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Fibrin Clot Delivery System for Meniscal Repair

Suk Hwan JANG ; Jeong Ku HA ; Dong Won LEE ; Jin Goo KIM

The Journal of Korean Knee Society.2011;23(3):180-183.

As meniscal preservation particularly in younger active individuals with a symptomatic meniscal tear remains the preferred treatment option, various methods have been suggested to increase healing and success rates after meniscal repair. The recent increase in clinical use of platelet rich plasma has contributed to the increased use of fibrin clot, which virtually has the same healing property. However, despite the relative ease of acquisition and preparation of fibrin clots, delivering it to the desired target area arthroscopically is challenging. Therefore, we report with a pertinent literature review a novel method of planting a fibrin clot to the desired area of meniscal tear arthroscopically using our delivery system to enhance healing.
Fibrin ; Plants ; Platelet-Rich Plasma

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Surgical Treatment of Habitual Patella Dislocation with Genu Valgum

Ji Hoon KWAK ; Jae Ang SIM ; Nam Ki KIM ; Beom Koo LEE

The Journal of Korean Knee Society.2011;23(3):177-179.

Habitual dislocation of patella is a rare disorder. Sometimes it is associated with angular deformity such as genu valgum. We experienced habitual patella dislocation associated with genu valgum that was treated with corrective osteotomy of distal femur and soft tissue realignment procedure including lateral release and medial reefing.
Congenital Abnormalities ; Dislocations ; Femur ; Genu Valgum ; Osteotomy ; Patella

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A Case of Adult Onset Still's Disease Misdiagnosed as Septic Arthritis

Sang Jun SONG ; Dae Kyung BAE ; Jung Ho NOH ; Geon Wook SEO ; Dong Cheol NAM

The Journal of Korean Knee Society.2011;23(3):171-176.

We present a case of adult onset Still's disease (AOSD) that was misdiagnosed as septic arthritis of the shoulder and knee. A forty-nine-year-old woman was admitted for pain in the left knee. The patient's medical history showed that she had undergone arthroscopic irrigation twice and an open debridement under the diagnosis of septic shoulder at another hospital. The laboratory and joint fluid analysis findings led us to suspect septic knee. Arthroscopic irrigation and antibiotics treatment were performed. At five weeks after discharge, she presented with pain in the same joint, fever, and rash. The symptoms were consistent with Yamaguchi's criteria for AOSD. We started corticosteroid therapy, and clinical remission was achieved. In conclusion, we suggest that AOSD should be considered as a diagnosis of exclusion to avoid misdiagnosis with septic arthritis.
Adult ; Anti-Bacterial Agents ; Arthritis, Infectious ; Debridement ; Diagnostic Errors ; Exanthema ; Female ; Fever ; Humans ; Joints ; Knee ; Shoulder ; Still's Disease, Adult-Onset

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Repair of the Complete Radial Tear of the Anterior Horn of the Medial Meniscus in Rabbits: A Comparison between Simple Pullout Repair and Pullout Repair with Human Bone Marrow Stem Cell Implantation

Jang Hee HONG ; Jong Il PARK ; Kyung Hee KIM ; Young Mo KIM ; Yong Bum JOO ; Yoo Sun JEON

The Journal of Korean Knee Society.2011;23(3):164-170.

PURPOSE: To evaluate the degree of biological healing response that occurs between the anterior horn of the medial meniscus (MM) and the tibial plateau and investigate the biological healing response after injection of human bone marrow stem cells (hBMSCs) in a rabbit model. MATERIALS AND METHODS: Twenty-five rabbits with a mean body weight of 2.5 kg were chosen for this study. On the left knee, a complete radial tear was made at the anterior tibial attachment site of MM and after removal of tibial cartilage, pullout repair of the torn MM was performed on the tibial plateau. On the right knee, the same procedure was performed, and a scaff old (matrix gel) that contained human bone marrow stem cell was implanted between MM and the tibial plateau. A biopsy was performed at 2 (group 1), 4 (group 2), and 8 (group 3) weeks postoperatively. The authors compared the differences in the degree of biological healing of each group and investigated the degree of biologic healing after hBMSC implantation by comparing the left knee with the right knee. RESULTS: On the biopsy of 40 knees of 20 rabbits that survived after operation, all groups did not show the healing response between the undersurface of MM and the tibial plateau. There was no significant difference in terms of the pathological criteria such as fibroblasts and fibrochondrocytes etc., with and without hBMSC implantation. CONCLUSIONS: There was no attachment between the repaired MM and the tibial plateau after complete radial tear on MM and the authors could not identify the effect of hBMSC.
Animals ; Biopsy ; Body Weight ; Bone Marrow ; Cartilage ; Fibroblasts ; Horns ; Humans ; Knee ; Menisci, Tibial ; Rabbits ; Stem Cells

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Comparison between Single and Dual Femoral Fixation for Anterior Cruciate Ligament Reconstruction with a Hamstring Autograft

Jin Goo KIM ; Yong Seuk LEE ; Nam Ki KIM

The Journal of Korean Knee Society.2011;23(3):159-163.

