142 results match your criteria Joint Reduction Patella Dislocation


Medialization of trochlear groove was correlated with extended lateral trochlear in trochlear dysplasia: a transverse CT analysis.

J Orthop Surg Res 2022 May 15;17(1):276. Epub 2022 May 15.

Department of Orthopaedic Surgery, Third Hospital of Hebei Medical University, Ziqiang Road 139, Shijiazhuang, 050051, Hebei, China.

Purpose: To investigate the difference of trochlear width between normal and dysplastic trochlear and to analyze whether the medialization of trochlear groove was correlated with abnormal width of trochlear facets in trochlear dysplasia.

Methods: This study involved CT scans of fifty knees with trochlear dysplasia (TD group) and fifty knees without obvious trochlear dysplasia (Normal group). The linear distance from the medial femoral epicondyle to the various reference points was measured on axial CT images which included the medial edge of medial trochlear facet (dMTE), trochlear groove (dTG), and the lateral edge of lateral trochlear facets (dLTE). Read More

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Double-level torsional osteotomy a treatment for the 'inwardly pointing knee' syndrome.

Arch Orthop Trauma Surg 2022 May 12. Epub 2022 May 12.

Klinik Für Orthopädie Und Unfallchirurgie Klinikum, Buger Straße 80, 96049, Bamberg, Germany.

Introduction: A 'inwardly pointing knee' syndrome is a combined torsional deformity with increased femoral internal and tibial external torsion. After clinical and radiological verification of the torsional deformity and unsuccessful conservative therapy approach, a combined (double level) torsional osteotomy of femur and tibia might be the appropriate treatment. Here, we present the diagnostic algorithms, treatment, and outcome of combined torsional osteotomies of femur and tibia. Read More

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Open knee dislocation, triple intra-articular fractures and patellar tendon rupture: case report of a knee disaster treated with aggressive irrigation/debridement, early anatomic reduction and internal fixation.

BMC Musculoskelet Disord 2022 May 9;23(1):431. Epub 2022 May 9.

Department of Orthopedic and Trauma Surgery, Joint Reconstruction Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.

Background: Open knee fracture-dislocation is a rare orthopedic injury. However, the importance of its correct management could not be overstated. To the best of our knowledge, this is the fifth study reporting a case with simultaneous Hoffa fracture and knee dislocation and the 1 study describing a patient with open plateau fracture-dislocation accompanied with Hoffa fracture, patella fracture, and patellar tendon tear. Read More

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A Randomized Controlled Trial Comparing a Patella-Stabilizing, Motion-Restricting Knee Brace Versus a Neoprene Nonhinged Knee Brace After a First-Time Traumatic Patellar Dislocation.

Am J Sports Med 2022 Jun 19;50(7):1867-1875. Epub 2022 Apr 19.

Unit of Musculoskeletal Surgery, Department of Orthopaedics, Tampere University Hospital, Tampere, Finland.

Background: A traumatic lateral patellar dislocation is a common injury in adolescents and young adults. The majority of first-time dislocations can be treated nonoperatively. Various types of knee braces are used for nonoperative treatment, but evidence on the most preferable bracing method is lacking. Read More

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Medial Patellofemoral Ligament Repair with Suture Tape Augmentation: A Case Series With Five-Year Follow Up.

Surg Technol Int 2022 May;40:363-367

Faculty of Health Sciences and Sport, University of Stirling, Stirling, Scotland.

Introduction: The medial patellofemoral ligament (MPFL) is the main restraining force against lateral patellar displacement in the first 20 degrees of knee flexion and is often disrupted following patellar subluxation or dislocation. MPFL reconstruction is commonly performed to restore patellar stability but requires autograft harvest with associated donor site morbidity. The aim of this study was to assess the five-year outcomes of MPFL repair performed with suture tape augmentation. Read More

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Isolated medial patellofemoral ligament reconstruction is valid to stabilize patellofemoral joint but uncertain to reduce patellar height in setting of lateral patellar dislocation and patella alta.

