A six-degree-of-freedom transducer for in vitro measurement of patellofemoral contact forces

摘要: Abstract A satisfactory design of the patellar component used in total knee arthroplasty and a general understanding effects othopedic procedures require, part, an accurate description patellofemoral contact forces. Experimental determination stress distribution requires integration to estimate Due complex geometry, components resultant load is difficult. Current techniques for direct measurement loads either report single or require sequential experiments fully describe force. The present study describes development six-degree-of-freedom force transducer. This transducer allows simultaneous three with increase accuracy over available devices. forces are 1% full scale (900 N anterior-posterior, ±200 medial-lateral inferior-superior). location on patella where acts determined within 1 mm. Relative movement this point as function normal change flexion angle result typical orthopedic procedure 0.1 protocol presented that be anatomically following arthroplasty.