scholarly journals Outcomes and component-positioning in total knee arthroplasty may be comparable between supervised trained surgeons and their supervisor

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Kazumi Goto ◽  
Yozo Katsuragawa ◽  
Yoshinari Miyamoto
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Operative Time ◽  
Case Series ◽  
Level Of Evidence ◽  
Ankle Angle ◽  
Total Knee ◽  
The Mean ◽  
Hip Knee Ankle Angle

Abstract Purpose There are concerns that malalignment in total knee arthroplasty (TKA) occurs with less experienced surgeons. This study investigates the influence of surgical experience on TKA outcomes. Materials and methods Nineteen patients (38 knees) who underwent bilateral TKA between 2011 and 2015 were included. A supervisor performed knee replacements associated with lower Knee Society Scores (KSS); trainee surgeons operated on the other knee. Knees were categorized into two groups: operations by the supervisor (group S) versus operations by trainee surgeons (group T). Range of motion (ROM), KSS, operative time, hip–knee–ankle angle, and femoral and tibial component angle were evaluated. Results The mean operative time was 92.5 min in group S and 124.2 min in group T (p < 0.01). The mean postoperative maximal flexion was 113.2° in group S and 114.2° in group T (not significant). The mean postoperative KSS was 92.9 in group S and 93.9 in group T (not significant). No significant differences between groups in terms of proportion of inliers for the hip–knee–ankle angle, femoral component angle, or tibial component angle were observed. Conclusions Although operative time was significantly longer for trainee surgeons versus the supervisor, no significant differences in ROM, KSS, or component positioning between supervisor and trainee surgeons were observed. Level of evidence IV (retrospective case series design).

scholarly journals Peri-prosthetic trans-patellar fractures after Total knee Arthroplasty: a case series and review of literature

Arthroplasty ◽  
2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Gaurav Govil ◽  
Lavindra Tomar ◽  
Pawan Dhawan
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Knee Society Score ◽  
Case Series ◽  
Good Choice ◽  
Knee Score ◽  
Level Of Evidence ◽  
Patella Fractures ◽  
Total Knee ◽  
The Mean

Abstract Peri-prosthetic patella fracture is the second most common peri-prosthetic fracture after total knee arthroplasty. This report presented the treatment results in 6 patients with peri-prosthetic patella fractures. From January 2015 to February 2019, six patients with peri-prosthetic patella fractures were treated. The mean age at surgery was 64 years (range, 48–72 years). Four patients with displaced fractures were treated surgically, and two patients with non-displaced fractures were treated non-surgically. Outcomes were assessed in terms of motion, functional knee score, and Knee Society score. The mean follow-up period lasted 16 months (range: 12–20 months). The average arc of motion was 110° (range: 80°–130°). The mean functional knee score was 77 (range: 70–87). The mean Knee Society score was 84 (range: 75–89). The non-surgical treatment may be a good choice for non-displaced peri-prosthetic patella fractures. For displaced fractures, surgical treatments yielded good functional outcomes. Level of evidence IVa

scholarly journals NAVIGATED TOTAL KNEE ARTHROPLASTY FOR OSTEOARTHRITIS WITH EXTRA-ARTICULAR DEFORMITY

2018 ◽  
Vol 26 (3) ◽  
pp. 170-174 ◽  
Author(s):  
IZUMI TANI ◽  
NAOKI NAKANO ◽  
KOJI TAKAYAMA ◽  
KAZUNARI ISHIDA ◽  
RYOSUKE KURODA ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Case Series ◽  
Computer Assisted ◽  
Level Of Evidence ◽  
Assisted Navigation ◽  
Radiographic Outcomes ◽  
Navigation Group ◽  
Significant Difference ◽  
Total Knee

ABSTRACT Objective It is difficult to achieve proper alignment after total knee arthroplasty (TKA) in patients with extra-articular deformity (EAD) because of altered anatomical axis and distorted landmarks. As of this writing, only case series have been reported with regard to the usefulness of computer-assisted navigation systems for TKA with EAD. This study therefore compared outcomes in TKA with EAD, with and without navigation. Methods Fourteen osteoarthritis patients with EAD due to previous fracture malunion or operations were assessed. Seven TKAs were performed with navigation (navigation group) and another 7 were performed without navigation (manual group). Clinical and radiographic outcomes were compared before and two years after surgery. Results The mean postoperative Knee Society function score was significantly higher in the navigation group. No significant difference was found in postoperative range of motion and Knee Society knee score. The rate of outliers in radiographic outcomes tended to be lower in the navigation group. Conclusion Better clinical outcomes were achieved in cases in which navigation was used. Computer-assisted navigation is useful in TKA for patients with EAD. Level of Evidence III; Case control study.

