caa a22 4500 605459029 CHVBK 20210128100232.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00167-014-2887-7 doi (NATIONALLICENCE)springer-10.1007/s00167-014-2887-7 Oohashi Yoshikazu Oohashi Orthopaedic Clinic, 38-20, Ninomiya-3-choume, 910-0015, Fukui City, Fukui-Ken, Japan aut Developmental anomaly of ossification type patella partita [Elektronische Daten] [Yoshikazu Oohashi] Purpose: Bipartite patella has been recognized as an incidental radiographic finding. However, symptomatic bipartite patella is occasionally diagnosed in adolescents and young athletes. The incidence of bipartite patella has been reported at 0.2-1.7, and 1-2% of these cases are symptomatic. The purpose of this review article was to discuss current concepts relevant to developmental anomaly of ossification type patella partita. Methods: A PubMed database search using the key words "bipartite patella” was performed. Clinical papers reporting the bipartite patella were included. Four German-language studies were also included, three for incidence of bipartite patella and one for classification. Results: A new classification of developmental anomaly of ossification type patella partita based on location and number of fragment was recently proposed. It is simple and useful and applicable to all types of bipartite or tripartite patella. Several imaging studies have reportedly been used to evaluate symptomatic bipartite patella. MRI is currently the most appropriate method used to assess patients with bipartite patella. Although surgical procedures have been developed that reduce excessive traction force by the vastus lateralis muscle on the bipartite fragment, there is not sufficient evidence to support their use for routine treatment of painful bipartite patella. Conclusion: In most symptomatic cases, movement at the interface between the bipartite fragment and the body of the patella presumably causes the pain. Therefore, the existence of apparent motion at the interface should be confirmed by specific imaging studies before surgery. Magnetic resonance imaging findings may provide such evidence by demonstrating a fluid bright signal across the segmentation, typical of pseudoarthrosis. Level of evidence: V. Springer-Verlag Berlin Heidelberg, 2014 Patella partita nationallicence Bipartite patella nationallicence Developmental anomaly of ossification type nationallicence Current concepts nationallicence Review nationallicence Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 1071-1076 0942-2056 23:4<1071 2015 23 167 https://doi.org/10.1007/s00167-014-2887-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 review-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-2887-7 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Oohashi Yoshikazu Oohashi Orthopaedic Clinic, 38-20, Ninomiya-3-choume, 910-0015, Fukui City, Fukui-Ken, Japan aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 1071-1076 0942-2056 23:4<1071 2015 23 167