Instruments and methods for flexion gap adjustment

专利名称：Instruments and methods for flexion gap

adjustment

发明人：MATTHEW SMITH,DOUGLAS A

DENNIS,BRYAN J SMITH

申请号：AU20032035申请日：20030328

公开号：AU20032035A1公开日：20031030

摘要：A flexion gap instrument is configured to mate with a ligament tensioning tool,such as known distraction devices and pivoting knee balancers. The instrument facilitatesmaking A/P resections in the femur for placement of a femoral prosthesis component tomaintain an optimum symmetric flexion gap, which will avoid the risk of medial or laterallaxity in flexion, instability of articulating component dislocation. The instrument includesa base that is configured to sit within the ligament tensioning device, and a verticallyextending upstanding portion that is configured to mate with a cutting block or otherknee arthroplasty instrument that must be positioned relative to the distal end of thefemur. The upstanding portion includes a measurement plate that bears a scale indicatinga flexion gap distance. The scale can be used to orient and align the cutting block in itsproper position relative to the distal end of the femur, and to orient the cutting blockparallel with the tibial plateau with the ligaments properly and equally tensed. In certainembodiments, a leaf spring can be incorporated into the upstanding portion to helpsupport the cutting block and provide means for temporarily positioning the cuttingblock on the flexion gap instrument without the need for additional or supplemental

locks.

申请人：DEPUY ORTHOPAEDICS, INC.

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