Arch Orthop Trauma Surg 2022 Apr 1. Epub 2022 Apr 1.

Department of Orthopaedic Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, China.

Introduction: Medial patellofemoral ligament reconstruction (MPFLR) is the most commonly used surgical treatment for patients with lateral patellar dislocation (LPD). It is still poorly understood whether or not MPFLR has a contributory effect on decreasing patellar height.

Materials And Methods: Forty-five patients who underwent isolated MPFLR for LPD and patella alta were evaluated with a mean follow-up period of 24 months (22-25 months). Read More

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MPFL reconstruction corrects patella alta: a cohort study.

Eur J Orthop Surg Traumatol 2022 Jul 22;32(5):883-889. Epub 2021 Jun 22.

Division of Sports Medicine and Surgery, Department of Orthopaedic Surgery, National University Hospital, Singapore, Singapore.

Purpose: Patella alta is an established risk factor for recurrent lateral patella dislocations. Medial patellofemoral ligament (MPFL) reconstruction has been shown to reduce patella height. Our hypothesis is that isolated MPFL reconstruction corrects patella alta, thereby reducing the risk of recurrent patella dislocation. Read More

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Superior Patellar Dislocation Reduced by Intra-articular Injection: A Case Report and Review of Literature.

JBJS Case Connect 2021 06 8;11(2). Epub 2021 Jun 8.

Surgery Service, Department of Veterans Affairs, Cincinnati, Ohio.

Case: A 53-year-old woman presented with a locked knee after an atraumatic hyperextension episode. Imaging showed an anterior tilt of the patella hinging over the superior trochlear margin, consistent with a superior patellar dislocation. The patella spontaneously reduced on an intra-articular injection with 15 mL of lidocaine in normal saline, after which she was able to actively range her knee. Read More

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Medial Patellofemoral Ligament Reconstruction for Adolescents With Acute First-Time Patellar Dislocation With an Associated Loose Body.

Am J Sports Med 2021 07 7;49(8):2159-2164. Epub 2021 Jun 7.

Division of Orthopedic Surgery, Rady Children's Hospital, San Diego, California, USA.

Background: The management of adolescents with acute first-time patellar dislocation with an associated loose body remains a debated topic. The rate of recurrent dislocation in these patients may be up to 61% if the medial patellofemoral ligament (MPFL) is repaired or not addressed surgically. To our knowledge, a prospective evaluation of MPFL reconstruction for adolescents with acute first-time patellar dislocation with an associated chondral or osteochondral loose body has not been previously performed. Read More

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Allograft Medial Patellofemoral Ligament Reconstruction in Adolescent Patients Results in a Low Recurrence Rate of Patellar Dislocation or Subluxation at Midterm Follow-Up.

Arthroscopy 2022 01 15;38(1):128-138. Epub 2021 May 15.

Department of Orthopaedic Surgery, Benioff Children's Hospital Oakland, University of California, San Francisco, San Francisco, California, U.S.A.. Electronic address:

Purpose: To evaluate rates of recurrent instability in adolescent patients with medial patellofemoral ligament (MPFL) reconstruction with allograft and associations of anatomic risk factors with complications.

Methods: A retrospective review identified patients of a single surgeon who underwent MPFL reconstruction with allograft for recurrent patellar instability with minimum 2-year follow-up. Surgical management was recommended after a minimum 6 weeks of nonoperative management and included MPFL reconstruction with gracilis allograft using a double-bundle technique. Read More

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January 2022

[Emergency treatment of dislocation of large joints].

Unfallchirurg 2021 May;124(5):391-406

Klinik für Orthopädie, Unfallchirurgie und Sporttraumatologie, Marienhaus Klinikum Hetzelstift, Stiftstraße 10, 67435, Neustadt an der Weinstraße, Deutschland.

