In vivo determination of knee kinematics for subjects implanted with a unicompartmental arthroplasty

No Long-term Difference Between Fixed and Mobile Medial Unicompartmental Arthroplasty

“…The Knee Society scores [18] were comparable in the two groups and comparable with the function scores reported in the literature with excellent pain relief in the treatment of the medial compartment arthritis (Table 5) [7,9,11,25,38,41]. In vivo kinematic studies suggest patients implanted with fixed-bearing UKA have kinematics close to the normal knee despite some cases of paradoxical anterior translation seen over time [3]. In vivo kinematic studies failed to demonstrate kinematic advantages of mobile-bearing over fixed-bearing in UKA [25], probably related to the fact that both cruciates are present in UKA [21,25,38].…”

“…Unilateral knee arthroplasty (UKA) is a bone and ligamentsparing technique that reliably restores knee kinematics and function for arthritis limited to one compartment of the knee [2,3,25,30]. Function and survivorship after UKA improved since its introduction more than 30 years ago as a result of improvements in designs, indications, materials, and surgical techniques [17,36].…”

“…Function and survivorship after UKA improved since its introduction more than 30 years ago as a result of improvements in designs, indications, materials, and surgical techniques [17,36]. Reported function and survivorship of UKA are better when the anterior cruciate ligament is intact [3,6] and kinematic studies suggested that maintaining the anterior cruciate ligament may be advantageous in terms of survivorship, stairclimbing ability, patient satisfaction, and joint kinematics [3,6,7,25,31]. Historically, the first available UKAs were cemented fixed-bearing all-polyethylene UKA [17].…”

Long-term Results With a Lateral Unicondylar Replacement

“…When there is full loss of cartilage in the affected compartment, osteotomy is usually no longer considered and UKA offers an alternative to TKA when the other compartments are preserved [12,13,17,32,33]. UKA has several potential advantages compared with TKA such as reduced morbidity, quicker recovery, the preservation of bone stock, and a more physiological knee function [2][3][4]32]. Midterm and long-term studies suggest reasonable outcome at 10 years with survivorship greater than 95% of UKA performed for medial osteoarthritis or osteonecrosis [2,29], but limited long-term followup data are available for lateral UKA in the literature [5,14,17,30,32].…”

Tratamento da artrose unicompartimental medial do joelho com artroplastia unicompartimental tipo Repicci II: relato preliminar de 42 casos

“…Segundo Repicci et al, a UNI apresenta vantagens sobre outras opções cirúrgicas por ser menos invasiva, preservando: o estoque ósseo, a articulação patelofemoral, os ligamentos cruzados e o compartimento contralateral (16) . Além disso, estudos demonstram sua capacidade em reproduzir com maior fidelidade a cinemática e a propriocepção normais do joelho (31)(32)(33) .…”