• The Journal of the Korean bone and joint tumor society
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• v.5 no.4
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• pp.235-238
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• 1999

Chondroblastoma of the patella is a uncommon benign neoplasm in the middle aged person. Furthermore, a hemorrhagic cystic change associated with chondroblastoma is extremely rare. We experienced a case of chondroblastoma which underwent hemorrhgic cystic change. A fiftyyear-old female patient has suffered from right knee joint pain for 1 month before. Dominant gross feature was hemorrhagic cyst which was not involved into the joint space. Soft tissue was curetted and it was diagnosed to be chondroblastoma. The case was treated with curettage and bone graft.

• Korean Journal of Radiology
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• v.23 no.6
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• pp.674-687
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• 2022

Patellofemoral instability (PFI) is common in pediatric knee injuries. PFI results from loss of balance in the dynamic relationship of the patella in the femoral trochlear groove. Patellar lateral dislocation, which is at the extreme of the PFI, results from medial stabilizer injury and leads to the patella hitting the lateral femoral condyle. Multiple contributing factors to PFI have been described, including anatomical variants and altered biomechanics. Femoral condyle dysplasia is a major risk factor for PFI. Medial stabilizer injury contributes to PFI by creating an imbalance in dynamic vectors of the patella. Increased Q angle, femoral anteversion, and lateral insertion of the patellar tendon are additional contributing factors that affect dynamic vectors on the patella. An imbalance in the dynamics results in patellofemoral malalignment, which can be recognized by the presence of patella alta, patellar lateral tilt, and lateral subluxation. Dynamic cross-sectional images are useful for in vivo tracking of the patella in patients with PFI. Therapeutic approaches aim to restore normal patellofemoral dynamics and prevent persistent PFI. In this article, the imaging findings of PFI, including risk factors and characteristic findings of acute lateral patellar dislocation, are reviewed. Non-surgical and surgical approaches to PFI in pediatric patients are discussed.

• Journal of Trauma and Injury
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• v.34 no.4
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• pp.305-308
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• 2021

Comminuted fractures of the patella mostly occur at the inferior pole and require appropriate reduction and fixation to restore the extensor mechanism. Conventional methods such as tension-band wiring are not enough to gain proper fixation strength. Numerous methods have been reported, including circumferential cerclage wiring, osteosynthesis, and suture anchors depending on the fracture pattern. Herein, the author reports a relatively rare case of a comminuted fracture of the upper pole of the patella, for which we used augmented Krackow sutures in the quadriceps and fixation with tying of the suture limbs through patellar bone tunnels. Satisfactory results were obtained in terms of reduction and extensor mechanism recovery.

• Archives of Plastic Surgery
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• v.34 no.5
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• pp.562-568
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• 2007

Purpose: Many studies reported anatomy of posterior tibial artery perforator. But, it is not easy to use this flap in clinical case. Methods: Authors performed cadaver dissection on 26 legs from 13 cadavers and identified the number, location, type, length and diameter of perforator. Based on anatomic study, posterior tibial artery perforator flap was performed on 3 clinical cases. Results: The perforator was found on a line drawn from the medial boarder of central patella to posterior boarder of medial malleolus. The main perforator which was longer and greater caliber than others was found was found 13 to 17cm distant from medial boarder of central patella in 23 of 26 leg(88.5%). Average length was 6.2cm and average diameter was 1.4mm. The main perforator was musculocutaneous perforator at 20 of 26 leg(77%). The posterior tibial artery perforator flap was clinically use in 3 cases. All flap were survived without any complication. Conclusion: The author found the main perforator of posterior tibial artery perforator flap was located 15cm distant from medial boarder of central patella within the circle drawn with a radius of 4cm. The posterior tibial artery perforator flap is expected to be used as one of the option for the reconstruction of hand and foot.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.28 no.3
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• pp.89-99
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• 2022

Background: The purpose of this study was to investigate the effects of physical therapy intervention with local vibration on the physical function of patients with traumatic patella fractures. Methods: This study recruited 6 subjects who had suffered traumatic patella fractures. The study was conducted for an average of 12.8 weeks. Before the treatment (2 weeks post-surgery), they were evaluated using the numeric pain rating scale (NPRS), the Korean-version of the impact of event scale-revised (IES-R-K), pressure pain threshold (PPT), range of motion (ROM) of the knee joint, and the Korean knee injury and osteoarthritis outcome score (K-KOOS) and were reevaluated after 7 and 12 weeks, post-surgery. This study was conducted according to ORIF Patella Fracture Post-Operative Rehabilitation Protocol after applying local vibration. The protocol consists of Phases 1~5 and this study has been applied from phase 2. Results: A comparison of the performance of the participants before and after the intervention showed a decrease in NPRS (9.83±.41→4.83±.98), IES-R-K (68.67±2.73→23.83±2.40), and K-KOOS (Function, Daily living: 70.5±5.96→34.0±3.35, Function, Sports and Recreational activities: 22.83±2.32→10.77±1.37, Quality of Life: 19.33±7.33→7.33±.52) scores. And the ROM (Knee flexion: 30.0±4.47°→128.73±3.6°, Knee extension: -6.83±2.48°→-1.33±1.03°) and PPT (9.67±.52kg/cm²→22.44±2.33kg/cm²) scores increased. Conclusion: These results show that physical intervention with local vibration using a Blackroll® booster and head can help to improve pain, physical function, and psychological status. Also, it was possible to select interventions depending on the patient's condition and the desired goal, using physical intervention with the Blackroll® booster technique.

