Development and Application of a Tendon Prosthesis for Early Functional Restoration of the Hand.
Abstract
The basic Hunter tendon, a dacron silicone mold prosthesis has been prepared in four sizes and shapes. The function of the prosthesis is being studied in the dog and primate with reference to gliding pseudo sheath formation, fluid formation and distal and proximal juncture attachments. A new tendon prosthesis design using the 304 and 316 L stainless steel yarn was designed. The yarn was covered with high pressure mold silicone process and its services are inert and smooth for implantation. The porous metal yarn, 250 micra, is exposed at the prosthetic end for end attachment investigation. Distal end attachment was studied using the porous tape. Forty-eight samples were placed into the metacarpal and forearm bones of the dog for periods of 4, 8, 12 and 16 weeks. Bone specimens were tensile tested. Tape shears were irregular and new weave techniques will be developed. It was determined from this study that 304 stainless steel tape was not acceptable for implantation due to tissue reactions. Strength union of 316 L metal tapes approached 50% of the initial strength of the 5 mm. tape. Cross tissue was studied using 160 gauge steel mesh screens in the vastus lateralis muscles of dogs. The evaluation of tensile testing was inconsistent and will be made available at a later date. Tenosynovial fluid in the canine tendon implants was studied and preliminary antibody titers will be established. The studies will continue using dacron tape and woven stainless stell tapes for the shaft of the flexible implant. Each study of end device fixation will include plates, screws, loop designs as well as mesh material to permit tissue ingrowth. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA086322
Entities
People
- James M. Hunter
Organizations
- Thomas Jefferson University