Sagittal radius of curvature, trochlea design and ultracongruent insert in total knee arthroplasty

Jimmy Wui Guan Ng; Benjamin V Bloch; Peter J James

doi:10.1302/2058-5241.4.180083

Sagittal radius of curvature, trochlea design and ultracongruent insert in total knee arthroplasty

EFORT Open Rev. 2019 Aug 7;4(8):519-524. doi: 10.1302/2058-5241.4.180083. eCollection 2019 Aug.

Authors

Jimmy Wui Guan Ng¹, Benjamin V Bloch¹, Peter J James¹

Affiliation

¹ Nottingham City Hospital, Nottingham, UK.

Abstract

Multi radius (MR) total knee arthroplasty (TKA) has been associated with mid-flexion instability.Single radius (SR) TKA may provide better anteroposterior stability through single flexion axis and biomechanical advantage for quadriceps function.Medial pivot (MP) TKA and gradually reducing (GR) radius TKA produce better knee kinematics.Clinical outcomes are equivalent for SR, MR and MP TKA.Short-term studies have shown better clinical outcomes and kinematics for GR TKA.Thinner and narrow anterior flange, deeper trochlea groove and more anatomical trochlea design reduces patellofemoral complications in TKAUltracongruent inserts provide comparable clinical outcomes to posterior-stabilized TKA and cruciate retaining TKA. Cite this article: EFORT Open Rev 2019;4:519-524. DOI: 10.1302/2058-5241.4.180083.

Keywords: sagittal radius of curvature; trochlea geometry; ultracongruent insert.

Publication types

Review