ZusammenfassungDie Arbeitsgemeinschaft „Klinische Geweberegeneration“ hat bereits in den Jahren 2004, 2013 und 2016 Empfehlungen in Bezug auf die Indikation für verschiedene knorpelregenerative Verfahren zur Behandlung von Knorpelschäden am Kniegelenk publiziert. Auf Basis neuer wissenschaftlicher Erkenntnisse sollen in der vorliegenden Arbeit diese Empfehlungen auch unter Einbeziehung neuer Behandlungsverfahren aktualisiert werden. Die Einschätzung folgt damit dem Prinzip der besten verfügbaren Evidenz und berücksichtigt über prospektiv randomisierte Studien hinaus auch Studien mit niedrigerem Evidenzniveau. An Stellen fehlender publizierter Evidenz basiert die Entscheidung hier auf einem Konsensusprozess innerhalb der Mitglieder der AG Klinische Geweberegeneration.Das Prinzip der bereits vorausgehend publizierten Arbeiten bleibt auch in den neuen Empfehlungen erhalten. Kleine Knorpelschäden sind nach Ansicht der Arbeitsgruppe für eine Knochenmarkstimulation zugänglich, die matrixassoziierte autologe Chondrozytentransplantation (mACT) ist für größere Knorpelschäden die Methode der Wahl. Auf Basis neuerer Daten wird jedoch die Indikationsgrenze für die mACT auf 2,0 cm2 reduziert. Zusätzlich zur arthroskopischen Mikrofrakturierung wird auch die matrixaugmentierte Knochenmarkstimulation in die Empfehlung als Standardverfahren aufgenommen (empfohlene Defektgröße 1–4,5 cm2). Für die Therapie kleinerer osteochondraler Defekte wird neben der osteochondralen Transplantation (OCT) auch die matrixaugmentierte Knochenmarkstimulation empfohlen. Bei größeren Defekten eignet sich die autologe Knorpelzelltransplantation (mACT) in Kombination mit einer Rekonstruktion des subchondralen Knochens.

Introduction The treatment of severe acetabular bone loss remains a difficult challenge. No classification system is available that combines intuitive use, structured design and offers a therapeutic recommendation according to the current literature and modern state of the art treatment options. The goal of this study is to introduce an intuitive, reproducible and reliable guideline for the evaluation and treatment of acetabular defects. Methods The proposed Acetabular Defect Classification (ADC) is based on the integrity of the acetabular rim and supporting structures. It consists of 4 main types of defects ascending in severity and subdivisions narrowing down-defect location. Type 1 presents an intact acetabular rim, type 2 includes a noncontained defect of the acetabular rim ≤ 10 mm, in type 3 the rim defect exceeds 10 mm and type 4 includes different kinds of pelvic discontinuity. A collective of 207 preoperative radiographs were graded according to ADC and correlated with intraoperative findings. Additionally, a randomized sample of 80 patients was graded according to ADC by 5 observers to account for inter-and intra-rater reliability. Results We evaluated the agreement of preoperative, radiographic grading and intraoperative findings presenting with a k value of 0.74. Interobserver agreement presented with a k value of 0.62 and intraobserver at a k value of 0.78. Conclusion The ADC offers an intuitive, reliable and reproducible classification system. It guides the surgeon pre-and intraoperatively through a complex field of practice.

Spondylodiscitis is an infection of the intervertebral disc with subsequent infection of the adjacent vertebral bodies. The main causes are 3 pathogen groups: bacteria, particularly tuberculosis pathogens, fungi and parasites. In pyogenic spondylodiscitis, infections with Staphylococcus aureus are the most common, with an incidence of up to 80%. Mortality is around 2 - 3%. Infections with tuberculosis are often associated with psoas and paravertebral abscesses. Neurological deficits are registered in up to 50% of patients. For microbiological diagnostic testing, blood cultures are used for aerobic and anaerobic bacteria. However, histological examination leads significantly more frequently to positive pathogen detection. In tissue samples, results with 16S rRNA PCR results are clearly superior to results from microbiological examination. The MRI exhibits high sensitivity and specificity and is therefore superior to other radiological methods. Elimination of the infection, pain reduction and stabilisation of the spine are the main objectives of any treatment. A standardised antibiotic therapy for spondylodiscitis has not been clearly defined. Pathogen detection is important, with focused antibiotic therapy. Antibiotic therapy should initially be administered intravenously for 2 - 4 weeks. This should be followed by oral administration for 6 - 12 weeks. In the case of antibiotic-resistant infections with neurological deficiencies, it is recommended to perform a surgical procedure, with careful debridement and instrumentation as well as i. v. administered antibiotics for 3 weeks followed by three month oral antibiotic treatment. Surgical procedures are indicated with neurological deficits, progressive increase in spinal deformities, failure of conservative therapy with insufficient pain relief and unreliable pathogen identification. The selection of the surgical procedure should mainly be based on the extent and localisation of bone destruction and the individual circumstances of the patients. The prognosis is good if there is a clear reduction in CRP and ESR in the first few weeks.

An exact reproduction of the traumatic event enables a distinction between high and low energy trauma groups to be made. In previous studies traffic accidents were recorded as one group, so an influence of the increasing kinematic energy could not be assessed. The accident kinematics can be taken into account by differentiating between high and low-energy trauma groups. In high-energy accidents the TH7 and TH10 vertebrae were found to be at risk vertebrae. In addition to the force direction, the force strength also has a decisive influence on the distribution pattern of VBF.

The present basic clinical examination methods allow a structured approach to clinical issues and can be a good basis, if supplemented by further specific and individual tests.