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Ho JPY, Cho JH, Nam HS, Park SY, Lee YS. Does referencing system affect the selection of implant size, position and gap balance in total knee arthroplasty? Knee 2023; 45:65-74. [PMID: 37852039 DOI: 10.1016/j.knee.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/24/2023] [Accepted: 10/03/2023] [Indexed: 10/20/2023]
Abstract
BACKGROUND (1) To evaluate if referencing system affects selection of implant size, position, and gap balance in total knee arthroplasty (TKA) with the use of contemporary implant designs and (2) to describe the authors' intraoperative sizing strategy using anterior referencing (AR) and posterior referencing (PR) systems. METHODS This was a retrospective review of 270 consecutive patients (397 knees) who underwent primary TKA with an AR or PR system. Selection of implant size, mediolateral and anteroposterior alignment of the femoral component, as well as gaps were compared between groups. RESULTS In the AR group, more patients had femoral components which were upsized or downsized compared to those in the PR group (29.5% vs 12.0% respectively) and in patients who underwent bilateral TKA, 49.4% of those in the AR group had femur component size asymmetry. The AR group had better medio-lateral (ML) fit over the distal cutting surface area, smaller change in anterior offset but higher incidence of anterior notching when compared to the PR group. Posterior condylar offset (PCO) was restored in both groups and gap differences in flexion-extension and ML were comparable. There was also no difference in clinical scores and ROM between groups at 2-years follow-up. CONCLUSION In this study, conventional implications related to referencing system were not observed. In practice, AR systems can restore PCO while PR systems do not result in increased anterior notching or anterior overstuffing. Differences observed in this study are most likely related to implant design specifics and surgical technique.
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Affiliation(s)
- Jade Pei Yuik Ho
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, South Korea; Department of Orthopaedic Surgery, Kuala Lumpur General Hospital, Malaysia
| | - Joon Hee Cho
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, South Korea
| | - Hee Seung Nam
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, South Korea
| | - Seong Yun Park
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, South Korea
| | - Yong Seuk Lee
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, South Korea.
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Griffin J, Davis ET, Parsons H, Gemperle Mannion E, Khatri C, Ellard DR, Blyth MJ, Clement ND, Deehan D, Flynn N, Fox J, Grant NJ, Haddad FS, Hutchinson CE, Mason J, Mohindru B, Scott CEH, Smith TO, Skinner JA, Toms AD, Rees S, Underwood M, Metcalfe A. Robotic Arthroplasty Clinical and cost Effectiveness Randomised controlled trial (RACER-knee): a study protocol. BMJ Open 2023; 13:e068255. [PMID: 37295832 PMCID: PMC10277111 DOI: 10.1136/bmjopen-2022-068255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
INTRODUCTION Robotic-assisted knee replacement systems have been introduced to healthcare services worldwide in an effort to improve clinical outcomes for people, although high-quality evidence that they are clinically, or cost-effective remains sparse. Robotic-arm systems may improve surgical accuracy and could contribute to reduced pain, improved function and lower overall cost of total knee replacement (TKR) surgery. However, TKR with conventional instruments may be just as effective and may be quicker and cheaper. There is a need for a robust evaluation of this technology, including cost-effectiveness analyses using both within-trial and modelling approaches. This trial will compare robotic-assisted against conventional TKR to provide high-quality evidence on whether robotic-assisted knee replacement is beneficial to patients and cost-effective for healthcare systems. METHODS AND ANALYSIS The Robotic Arthroplasty Clinical and cost Effectiveness Randomised controlled trial-Knee is a multicentre, participant-assessor blinded, randomised controlled trial to evaluate the clinical and cost-effectiveness of robotic-assisted TKR compared with TKR using conventional instruments. A total of 332 participants will be randomised (1:1) to provide 90% power for a 12-point difference in the primary outcome measure; the Forgotten Joint Score at 12 months postrandomisation. Allocation concealment will be achieved using computer-based randomisation performed on the day of surgery and methods for blinding will include sham incisions for marker clusters and blinded operation notes. The primary analysis will adhere to the intention-to-treat principle. Results will be reported in line with the Consolidated Standards of Reporting Trials statement. A parallel study will collect data on the learning effects associated with robotic-arm systems. ETHICS AND DISSEMINATION The trial has been approved by an ethics committee for patient participation (East Midlands-Nottingham 2 Research Ethics Committee, 29 July 2020. NRES number: 20/EM/0159). All results from the study will be disseminated using peer-reviewed publications, presentations at international conferences, lay summaries and social media as appropriate. TRIAL REGISTRATION NUMBER ISRCTN27624068.