Joint dislocations are always accompanied by rupture of the joint capsule. Depending on the forces exerted on the joint as well as individual bone quality, fractures (dislocation fractures) and injuries to ligaments occur. As blood vessels and nerves can also be damaged, reduction is an urgent measure. Read More

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Changes in pain catastrophization and neuropathic pain following operative stabilisation for patellofemoral instability: a prospective study with twelve month follow-up.

Int Orthop 2021 07 20;45(7):1745-1750. Epub 2021 Apr 20.

St George's University Hospitals NHS Foundation Trust, London, UK.

Purpose: To determine the prevalence and change in neuropathic pain or pain catastrophizing before and 12 months following patellar stabilisation surgery for patellofemoral instability.

Methods: We conducted a prospective clinical audit within a UK NHS orthopaedic surgical centre. Data from 84 patients with patellofemoral instability requiring stabilisation were analysed. Read More

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Patellar Apprehension Is Reduced in Most but Not All Patients After Successful Patellar Stabilization.

Am J Sports Med 2021 03 18;49(4):975-981. Epub 2021 Feb 18.

Department of Health and Physical Education, Mount Royal University, Calgary, Alberta, Canada.

Background: The clinical sign of patellar laxity and the associated symptom of apprehension are mainstays of the physical examination of patellofemoral instability. The apprehension test is widely used as a diagnostic tool and also as an outcome following patellofemoral stabilization surgery. Despite widespread use, the validity, reliability, and responsiveness of the apprehension test have not been established. Read More

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Closed Reduction of an Irreducible Knee Dislocation: A Case Report.

J Orthop Case Rep 2020 Oct;10(7):6-10

Department of Orthopedic Sports Medicine, Marshall University, 1600 Medical Center Dr., Huntington, WV 25701, United States.

Addition To Orthopedic Literature: Posterolateral knee dislocations are extremely rare and generally require open reduction; however, we were able to provide closed reduction by reproducing mechanism of injury with a technique described in the literature. This is the second reported case of such accomplishment.

Introduction: Posterolateral knee dislocation is the most common form of "irreducible" knee dislocations. Read More

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October 2020

Horizontal Intraarticular Dislocation of the Patella: Case Report.

Rev Bras Ortop (Sao Paulo) 2020 Dec 2;55(6):800-803. Epub 2020 Apr 2.

Serviço de Ortopedia e Traumatologia, Hospital Universitário Cajuru, Curitiba, Brasil.

Intraarticular dislocation of the patella is an uncommon condition, with displacement in the horizontal or vertical plane, which may be associated with total or partial lesion/rupture of the quadriceps tendon, with osteochondral or collateral ligament injury. Risk factors are ligament laxity, patellar hypermobility, high patella, and trochlear dysplasia. This condition is more common in young people and may require blood reduction. Read More

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December 2020

[A rare cause of an acutely locked knee joint: superior patellar dislocation].

Unfallchirurg 2021 May 16;124(5):407-411. Epub 2020 Oct 16.

Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48147, Münster, Deutschland.

The case of a 56-year-old male patient with locking of the knee in extension without trauma is presented. Patient history, clinical examination and radiographs confirmed a superior dislocation of the patella. Closed reduction led to full weight bearing with free range of motion without further complaints. Read More

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Femoral Head Fracture without Dislocation of Hip in a Young Adult: A Case Report.

J Orthop Case Rep 2020 ;10(2):58-61

Department of Orthopaedic Surgery, Barod Hospital, Indore, Madhya Pradesh, India.

Introduction: Femoral head fractures are a rare pathology most often arising with high-energy traumas and associated with hip dislocations, which gravely compromise the ultimate functional outcome of the hip. Femoral head fractures without dislocation or subluxation are extremely rare injuries.

Case Report: A 23-year-old male who sustained a high-energy trauma due to road traffic accident. Read More

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January 2020

A Rotated and Laterally Displaced Patellar Dislocation.

J Emerg Med 2020 Jul 23;59(1):121-124. Epub 2020 May 23.

University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.

