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  1. Article ; Online: Ossification of the posterior capitellum: description of a new pathology and its radiological appearance.

    Schneider, M M / Hollinger, B / Zimmerer, A / Nietschke, R / Michaely, H / Migliorini, F / Maffulli, N / Burkhart, K J

    Archives of orthopaedic and trauma surgery

    2022  Volume 143, Issue 7, Page(s) 4019–4029

    Abstract: Background: Boxer elbow and handball goalkeeper elbow are causes of impingement characterized by osteophytes formation at the olecranon and coronoid tip as well as their corresponding fossae. Herein, we present another distinct pathology in these ... ...

    Abstract Background: Boxer elbow and handball goalkeeper elbow are causes of impingement characterized by osteophytes formation at the olecranon and coronoid tip as well as their corresponding fossae. Herein, we present another distinct pathology in these patients: the formation of an exostosis at the posterolateral aspect of the elbow.
    Methods: Between April 2016 and May 2020, 12 athletes with boxer elbow and handball goalkeeper elbow (mean age of 22 years) suffering from elbow pain were enrolled in the present study. Plain radiography, magnetic resonance imaging (MRI), and computer tomography (CT) scans were used to evaluate the bone conformation of the posterolateral aspect of the elbow. Assessment and staging of the ossification was performed by two independent fellowship-trained elbow surgeons.
    Results: Bone marrow edema of the posterior aspect of the elbow at the origin of the anconeus muscle was initially detected in MRI scans. With the progression of the condition, imaging revealed an ossification posterior to the capitellum with bony bridges. In the advanced stage of the disease, the exostoses was unstable as the ossification had no adherence to the posterior capitellum during surgical excision. Plain radiographs are limited in their ability to detect the condition, whereas MRI and CT scans allow to identify a signal enhancement at the posterolateral aspect of the elbow.
    Conclusion: In patients without history of elbow trauma, bony irregularities of the posterior aspect of the capitellum may indicate ossification of the posterolateral aspect of the elbow, most likely caused by repetitive hyperextensions.
    MeSH term(s) Humans ; Young Adult ; Adult ; Osteogenesis ; Elbow ; Elbow Joint/diagnostic imaging ; Elbow Joint/surgery ; Radiography ; Joint Diseases
    Language English
    Publishing date 2022-11-18
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-022-04689-7
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  2. Article: Tennisellenbogen. Arthroskopische Behandlung der medialen und lateralen Epikondylitis

    Schneider, M. M. / Nietschke, R. / Burkhart, K. J. / Hollinger, B.

    Arthroskopie und Gelenkchirurgie

    2019  Volume 32, Issue 4, Page(s) 243

    Language German
    Document type Article
    ZDB-ID 2968086-4
    ISSN 0933-7946 ; 2629-4729
    Database Current Contents Medicine

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  3. Article ; Online: Reliability, validity and critical appraisal of the cross-cultural adapted German version of the Mayo Elbow Performance Score (MEPS-G).

    Papen, A / Schöttker-Königer, T / Schäfer, A / Morrison, F / Hollinger, B / Burkhart, K J / Nietschke, R / Zimmerer, A / Maffulli, N / Migliorini, F / Schneider, Marco M

    Journal of orthopaedic surgery and research

    2022  Volume 17, Issue 1, Page(s) 328

    Abstract: Background: The Mayo Elbow Performance Score (MEPS) is a rating system consisting of four dimensions to evaluate elbow performance. It is a common tool for assessment of elbow impairments worldwide. We determined the validity and reliability of its ... ...

    Abstract Background: The Mayo Elbow Performance Score (MEPS) is a rating system consisting of four dimensions to evaluate elbow performance. It is a common tool for assessment of elbow impairments worldwide. We determined the validity and reliability of its German version (MEPS-G) after cross-cultural adaptation.
    Methods: Six investigators examined 57 patients with elbow pathologies. The MEPS-G was compared to validated elbow scores such as the German versions of DASH, the Oxford Elbow Score, pain level and subjective elbow performance on a VAS. Inter-rater reliability (IRR) and validity of the score and its dimensions were also reviewed. Verification was performed using the intraclass correlation coefficient (ICC), the prevalence and bias with adjusted Kappa (PABAK) and the Spearman correlation.
    Results: The IRR of the MEPS-G score was moderate (ICC (2.1) = 0.65). The IRR of the four individual dimensions was moderate to high (K
    Conclusion: The MEPS-G is not sufficiently valid, which is consistent with its English version. The patient-based dimensions were a weakness, demonstrating high risk of bias. There is no general recommendation for the utilization of the MEPS-G as outcome measurement for patients with elbow pathologies.
    MeSH term(s) Cross-Cultural Comparison ; Elbow ; Humans ; Pain ; Reproducibility of Results ; Surveys and Questionnaires
    Language English
    Publishing date 2022-06-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 2252548-8
    ISSN 1749-799X ; 1749-799X
    ISSN (online) 1749-799X
    ISSN 1749-799X
    DOI 10.1186/s13018-022-03210-5
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  4. Article ; Online: Correction to: Results after arthroscopic treatment of iliopsoas impingement after total hip arthroplasty.