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Affiliation(s)
- James Griffin
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Edward T Davis
- Royal Orthopaedic Hospital NHS Foundation Trust, Birmingham, UK
| | - Helen Parsons
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Elke Gemperle Mannion
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - Chetan Khatri
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - David R Ellard
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Mark J Blyth
- Orthopaedic Research Unit, Department of Trauma and Orthopaedics, Glasgow Royal Infirmary, Glasgow, UK
| | - Nicholas David Clement
- Orthopaedics and Trauma, Royal Infirmary of Edinburgh, Edinburgh, UK
- Department of Orthopaedics, University of Edinburgh Division of Clinical and Surgical Sciences, Edinburgh, UK
| | - David Deehan
- Newcastle Upon Tyne Hospitals NHS Trust, Newcastle Upon Tyne, UK
| | | | | | | | - Fares S Haddad
- University College London Hospitals NHS Foundation Trust, London, UK
| | - Charles E Hutchinson
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
- Warwick Medical School, University of Warwick, Coventry, UK
| | - James Mason
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - Bishal Mohindru
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - Chloe E H Scott
- Department of Orthopaedics, Royal Infirmary of Edinburgh, Edinburgh, UK
- University of Edinburgh Division of Clinical and Surgical Sciences, Edinburgh, UK
| | - Toby O Smith
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - John A Skinner
- Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| | - Andrew D Toms
- Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - Sophie Rees
- Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Martin Underwood
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Andrew Metcalfe
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
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Jenny JY, Baldairon F. The coronal alignment technique impacts deviation from native knee anatomy after total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2022; 31:1427-1432. [PMID: 36125511 DOI: 10.1007/s00167-022-07157-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 09/04/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE The aim of this study was to analyze and quantify the changes in native coronal alignment of a population of TKA patients according to different alignment goals. METHODS Five hundred and twenty TKAs were analyzed. The following angles were measured using an image-free navigation system prior to prosthetic implantation: medial femorotibial mechanical angle without stress and with maximum manual stress to reduce the deformity, medial distal femoral mechanical angle, medial proximal tibial mechanical angle. The native angles were derived from the osteoarthritic knee angles using a validated correction technique, and the overall, femoral and tibial coronal phenotypes were defined. Five different coronal alignment techniques were simulated: mechanical (MA), restricted mechanical (RMA), anatomical (AA), kinematic (KA) and restricted kinematic (RKA). The overall, femoral and tibial coronal phenotypes were compared before and after TKA. The primary endpoint was the binary criterion of whether or not TKA restored the natural overall phenotype. Secondary endpoints were the binary criteria of whether or not the natural femoral and tibial phenotypes were restored by TKA. The rates of restored and non restored phenotypes were compared with a Chi-square test at a 0.05 level of significance, with post hoc tests between all pairs of techniques at a 0.01 level of significance. RESULTS The overall phenotype was restored significantly differently by the five alignment techniques: 15% for MA, 23% for RMA, 2% for AA, 100% for KA and 79% for RKA (p < 0.001). There was a significant difference between each of the technique pairs (p < 0.01 to p < 0.001), except for the mechanical alignment-restricted mechanical alignment pair. The femoral phenotype was restored significantly differently by the five alignment techniques: 37% for MA, 58% for RMA, 19% for AA, 100% for KA and 85% for RKA (p < 0.001). The tibial phenotype was restored significantly differently by the five alignment techniques: 36% for MA, 36% for RMA, 17% for AA, 100% for KA and 88% for RKA (p < 0.001). There was a significant difference between each pair of techniques for both femoral and tibial phenotypes (p < 0.01 to p < 0.001). CONCLUSION Except for the kinematic alignment technique, the various alignment techniques induce significant changes in the pre-arthritic anatomy of the TKA patient. The surgeon must be aware of these modifications. The clinical relevance of this alteration still needs to be defined. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Jean-Yves Jenny
- Locomax Unit, University Hospital, 1 avenue Molière, 67200, Strasbourg, France.
