1 year, pathological fractures, posterolateral column fractures requiring separate fixation, and open fractures were excluded from the study. Three-dimensional computed tomography (3D CT) was performed in all patients before surgery. The study population consisted of 25 patients (21 males and 4 females) with a mean age of 41.5 (19–66) years. The etiologies of the fractures were traffic accidents in seven cases, pedestrian falls in five cases, falls from a height in seven cases, and motor vehicle accidents in six cases.ResultsThe mean follow-up period was 15.9 months (12–25), mean time to union was 14.32 (9–20) weeks, mean Knee Society score (KSS) was 88 (81–95), and range of movement (ROM) was 123° (95°–140°). Loss of reduction was detected in only one patient (4%). A superficial incisional infection occurred in an anterolateral incision in only one patient (4%), and it recovered after oral antibiotic therapy. None of the patients required early implant removal and none had vascular or nerve complications in the postoperative period. Postoperatively, 23 (92%) patients had anatomical reduction and 2 (8%) had acceptable reduction in the sagittal plane CT sections. Acceptable reduction was achieved in 6(24%) patients and anatomical reduction was achieved in 19 (76%) in the coronal plane CT sections (Table 2).ConclusionsClinical results of posteromedial plate application using a single medial midline incision is promising as complication rates were very low and knee scores were high.

How does intraoperative fracture malalignment affect postoperative function and bone healing following distal femoral fracture? : a retrospective multicentre study.

AimsPostoperative malalignment of the femur is one of the main complications in distal femur fractures. Few papers have investigated the impact of intraoperative malalignment on postoperative function and bone healing outcomes. The aim of this study was to investigate how intraoperative fracture malalignment affects postoperative bone healing and functional outcomes.MethodsIn total, 140 patients were retrospectively identified from data obtained from a database of hospitals participating in a trauma research group. We divided them into two groups according to coronal plane malalignment of more than 5°: 108 had satisfactory fracture alignment (< 5°, group S), and 32 had unsatisfactory alignment (> 5°, group U). Patient characteristics and injury-related factors were recorded. We compared the rates of nonunion, implant failure, and reoperation as healing outcomes and Knee Society Score (KSS) at three, six, and 12 months as functional outcomes. We also performed a sub-analysis to assess the effect of fracture malalignment by plates and nails on postoperative outcomes.ResultsThe rates of nonunion and reoperation in group U were worse than those in group S (25.0% vs 14.3%; 15.6% vs 5.6%), but the differences were not significant (p = 0.180 and p = 0.126, respectively). Mean KSS in group U at all follow-up periods was significantly worse that in group S (75.7 (SD 18.8) vs 86.0 (SD 8.7); p < 0.001; 78.9 (SD 17.2) vs 89.1 (SD 9.8); p < 0.001; 85.0 (SD 11.9) vs 91.1 (SD 7.2); p = 0.002, respectively). In the sub-analysis of plates, mean KSS was significantly worse in group U at three and six months. In the sub-analysis of nails, the rate of reoperation was significantly higher in group U (28.6% vs 5.8%; p = 0.025), and mean KSS at six and 12 months was significantly worse in Group U.ConclusionTo obtain good postoperative functional results, intraoperative alignment of the coronal plane should be accurately restored to less than 5°.Cite this article: Bone Jt Open 2022;3(2):165–172.

Locking Plate Alone or in Combination with Cannulated Screws for Hoffa Fractures: A Retrospective Study.

