Processes for the manufacture of organ prostheses

Claim 1

A process for manufacture of an organ prosthesis, comprising the steps of: (a) forming a support of a completely eliminable material selected from the group of wax, ceresin or a sol selected from the group consisting of gelose and gelatin in solution which, on cooling, forms a gel, in the shape of the organ prosthesis, said support being formed by molding the completely eliminable material in a removable mold whose surfaces are devoid of any rough or uneven areas and then releasing the molded completely eliminable material from said removable mold; (b) depositing on said support preformed in the shape of the organ prosthesis a sol selected from the group consisting of gelose and gelatin which, no cooling, forms a gel having a surface state approximately the same as the liquid-air interface of gelose or gelatin in solution at its surface not adjacent the support; (c) cooling said sol to form said gel; (d) depositing a hardenable flexible material compatible with body fluids and tissues on said gel; (e) hardening said hardenable flexible material, thereby forming said organ prosthesis of a hardened flexible material, said hardened flexible material having a surface state adjacent said gel that is devoid of roughness, whereby formation of concentrations and deposits, during use of the organ prosthesis, due to roughness is avoided; and (f) removing said organ prosthesis from said support; said removing including eliminating said gel and support from the organ prosthesis, whereby said gel aids in forming the surface state of hardened flexible material devoid of roughness and eliminating said gel and support acts to remove the organ prosthesis from the support.