Does the anatomic design of total knee prosthesis allow for a better component fit than its nonanatomic predecessor? A matched cohort Study

Maciąg, Bartosz; Stolarczyk, Artur; Maciąg, Grzegorz J.; Dorocińska, Monika; Stępiński, Piotr; Szymczak, Jakub; Świercz, Maciej; Żarnovsky, Krystian; Łapiński, Marcin; Stolarczyk, Magda

doi:10.1016/j.artd.2021.09.001

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…Anatomical prostheses offer asymmetrical tibial baseplates and a broader range of available sizes compared to predecessor models. The possibility of using a larger va-riety of sizes decreases the risk of both tibial and femoral overhang compared to the non-morphometric one [4]. Misalignment of implant and bone shape, such as tibial and femoral overhang, may cause chronic knee pain, decreased range of motion (mainly flexion) and worsened functional outcome [4][5][6].…”

Section: Resultsmentioning

confidence: 99%

“…The possibility of using a larger va-riety of sizes decreases the risk of both tibial and femoral overhang compared to the non-morphometric one [4]. Misalignment of implant and bone shape, such as tibial and femoral overhang, may cause chronic knee pain, decreased range of motion (mainly flexion) and worsened functional outcome [4][5][6]. The implemented anatomical tibial component increases tibial coverage compared to symmetrical designs and allows for proper rotational alignment, the reconstruction of which can be limited in conventional designs (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…According to the study, patients whose posterior condylar offset increased in the range of 0-2 mm benefit the most. Higher offset is also related to lesser bone loss [4]. In the context of the lesser bone loss mentioned a while ago, it is worth noting that one of the anatomical design knee implant systems has the smallest femoral box of all known knee implants and allows for the most sparing bone resection in the intercondylar groove for the Insall box [11].…”

Section: Resultsmentioning

confidence: 99%

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Anatomical knee endoprostheses – does a better-fit lead to better outcomes? A review article

Maciąg¹,

Budzińska²,

Żarnovsky³

et al. 2023

Chir Narzadow Ruchu Ortop Pol

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Introduction. Total knee replacement is the most efficient method of treating end-stage osteoarthritis of the knee joint. The surgery aims to relieve patients of pain, restore range of motion and improve patients’ quality lives. Prostheses design is still being modified and improved through cooperation between orthopaedic surgeons and engineers. Some of the most modern solutions aimed to fit native patients’ anatomy as much as possible are anatomic knee systems. Materials and methods. The literature was reviewed, and articles related to the subject were researched. Therefore, publications including keywords such as total knee replacement, anatomic implants and morphometric implants were searched in the PubMed, Cochrane and Google Scholar databases. All data was selected and verified individually. Analysis and synthesis of studies were prepared separately. Results. Many studies describe the advantages of anatomic prostheses over standard prostheses. Anatomical prostheses have a broader range of available sizes, thus providing better coverage of the distal end of the femur and the proximal tibia, allowing for the resection of less bone tissue, which is beneficial in the event of a possible need for a future revision of the endoprosthesis, enabling better selection of the tibial element rotation by better matching to the tibial plateau, which affects the alignment and patellar movement, and the structure of the trochlear geometry that also affects the patellar movement and reduces the risk of trochlear dysplasia. Conclusions. Anatomical implants enable better alignment of the prosthesis elements and the native femoral and tibial bone. Using these models makes it possible to obtain a greater range of motion and, consequently, improved functional outcomes compared to non-anatomical ones. It also enables less bone resection and better radiological outcomes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Anatomical knee endoprostheses – does a better-fit lead to better outcomes? A review article

Maciąg¹,

Budzińska²,

Żarnovsky³

et al. 2023

Chir Narzadow Ruchu Ortop Pol

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“…Both the Persona and the balanSys implants have PS and CR designs. So far, no studies have shown that TKA implants with an anatomical shape significantly improve the functional outcomes scores postoperatively compared to existing im-plants, although radiological assessments have shown a better fit for these implants 23 .…”

Section: Methodsmentioning

confidence: 99%

Total knee arthroplasty: do newer CR implants yield better results? A single center prospective study

KEMPENAERS,

VAN BEEK,

LAUWERS

et al. 2023

Acta Orthop Belg

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The aim of this study was to compare whether the newest TKA prosthesis (Persona) gives improved clinical outcomes due its more anatomical design in comparison to older prostheses (balanSys). This study included a total of 89 patients planned for TKA from June 2018 to September 2019. Outcomes such as Knee Injury and Osteoarthritis Outcome Score (KOOS), range of motion (ROM), numeric pain rating scale (NRS), analgesics and alignment were recorded next to patient characteristics and complications. Our results showed a significant improvement in NRS, ROM and functional scores postoperatively compared to preoperatively for both the Persona and the balanSys implants. Although the flexion ROM for the Persona group was higher at 6 and 12 months postoperative compared to the balanSys, this was mainly a regaining of the preoperative ROM. Throughout all timepoints, there were no statistically significant differences observed in NSAID and opioid usage between the balanSys and Persona groups. Both implants are safe and efficient to use in the treatment of knee osteoarthritis. Although Persona had an improved postoperative flexion, this did not have an impact on any of the patient-reported outcomes.

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Novel morphogenic knee implant delivers comparable mid-term outcomes as compared to conventional non-morphogenic implants

Sim

Chen

Pang

et al. 2023

Arch Orthop Trauma Surg

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Does the anatomic design of total knee prosthesis allow for a better component fit than its nonanatomic predecessor? A matched cohort Study

Cited by 7 publications

References 34 publications

Anatomical knee endoprostheses – does a better-fit lead to better outcomes? A review article

Anatomical knee endoprostheses – does a better-fit lead to better outcomes? A review article

Total knee arthroplasty: do newer CR implants yield better results? A single center prospective study

Novel morphogenic knee implant delivers comparable mid-term outcomes as compared to conventional non-morphogenic implants

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