Background: Patellar dislocations are a common orthopedic emergency with several variants. The rarer variants include rotational dislocations. These often require open reduction in the operating room. Read More

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Technique for Reduction and Fixation of a Hoffa Fracture with Ipsilateral Patella Dislocation from Low-Energy Trauma, a Rare Injury: A Case Report.

JBJS Case Connect 2020 Jan-Mar;10(1):e0250

Department of Orthopaedic Surgery, Virginia Commonwealth University Health Systems, Richmond, Virginia.

Case: A 25-year-old man sustained a right femur Hoffa fracture with an ipsilateral patella dislocation from a twisting injury to his right knee. He underwent open reduction and internal fixation of the right femur with medial patellofemoral ligament (MPFL) reconstruction with allograft. One year postoperatively, he had returned to full activity and painless range of motion. Read More

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January 2021

Treatment of Osteochondral Fracture of the Lateral Femoral Condyle with TWINFIX Ti Suture Anchor "X"-Shaped Internal Fixation under Arthroscopy: A Surgical Technique and Three Cases Report.

Orthop Surg 2020 Apr 11;12(2):679-685. Epub 2020 Mar 11.

Investigation performed at Center for Joint Surgery, Third Affiliated Hospital of Guangxi Medical University, Nanning Second People's Hospital, Nanning, China.

Osteochondral fracture of the lateral femoral condyle is a rare intra-articular injury with or without patellar dislocation. This kind of disease is commonly seen in the knee joint sprain during strenuous activity. At present, open reduction is often used to treat osteochondral fractures. Read More

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Single- versus double-bundle patellar graft insertion for isolated MPFL reconstruction in patients with patellofemoral instability: a systematic review of the literature.

Arch Orthop Trauma Surg 2020 Jun 21;140(6):769-776. Epub 2020 Feb 21.

Department of Orthopaedics, RWTH Aachen University Clinic, Pauwelsstraße 30, 52074, Aachen, Germany.

Introduction: The MPFL reconstruction is performed either via a single-bundle (SB) or double-bundle (DB) procedure. The purpose of this study is to perform a systematic review comparing SB versus DB graft for recurrent patellofemoral instability, to summarize current evidence, and to clarify the role of both techniques. We focused on clinical scores, physical examination, complications, revision surgeries, and failures. Read More

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How Does Isolated Medial Patellofemoral Ligament Reconstruction Influence Patellar Height?

Am J Sports Med 2020 03 14;48(4):895-900. Epub 2020 Feb 14.

FIFA Medical Center of Excellence, Orthopaedics Surgery and Sports Medicine Department, Croix Rousse Hospital, Civil Hospices of Lyon, Lyon, France.

Background: Reconstruction of the medial patellofemoral ligament (MPFL) is the gold standard treatment for recurrent patellar dislocation. Patella alta has been reported in about half of patients with recurrent patellofemoral instability.

Hypothesis: MPFL reconstruction (MPFLr) has a beneficial role in the correction of patellar height in patients with mild patella alta (Caton-Deschamps index [CDI] between 1. Read More

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Graft choice for isolated MPFL reconstruction: gracilis versus semitendinosus.

Eur J Orthop Surg Traumatol 2020 Jul 1;30(5):763-770. Epub 2020 Feb 1.

Department of Orthopaedics, RWTH Aachen University Clinic, Pauwelsstraße 30, 52074, Aachen, Germany.

Introduction: After the first patellar dislocation, most patients report damage of the medio-patellofemoral ligament (MPFL) and surgical reconstruction is required. The purpose of this study is to systematically review current evidence and to clarify the role of the gracilis and semitendinosus tendons as graft for isolated MPFL reconstruction.

Materials And Methods: The present systematic review was conducted according to the PRISMA guidelines. Read More

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Hoffa fracture associated with tibial shaft fracture and multiple ligament avulsion fractures: A case report.

Trauma Case Rep 2020 Apr 17;26:100277. Epub 2020 Jan 17.

Department of Orthopaedics, The Second Xiangya Hospital, Central South University, Changsha, PR China.