ObjectiveTo determine the efficacy of distal femur condyle locking plate (DFCLP) alone or in combination with cannulated screws for Hoffa fractures.MethodsIn this study, between May 2014 and February 2019, 13 patients between 26 and 64 years with isolated Hoffa fractures were enrolled during the study period and retrospectively analyzed. All patients underwent open reduction and internal fixation by DFCLP alone or in combination with cannulated screws followed by early active rehabilitation postoperatively. The primary outcome was evaluated using range of movement (ROM), Knee Society Score (KSS), International Knee Documentation Committee (IKDC) scoring system, and the fracture healing time of the patients during the 24‐month follow‐up period. Postoperative complications were also used to assess the patients’ conditions.ResultsA total of 13 patients completed the 24‐month follow‐up assessment and achieved bone re‐union at Hoffa fracture sites. The average follow‐up period was 24.5 months (ranging from 24 to 28 months). Six patients were treated by DFCLP in combination with cannulated screws and the remaining seven patients were treated by DFCLP alone. The mean ROM was determined as 119° (ranging from 100° to 130°). The mean KSS score was 87.9 (ranging from 80 to 92 points), with 11 patients evaluated as excellent, two as good, and zero bad cases. The mean IKDC score was 84.2 (ranging from 74.7 to 89.7 points), with 10 evaluated as excellent, three as good, and zero bad cases. The mean IKDC score was 83.3 for patients with medial Hoffa fractures and 84.4 for those with lateral Hoffa fractures. The average time to healing was 3.5 months (ranging from 3 to 4 months), and at month 3, the fracture healing was evident in seven patients (54%), and at month 4, fracture healing was seen in six patients (46%). It is worth mentioning that two patients suffered from knee joint stiffness and osteoarthritis during the 24 months follow‐up. Eleven patients (84.6%) achieved satisfactory knee joint function through early postoperative rehabilitation.ConclusionIn patients with Hoffa fractures, treatment with DFCLP alone or in combination with cannulated screws followed by early active rehabilitation resulted in great stability and satisfactory functional outcomes after 24 months. Our findings may provide surgeons with a new way to treat Hoffa fractures.

Distal Femur Replacement Versus Open Reduction and Internal Fixation for Treatment of Periprosthetic Distal Femur Fractures: A Systematic Review and Meta-Analysis.

To compare complications and functional outcomes of treatment with primary distal femoral replacement (DFR) versus open reduction and internal fixation (ORIF). PubMed, Embase, and Cochrane databases were searched for English language studies up to May 19, 2020, identifying 913 studies. Studies that assessed complications of periprosthetic distal femur fractures with primary DFR or ORIF were included. Studies with sample size ≤5, mean age <55, nontraumatic indications for DFR, ORIF with nonlocking plates, native distal femoral fractures, or revision surgeries were excluded. Selection adhered to the PRISMA criteria. Study quality was assessed using previously reported criteria. There were 40 Level IV studies, 17 Level III studies, and 1 Level II study. Fifty-eight studies with 1484 patients were included in the meta-analysis. Complications assessed {incidence rate ratio [IRR] [95% confidence interval (CI)]: 0.78 [0.59-1.03]} and reoperation or revision [IRR (95% CI): 0.71 (0.49-1.04)] were similar between the DFR and ORIF cohorts. The mean knee range of motion was greater in the ORIF cohort (DFR: 90.47 vs. ORIF: 100.36, P < 0.05). The mean Knee Society Score (KSS) (DFR: 79.41 vs. ORIF: 82.07, P = 0.35) and return to preoperative ambulatory status were similar [IRR (95% CI): 0.82 (0.48-1.41)]. In comparing complications among patients treated for periprosthetic distal femur fracture with DFR or ORIF, there was no difference between the groups. There were also no differences in functional outcomes, although knee range of motion was greater in the ORIF group. This systematic review and meta-analysis highlights the need for future prospective trials evaluating the outcomes of these divergent treatment strategies. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Effectiveness of Proximal Fibular Osteotomy as an Alternative Treatment Modality for Pain Relief and Functional Improvement in Medial Compartment Knee Osteoarthritis

