Changes

Also, unless you know the referring physician is familiar with the same angle terminology, preferably report any deviating angles as varus/valgus deviation or ventral/dorsal angulation of either, such as:*The An abnormally increased valgus angulation of __° of the femur component in relation to femoral diaphysis.*The A abnormal ventral angulation of __° of the tibial diaphysis in relation to the tibial component.

[[File:Knee prosthesis zones by Knee Society 2015, lateral view.jpg|thumb|150px|KS (Knee Society) zones, for localizing radiolucent zones or other focal changes.<ref name="MeneghiniMont2015">{{cite journal|last1=Meneghini|first1=R. Michael|last2=Mont|first2=Michael A.|last3=Backstein|first3=David B.|last4=Bourne|first4=Robert B.|last5=Dennis|first5=Doug A.|last6=Scuderi|first6=Giles R.|title=Development of a Modern Knee Society Radiographic Evaluation System and Methodology for Total Knee Arthroplasty|journal=The Journal of Arthroplasty|volume=30|issue=12|year=2015|pages=2311–2314|issn=08835403|doi=10.1016/j.arth.2015.05.049}}</ref>]][[File:Knee prosthesis zones by Knee Society 2015, AP view.jpg|thumb|180px|KS zones, AP view.<ref name="MeneghiniMont2015"/>]]Radiolucent lines may indicate loosening of the implant. A radiolucent line thinner than than 2 mm can be tolerated at the cement-bone interface (for cemented implants) or implant-bone interface (for cementless implants) if it remains stable and appears within the first 6 months (cemented implants) or the first 2 years (cementless implants) after surgery.<ref name="Cyteval2016">{{cite journal|last1=Cyteval|first1=C.|title=Imaging of knee implants and related complications|journal=Diagnostic and Interventional Imaging|volume=97|issue=7-8|year=2016|pages=809–821|issn=22115684|doi=10.1016/j.diii.2016.02.015}}</ref> There are various classification systems for specifying the location of radiolucent spaces,<ref name="NapierO’Neill2018">{{cite journal|last1=Napier|first1=Richard J.|last2=O’Neill|first2=Christopher|last3=O’Brien|first3=Seamus|last4=Doran|first4=Emer|last5=Mockford|first5=Brian|last6=Boldt|first6=Jens|last7=Beverland|first7=David E.|title=A prospective evaluation of a largely cementless total knee arthroplasty cohort without patellar resurfacing: 10-year outcomes and survivorship|journal=BMC Musculoskeletal Disorders|volume=19|issue=1|year=2018|issn=1471-2474|doi=10.1186/s12891-018-2128-1}}</ref><ref name="KumarYadav2014">{{cite journal|last1=Kumar|first1=Nishikant|last2=Yadav|first2=Chandrashekhar|last3=Raj|first3=Rishi|last4=Anand|first4=Sumit|title=How to Interpret Postoperative X-rays after Total Knee Arthroplasty|journal=Orthopaedic Surgery|volume=6|issue=3|year=2014|pages=179–186|issn=17577853|doi=10.1111/os.12123}}</ref> including by KS (Knee Society) zones published in 2015.<ref name="MeneghiniMont2015"/>