Hoffa fracture combined with tibial shaft fracture and multiple ligament avulsion injuries is extremely rare. Herein, we report a case of medial Hoffa fracture with associated fracture of tibial shaft and avulsion fractures of multiple ligaments secondary to knee dislocation. A 17-year-old female with history of a motorcycle accident was referred to our hospital after knee joint reduction at a regional trauma center. Read More

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[Close reduction for the treatment of inferior intra-articular dislocation of patella:a case report and literature review].

Zhongguo Gu Shang 2019 08;32(8):772-774

Department of Orthopaedics, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi, China;

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Irreducible Acute Patellar Dislocation due to a New Anatomical Variant - the Notched Patella.

Rev Bras Ortop (Sao Paulo) 2019 Feb 1;54(1):90-94. Epub 2019 Mar 1.

Departamento de Ortopedia e Traumatologia, Hospital de Cascais Dr. José de Almeida, Cascais, Portugal.

Irreducible patella dislocations are rare and are usually associated with complex mechanisms. The authors report the clinical case of an irreducible lateral patellar dislocation due to an anatomical variant. The authors assisted a 16-year-old patient who presented with a lateral patella dislocation that was impossible to reduce by closed manipulation, even under general anesthesia. Read More

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February 2019

Upper pole sleeve fracture of the patella secondary to patellar dislocation: A case report.

Medicine (Baltimore) 2019 Jun;98(24):e16011

Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, China.

Rationale: Upper pole sleeve fractures of the patella are rare in adolescents; however, they are serious injuries that require early diagnosis and treatment.

Patient Concerns: We present a rare case of a 15-year-old girl who suffered a sleeve fracture at the superior pole of the right patella. The patient had a history of dislocation of the patella 2 weeks ago. Read More

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Medial Patellofemoral Ligament Reconstruction in Traumatic Patellar Dislocation without Patellar Fixation.

J Knee Surg 2020 Oct 23;33(10):998-1003. Epub 2019 May 23.

Department of Physical Medicine, Al-Razi Orthopaedic Hospital, Kuwait City, Kuwait.

Acute traumatic patellar dislocation is a common injury, and spontaneous reduction may occur at the time of injury or may be reduced at the field of the accident by someone. It may be associated with osteochondral fractures and rupture of medial patellar stabilizers leading to recurrent patellar instability. The aim of this prospective study was to evaluate the outcomes of medial patellofemoral (PF) ligament (MPFL) reconstruction in recurrent traumatic patellar dislocation. Read More

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October 2020

Intra-articular dislocation of the patella: a rare variant to an uncommon injury.

BMJ Case Rep 2019 Apr 24;12(4). Epub 2019 Apr 24.

Department of Orthopaedics, Post Graduate Institute of Medical Education and Research, Chandigarh, Chandigarh, India.

Horizontal intra-articular dislocation of the patella is a very rare traumatic entity. We present an unusual case of horizontal intra-articular dislocation in which the patellar articular surface was facing upwards besides having an avulsion of the quadriceps tendon from the superior pole. There was associated posterolateral knee subluxation, which has not been described with intra-articular dislocation of the patella. Read More

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A Cam-Post Mechanism Is No Longer Necessary in Modern Primary Total Knee Arthroplasty.

J Knee Surg 2019 Aug 1;32(8):710-713. Epub 2019 Mar 1.

Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida.

Conclusive evidence supporting a clinical difference between posterior-stabilized (PS) and cruciate-retaining (CR) designs in total knee arthroplasty (TKA) does not currently exist, despite both designs being used for decades. Proponents of PS designs that employ a cam-and-post mechanism cite in vivo fluoroscopic data that demonstrate improved posterior rollback; however, optimal rollback has never been correlated to superior clinical outcomes. Recently, anterior-lipped and more conforming CR bearings, such as ultracongruent, medial pivot, and dual-pivot designs, have been used to substitute for the posterior cruciate ligament and obviate the need for the cam-post mechanism of a traditional PS design. Read More

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