Paul J Saenger

US Patent:

6468280, Oct 22, 2002

Filed:

Jul 24, 2000

Appl. No.:

09/624265

Inventors:

Paul L. Saenger - Asheville NC
Richard J. Kana - Lexington TX

Assignee:

Sulzer Orthopedics Inc. - Austin TX

International Classification:

A61B 1758

US Classification:

606 88, 606 87, 606102

Abstract:

A surgical instrument for establishing and verifying cutting depth and alignment includes a distal saw drill guide, a rod adaptor removably mounted on the distal saw drill guide and a modular alignment rod removably mounted on the rod adaptor. The distal saw drill guide includes pin apertures for receiving a plurality of pins for locating the distal saw drill guide on the distal end of a femur. A distal saw block is mounted on the pins in replacement of the distal saw drill guide the rod adaptor and the alignment rod. A stylus is adjustably attached to a stylus block which is movably mounted on the distal saw block. The rod adaptor and modular alignment rod are movably mounted on the distal saw block in replacement of the stylus and stylus block.

US Patent:

6632225, Oct 14, 2003

Filed:

Jun 20, 2001

Appl. No.:

09/885864

Inventors:

Adam H. Sanford - Warsaw IN
Toby N. Farling - Warsaw IN
Robert A. Hodorek - Warsaw IN
Mark A. Price - Warsaw IN
Paul L. Saenger - Asheville NC
Richard V. Williamson - Ana Cortes WA

Assignee:

Zimmer, Inc. - Warsaw IN

International Classification:

A61F 500

US Classification:

606 87, 606 90

Abstract:

A method of resecting a proximal tibia and distal femur for implanting a partial knee prosthesis uses a resecting kit which includes multiple spacers, each of which has a different spacing dimension. A surgeon selects the appropriate spacer with the amount of correction desired to align the patients leg and installs the spacer with the spacing dimension between the distal femur and proximal tibia which is to receive the partial knee prosthesis. The spacers have projecting stems, upon which a resector is installed. The resector is then aligned with the axis selected by the surgeon according to known methods, and is pinned to the femur and proximal tibia. A distal femoral cut is then made in the femur after which the resector is removed while leaving at least two of the pins in place, the pins being headless pins. A second resector is then installed on the pins to effect the required cut of the tibia. Additional cuts are made in the femur according to known procedures, and the femoral and tibial prostheses are then installed, according to known procedures.

US Patent:

7094241, Aug 22, 2006

Filed:

Nov 27, 2002

Appl. No.:

10/305697

Inventors:

Robert A Hodorek - Warsaw IN, US
Adam H Sanford - Warsaw IN, US
Richard V Williamson - Ana Cortes WA, US
Paul L Saenger - Asheville NC, US
Toby N Farling - Warsaw IN, US

Assignee:

Zimmer Technology, Inc. - Chicago IL

International Classification:

A61F 5/00

US Classification:

606 87

Abstract:

A method and apparatus for correcting limb alignment in a unicondylar knee arthroplasty and linking the distal femoral cut and the proximal tibial cut. Alignment rods are connected to a spacing apparatus to facilitate correction of limb alignment. The alignment rods are positioned along the mechanical axis of the femur and the tibia and the knee joint is positioned to correct alignment. A spacing apparatus is positioned in the relevant knee compartment and utilized to hold the knee in position to correct limb alignment. The spacing apparatus includes a femoral cut slot through which the distal femoral cut is made and further includes tibial affixment apertures through which a headless securing device can be positioned to secure the spacing apparatus to the tibia. After the distal femoral resection is complete, the spacing apparatus is removed, with the headless securing devices remaining positioned in the tibia. The headless securing devices are used as a reference for securing a tibial cut block to the tibia for making the proximal tibial resection.