    Zimmerer, A / Hauschild, M / Nietschke, R / Schneider, M M / Wassilew, G / Sobau, C / Miehlke, W

    Archives of orthopaedic and trauma surgery

    2020  Volume 142, Issue 5, Page(s) 901–902

    Language English
    Publishing date 2020-10-21
    Publishing country Germany
    Document type Published Erratum
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-021-03986-x
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  5. Article ; Online: Results after arthroscopic treatment of iliopsoas impingement after total hip arthroplasty.

    Zimmerer, A / Hauschild, M / Nietschke, R / Schneider, M M / Wassilew, G / Sobau, C / Miehlke, W

    Archives of orthopaedic and trauma surgery

    2020  Volume 142, Issue 2, Page(s) 189–195

    Abstract: Background: A cause of groin pain after total hip arthroplasty (THA) is mechanical irritation or impingement of the iliopsoas tendon. The incidence is about 4%. If conservative therapy fails, an arthroscopic release of the iliopsoas tendon can be ... ...

    Abstract Background: A cause of groin pain after total hip arthroplasty (THA) is mechanical irritation or impingement of the iliopsoas tendon. The incidence is about 4%. If conservative therapy fails, an arthroscopic release of the iliopsoas tendon can be performed. The aim of the study was to assess the mid-term clinical outcome after arthroscopic release. We hypothesize that good results can be achieved by a minimally invasive endoscopic procedure.
    Methods: Using our in-house database, all patients who received an endoscopic release of the iliopsoas tendon due to mechanical irritation after THA were identified. Inclusion criteria were mechanical irritation of the iliopsoas tendon after cementless THA with minimal acetabular component prominence. Exclusion criteria were marked prominence of the acetabular component and groin pain after THA for any other reason. In these patients, the modified Harris Hip Score (mHHS), the pain level using the numerical analogue scale and the UCLA Activity Score were measured. The mean follow-up period was 7 ± 3.8 (2.6-11.7) years.
    Results: 25 patients were identified in whom an arthroscopic release of the iliopsoas tendon had been performed since 2007. The data of 20 patients were available at follow-up. The gender ratio was 1:1, the average age at the time of arthroscopy was 59 ± 27.7 (52-78) years. The average interval between THA and arthroscopy was 6.3 ± 4.0 (1.7-15) years. The mHHS showed a significant improvement from preoperative 31.2 ± 9.8 (17.6-47.3) to 82.0 ± 9.8 (46.2-100) points (p = 0.001). The pain level on the NAS decreased significantly from 8.5 ± 1.2 (7-10) to 2.5 ± 1.8 (0-6) points (p = 0.001). The activity level based on the UCLA Activity Score raised from 4.0 ± 2.7 (0-7) to 6.5 ± 1.8 (3-9) (p = 0.09).
    Conclusion: Mechanical irritation and impingement of the iliopsoas tendon is an important diagnosis to be considered in persistent groin pain after total hip arthroplasty. In failure of non-operative treatment, good clinical results can be achieved with arthroscopic release and the pain level can be significantly reduced.
    Level of evidence: IV.
    MeSH term(s) Arthroplasty, Replacement, Hip/adverse effects ; Arthroscopy ; Femoracetabular Impingement/etiology ; Femoracetabular Impingement/surgery ; Hip/surgery ; Hip Joint/surgery ; Humans ; Psoas Muscles/surgery ; Retrospective Studies ; Treatment Outcome
    Language English
    Publishing date 2020-10-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-020-03623-z
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  6. Article: Reasons for surgical revision after conservatively treated radial head fractures-retrospective study of 70 patients.