The fate of Baker’s cysts at mid-term follow-up after total knee arthroplasty

2020 ◽  
Vol 102-B (1) ◽  
pp. 132-136
Author(s):  
Hagen Hommel ◽  
Roland Becker ◽  
Peter Fennema ◽  
Sebastian Kopf
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Case Series ◽  
Short Term ◽  
Cyst Size ◽  
Baker’S Cyst ◽  
Baker's Cyst ◽  
Total Knee ◽  
The Mean

Aims We report the natural course of Baker’s cysts following total knee arthroplasty (TKA) at short- and mid-term follow-up. Methods In this prospective case series, 105 TKA patients were included. All patients who received surgery had a diagnosis of primary osteoarthritis and had preoperatively presented with a Baker’s cyst. Sonography and MRI were performed to evaluate the existence and the gross size of the cyst before TKA, and sonography was repeated at a mean follow-up time of 1.0 years (0.8 to 1.3; short-term) and 4.9 years (4.0 to 5.6; mid-term) after TKA. Symptoms potentially attributable to the Baker’s cyst were recorded at each assessment. Results At the one-year follow-up analysis, 102 patients were available. Of those, 91 patients were available for the 4.9-year assessment (with an 86.7% follow-up rate (91/105)). At the short- and mid-term follow-up, a Baker’s cyst was still present in 87 (85.3%) and 30 (33.0%) patients, respectively. Of those patients who retained a Baker’s cyst at the short-term follow-up, 31 patients (35.6%) had popliteal symptoms. Of those patients who continued to have a Baker’s cyst at the mid-term follow-up, 17 patients (56.7%) were still symptomatic. The mean preoperative cyst size was 14.5 cm2 (13.1 to 15.8). At the short- and mid-term follow-up, the mean cyst size was 9.7 cm2 (8.3 to 11.0) and 10.4 cm2 (9.8 to 11.4), respectively. A significant association was found between the size of the cyst at peroperatively and the probability of resolution, with lesions smaller than the median having an 83.7% (36/43) probability of resolution, and larger lesions having a 52.1% (25/48) probability of resolution (p < 0.001). At the mid-term follow-up, no association between cyst size and popliteal symptoms was found. Conclusion At a mean follow-up of 4.9 years (4.0 to 5.6) after TKA, the majority (67.0%, 61/91) of the Baker’s cysts that were present preoperatively had disappeared. The probability of cyst resolution was dependent on the size of the Baker’s cyst at baseline, with an 83.7% (36/43) probability of resolution for smaller cysts and 52.1% (25/48) probability for larger cysts. Cite this article: Bone Joint J. 2020;102-B(1):132–136

scholarly journals Tibial Tubercle Osteotomy in Total Knee Arthroplasty: Midterm Results Experience of a Monocentric Study

Joints ◽  
2018 ◽  
Vol 06 (02) ◽  
pp. 095-099 ◽  
Author(s):  
Stefano Biggi ◽  
Stefano Divano ◽  
Riccardo Tedino ◽  
Andrea Capuzzo ◽  
Stefano Tornago ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Case Series ◽  
Primary Total Knee Arthroplasty ◽  
Implant Design ◽  
Tibial Tubercle ◽  
Tibial Tubercle Osteotomy ◽  
Level Of Evidence ◽  
Total Knee ◽  
Revision Tka

