ArticleActa orthopaedica et traumatologica turcica2019
Postoperative mechanical alignment analysis of total knee replacement patients operated with 3D printed patient specific instruments: A Prospective Cohort Study.
Article in Acta orthopaedica et traumatologica turcica, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 15 citations in OpenAlex.
- Application of patient-specific surgical guides in foot and ankle surgery.Acta orthopaedica et traumatologica turcica · 2025Review
- Review
- Bibliometric analysis of the Acta Orthopaedica et Traumatologica Turcica from 2013 to 2022.Acta orthopaedica et traumatologica turcica · 2024Article
- Clinical applications and prospects of 3D printing guide templates in orthopaedics.Journal of orthopaedic translation · 2022Review
- Three-Dimensional Printing of Medical Devices Used Directly to Treat Patients: A Systematic Review.3D printing and additive manufacturing · 2021Review
- Application of 3D Printing in Hip and Knee Arthroplasty: A Narrative Review.Indian journal of orthopaedics · 2021Review
- Knee Prosthesis in the Computer Era.Orthopaedic surgery · 2021Review
- Integration of Three-dimensional Technologies in Orthopedics: A Tool for Preoperative Planning of Tibial Plateau Fractures.Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : casopis Drustva za medicinsku informatiku BiH · 2020Article
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Authors and funding
6 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTotal knee replacement (TKR) is a surgical treatment for final stage gonarthrosis. The lifespan of the prosthetic implants used in TKR surgery is a major interest for the orthopaedic research community.Previously, proper implant alignment of the implants has been advocated for longevity of the TKR surgery. Recently, patient-specific (PSI) instruments have been proposed to improve the mechanical alignment of the TKR by permitting better implant positioning over conventional TKR surgery. The aim of this study is to compare the mechanical alignment results of patients operated with PSIs and conventional instruments.
methodsTwo groups of 20 patients chosen in a quasi-random manner have been compared in this study. In the first group femoral distal and tibial osteotomies were made by a PSI which was produced by the patients' computed tomography scans. All osteotomies in the control group were made with the TKR set's routine instruments by conventional means. Patients' preoperative and postoperative mechanical femorotibal angles (mFTA), femoral coronal angles (FCA), tibial coronal angles (TCA) were measured and the number of outliers which showed more than 3° of malalignment were counted in both groups for comparison.
resultsThe average postoperative mFTA was found to be 2.09° for the PSI group and in was found to be 2.84° for the control which was not statistically significant. The comparison of postoperative FCA and TCA also did not show significant difference between the groups. The number of outliers showing more than 3° of malalignment per group were found to be 1 out of 20 (5%) for the PSI group and 7 out of 20 (35%) for the control which was statistically significant.
conclusionIn this study patient-specific instrumentation provided significantly better mechanical alignment compared to conventional TKR for the frequency of outlier cases with malalignment beyond 3°. PSI proved no significant difference when the groups were compared for mFTA, FCA and TCA. Our findings support that PSI may improve TKR alignment by improving the ratio of the outlier patients with marked malalignment. LEVEL OF EVIDENCE: Level III, Therapeutic Study.
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