• Journal of Veterinary Clinics
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• v.33 no.6
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• pp.385-388
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• 2016

A 2-year-old, castrated male Chihuahua dog was referred for revision surgery for reluxation of the patella following surgery for medial patellar luxation (MPL) of the left stifle joint. On general inspection, the patient showed bilateral hindlimb weight-bearing lameness. On physical examination, bilateral non-reducible MPL was detected through palpation. Radiographs revealed bone deformities of both hindlimbs. Computed tomography (CT) was applied for a three-dimensional (3D) printing bone model to establish an accurate surgical plan. The bone plate was pre-contoured over the 3D-printing bone model after execution of corrective osteotomy and sterilized prior to use in surgery. Corrective osteotomy was performed through a staged, bilateral procedure. The patient showed improvement of limb function following surgery without reluxation of the patella. The use of 3D-printing bone model for accurate surgical planning of corrective osteotomy appears to be effective in increasing the accuracy of surgery. That may lead to successful surgical outcomes.

• Knee surgery & related research
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• v.30 no.4
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• pp.334-340
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• 2018

Purpose: The purposes of this study were to compare clinical results after total knee arthroplasty (TKA) using the Attune and PFC Sigma knee designs and to investigate whether the use of the Attune prosthesis increased the risk of patellar injury in Asian patients. Materials and Methods: Three hundred knees that underwent TKA using Attune (group A) were compared to 300 knees that underwent TKA using PFC Sigma (group B). The Knee Society Knee Score (KS) and Function Score (FS), and range of motion (ROM) were compared. The residual patellar thickness was compared to evaluate the risk of patellar injury. Results: The postoperative KS and ROM of group A were better than those of group B (93.1 vs. 88.8, p<0.001 and $131.4^{\circ}$ vs. $129.0^{\circ}$, p=0.008, respectively). The postoperative FS did not differ significantly between the two groups (80.9 vs. 78.7, p=0.427). The residual patella was thinner in group A (14.8 mm vs. 15.7 mm, p=0.003), which made up a higher proportion of the high-risk group for patellar fractures with a residual thickness of <12 mm (7.5% vs. 2.1%, p=0.003). Conclusions: TKA using the Attune prosthesis provided more favorable clinical results than TKA using PFC Sigma. However, the risk of injury in the residual patella was increased with use of the Attune prosthesis in Asian patients.

• 대한정형외과스포츠의학회:학술대회논문집
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• 2004.09a
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• pp.29-30
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• 2004

• Journal of Korean Orthopaedic Sports Medicine
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• v.9 no.2
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• pp.85-90
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• 2010

Purpose: To evaluate the results of percutaneous lateral release and arthroscopic medial plication for patients with recurrent patella dislocation. Materials and Methods: This study includes the thirty-one cases of patients who have had a surgical operation from March 2001 to March 2008. All the patients had recurrent patella dislocation after trauma history. The average age was 24.2 years old and the average follow up was 47.4 months (minimum 24 months). Results: The preoperative congruence angle, lateral patellofemoral angle, Lysholm score was $24.8^{\circ}$, $-6.2^{\circ}$, 75 points on average respectively. However, the postoperative congruence angle, lateral patellofemoral angle, Lysholm score was improved to normal range: $-2.8^{\circ}$, $10.2^{\circ}$, 95 points on average. Five cases showed the recurrent dislocation after operation. Among them, three cases showed femoral trochlear dysplasia. Conclusion: Percutaneous lateral release and arthroscopic medial plication showed satisfactory results for recurrent patella dislocation with low complication rate. However, in cases with femoral trochlear dysplasia, another surgical treatment may be considered.

• Journal of The Korean Society of Integrative Medicine
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• v.8 no.1
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• pp.1-14
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• 2020

Purpose : The purpose of this study was to investigate the effect of an exercise program with patella mobilization on range of motion, muscle strength, and gait in patients with total knee arthroplasty. Methods : Thirty patients under the age of 65 who visited the T hospital in Daegu Metropolitan City and underwent total knee arthroplasty surgery were selected for this study. Fifteen patients were randomly assigned to the experimental group and took part in an exercise program with patella mobilization, and fifteen patients were randomly assigned to the control group and took part in just the exercise program. Each group took part in their intervention three times a week for four weeks. The measurement tools used included a goniometer, handheld dynamometer, and 10-meter walking test. In the statistical analysis results, to compare the about pre and post test differences within each group, a paried t-test was used, and to compare the differences between each group, an independent t-test was used. Results : There was a significant difference (p<.05) in the range of motion, muscle strength of the quadriceps femoris and, hamstrings, and 10-meter walking test within each individual group and between the two groups before and after the intervention (p<.05). Conclusion : All the results for the experimental group were significant. Therefore, it is expected that an exercise program with patella mobilization will be helpful for the recovery of the knee joint in patients who have undergone total knee arthroplasty.