• Journal of the Korean Orthopaedic Association
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• v.56 no.3
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• pp.272-276
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• 2021

Most acute patella dislocations can be reduced closely using a spontaneous or simple maneuver, but it may not be possible if accompanied the by anomalies, such as rotation of the patella, osteophyte ridge protruding from the femur, or anatomical variations. This case report outlines irreducible acute patella dislocation with anatomical variations, a notched patella. If the reduction of an acute patella dislocation fails, an additional radiological examination and reduction under general anesthesia may be necessary with the possibility of an anatomical variant in mind.

• 대한관절경학회:학술대회논문집
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• 2006.11a
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• pp.27-27
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• 2006

• Journal of Veterinary Clinics
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• v.31 no.2
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• pp.133-136
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• 2014

An 8 kg, 9-month-old castrated male Shiba Inu presented with a history of intermittent bilateral hind limb lameness. On examination, grade III medial patellar luxation of the bilateral hind limbs was diagnosed. A novel surgical method involving relatively noninvasive tibial tuberosity transposition was used to restore normal alignment of the quadriceps mechanism. The procedure involved an incision on the medial cortical bone of the tibial tuberosity along the tibial crest and placement of a cortical screw on the medial side of the tibial crest to laterally transpose the tibial tuberosity. Lameness and patellar luxation of bilateral hind limbs were improved at a 3-month postoperative examination. This technique could be considered an effective treatment for medial patellar luxation in skeletal immature patients.

• Journal of the Korean Arthroscopy Society
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• v.10 no.1
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• pp.33-38
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• 2006

Purpose: This study seeks to address the results of percutaneous lateral release and medial reefing for patients with recurrent patellar dislocation. Materials and Methods: This paper focuses on 27 cases from 25 patients who had a surgical operation at our hospital in a span of eight years and six months from the time of December 1996 to May 2005. The subjects consist of 11 males and 14 females, and their average age was 22.2 years old. All the patients had their trauma history, and the average frequency of dislocation before surgery was 11.5 times. Results: The congruence angle before operation was 23.3 degree on the average, while the lateral patellofemoral angle was -5.7 degree on average. However, the congruence angle after surgery came to -2.4 degree, while the lateral patellofemoral angle recovered to the normal range of within 11.5 degrees. Four cases showed the recurrent dislocation, and two out of those four cases had -35, -12 degrees of their lateral patellofemoral angle respectively and 59, 14 degrees of their congruence angle respectively. Conclusion: Using percutaneous lateral release with medial reefing can be considered as an effective treatment for recurrent patellar dislocation

• Journal of the Korean Arthroscopy Society
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• v.10 no.2
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• pp.214-218
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• 2006

Purpose: We describe a new technique of arthroscopic medial plication using pull-out suture with consideration of anatomical location of medial patellofemoral ligament for the treatment of acute or recurrent patellar dislocation. Operative technique: Under arthroscopic examination, sutures are passed through the medial capsule, at which medial patellofemoral ligament is located, from outside to inside of knee joint. Three guide wires are inserted from anterior surface of the patella to upper half of its medial border. Intraarticular portions of sutures are pulled out toward anterior surface of the patella through bony tunnels. Under appropriate tension, the sutures are tied after performing lateral retinacular release. Conclusion: As suturing medial patellofemoral ligament, this technique can maximize the effect of medial plication and can correct subluxation and tilt of the patella. It seems to be a minimally invasive, easy and effective method for the treatment of acute or recurrent patellar dislocation.

• 대한관절경학회:학술대회논문집
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• 2008.04a
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• pp.98-111
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• 2008

슬개대퇴 불안정성의 진단은 정확한 해부학적 지식을 바탕으로 역동적인(dynamic) 기전을 이해하여야 한다. 슬개골의 저명한 탈구는 쉽게 진단되지만, 경미한 외상으로 슬개골이 탈구되어 정복된 후에는 올바른 진찰(dynamic study)없이 방사선 검사(static study)으로 진단을 놓치는 경우가 많다. 그러므로 병력, 이학적 진찰, 방사선 검사, CT, MRI 그리고 관절경 검사까지 다양하게 필요할 수 있다.

• Journal of Veterinary Clinics
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• v.32 no.1
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• pp.16-21
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• 2015

Medial patellar luxation (MPL) of dog is one of the most common joint diseases. This study performed to know rehabilitative effect after reconstruction as application with intramuscular electrostimulation (IMES) on the cranial part of sartorius muscle. In this study, the 12 dogs with operated medial luxation divided into electrostimulation group (n = 8) and no electrostimulation group (n = 4) measured affected sided range of motion, muscle mass, lameness score and weight bearing for hospitalization 2 weeks. IMES group showed significant results after operation on 5th day (p < 0.01). Except lameness score, IMES group showed significant results on 10th day (p < 0.05). As results, in small sized dog after reconstruction of MPL, IMES on the cranial part of sartorius muscle considered a great help in the initial rehabilitation.

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.421-424
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• 2014

Three small-breed dogs with grade IV medial patellar luxation were presented. In all cases, patellar luxation could not be reduced by conventional surgical techniques. Femoral shortening osteotomy was performed in all dogs to correct patellar luxation. In all the dogs, the clinical condition was remarkably improved, and following surgical procedures, no complication or recurrence was presented. Femoral shortening osteotomy is an effective treatment in small-breed dogs with medial patellar luxation associated with severe skeletal deformity.

• Journal of the Korean Arthroscopy Society
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• v.5 no.2
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• pp.104-110
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• 2001

Purpose : To analyze the patterns of osteochondral fracture associated with patellar dislocation and to assess the results of arthroscopic treatment. Materials and Methods : Fourteen patients were treated from March, 1989 to April, 1998 for patellar dislocations with osteochondral fracture. The average follow-up was 32 months. All were treated by arthroscopic procedures. The location and size of the fracture fragments were recorded. To assess the functional results, we used Larsen & Lauridson's score system. Results : Osteochondral fractures were found 8 cases in medial side of patella, 1 case in lateral side of patella, 5 cases in lateral margin of lateral femoral condyle. The range of maximal diameter of osteochondral fragment was from 1cm to 4.2cm. Treatments include fragment excision only in 6 cases, excision and medial retinacular repair in 2 cases, excision and medial retinacular repair and lateral retinacular release in 3 cases, and internal fixation only in 3 cases. The functional results were excellent in 5 cases$(36\%)$. good in 6 cases$(43\%)$, fair in 1 case$(7\%)$ and poor in 2 cases$(14\%)$. Conclusion : In osteochondral fractures associated with patellar dislocation, arthroscopic treatment is useful to diagnose precisely, to determine proper treatment modality, and to minimize the complications.

• 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.