Purpose Difficult primary total knee arthroplasty (TKA) and revision TKA may be high demanding, especially during joint exposure. Aim of this article is to evaluate the clinical and radiological outcomes of a series of patients, who underwent TKA and revision TKA, where tibial tubercle osteotomy (TTO) was performed. Methods We retrospectively reviewed a cohort of 79 consecutives TKAs where TTO was performed. Patients were assessed clinically and radiographically at their last follow-up (mean, 7.4 ± 3.7 years). Clinical evaluation included the Knee Society Score (KSS), the pain visual analogue scale (VAS), and range of motion. Radiological assessment included the evaluation of radiolucent lines, osteolysis, cortical bone hypertrophy, time of bone healing of the TTO fragment, and the hardware complication. Results KSS raised from 40.7 ± 3.1 to 75 ± 4.3 (p < 0.0001). Knee flexion increased from 78.7 ± 9.9° to 95.0 ± 9.5° (p < 0.0001), and VAS improved from 7.9 ± 0.9 to 3.8 ± 1 (p < 0.0001). No signs of loosening or evolutive radiolucency lines were found. Osteolytic areas around the stem were detected. No significant association was found between the implant design and the outcomes, while aseptic loosening showed significantly better results. Complications were: 4 painful hardware, 3 late periprosthetic infections, 1 extension lag of 5°, and 3 flexion lag. Conclusion Our experience suggests the use of TTO to improve the surgical approach in difficult primary TKA or revision TKA. A precise surgical technique leads to good results with low risk of complications. Level of Evidence Level IV, therapeutic case series.

scholarly journals Component gap control during posterior-stabilised total knee arthroplasty using the posterior condylar pre-cut technique

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Makoto Kawasaki ◽  
Ryutaku Kaneyama ◽  
Hitoshi Suzuki ◽  
Teruaki Fujitani ◽  
Manabu Tsukamoto ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Knee Flexion ◽  
Femoral Condyle ◽  
Posterior Part ◽  
Case Series ◽  
Knee Extension ◽  
Level Of Evidence ◽  
Gap Control ◽  
Total Knee

Abstract Purpose Adjusting the gap lengths to ensure equal lengths in both extension and flexion during total knee arthroplasty (TKA) is important for achieving successful outcomes. We designed a new pre-cut trial component (PCT) for posterior-stabilised (PS) TKA and aimed to determine whether the pre-cut technique is useful for component gap (CG) control in PS TKA. Methods A total of 70 knees were included. The PS PCT for PS TKA is composed of a 9-mm-thick distal part and 5-mm-thick posterior part with a cam structure. First, the distal femur and proximal tibia were cut to create an extension gap. Next, a 4-mm pre-cut was made from the posterior femoral condylar line; then, the PS PCT was attached, and the CGs were checked and compared at 0° and 90° knee flexion. Final CGs with the trial femoral components were compared with gaps in PS PCT at 0° and 90° knee flexion. Results CGs using PS PCTs were 10.2 mm at 0° and 13.6 mm at 90° knee flexion. According to the release of the posterior capsule at intercondylar notch and the adjustment of the cutting level of posterior femoral condyle, the final CG on knee extension was 11.3 mm; it did not significantly differ from CGs with PS PCT. The final CG at 90° knee flexion was 12.7 mm; it did not significantly differ from the estimated gap (12.4 mm) in PS PCT after flexion gap control. Conclusion CG control using PS PCT is a useful technique during PS TKA. Level of evidence Level IV: Case series.

scholarly journals Intra-operative peri-articular cocktail injection in inflammatory arthritis patients undergoing total knee arthroplasty

2021 ◽  
Vol 7 (6) ◽  
pp. 1215
Author(s):  
Rohit R. ◽  
U. Thyagarajan ◽  
Raghavendran B. ◽  
Karhik Seetharaman
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Inflammatory Arthritis ◽  
Case Series ◽  
Clinical Score ◽  
Functional Score ◽  
Score Following ◽  
Post Operative Pain ◽  
Total Knee ◽  
The Mean

<p class="abstract"><span lang="EN-US">Pain following TKA is often severe in most patients. The purpose of this case series was to assess the efficiency of intra-operative peri-articular cocktail injection in management of pain following total knee arthroplasty. This case series involves 16 patients with inflammatory arthritis of knee undergoing total knee arthroplasty (TKA). All patients had received peri-articular cocktail of drugs before the implantation of prosthesis with cement. In our study, there was significant improvement of Knee Clinical Score and Knee Functional Score following TKA. The mean KSS score was 37.5 (range: 31-44) improved to 92.5 (range, 86-99) and the functional score improved from 25.5 (range, 18-33) to 76 (range, 72- 80) at 6 months and 93 (range: 90-96) at 12 months. Intraoperative peri-articular injection with 20 ml of 0.5% ropivacaine, 1 ml of ketorolac, 1ml of clonidine and 0.5ml noradrenaline diluted in 20 ml of saline is effective in reducing immediate post-operative pain and thereby improving the overall functional outcome.</span></p>

scholarly journals At what point during total knee arthroplasty operations are gloves most frequently torn?