Introduction: Medial compartment knee Osteoarthritis (OA) is a painful and debilitating disease that hinders an individual’s day-to-day activities physically and psychologically. Therefore, amelioration of pain is of utmost importance, which can be achieved by decompressing the medial compartment by Proximal Fibular Osteotomy (PFO). PFO is a simple, novel surgical technique that leads to significant pain relief and functional improvement in patients with knee OA. Aim: To assess the effectiveness of PFO in patients with primary medial compartment OA of the knee joint in terms of pain relief and functional outcome. Materials and Methods: A prospective and interventional study was carried out in the Department of Orthopaedics at Indira Gandhi Government Medical College, Nagpur, Maharashtra, India, during the period from November 2017 to October 2020. A total of 58 patients with moderate to severe symptoms of medial compartment knee OA underwent PFO. Visual Analogue Score (VAS score), Knee Society Score (KSS), and Femoro-Tibial Angle (FTA) were assessed preoperatively, postoperatively, and during follow-up visits at 1, 3, 6, and 12 months. These parameters (VAS score and KSS) were also compared with groups based on Body Mass Index (BMI) and Kellgren-Lawrence (K-L) grading. Paired-t test was used. A p-value of &lt;0.001 was considered statistically significant. Results: Remarkable pain relief was observed by the significant decline in mean VAS score from 8.04±0.68 to 2.65±1.14 at the final follow-up. Mean KSS at final follow-up was 69.82±3.03, which was significantly higher than the preoperative score of 43.38±2.39 (p-value &lt;0.001). A change in mechanical alignment was seen with a decrease in mean FTA from 183.38±1.29° to 179.84±1.83° (p-value &lt;0.001) at the final follow-up. Also, it was observed that results were much more encouraging and consistent in patients with BMI ≤24.99 and K-L grades 1 and 2. Conclusion: PFO is a simple, safe, reasonable, and effective surgical modality of treatment in patients with primary medial compartment knee OA that provides good pain relief and functional improvement. PFO can be an alternative treatment modality for pain relief in patients with medial compartment knee OA.

Knee joint stability following fixation of tibial plateau fracture by angular locking plate fixation

&lt;p class="abstract"&gt;&lt;strong&gt;Background:&lt;/strong&gt; Injuries to the tibial plateau generally occur because of a force directed either medially or laterally an axial compressive force or both an axial force and force from the side. Tibial plateau fractures resulting frequently in functional impairment.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Methods: &lt;/strong&gt;The total of cases included in the study was 47 in number. More than 20 years old patients of both sexes with tibial plateau fractures attended in the study. Proper informed consent was taken from the patients under the study and purpose of the study was explained. Ethical approval was obtained from the Institutional Ethics Committee. All data were processed, analyzed, and disseminated by MS Office and Statistical package for social sciences (SPSS) version 26 as per need.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Results: &lt;/strong&gt;In this study, for majority (51%) patients &amp;lt;12 weeks were in needed for union. Besides these, for 23.40% and 21.28% patients, time for union were 12-14 and &amp;gt;14 weeks respectively. Unfortunately, in 4.26%% cases (n=2) incidence of non-union was occur. The mean period of radiological union was 12.75 weeks (12-16 weeks). Most of the patients were allowed complete weight bearing at 11 to 14 weeks. Average time gap for complete weight bearing was 13.5 weeks. In assessing the knee stability of the participants, we observed, the mean (±SD) angle of knee joints was 112.08 ±12.32 degree. The mean (±SD) Knee Society Score (KSS) was found 77.51 ± 8.16. As per the functional outcomes among all the participants, majority of them (57.45%) got ‘good’ results whereas 29.79% got ‘Excellent’ and 8.51% got ‘Poor’ results.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Conclusions:&lt;/strong&gt; Satisfactory knee joint stability for patients with tibial plateau fracture angular locking plate fixation technic may be considered as an effective treatment method for orthopedic surgeons. &lt;/p&gt;

A Comparison Between Unstemmed and Stemmed Constrained Condylar Knee Prostheses in Primary Total Knee Arthroplasty: A Propensity Score-Matched Analysis.

