Hugh D Tullos Deceased634 Mary Ann Dr, Pearl, MS 39208

4678471, Jul 7, 1987

Aug 22, 1985

6/768284

Philip C. Noble - Houston TX
Hugh S. Tullos - Houston TX
John P. Davidson - Houston TX

A61F 228

623 16

An apparatus and method for making one or more grooves in the medullary canal surface of a bone to secure and reduce the risk of rotational failure of implanted orthopedic endoprostheses. The apparatus includes a head and, attached thereto, a body adapted for insertion into the medullary canal of a bone. The apparatus also includes a channel therethrough that is enclosed in the head and open in the body. One or more grooves is made in the medullary canal surface of a bone by placing the body of the apparatus in the medullary canal, inserting a cutting device in the channel, and then using the cutting device to remove an amount of bone tissue sufficient to form a groove or grooves. The risk of rotational failure of implanted orthopedic endoprostheses is reduced by implanting prostheses that engage and are secured in place by the groove or grooves.

5658338, Aug 19, 1997

Sep 29, 1995

8/536975

Hugh S. Tullos - Houston TX
Philip C. Noble - Houston TX

A61F 228

623 18

Prosthetic systems, specifically acetabular implant systems, each comprising a preformed modular mantle designed to secure an acetabular implant within the acetabulum are disclosed.

4881536, Nov 21, 1989

Jan 22, 1987

7/006563

Phillip C. Noble - Houston TX
Hugh S. Tullos - Houston TX

A61F 104

606 94

An improved surgical procedure for orthopedic implantation of a prosthesis where the conventional metal prosthesis is provided with an integral collar of a bone cement compatible polymer coating of a desired thickness and shape. The collar thickness serves to operably effect a seal with the bone so the prosthesis becomes a pressurizing plunger during the last phase of inserting the prosthesis into the bone opening or cavity. A slowly developing pressure build up of the viscous bone cement provided by the tapered shape of the collar thickness assures bone cement flow into all bone crevices and minimizes bone cement porosity by reducing the size of the voids formed by entrapped air during curing of the bone cement. The preformed collar also provides a predetermined thickness or layer of bone cement at the critical structural locations in order to ensure the surgeon of optimum physical characteristics of the bone cement at that location and avoid direct contact of the metal prosthesis with the bone. The collar also functions as a positioning mechanism to assit the surgeon in proper positioning of the prosthesis.