Method for the manufacture of a breast prosthesis
The invention relates to a method for the manufacture of a breast prosthesis, comprising: providing and superimposing inner and outer plastic foils; welding together the plastic foils to form the circumferential welding seam, thereby leaving a gap to form a filling channel connecting the inner space to an outside; filling the inner space with a fluid curable mass, which is a precursor of the filler material, by injecting the fluid curable mass into the inner space through the filling channel; and curing the fluid curable mass inside the inner space to form the filler material; wherein the filling channel is provided with a check valve to prevent fluid curable mass from entering the filling channel after injection. The invention additionally proposes a breast prosthesis made by such method.
1. A method for the manufacture of a breast prosthesis,
the breast prosthesis comprising:
a shell, the shell comprising inner and outer plastic foils that are welded together along a common circumference to form a circumferential welding seam and define an inner space of the shell, the inner space being filled with a filler material; and
the method comprising:
providing and superimposing inner and outer plastic foils;
welding together the plastic foils to form the circumferential welding seam, thereby leaving a gap to form a filling channel connecting the inner space to an outside;
filling the inner space with a fluid curable mass, which is a precursor of the filler material, by injecting the fluid curable mass into the inner space through the filling channel; and
curing the fluid curable mass inside the inner space to form the filler material;
wherein the filling channel is provided with a check valve to prevent fluid curable mass from entering the filling channel after injection, and wherein the check valve is a flapper valve.
2. The method of claim 1 , wherein the check valve is formed from a pair of plastic foil pieces that are attached to the inner and outer plastic foils, respectively, and protrude into the inner space from the filling channel.
3. The method of claim 2 , wherein the plastic foil pieces are strip-shaped.
4. The method of claim 1 , wherein the curing of the fluid curable mass inside the inner space is a thermal curing and includes the application of applying heat.
5. The method of claim 1 , wherein the filling channel is sealed during curing the fluid curable mass inside the inner space.
6. The method of claim 1 , wherein the filling channel is sealed by heating and locally applying a pressure for thermal welding.
7. A method for the manufacture of a breast prosthesis,
the breast prosthesis comprising:
a shell, the shell comprising inner and outer plastic foils that are welded together along a common circumference to form a circumferential welding seam and define an inner space of the shell, the inner space being filled with a filler material; and
the method comprising:
providing and superimposing inner and outer plastic foils;
welding together the plastic foils to form the circumferential welding seam, thereby leaving a gap to form a filling channel connecting the inner space to an outside:
filling the inner space with a fluid curable mass, which is a precursor of the filler material, by injecting the fluid curable mass into the inner space through the filling channel; and
curing the fluid curable mass inside the inner space to form the filler material:
wherein the filling channel is provided with a check valve to prevent fluid curable mass from entering the filling channel after injection; and
wherein a support tube is inserted into the filling channel prior to the injecting of the fluid curable mass and wherein the fluid curable mass is injected into the inner space through the support tube.
8. The method of claim 1 , wherein the fluid curable mass is injected from below, with the filling channel being positioned at the bottom end of the inner space.
9. The method of claim 1 , further comprising a step of venting air from the inner space after the fluid curable mass is injected into the inner space and prior sealing the filling channel and curing the fluid curable mass inside the inner space.
10. The method of claim 9 , wherein the venting includes inserting a venting pipe through the filling channel and sucking off air through the venting pipe through a vacuum pump.
11. The method of claim 10 , wherein the venting pipe is inserted into the inner space from below, with the filling channel being positioned at the bottom end of the inner space, and pushed upwards until its tip reaches an air pocket at the top end of the inner space.
12. A breast prosthesis made by the method of claim 2 , the breast prosthesis comprising a pair of plastic foil pieces protrudes into the inner space from the welding seam.
13. The breast prosthesis of claim 12 , wherein the plastic foil pieces are strip-shaped.