2020 ◽  
Vol 28 (3) ◽  
pp. 230949902095916
Author(s):  
Ozgun Karakus ◽  
Ahmet Sinan Sarı
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Index Finger ◽  
Case Series ◽  
Ring Finger ◽  
Surgical Glove ◽  
Level Of Evidence ◽  
Sterile Saline ◽  
Glove Perforation ◽  
Total Knee

Purpose: The aim of this study was to determine the time points during a total knee arthroplasty operation when there is the greatest possibility of tearing a surgical glove and thus the stage of the operation at which there is the greatest risk of infection. Methods: The study included 300 total knee arthroplasty cases performed by 10 orthopedic surgeons. Using a chronometer during the operation, the upper layer of each surgical glove was removed and inflated with sterile saline at 10-min intervals. When a tear was determined, a record was made of the time it occurred, the stage of the operation, the finger that was torn, and the side (right or left hand). Results: The mean time of the glove perforation was 40.74 ± 10.69 min. Glove tears occurred at the rate of 28.9% ( n = 39) in the thumb, 63.7% ( n = 86) in the index finger, 2.2% ( n = 3) in the middle finger, and 5.2% ( n = 7) in the ring finger. The tears occurred after the femoral cut in 8.1% ( n = 11), after the tibial cut in 14.8% ( n = 20), at the stage of trial component reduction in 52.6% of cases ( n = 71), after placement of the prosthesis in 7.4% ( n = 10), and at the closure stage in 17% ( n = 23) ( p < 0.001). Conclusion: The fingers requiring the most care during total knee arthroplasty are the thumb and index finger. The stages of the operation with the greatest risk for glove tears are trial component reduction and wound closure. Changing gloves after these high-risk surgical stages would help to decrease the risk of periprosthetic infections. Level of Evidence: Level IV/Case series

scholarly journals Results of total knee arthroplasty for painless, stiff knees

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Young-Joon Choi ◽  
Dong-Kyo Seo ◽  
Ki Won Lee ◽  
Ho Jong Ra ◽  
Hyun Wook Kang ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Total Knee Arthroplasty ◽  
Range Of Motion ◽  
Knee Arthroplasty ◽  
Case Series ◽  
High Rate ◽  
Total Knee ◽  
The Mean

Abstract Background Stiff knees, like completely ankylosed or arthrodesed knees, can be painless. Total knee arthroplasty (TKA) for these painless, stiff knees is technically demanding. However, it can correct the alignment and advance the range of motion to improve quality of life. So, we reviewed the preoperative and postoperative results of functional and pain scores, range of motion (ROM) and complications in painless, stiff knees treated by TKA. Methods Fifteen painless, stiff knees underwent TKA from January 1998 to January 2017. The mean follow-up period was 15.4 (2.4–22.2) years. All the knees were completely ankylosed or arthrodesed. Clinical outcome and complications were evaluated using medical record review, serial plan radiography, ROM assessment, Knee Society score (KSS), Knee Society function score (FS), and a visual analog scale for pain (VAS). Results All patients were satisfied with their operated knees. Mean KSS and FS scores were improved from 36 and 50.9 to 76.9 and 67.2, respectively (P < 0.001 and P = 0.01). The mean ROM increased from 0º preoperatively to 77.6º (15–130) at the final follow-up (P < 0.001). The mean VAS had worsened from 0 preoperatively to 0.2 postoperatively, however it was not significant (P = 0.1). Major postoperative complications were reported in five of the knees (33.3%). Conclusions The results of TKA for painless, stiff knees were satisfactory with improved ROM and quality of life. Although some patients had mild pain and complications postoperatively, they were satisfied with the result. However, our study recommends that surgeons should consider the high rate of complications in the completely ankylosed or arthrodesed knees. Level of evidence A retrospective case series, Level IV.

scholarly journals Demographic data is more predictive of component size than digital radiographic templating in total knee arthroplasty