| | - Florent Baldairon
- Locomax Unit, University Hospital, 1 avenue Molière, 67200, Strasbourg, France
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Kazarian GS, Haddad FS, Donaldson MJ, Wignadasan W, Nunley RM, Barrack RL. Implant Malalignment may be a Risk Factor for Poor Patient-Reported Outcomes Measures (PROMs) Following Total Knee Arthroplasty (TKA). J Arthroplasty 2022; 37:S129-S133. [PMID: 35248754 DOI: 10.1016/j.arth.2022.02.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/14/2022] [Accepted: 02/21/2022] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Implant malalignment may be a risk factor for poor patient-reported outcomes measures (PROMs) following total knee arthroplasty (TKA). METHODS Postoperative surveys were administered to assess PROMs regarding satisfaction, pain, and function in 262 patients who underwent surgery at 4 centers in the U.S. and U.K (average age, 67.2) at a mean 5.5 years after primary TKA. Postoperative distal femoral angle (DFA), proximal tibial angle (PTA), and posterior tibial slope angle (PSA) were radiographically measured, and outliers were recorded. PROMs were compared between patients with aligned versus malaligned knees using univariate analysis. RESULTS Patients with DFA, PTA, and PSA outliers were more likely to experience similar or decreased activity levels postoperatively than patients with no alignment outliers, as were patients with 1 or 2 outliers of any kind (P < .05). Patients with DFA, PTA, and PSA outliers were significantly more likely to be dissatisfied with their ability to perform activities of daily living (ADLs), as were patients with 1 or 2 outliers of any kind (P < .05). Patients with DFA and PSA outliers were more likely to be dissatisfied with their degree of pain relief, as were patients with 2 outliers of any kind (P < .05). Finally, patients with DFA and PSA outliers, as well as those with 1 outlier of any kind, were more likely to be dissatisfied with their overall knee function (P < .05). CONCLUSION DFA, PTA, and PSA outliers represent a significant risk factor for decreased satisfaction with activities of daily living(ADLs), pain relief, and knee function, as well as decreased activity levels. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Gregory S Kazarian
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO; Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Fares S Haddad
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO
| | - Matthew J Donaldson
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO
| | - Warran Wignadasan
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO
| | - Ryan M Nunley
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO
| | - Robert L Barrack
- Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO
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Fontalis A, Haddad FS. Roentgen stereophotogrammetric analysis: still a very valuable tool in the orthopaedic research armamentarium. Bone Joint Res 2022; 11:210-213. [PMID: 35369732 PMCID: PMC9057520 DOI: 10.1302/2046-3758.114.bjr-2021-0593.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Andreas Fontalis
- Division of Surgery & Interventional Science, University College London, London, UK.,Department of Trauma and Orthopaedics, University College London Hospitals NHS Foundation Trust, London, UK
| | - Fares S Haddad
- Division of Surgery & Interventional Science, University College London, London, UK.,Department of Trauma and Orthopaedics, University College London Hospitals NHS Foundation Trust, London, UK.,Institute of Sport, Exercise and Health, London, UK.,The Bone & Joint Journal , The British Editorial Society of Bone & Joint Surgery, London, UK
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