    Nietschke, R / Burkhart, K J / Hollinger, B / Dehlinger, F I / Zimmerer, A / Schneider, M M

    Obere extremitat

    2018  Volume 13, Issue 2, Page(s) 112–120

    Abstract: Background: An inadequate clinical outcome after conservatively treated radial head fractures is not uncommon. We analyzed the subjective limitations, objective complaints, and surgical procedures for radial head fractures initially treated ... ...

    Abstract Background: An inadequate clinical outcome after conservatively treated radial head fractures is not uncommon. We analyzed the subjective limitations, objective complaints, and surgical procedures for radial head fractures initially treated conservatively.
    Patients and method: Between 2007 and 2016, 70 patients (42 men, 28 women) who suffered from fracture sequelae after conservatively treated radial head fractures were examined. Demographic (age, 41.8 years, range, 16-75 years) and clinical data (pain, range of motion, instability) were retrospectively evaluated.
    Results: The average time to surgery after trauma was 50 months (range, 5-360 months). In 38 cases, radial head fractures were initially treated with immobilization for 3.4 weeks (range, 1-8 weeks). Physiotherapeutic treatment was performed in 39 cases. In only half of the cases was retrospective Mason classification possible: 20 type I, 8 type II, 5 type III, and 2 type IV. Of the 70 patients, 53 had posttraumatic elbow stiffness; 34 had isolated lateral and four patients isolated medial ligament instability. There were eight cases with a combination of lateral and medial ligament instability and 27 cases of elbow stiffness combined with instability. An average of 1.2 (range, 1-4) surgical procedures per patient were performed. In all, 64 patients underwent elbow arthroscopy with arthrolysis and additional treatment depending on other injuries. The range of motion improved on average from preoperative flexion/extension of 131-15-0° to postoperative flexion/extension of 135-5-0° (gain in flexion: 4.2° and extension: 10.6°).
    Conclusion: Conservative treatment of radial head fractures does not always yield good results. Reasons for a poor outcome include chronic instability, cartilage damage, stiffness, or a combination thereof. Improved outcomes can be achieved via arthroscopic arthrolysis.
    Language English
    Publishing date 2018-05-15
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2277569-9
    ISSN 1862-6602 ; 1862-6599
    ISSN (online) 1862-6602
    ISSN 1862-6599
    DOI 10.1007/s11678-018-0456-2
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  7. Article: Lateral Ulnar Collateral Ligament Reconstruction for Posterolateral Rotatory Instability After Failed Common Extensor Origin Release: Outcomes at Minimum 2-Year Follow-up.

    Schneider, Marco M / Müller, Konstantin / Hollinger, Boris / Nietschke, Rainer / Zimmerer, Alexander / Ries, Christian / Burkhart, Klaus J

    Orthopaedic journal of sports medicine

    2022  Volume 10, Issue 2, Page(s) 23259671211069340

    Abstract: Background: In patients with chronic lateral epicondylitis who have failed nonoperative treatment, open or percutaneous release of the common extensor origin (CEO) without subsequent reconstruction tends to result in good clinical outcomes. However, ... ...

    Abstract Background: In patients with chronic lateral epicondylitis who have failed nonoperative treatment, open or percutaneous release of the common extensor origin (CEO) without subsequent reconstruction tends to result in good clinical outcomes. However, surgery can lead to iatrogenic injuries of the lateral collateral ligamentous complex, causing posterolateral rotatory instability (PLRI).
    Purpose: To determine the clinical outcomes of lateral ulnar collateral ligament (LUCL) reconstruction using a triceps tendon graft after failed open CEO surgery.
    Study design: Case series; Level of evidence, 4.
    Methods: A total of 103, patients underwent revision surgery at a single institution because of PLRI after failed open release of the CEO (Hohmann procedure) between January 2007 and October 2016. The primary surgery had been performed at other institutions in all cases. Of these patients, 72 were available for follow-up (49 by clinical examination, 23 by telephone interview). Standardized clinical examination; Mayo Elbow Performance Score (MEPS); 11-item version of the Disabilities of the Arm, Shoulder and Hand Score (QuickDASH); subjective elbow value (SEV); and patient satisfaction were assessed at least 2 years after LUCL reconstruction.
    Results: The mean age of patients in the study was 46.9 years (range, 21-74 years), and the mean follow-up was 2.8 years after revision surgery. The mean MEPS was 78.9, and the mean QuickDASH score reached 20.4. The mean SEV was 78.6%, and 75% of the patients rated the surgery as good to excellent. Complications were detected in 14% of the patients, and 9 needed revision surgery, primarily owing to graft failure with recurrent instability (n = 5).
    Conclusion: LUCL reconstruction in patients with PLRI after release of the CEO can restore elbow stability and achieve high patient satisfaction. However, outcome scores and revision rates in this cohort were inferior to published outcomes of primary LUCL reconstruction for treatment of noniatrogenic or traumatic PLRI.
    Language English
    Publishing date 2022-02-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2706251-X
    ISSN 2325-9671
    ISSN 2325-9671
    DOI 10.1177/23259671211069340
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  8. Article ; Online: Destruktion des Radiuskopfes : Endoprothese, autologer Aufbau oder Anconeusplastik?