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Stephen J. Wallace ◽  
Michael P. Murphy ◽  
Corey J. Schiffman ◽  
William J. Hopkinson ◽  
Nicholas M. Brown
Keyword(s):  
Total Knee Arthroplasty ◽  
Regression Model ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Demographic Data ◽  
Patient Specific ◽  
Consecutive Series ◽  
Level Of Evidence ◽  
Component Size ◽  
Total Knee

Abstract Background Preoperative radiographic templating for total knee arthroplasty (TKA) has been shown to be inaccurate. Patient demographic data, such as gender, height, weight, age, and race, may be more predictive of implanted component size in TKA. Materials and methods A multivariate linear regression model was designed to predict implanted femoral and tibial component size using demographic data along a consecutive series of 201 patients undergoing index TKA. Traditional, two-dimensional, radiographic templating was compared to demographic-based regression predictions on a prospective 181 consecutive patients undergoing index TKA in their ability to accurately predict intraoperative implanted sizes. Surgeons were blinded of any predictions. Results Patient gender, height, weight, age, and ethnicity/race were predictive of implanted TKA component size. The regression model more accurately predicted implanted component size compared to radiographically templated sizes for both the femoral (P = 0.04) and tibial (P < 0.01) components. The regression model exactly predicted femoral and tibial component sizes in 43.7 and 43.7% of cases, was within one size 90.1 and 95.6% of the time, and was within two sizes in every case. Radiographic templating exactly predicted 35.4 and 36.5% of cases, was within one size 86.2 and 85.1% of the time, and varied up to four sizes for both the femoral and tibial components. The regression model averaged within 0.66 and 0.61 sizes, versus 0.81 and 0.81 sizes for radiographic templating for femoral and tibial components. Conclusions A demographic-based regression model was created based on patient-specific demographic data to predict femoral and tibial TKA component sizes. In a prospective patient series, the regression model more accurately and precisely predicted implanted component sizes compared to radiographic templating. Level of evidence Prospective cohort, level II.

scholarly journals Tibial bowing and tibial component placement in primary total knee arthroplasty in valgus knees: Are we overlooking?

2019 ◽  
Vol 27 (3) ◽  
pp. 230949901986700
Author(s):  
Dhanasekararaja Palanisami ◽  
Melvin J George ◽  
Arif Mohammed Hussain ◽  
Chunchesh MD ◽  
Rajkumar Natesan ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Weight Bearing ◽  
Valgus Deformity ◽  
Strong Positive Correlation ◽  
Component Placement ◽  
Positive Correlation ◽  
Total Knee ◽  
The Mean

Purpose: Tibial bowing in valgus knees with arthritis can lead to component malplacement during total knee arthroplasty (TKA). Incidence of valgus knees with medial tibial bowing, its effect on tibial component placement during primary TKA and methods to improve accuracy of the component placement were studied. Methods: Full-length weight-bearing alignment radiograph was taken in 117 patients (149 knees) with valgus deformity undergoing TKA. In these cases, the proximal tibial reference for extramedullary jig placement was planned preoperatively with reference to the tibial spines and classified as four zones. Results: The mean preoperative hip–knee–ankle (HKA) angle was 192.9° (180.3–234.5°). Bowing >3° was considered significant ( p < 0.001) and at this level of bowing, the proximal tibial reference was shifted from centre to medial. Tibial bowing <3° was considered straight and >3° as tibia valga. Tibia was bowed in 70 knees (46.97%). Severity of valgus deformity had strong positive correlation with the tibia valga ( p < 0.001). The post-operative medial proximal tibial angle (MPTA) and HKA angle were 91.63° (87.9–95.7°) and 182.6° (178.1–189.7°), respectively. The mean MPTA and post-operative HKA angle in bowed and straight tibiae were 90.35° versus 89.78° ( p = 0.547) and 181.5° versus 180.7° ( p = 0.5716), respectively, and the difference was not statistically significant. Conclusion: Medial tibial bowing is very common in valgus knees. Tibia valga has a strong positive correlation with the severity of valgus deformity. Accurate tibial component placement can be achieved with a medialized reference point for extramedullary tibial cutting jig in knees with significant tibia valga. The study has been registered in clinical trials registry – India (CTRI/2018/03/012283).

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