ObjectiveTo compare and analyze the clinical outcomes between unstemmed and stemmed constrained condylar knees (CCK) in complex primary total knee arthroplasty (TKA) in terms of implant survivorship, change in outcome evaluations, and complications.MethodsWe reviewed 156 consecutive patients who received primary TKA using PFC®SIGMA®TC3 (TC3) of constrained condylar design between January 2009 and January 2017 at our institution. After removing patients who met exclusion criteria, 25 patients were identified as unstemmed TC3 cases and 81 as stemmed TC3 cases. Propensity score matching was used to select 25 stemmed cases as a control group for the unstemmed group with comparable preoperative conditions including preoperative demographics, preoperative diagnosis, preoperative range of motion, main reason to use TC3, ASA score (American Society of Anesthesiologists), and follow‐up duration. Preoperative and postoperative clinical evaluations including Knee Society Score (KSS), Hospital for Special Surgery (HSS) score, the 12‐Item Short‐Form Health Survey (SF‐12), and the range of motion (ROM) were obtained and compared. The instability, periprosthetic fracture, radiolucent lines, polyethylene wear, and heterotrophic ossification were assessed according to the anteroposterior and lateral radiographs of the knee. The complications and implant survivorship between the two groups were also recorded and compared.Results3After the index surgery, both groups showed substantial improvement in KSS (knee and function), HSS score, SF‐12, and ROM compared with baseline. There was no significant difference in the mean KSS scores (knee and function), HSS score, SF‐12, and ROM between the unstemmed and stemmed group postoperatively. No statistically significant difference was found in the overall complication rate between the two groups. The overall Kaplan–Meier survivorship was 98.0% (95% confidence interval 94.1%–100.0%) at 7 years. No significant difference was found in the survival rate between the unstemmed group (100.0%) and the stemmed group (96.0%) at 7 years (log rank, P = 0.317). The mean duration of follow‐up was 7.0 years for unstemmed group and 7.7 years for stemmed group.ConclusionsIn patients with adequate bone stock receiving complex primary TKA, unstemmed CCK could achieve similar clinical outcomes at mid‐term follow‐up as stemmed CCK.

Short-term results of a novel management of supracondylar fracture with coexisting osteoarthritis with bifold fixation and total knee arthroplasty

PurposePresence of supracondylar and periarticular femoral fracture with associated arthritis of knee poses a challenging situation to the orthopaedic surgeon. The results of fixation of fracture in osteoporosis are not very satisfactory and have complications. With fixation alone, they still cannot bear weight on affected leg due to severe disability of osteoarthritis. To make patient walk, conventionally three surgeries in the form of fracture fixation, removal of implant and total knee arthroplasty (TKA) needs to be done in staged manner. We propose a novel management in form of bifold fixation and simultaneous TKA.MethodsEight cases (6 females, 2 males) of supracondylar femoral fractures with severe osteoarthritis of the knee and osteoporosis were primarily fixed with bifold fixation using SIGN nail (www.signfracturecare.org) and locking plate together with simultaneous total knee arthroplasty. There were five cases (2 males and 3 females) of grade 4 (Kellgren-Lawrence grading) osteoarthritis (OA) and three cases (all females) of severe rheumatoid arthritis (RA).ResultsThe mean age was 68 years and average time for full weight bearing was 6 days. Radiographic evidence of fracture union was achieved in 16.25 weeks. The mean Knee Society Score (KSS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score at 26 months was 83.13 and 22.13 respectively.ConclusionsSingle stage combined bifold osteosynthesis with interlocking nail and locking plate together with total knee arthroplasty helps in one time management of these difficult injuries. It is a cost-effective and economically sound option and gives excellent results with good patient satisfaction.

Outcomes of Primary Total Knee Arthroplasty in Fractures Around the Knee in the Elderly: A Systematic Review and Pooled Analysis of 212 Patients Across 11 Studies.