US Patent:

7285122, Oct 23, 2007

Filed:

Jun 16, 2003

Appl. No.:

10/462174

Inventors:

Adam H. Sanford - Warsaw IN, US
Toby N. Farling - Warsaw IN, US
Robert A. Hodorek - Warsaw IN, US
Mark A. Price - Warsaw IN, US
Paul L. Saenger - Asheville NC, US
Richard V. Williamson - Ana Cortes WA, US

Assignee:

Zimmer, Inc. - Warsaw IN

International Classification:

A61F 5/00
A61B 17/58

US Classification:

606 87, 606 88, 606 90

Abstract:

A method of resecting a proximal tibia and distal femur for implanting a partial knee prosthesis uses a resecting kit which includes multiple spacers, each of which has a different spacing dimension. A surgeon selects the appropriate spacer with the amount of correction desired to align the patient's leg and installs the spacer with the spacing dimension between the distal femur and proximal tibia which is to receive the partial knee prosthesis. The spacers have projecting stems, upon which a resector is installed. The resector is then aligned with the axis selected by the surgeon according to known methods, and is pinned to the femur and proximal tibia. A distal femoral cut is then made in the femur after which the resector is removed while leaving at least two of the pins in place, the pins being headless pins. A second resector is then installed on the pins to effect the required cut of the tibia. Additional cuts are made in the femur according to known procedures, and the femoral and tibial prostheses are then installed, according to known procedures.

US Patent:

7842039, Nov 30, 2010

Filed:

Jul 10, 2006

Appl. No.:

11/456303

Inventors:

Robert A. Hodorek - Warsaw IN, US
Adam H. Sanford - Warsaw IN, US
Richard V. Williamson - Ana Cortes WA, US
Paul V. Saenger - Asheville NC, US
Toby N. Farling - Warsaw IN, US

Assignee:

Zimmer Technology, Inc. - Warsaw IN

International Classification:

A61F 5/00

US Classification:

606 87

Abstract:

A method and apparatus for linking the distal femoral cut and the proximal tibial cut in unicondylar knee arthroplasty is disclosed. A spacing apparatus is positioned in the relevant knee compartment and utilized to hold the knee in position to correct limb alignment. The spacing apparatus includes a femoral cut slot through which the distal femoral cut is made and further includes tibial affixment apertures through which a headless securing device can be positioned to secure the spacing apparatus to the tibia. After the distal femoral resection is complete, the spacing apparatus is removed, with the headless securing devices remaining positioned in the tibia. The headless securing devices are used as a reference for securing a tibial cut block to the tibia for making the proximal tibial resection. With the mechanism of the present invention, the knee can be placed in flexion when making the proximal tibial cut.

US Patent:

8454616, Jun 4, 2013

Filed:

Jul 10, 2006

Appl. No.:

11/456310

Inventors:

Robert A. Hodorek - Warsaw IN, US
Adam H. Sanford - Warsaw IN, US
Richard L. Williamson - Ana Cortes WA, US
Paul V. Saenger - Asheville NC, US
Toby N. Farling - Warsaw IN, US

Assignee:

Zimmer, Inc. - Warsaw IN

International Classification:

A61F 5/00

US Classification:

606 87

Abstract:

A method and apparatus for correcting limb alignment in a unicondylar knee arthroplasty and linking the distal femoral cut and the proximal tibial cut. Alignment rods are connected to a spacing apparatus to facilitate correction of limb alignment. The alignment rods are positioned along the mechanical axis of the femur and the tibia and the knee joint is positioned to correct alignment. A spacing apparatus is positioned in the relevant knee compartment and utilized to hold the knee in position to correct limb alignment. The spacing apparatus includes a femoral cut slot through which the distal femoral cut is made and further includes tibial affixment apertures through which a headless securing device can be positioned to secure the spacing apparatus to the tibia. After the distal femoral resection is complete, the spacing apparatus is removed, with the headless securing devices remaining positioned in the tibia. The headless securing devices are used as a reference for securing a tibial cut block to the tibia for making the proximal tibial resection.

US Patent:

6361506, Mar 26, 2002

Filed:

Jul 20, 2000

Appl. No.:

09/620432

Inventors:

Paul L. Saenger - Asheville NC
Richard J. Kana - Lexington TX

Assignee:

Sulzer Orthopedics Inc. - Austin TX

International Classification:

A61B 5103

US Classification:

600587, 33512, 606 53, 606102

Abstract:

A surgical measuring instrument includes a caliper having pin apertures formed therein for mounting on surgical pins in a first skeletal member. An adaptor includes pin apertures on a first portion for mounting on the surgical pins when the caliper is removed, and includes adaptor pins extending from a second portion for engagement with the caliper. A rod is connected to the caliper for indicating alignment and flexibility of a second skeletal member relative to the first skeletal member.