@phdthesis{Anderson2013,
  author    = {Anderson, Philip},
  title     = {Aussagekraft des Instability Severity Index Scores als prognostischer Parameter f{\"u}r den Erfolg der arthroskopischen und offenen modifizierten Bankart-Operation mit Kapselshift : eine retrospektive klinische Untersuchung},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-90757},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2013},
  abstract  = {Im Rahmen der vorliegenden Studie wurde an 220 Patienten, die zwischen 1988 und 2007 im K{\"o}nig-Ludwig-Haus in W{\"u}rzburg durch einen Operateur wegen rezidivierender, {\"u}berwiegend posttraumatischer ventraler Schulterinstabilit{\"a}t offen oder arthroskopisch mittels (modifizierter) Bankart-Prozedur operiert wurden, der „Instability Severity Index Score (ISIS)" so erhoben, wie er aus den pr{\"a}operativen Unterlagen zu ermitteln war. Alle Patienten wurden nach postoperativen Rezidivluxationen befragt und die Schulterfunktion wurde mittels standardisiertem und validiertem Fragebogen durch den „Constant Score" und den „Oxford Shoulder Instability Score" untersucht. Ziel der Studie war es, den von Balg und Boileau 2007 vorgestellten „Instability Severity Index Score" (ISIS) auf seine Aussagekraft hin am vorliegenden Kollektiv zu {\"u}berpr{\"u}fen. Zeitgleich sollten ein Vergleich der offenen mit den arthroskopischen Stabilisierungen sowie eine Analyse der Ursachen der Rezidivluxationen erfolgen. Insgesamt kam es in acht F{\"a}llen zu Rezidivluxationen (3,6 \%). Die offen Operierten wiesen eine Rate von 3,1 \%, die Gruppe der arthroskopisch Operierten 8,7 \% Rezidive auf. Patienten mit weniger oder gleich sechs Punkten im ISIS hatten in 2,7 \% Reluxationen, Patienten mit mehr als sechs Punkten in 8,1 \%. Patienten, die r{\"u}ckblickend gem{\"a}ß der Empfehlung aus dem ISIS operiert wurden, hatten in 5,3 \% Rezidivluxationen. Patienten, die entgegen der Empfehlung operiert wurden, in 3,5 \%. Alle Unterschiede waren statistisch nicht signifikant. In allen Gruppen konnten in den funktionellen Scores sehr gute Ergebnisse mit durchschnittlich {\"u}ber 87 \% im alters- und geschlechtsadaptierten Constant Score und {\"u}ber 42 Punkten im Oxford Shoulder Instability Score ohne signifikante Unterschiede erzielt werden. Von den insgesamt acht Patienten mit Reluxationen lagen von zwei Patienten CT-Untersuchungen nach aufgetretener Reluxation vor. In beiden F{\"a}llen konnten signifikante Glenoidranddefekte gefunden werden. Aus Sicht der erhobenen Daten und der erzielten Ergebnisse ist der ISIS als n{\"u}tzlich zur pr{\"a}operativen Risikobewertung sowie zur Entscheidung {\"u}ber das operative Vorgehen einzusch{\"a}tzen, wobei er keine imperative Handlungsanweisung darstellen sollte. Die Empfehlung zum Korakoidtransfer nach Latarjet ab sieben Punkten im ISIS kann anhand dieser Daten nicht best{\"a}tigt werden. Vielmehr konnte gezeigt werden, dass eine offene Bankart-Operation mit selektivem Kapselshift sehr gute Langzeitergebnisse bez{\"u}glich der Reluxationsraten und der funktionellen Ergebnisse liefert. Im Hinblick auf die erzielten Ergebnisse und Fehleranalysen ist weiterhin festzuhalten, dass bei Verdacht auf einen Glenoiddefekt in der Regel eine CT mit 3D-Rekonstruktion und Seiten-vergleich erfolgen sollte, um die Indikation zum offenen Knochenblocktransfer nicht zu verpassen. Offene und arthroskopische Stabilisierungen k{\"o}nnen bei richtiger Indikationsstellung kurz- und mittelfristig vergleichbar gute Ergebnisse liefern. Langfristig aber scheint das minimal-invasive Vorgehen h{\"o}here Raten an Rezidivluxationen aufzuweisen. Wie auch in dieser Arbeit gezeigt werden konnte, ist ein langer Beobachtungszeitraum bei Studien, die das klinische Ergebnis von Schulterstabilisierungen untersuchen, sehr wichtig, um das wahre Ausmaß an postoperativen Rezidivinstabilit{\"a}ten zu erfassen.},
  subject      = {Schultergelenkverletzung},
  language  = {de}
}
@article{RakKlannHeinzetal.2023,
  author    = {Rak, Dominik and Klann, Lukas and Heinz, Tizian and Anderson, Philip and Stratos, Ioannis and Nedopil, Alexander J. and Rudert, Maximilian},