Treatment of fractures around the knee in the elderly is somewhat controversial with primary total knee arthroplasty (TKA) gaining prominence over the past decade or so, as an alternative for open reduction and internal fixation. The present review was conceptualized to review the published literature and evaluate outcomes of TKA in these patients, and to understand whether this is a viable treatment option for these fractures. We have further tried to identify complications and the challenges faced while performing this surgery. PRISMA guidelines were followed and search was conducted on three databases-PubMed, EMBASE and SCOPUS. Studies evaluating multiple factors related to outcomes and complications in primary TKA performed for fractures around the knee in the elderly were included. Cadaveric studies, conference abstracts, case reports, and any studies that included non-traumatic cases or revision after failed internal fixation, were all excluded. Eleven studies, published between 2011 and 2021 were included in our review. There was significant female preponderance in the study population (M:F = 1:3). Implants with higher constraint (high post, hinged prosthesis) were frequently required to compensate for ligamentous laxity due to the fractures. On pooled analysis the mean Knee Society Score (KSS) knee score was 84.62 (excellent), and mean knee range of motion was 107.25°. However, the mean KSS function score was 56.71 (poor), which could have been due to co-morbid conditions and pre-operative status. Overall complication rate was 14.6%; surgical site infection was the most commonly reported. There remains limited evidence for the use of TKA as a primary treatment option for these injuries. In the presence of specific conditions, and in expert hands-it may be a viable alternative to osteosynthesis with comparable outcomes. More focused studies are needed to compare the two treatment options and to formulate guidelines.

Predictors of failure of two-stage revision in periprosthetic knee infection: a retrospective cohort study with a minimum two-year follow-up.

Despite the standardization of two-stage knee revision protocols, a high percentage of failures still occurs. Identifying the predictors of failure is necessary to determine appropriate management and counsel for patients with a periprosthetic knee infection. This study aimed to identify risk factors predicting the failure, to describe implant survival, and to report the mid-term clinical outcomes of patients undergoing two-stage revision for periprosthetic knee infection. Data of patients who underwent two-stage knee revision from 2012 to 2016 were analyzed, and 108 patients were included. The mean age was 66.6 ± 9.2years. The mean follow-up was 52.9 ± 15.6months. Logistic regression was conducted to identify predictors of treatment failure. Kaplan-Meier curves were generated to assess implant survival. Preoperative functional outcomes were compared to those registered at the final follow-up. Difficult-to-treat infections (OR = 4.2, 95% CI 1.2-14.5, p = 0.025), the number of previous surgeries (OR = 1.8, 95% CI 1.2-2.6, p = 0.005), and the level of tibial bone defect (OR = 2.3, 95% CI 1.1-4.7, p = 0.027) significantly predicted the failure of two-stage knee revision. Survivorship of implants was significantly lower for patients presenting these risk factors (p < 0.05). Mean Knee Society Score improved from 49.0 ± 12.0 to 80.2 ± 13.6 (p < 0.001). Mean Oxford Knee Score improved from 22.2 ± 4.9 to 36.1 ± 6.0 points (p < 0.001). Difficult-to-treat pathogens, the number of previous surgeries, and the level of tibial bone defect were independent risk factors of two-stage knee revision failure. Overall, the two-stage protocol provided a good survival rate and functional outcome.

Effect of continuous passive motion on the early recovery outcomes after total knee arthroplasty

IntroductionContinuous passive motion (CPM) is a frequently used method in the early post-operative rehabilitation of patients after knee surgery. In this study, the effectiveness of the CPM method was evaluated after primary total knee arthroplasty during an early recovery period.MethodsEighty patients undergoing total knee arthroplasty were assigned into two groups. The experimental group received CPM and active exercises, while the control group active exercises only. All subjects were evaluated once before the surgery and at a discharge, in terms of mean active range of motion (AROM), mean Knee Society Score (KSS), and Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC).ResultsThe mean AROM for the experimental group was 82.3° ± 14.3° and 76.1° ± 22.2° for the control. The mean KSS score was 136.4 ± 19.3 points for the experimental group, and 135.7 ± 15.1 for the control. There were no statistical differences between the two groups. The KSS functional score was 66.4 ± 8.1 points for the experimental group compared to 62.2 ± 7.3 points for the control, but there was a statistically significant difference between the groups at discharge from the hospital (p = 0.009). A subjective estimation of the pain level, joint stiffness and function also showed a statistically significant difference between the two groups (38.6 ± 14.3 points for the CPM group and 21.2 ± 15.7 for the control).ConclusionThese findings show that there is no significant effect of CPM in terms of improving clinical measurements. However, there was a significant beneficial effect on the subjective assessment of pain level, joint stiffness, and functional ability.