PURPOSE: The purpose of this study was to evaluate dual fixation with different fixation mechanisms, determine the advantages, and compare the outcomes between single and dual femoral fixation. MATERIALS AND METHODS: From April 2004 to September 2007, 19 patients who received single femoral fixation and 22 patients who received dual femoral fixation were enrolled in the study. Single femoral fixation was performed using a cross-pin expansion mechanism. Dual femoral fixation was performed using a cross-pin expansion mechanism and an EndoButton CL loop suspensory mechanism. RESULTS: No significant differences were found in the incidence of cross-pin problems between the two groups (p=0.35-0.83) or in the stability assessment using a KT-2000 arthrometer and pivot shift test preoperatively (p=0.79 and 0.77, respectively) or postoperatively (p=0.89 and 0.75, respectively). In addition, no significant differences were detected between the two groups in the Lysholm, Tegner activity, or International Knee Documentation Committee knee scores preoperatively (p=0.07-0.47) or postoperatively (p=0.15-0.89). CONCLUSIONS: This study showed that dual fixation with different fixation mechanisms was not advantageous over the single fixation mechanism. Outcomes using the dual femoral fixation mechanism were not superior to those using the single femoral fixation mechanism.
Anterior Cruciate Ligament ; Anterior Cruciate Ligament Reconstruction ; Femur ; Humans ; Incidence ; Knee

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Rotational Alignment of Femoral Component for Minimal Medial Collateral Ligament Release in Total Knee Arthroplasty

Je Gyun CHON ; Doo Hoon SUN ; Jae Yong JUNG ; Tae In KIM ; Seong Won JANG

The Journal of Korean Knee Society.2011;23(3):153-158.

PURPOSE: We attempted to determine the degree of rotation of the femoral component to achieve an ideal rectangular flexion gap with minimal medial collateral ligament (MCL) release using a modified measured technique. MATERIALS AND METHODS: Group I consisted of 60 osteoarthritis patients (72 cases) who underwent total knee arthroplasty (TKA) with minimal MCL release and Group II consisted of 48 patients without osteoarthritis (61 cases). We performed computed tomography (CT) scanning of the knee with 90 degree flexion in all of the patients and analyzed the angles between the distal femur landmarks and the tibial mechanical axis using a Picture Archiving Communication system. External rotation of the femoral component from the Whiteside line and posterior condylar line was measured in group I who underwent TKA with minimum MCL release. The variance in the mediolateral flexion gap according to the degree of rotation was also measured using an Auto-Computer Aided Design program. RESULTS: The CT scans showed that the Whiteside line, posterior condylar line, and transepicondylar line was more internally rotated on average from the longitudinal axis of tibia by 4.12degrees, 5.54degrees, and 4.64degrees, respectively, in group I compared to group II. In group I, the femoral component was inserted with an average external rotation of 5.6degrees from the posterior condylar line and with an average external rotation of 2.0degrees from the Whiteside line with minimal MCL release. From the measurements of the femoral component size and the variance in the degree of rotation using an Auto-CAD program, it was found that the change in the mediolateral flexion gap was greater when the rotation angle was greater and it was greater when the size of femoral component was larger at the same rotation angle. CONCLUSIONS: The average rotation angle of the femoral component to achieve an ideal rectangular flexion gap with minimal MCL release in TKA was an external rotation of 5.6degrees from the posterior condylar line and an external rotation of 2.0degrees from the Whiteside line. We concluded that when a femoral component is small in size, greater than average external rotation needs to be applied and when a femoral component is large in size, less than average external rotation needs to be applied.
Arthroplasty ; Axis, Cervical Vertebra ; Collateral Ligaments ; Femur ; Humans ; Knee ; Osteoarthritis ; Tibia

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Can We Use the Posterior Condylar Off set as a Predictive Factor for Overhang of the Implant in Total Knee Arthroplasty?

Yoon Seok YOUM ; Sung Do CHO ; Jin EO ; Ki Bong PARK ; Sun Ho LEE

The Journal of Korean Knee Society.2011;23(3):149-152.