    Burkhart, K J / Gohlke, F / Nietschke, R / Schneider, M M / Hollinger, B

    Der Orthopade

    2017  Volume 46, Issue 12, Page(s) 981–989

    Abstract: Background: Radiocapitellar arthritis or defects most often result from trauma. Most of the patients are young and have high functional demands with high load capacities. Therefore, endoprosthetic options should be postponed for as long as possible. If ... ...

    Title translation Destruction of the radial head : Endoprosthesis, autologous reconstruction or anconeus arthroplasty?
    Abstract Background: Radiocapitellar arthritis or defects most often result from trauma. Most of the patients are young and have high functional demands with high load capacities. Therefore, endoprosthetic options should be postponed for as long as possible. If conservative treatment cannot relieve symptoms sufficiently, radial head preservation, resection or replacement options are at the surgeon's disposal. In early stages of radiocapitellar arthritis, radial head preservation options can be taken into account. The chances ofgood results decrease with increasing cartilage damage.
    Treatment options: In addition to radial head preservation options this article discusses radial head resection with and without anconeus interposition and radial head as well as radiocapitellar replacement. Clinical data are rare. The advantages and disadvantages of each option must be discussed with the patient and the decision should be made individually on the basis of patient specific factors. The aim must be to postpone endoprosthetic options - especially total elbow arthroplasty - for as long as possible, while assuring a functional range of motion with an acceptable pain level.
    MeSH term(s) Arthroplasty/methods ; Arthroplasty, Replacement, Elbow/methods ; Arthroscopy ; Cartilage, Articular/diagnostic imaging ; Cartilage, Articular/injuries ; Cartilage, Articular/surgery ; Elbow Joint/diagnostic imaging ; Elbow Joint/injuries ; Elbow Joint/surgery ; Joint Loose Bodies/diagnostic imaging ; Joint Loose Bodies/surgery ; Muscle, Skeletal/surgery ; Osteoarthritis/diagnostic imaging ; Osteoarthritis/surgery ; Osteophyte/diagnostic imaging ; Osteophyte/surgery ; Postoperative Complications/diagnostic imaging ; Postoperative Complications/etiology ; Postoperative Complications/surgery ; Prosthesis Design ; Prosthesis Failure ; Radius/diagnostic imaging ; Radius/surgery ; Radius Fractures/diagnostic imaging ; Radius Fractures/surgery ; Range of Motion, Articular/physiology ; Reoperation ; Tomography, X-Ray Computed
    Language German
    Publishing date 2017-10-22
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 121792-6
    ISSN 1433-0431 ; 0085-4530
    ISSN (online) 1433-0431
    ISSN 0085-4530
    DOI 10.1007/s00132-017-3492-5
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  9. Conference proceedings: Schlafqualität und Nachtschmerz bei Patienten mit Ellenbogenerkrankungen

    Nietschke, Rainer / Zimmerer, Alexander / Schoch, Christian / Burkhart, Klaus J. / Kimmeyer, Michael / Schneider, Marco M.

    2022  , Page(s) AB68–861

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2022); Berlin; ; Berufsverband für Orthopädie und Unfallchirurgie; 2022
    Keywords Medizin, Gesundheit ; Tennisellenbogen ; Schlafstörungen ; Ellenbogenschmerzen ; Nachtschmerzen ; DASH
    Publishing date 2022-10-25
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/22dkou543
    Database German Medical Science

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  10. Article: Chronische mediale Ellenbogeninstabilität - aktuelle Datenlage. Chronic medial elbow instability - status quo

    Burkhart, K. J. / Schneider, M. M. / Hackl, M. / Nietschke, R. / Müller, L. P. / Hollinger, B.

    Obere Extremität

    2019  Volume 14, Issue 1, Page(s) 33

    Language German
    Document type Article
    ZDB-ID 2277569-9
    ISSN 1862-6599
    Database Current Contents Medicine

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