  title     = {Influence of mechanical alignment on functional knee phenotypes and clinical outcomes in primary TKA: a 1-year prospective analysis},
  series = {Journal of Personalized Medicine},
  volume    = {13},
  journal   = {Journal of Personalized Medicine},
  number    = {5},
  issn      = {2075-4426},
  doi       = {10.3390/jpm13050778},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-313646},
  year      = {2023},
  abstract  = {In total knee arthroplasty (TKA), functional knee phenotypes are of interest regarding surgical alignment strategies. Functional knee phenotypes were introduced in 2019 and consist of limb, femoral, and tibial phenotypes. The hypothesis of this study was that mechanically aligned (MA) TKA changes preoperative functional phenotypes, which decreases the 1-year Forgotten Joint (FJS) and Oxford Knee Score (OKS) and increases the 1-year WOMAC. All patients included in this study had end-stage osteoarthritis and were treated with a primary MA TKA, which was supervised by four academic knee arthroplasty specialists. To determine the limb, femoral, and tibial phenotype, a long-leg radiograph (LLR) was imaged preoperatively and two to three days after TKA. FJS, OKS, and WOMAC were obtained 1 year after TKA. Patients were categorized using the change in functional limb, femoral, and tibial phenotype measured on LLR, and the scores were compared between the different categories. A complete dataset of preoperative and postoperative scores and radiographic images could be obtained for 59 patients. 42\% of these patients had a change of limb phenotype, 41\% a change of femoral phenotype, and 24\% a change of tibial phenotype of more than ±1 relative to the preoperative phenotype. Patients with more than ±1 change of limb phenotype had significantly lower median FJS (27 points) and OKS (31 points) and higher WOMAC scores (30 points) relative to the 59-, 41-, and 4-point scores of those with a 0 ± 1 change (p < 0.0001 to 0.0048). Patients with a more than ±1 change of femoral phenotype had significantly lower median FJS (28 points) and OKS (32 points) and higher WOMAC scores (24 points) relative to the 69-, 40-, and 8-point scores of those with a 0 ± 1 change (p < 0.0001). A change in tibial phenotype had no effect on the FJS, OKS, and WOMAC scores. Surgeons performing MA TKA could consider limiting coronal alignment corrections of the limb and femoral joint line to within one phenotype to reduce the risk of low patient-reported satisfaction and function at 1-year.},
  language  = {en}
}
@article{HeinzMellerLuetkensetal.2023,
  author    = {Heinz, Tizian and Meller, Felix and Luetkens, Karsten Sebastian and Anderson, Philip Mark and Stratos, Ioannis and Horas, Konstantin and Rudert, Maximilian and Reppenhagen, Stephan and Weißenberger, Manuel},
  title     = {The AMADEUS score is not a sufficient predictor for functional outcome after high tibial osteotomy},
  series = {Journal of Experimental Orthopaedics},
  volume    = {10},
  journal   = {Journal of Experimental Orthopaedics},
  doi       = {10.1186/s40634-023-00575-2},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-357765},
  year      = {2023},
  abstract  = {Purpose The Area Measurement And Depth Underlying Structures (AMADEUS) classification system has been proposed as a valuable tool for magnetic resonance (MR)-based grading of preoperatively encountered chondral defects of the knee joint. However, the potential relationship of this novel score with clinical data was yet to determine. It was the primary intention of this study to assess the correlative relationship of the AMADEUS with patient reported outcome scores in patients undergoing medial open-wedge high tibial valgus osteotomy (HTO). Furthermore, the arthroscopic ICRS (International Cartilage Repair Society) grade evaluation was tested for correlation with the AMADEUS classification system. Methods This retrospective, monocentric study found a total of 70 individuals that were indicated for HTO due to