O Riaz1, A Aqil2, G Sisodia2, G Chakrabarty2. 1. The West Riding Knee Unit, Huddersfield Royal Infirmary, Calderdale and Huddersfield Foundation NHS Trust, Huddersfield, HD3 3EA, UK. osmanriaz@doctors.org.uk. 2. The West Riding Knee Unit, Huddersfield Royal Infirmary, Calderdale and Huddersfield Foundation NHS Trust, Huddersfield, HD3 3EA, UK.
Abstract
AIMS: To prospectively compare long-term clinical and radiological outcomes following a cruciate retaining fixed-bearing (FB) and a mobile-bearing (MB) primary total knee replacement (TKR). METHODS: We prospectively reviewed 113 TKRs in 99 patients (14 bilateral) with a PFC sigma cruciate retaining rotating platform system, at an average follow-up of 11.1 years (range 10-12). Results were contrasted with those from 89 TKRs in 72 patients (17 bilateral) with a PFC sigma cruciate fixed-bearing prosthesis, at an average follow-up of 12.1 years (range 10-14.1). Outcomes collected included pre- and post-operative range of motion, Oxford Knee Scores, complications encountered, as well as radiographical assessments of polyethylene wear. RESULTS: In the MB group, mean Oxford Knee Scores improved from 16 pre-operatively to 42 at final follow-up. The mean range of motion was 115° (75-130). In the FB group, mean Oxford Knee Scores improved from 16.2 pre-operatively to 42.5 at final follow-up. The mean range of motion was 111.2 (80-135) degrees at final follow-up. CONCLUSION: We failed to elicit an objectively demonstrable clinical difference between the MB- and FB-implanted knees. Similarly, radiological benefits of the MB implants with regard to polyethylene wear were not evident at a minimum 10-year follow-up.
AIMS: To prospectively compare long-term clinical and radiological outcomes following a cruciate retaining fixed-bearing (FB) and a mobile-bearing (MB) primary total knee replacement (TKR). METHODS: We prospectively reviewed 113 TKRs in 99 patients (14 bilateral) with a PFC sigma cruciate retaining rotating platform system, at an average follow-up of 11.1 years (range 10-12). Results were contrasted with those from 89 TKRs in 72 patients (17 bilateral) with a PFC sigma cruciate fixed-bearing prosthesis, at an average follow-up of 12.1 years (range 10-14.1). Outcomes collected included pre- and post-operative range of motion, Oxford Knee Scores, complications encountered, as well as radiographical assessments of polyethylene wear. RESULTS: In the MB group, mean Oxford Knee Scores improved from 16 pre-operatively to 42 at final follow-up. The mean range of motion was 115° (75-130). In the FB group, mean Oxford Knee Scores improved from 16.2 pre-operatively to 42.5 at final follow-up. The mean range of motion was 111.2 (80-135) degrees at final follow-up. CONCLUSION: We failed to elicit an objectively demonstrable clinical difference between the MB- and FB-implanted knees. Similarly, radiological benefits of the MB implants with regard to polyethylene wear were not evident at a minimum 10-year follow-up.
Entities:
Keywords:
Fixed-bearing; Long-term outcome; Mobile-bearing; Total knee replacement
Authors: A J Price; J L Rees; D Beard; E Juszczak; S Carter; S White; R de Steiger; C A F Dodd; M Gibbons; P McLardy-Smith; J W Goodfellow; D W Murray Journal: J Bone Joint Surg Br Date: 2003-01
Authors: Cameron J Killen; Michael P Murphy; William J Hopkinson; Melvyn A Harrington; William H Adams; Harold W Rees Journal: J Clin Orthop Trauma Date: 2019-03-29