{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T00:38:18Z","timestamp":1789519098928,"version":"build-2803163510"},"reference-count":48,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T00:00:00Z","timestamp":1611878400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T00:00:00Z","timestamp":1611878400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T00:00:00Z","timestamp":1611878400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2022,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To evaluate the relationship between posterior tibial slope (PTS), posterior condylar offset (PCO), femoral sagittal angle (FSA) on clinical outcomes, and propose optimal sagittal plane alignments for unicompartmental knee arthroplasty (UKA).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Prospectively collected data of 265\u00a0medial UKA was analysed. PTS, PCO, FSA were measured on preoperative and postoperative lateral radiographs. Clinical assessment was done at 6\u2010month, 2\u2010year and 10\u2010year using Oxford Knee Score, Knee Society Knee and Function scores, Short Form\u201036, range of motion (ROM), fulfilment of satisfaction and expectations. Implant survivorship was noted at mean 15\u2010year. Kendall rank correlation test evaluated correlations of sagittal parameters against clinical outcomes. Multivariable linear regression evaluated predictors of postoperative ROM. Effect plots and interaction plots were used to identify angles with the best outcomes. (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) was the threshold for statistical significance.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There were significant correlations between PTS, PCO and FSA. Younger age, lower BMI, implant type, greater preoperative flexion, steeper PTS and preservation of PCO were significant predictors of greater postoperative flexion. There were significant interaction effects between PTS and PCO. Effect plots demonstrate a PTS between 2\u00b0 to 8\u00b0 and restoration of PCO within 1.5\u00a0mm of native values are optimal for better postoperative flexion. Interaction plot reveals that it is preferable to reduce PCO by 1.0\u00a0mm when PTS is 2\u00b0 and restore PCO at 0\u00a0mm when PTS is 8\u00b0.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>UKA surgeons and future studies should be mindful of the relationship between PTS, PCO and FSA, and avoid considering them in isolation. When deciding on the method of balancing component gaps in UKA, surgeons should rely on the PTS. Decrease the posterior condylar cut when PTS is steep, and increase the posterior condylar cut when PTS is shallow. The acceptable range for PTS is between 2\u00b0 to 8\u00b0 and PCO should be restored to 1.5\u00a0mm of native values.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>II.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-021-06453-7","type":"journal-article","created":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T04:42:05Z","timestamp":1611895325000},"page":"822-831","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Posterior condylar offset and posterior tibial slope targets to optimize knee flexion after unicompartmental knee arthroplasty"],"prefix":"10.1002","volume":"30","author":[{"given":"Yong Zhi","family":"Khow","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4496-8035","authenticated-orcid":false,"given":"Ming Han Lincoln","family":"Liow","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Merrill","family":"Lee","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jerry Yongqiang","family":"Chen","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ngai Nung","family":"Lo","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seng Jin","family":"Yeo","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Singapore General Hospital 20 College Road, Academia, Level 4 169856 Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,1,29]]},"reference":[{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/2309499019836286"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2007.03.020"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198264090-00008"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.15.00664"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000187062.65691.e3"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-009-1119-9"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-014-3361-2"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.5792\/ksrr.17.042"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-7580.2012.01563.x"},{"key":"e_1_2_9_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2019.05.006"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2017.05.002"},{"key":"e_1_2_9_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2018.02.001"},{"key":"e_1_2_9_14_2","doi-asserted-by":"publisher","DOI":"10.1080\/17453674.2018.1542214"},{"key":"e_1_2_9_15_2","doi-asserted-by":"publisher","DOI":"10.1080\/17453674.2016.1274592"},{"key":"e_1_2_9_16_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-198911000-00004"},{"key":"e_1_2_9_17_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-0039-1678539"},{"key":"e_1_2_9_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2015.12.029"},{"key":"e_1_2_9_19_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-010-1063-y"},{"key":"e_1_2_9_20_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.19.01277"},{"key":"e_1_2_9_21_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198971010-00023"},{"key":"e_1_2_9_22_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2009.07.005"},{"key":"e_1_2_9_23_2","doi-asserted-by":"publisher","DOI":"10.1054\/arth.2002.32688"},{"key":"e_1_2_9_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2016.02.005"},{"key":"e_1_2_9_25_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.96B7.33352"},{"key":"e_1_2_9_26_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2015.05.009"},{"key":"e_1_2_9_27_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-0038-1669448"},{"key":"e_1_2_9_28_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-008-0712-x"},{"key":"e_1_2_9_29_2","doi-asserted-by":"publisher","DOI":"10.1054\/arth.2003.50046"},{"key":"e_1_2_9_30_2","doi-asserted-by":"publisher","DOI":"10.1097\/00004356-200109000-00004"},{"key":"e_1_2_9_31_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.89B8.19424"},{"key":"e_1_2_9_32_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0225941"},{"key":"e_1_2_9_33_2","doi-asserted-by":"publisher","DOI":"10.3233\/BME-191042"},{"key":"e_1_2_9_34_2","doi-asserted-by":"publisher","DOI":"10.1590\/1413-785220202802225137"},{"key":"e_1_2_9_35_2","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/kwq433"},{"key":"e_1_2_9_36_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200307000-00014"},{"key":"e_1_2_9_37_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.84B5.0840653"},{"key":"e_1_2_9_38_2","doi-asserted-by":"publisher","DOI":"10.1302\/2046-3758.83.BJR-2018-0208.R2"},{"key":"e_1_2_9_39_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2013.01.004"},{"key":"e_1_2_9_40_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2019.07.010"},{"key":"e_1_2_9_41_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2016.01.003"},{"key":"e_1_2_9_42_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2018.05.014"},{"key":"e_1_2_9_43_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2010.02.011"},{"key":"e_1_2_9_44_2","first-page":"As264","article-title":"Comparison of methods for the scoring and statistical analysis of SF\u201036 health profile and summary measures: summary of results from the Medical Outcomes Study","volume":"33","author":"Ware JE","year":"1995","journal-title":"Med Care"},{"key":"e_1_2_9_45_2","unstructured":"WealeAE HalabiOA JonesPW WhiteSHPerceptions of outcomes after unicompartmental and total knee replacements.Clin Orthop Relat Res(2001)10.1097\/00003086\u2010200101000\u201000021143\u201015311153983"},{"key":"e_1_2_9_46_2","doi-asserted-by":"publisher","DOI":"10.1155\/2015\/736826"},{"key":"e_1_2_9_47_2","doi-asserted-by":"publisher","DOI":"10.1155\/2018\/8743604"},{"key":"e_1_2_9_48_2","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2013.281053"},{"key":"e_1_2_9_49_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.101B2.BJJ-2018-0969.R2"}],"container-title":["Knee Surgery, Sports Traumatology, Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00167-021-06453-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00167-021-06453-7\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00167-021-06453-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"},{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1007\/s00167-021-06453-7","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T08:46:55Z","timestamp":1760863615000},"score":1,"resource":{"primary":{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/10.1007\/s00167-021-06453-7"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,29]]},"references-count":48,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2022,3]]}},"alternative-id":["10.1007\/s00167-021-06453-7"],"URL":"https:\/\/doi.org\/10.1007\/s00167-021-06453-7","archive":["Portico"],"relation":{},"ISSN":["0942-2056","1433-7347"],"issn-type":[{"value":"0942-2056","type":"print"},{"value":"1433-7347","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,29]]},"assertion":[{"value":"8 October 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"11 January 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"29 January 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"All authors declare that they have no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"Yes.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}