degenerative chondral defects of the medial compartment between 2008 and 2019. A preoperative MR image as well as a pre-osteotomy diagnostic arthroscopy for ICRS grade evaluation was mandatory for all patients. The Knee Osteoarthritis Outcome Score (KOOS) including its five subscale scores (KOOS-ADL, KOOS-QOL, KOOS-Sports, KOOS-Pain, KOOS-Symptoms) was obtained preoperatively and at a mean follow-up of 41.2 ± 26.3 months. Preoperative chondral defects were evaluated using the AMADEUS classification system and the final AMADEUS scores were correlated with the pre- and postoperative KOOS subscale sores. Furthermore, arthroscopic ICRS defect severity was correlated with the AMADEUS classification system. Results There was a statistically significant correlation between the AMADEUS BME (bone marrow edema) subscore and the KOOS Symptoms subscore at the preoperative visit (r = 0.25, p = 0.04). No statistically significant monotonic association between the AMADEUS total score and the AMADEUS grade with pre- and postoperative KOOS subscale scores were found. Intraoperatively obtained ICRS grade did reveal a moderate correlative relation with the AMADEUS total score and the AMADEUS grade (r = 0.28, p = 0.02). Conclusions The novel AMADEUS classification system largely lacks correlative capacity with patient reported outcome measures in patients undergoing HTO. The MR tomographic appearance of bone marrow edema is the only parameter predictive of the clinical outcome at the preoperative visit.},
  language  = {en}
}
@article{HeinzEidmannAndersonetal.2023,
  author    = {Heinz, Tizian and Eidmann, Annette and Anderson, Philip and Weißenberger, Manuel and Jakuscheit, Axel and Rudert, Maximilian and Stratos, Ioannis},
  title     = {Trends in computer-assisted surgery for total knee arthroplasty in Germany: an analysis based on the operative procedure classification system between 2010 to 2021},
  series = {Journal of Clinical Medicine},
  volume    = {12},
  journal   = {Journal of Clinical Medicine},
  number    = {2},
  issn      = {2077-0383},
  doi       = {10.3390/jcm12020549},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-304879},
  year      = {2023},
  abstract  = {Alignment strategies for primary total knee arthroplasty (TKA) have changed significantly over time with a shift towards a more individualized alignment goal. At the same time, computer-assisted surgery (CAS) has gained interest for intraoperative control and accuracy in implant positioning and limb alignment. Despite the often discussed benefits and drawbacks of robotics and navigation for TKA, the routine use of these new devices on a day-to-day basis remains obscure. Therefore, nationwide hospital billing data based on the Operation Procedure Classification System (OPS) were retrieved from the Federal Statistical Office of Germany for the period from 2010 to 2021. OPS codes for primary total knee arthroplasty (OPS code: 5-822*) were further analyzed regarding the usage of computer navigation (additional OPS code: 5-988) or robotic devices (additional OPS code: 5-987). Gender and age at the time of surgery were also assessed. The results show a total of 2,226,559 primary TKAs were implanted between 2010 and 2021, of which 2,044,914 were performed conventionally (91.84\% of all TKAs). A total of 170,276 TKAs were performed using navigation technique (7.65\% of all TKAs) and another 11,369 TKAs were performed using robotics (0.51\% of all TKAs). For the period from 2018 to 2021, a substantial increase in robot-assisted TKA (R-TKA) was observed, with an average increase rate of 84.74\% per year, while the number of navigated TKAs declined (-3.67\% per year). Computer-assisted surgery, and particularly robotics for TKA, are seeing growing popularity and stepwise translation into routine clinical use in Germany, with a steep increase rate of more than 80\% per year since 2018. Nevertheless, the majority of TKAs are still performed using manual instrumentation, rendering conventional TKA the currently unchanged gold standard.},
  language  = {en}
}