Enhanced recovery after surgery protocols in total knee arthroplasty via midvastus approach: a randomized controlled trial

BackgroundEnhanced recovery after surgery (ERAS) protocols were rapidly adopted in many surgeries such as fast-track arthroplasty. The study aimed to investigate the impact of ERAS protocols on the clinical effect of total knee arthroplasty (TKA) via the midvastus approach.MethodsA total of 69 patients who underwent primary unilateral TKA via the midvastus approach from October 2018 to June 2019 were enrolled and randomly divided into two groups: ERAS group and Control group. The ERAS protocols were adopted for the ERAS group and consisted of pure juice drinking 2 h before the surgery, optimization of the preoperative anesthesia plan, phased use of tourniquets, and the use of tranexamic acid as well as a drug cocktail. The operative time, first postoperative walking time, first straight leg elevation time, postoperative hospitalization time, visual analogue scale score (VAS score), Hospital for Special Surgery score (HSS score), conventional Knee Society score (KSS), and knee range of motion (ROM) were used to assess the clinical effects in the two groups. All the included patients were followed up for 12 months.ResultsThere were no significant differences in the basic demographic information and operation time between the ERAS and Control groups (P > 0.05). The first postoperative walking time (2.11 ± 0.11 h) and first postoperative straight leg elevation time (6.14 ± 1.73 h) in the ERAS group were significantly earlier than those in the Control group (P < 0.001) and the postoperative hospitalization time was significantly shorter (3.11 ± 0.32 days). The postoperative mean VAS scores in both groups were significantly reduced compared with those before surgery (P < 0.001). The VAS scores for the ERAS group were significantly lower than those for the Control group at 1, 2, and 7 days after surgery (P < 0.001). The mean HSS scores, KSS, and knee ROM were significantly increased in both the ERAS and Control groups at 1, 3, 6, and 12 months after surgery (P < 0.001). In addition, the HSS scores, KSS, and knee ROM in the ERAS group were significantly higher than those in the Control group at 1 month after surgery (P < 0.001).ConclusionsERAS protocols improved the clinical effects of TKA via the midvastus approach, facilitating early out-of-bed activity and comfortable postoperative rehabilitation exercise, and further increasing patient satisfaction.Trial registrationClinicalTrials.gov Identifier: NCT04873544.

Outcomes of Combined Unicompartmental Knee Replacement and Anterior Cruciate Ligament Reconstruction: A Systematic Review

Abstract Background The incidence of osteoarthritis of the medial compartment after ACL injury has been quoted to range from 33% to 70%. Medial osteoarthritis in ACL deficient knee is a challenge. Patients are mainly young and active. First reports highlighted a higher incidence of complications, in terms of tibial loosening and higher revision rate, when UKA were performed in ACL-deficient knees. They defined ACL deficiency is a contraindication to UKA. Objectives A systematic review and meta-analysis of literature to assess functional outcomes of combined unicompartmental knee arthroplasty with ACL reconstruction and revision rate. Data Sources The following electronic databases were searched up to 2019: PubMed, Google Scholar search engine, JBJS {Journal of bone and joint Surgery}, Cochrane database of systematic reviews, EMBASE and Science Direct. Results A total of 10 studies met the inclusion criteria encompassing 218 patients who were treated with simultaneous ACL reconstruction and unicompartmental knee arthroplasty. The mean age was 49.5 years (range from 36 to 71) with a mean follow-up of 49.3 months (range from 9 to 258). There was an improvement in mean Oxford Score from 29 to 42.5. The mean knee society score improved from 88.3 to 159. Complications reported included tibial inlay dislocation (n = 3), conversion to a total knee arthroplasty (n = 2), infection requiring two-stage revision (n = 2), stiffness requiring manipulation under anaesthesia (n = 1). Average revision rate was 1.8%. Conclusion Literature has strong evidence to support that combined UKA and ACL reconstruction show good functional outcomes and less revision rate. It is a valid treatment option for MOA more in young age group in whom MOA secondary to ACL tear and intact other knee compartments. there is no clinical trial or study suggest that UKA and ACL reconstruction is superior to UKA with tibial slope change or using fixed bearing prosthesis for MOA in ACL deficient knee with instability.