PURPOSE: We tried to demonstrate whether the posterior condylar offset (PCO, the distance from the femoral diaphysis posterior cortex to the posterior condylar margin) and ratio (PCOR, dividing PCO by the maximum antero-posterior diameter of the distal femur) could be used as predictive factors for overhang of the implants or using gender implants in total knee arthroplasty (TKA). MATERIALS AND METHODS: One hundred and one women who underwent TKA using NexGen(R) (LPS) implants, were analyzed prospectively. After distal femoral resection, the mediolateral (ML) width was measured at four points (anterior, distal anterior, distal posterior and posterior) and compared with the ML width of the implant. The aspect ratio (AR, ML/AP ratio) and anterior/distal posterior ML width (Ant/DP) were calculated. Preoperative radiographic PCO and PCOR were measured. Differences of PCO, PCOR, AR and Ant/DP according to the size were analyzed and correlations between PCO, PCOR and AR were also analyzed. The patients were classified into two groups according to the presence of overhang, and differences of each parameter were compared between the two groups. RESULTS: The size of the implant was positively correlated PCO, not significantly correlated with PCOR, and negatively correlated with AR and Ant/DP. PCO and PCOR and AR showed no correlation with each other. PCO and PCOR were not significantly different between the two groups. However, AR and Ant/DP were statistically low in the group with overhang. CONCLUSIONS: Preoperative radiographic PCO or PCOR could not be used as a predictive factor for overhang of the implants or using gender implants in TKA.
Arthroplasty ; Diaphyses ; Female ; Humans ; Knee ; Prospective Studies

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A Comparison of Patella Retention versus Resurfacing for Moderate or Severe Patellar Articular Defects in Total Knee Arthroplasty: Minimum 5-year Follow-up Results

Seung Suk SEO ; Chang Wan KIM ; Sang Won MOON

The Journal of Korean Knee Society.2011;23(3):142-148.

PURPOSE: The purpose of this study is to assess the clinical and radiological results of patients who underwent patellar retention or resurfacing for moderate or severe patellar articular defects during total knee arthroplasty and evaluate the clinical efficacy of patellar resurfacing according to the articular defect of the patella. MATERIALS AND METHODS: From May 2003 to March 2006, 252 patients (277 cases) underwent total knee arthroplasty by one surgeon. Intraoperatively, we divided these patients into a moderate articular defect group (50-75%: group I) and a severe articular defect group (75-100%: group II) and randomly performed patellar resurfacing. The average age was 67.2 years. There were 234 female and 17 male patients. The average follow-up period was 74.6 months. Clinical outcomes were analyzed using the Knee Society (KS) knee score. Functional score, Hospital for Special Surgery (HSS) score, Feller patellar score and range of motion (ROM). Radiological outcomes were analyzed using the congruence angle, Insall-Salvati ratio and patella tilt angle. RESULTS: The KS knee score and functional score at the last follow-up were 84.4/73.1 in the retention group and 85.2/71.8 in the resurfacing group (p=0.80, p=0.63) in group I. In group II, the values were 82.1/75.1 and 87.0/71.2, respectively (p=0.51, p=0.26). The HSS score and Feller patella score were 86.7/20.3 in the retention group and 84.3/21.7 in the resurfacing group (p=0.31, p=0.29) in group I. In group II, the values were 91.6/21.2 and 85.5/22.1, respectively (p=0.37/p=0.30). The knee ROM (p=0.36/p=0.41), congruence angle (p=0.22/p=0.16), Insall-Salvati ratio (p=0.16/p=0.21) and patella tilt angle (p=0.12/p=0.19) were not statistically different between the two groups. CONCLUSIONS: In this study, we could not find any correlations between the degree of patellar articular defect and patellar resurfacing in terms of the clinical and radiological results. Therefore, patellar articular defects is thought to be less meaningful in determining patellar resurfacing.
Arthroplasty ; Female ; Follow-Up Studies ; Humans ; Knee ; Male ; Patella ; Range of Motion, Articular ; Retention (Psychology)

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Rupture of Posterior Cruciate Ligament: Diagnosis and Treatment Principles

Beom Koo LEE ; Shin Woo NAM

The Journal of Korean Knee Society.2011;23(3):135-141.

Posterior cruciate ligament (PCL) injuries associated with multiple ligament injuries can be easily diagnosed, but isolated PCL tears are less symptomatic, very difficult to diagnose, and frequently misdiagnosed. If a detailed investigation of the history of illness suggests a PCL injury, careful physical examinations including the posterior drawer test, dial test, varus and valgus test should be done especially if the patient complains of severe posterior knee pain in >90degrees of flexion. Vascular assessment and treatment should be done to avoid critical complications. An individualized treatment plan should be established after consideration of the type of tear, time after injury, associated collateral ligament injuries, bony alignment, and status of remnant. The rehabilitation should be carried out slower than that after anterior cruciate ligament reconstruction.
Anterior Cruciate Ligament Reconstruction ; Collateral Ligaments ; Humans ; Knee ; Ligaments ; Physical Examination ; Posterior Cruciate Ligament ; Rupture

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Letter from the President of Korean Knee Society

Nam Yong CHOI

The Journal of Korean Knee Society.2011;23(3):134-134.

No abstract available.
Dental Impression Materials ; Knee

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