Degradable sheath interface screw assembly and manufacturing process thereof
A technology of interface screw and manufacturing process, applied in fastening devices, medical science, internal bone synthesis, etc., can solve the problems of product residue, secondary injury, etc., to prevent tendon cutting, prevent screw breakage, and eliminate product residue hazards. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031] Example 1: Take 60 parts of L-polylactic acid, 30 parts of hydroxyapatite, and 10 parts of β-tricalcium phosphate, put millimeter-sized polylactic acid into a freezing grinder, and freeze and grind it until it is ground into micron-sized small particles. Lactic acid, the freezing temperature is -196±10°C liquid nitrogen, the cooling time is 5-100min, the grinding time is 10min-120min, and then put into a vacuum dryer for high-temperature drying. The vacuum drying temperature is 40°C-80°C. The time is 0.5 to 8 hours; the hydroxyapatite and the β-tricalcium phosphate are dried separately, and then the two are put into a mechanical mixer according to the weight ratio, and stirred until they are evenly mixed; the dried polylactic acid powder is Said parts by weight are put into a mechanical mixer, and stirred again until evenly mixed to obtain mixed raw material powder. The mixed raw material powder obtained by mixing is put into a tablet press, and the mixed raw material p...
Embodiment 2
[0032]Example 2: Take 65 parts of L-polylactic acid, 30 parts of hydroxyapatite, and 5 parts of β-tricalcium phosphate, put millimeter-sized polylactic acid into a freeze grinder, and freeze and grind it until it is ground into micron-sized small particles of polylactic acid. Lactic acid, the freezing temperature is -196±10°C liquid nitrogen, the cooling time is 5-100min, the grinding time is 10min-120min, and then put into a vacuum dryer for high-temperature drying. The vacuum drying temperature is 40°C-80°C. The time is 0.5 to 8 hours; the hydroxyapatite and the β-tricalcium phosphate are dried separately, and then the two are put into a mechanical mixer according to the weight ratio, and stirred until they are evenly mixed; the dried polylactic acid powder is Said parts by weight are put into a mechanical mixer, and stirred again until evenly mixed to obtain mixed raw material powder. The mixed raw material powder obtained by mixing is put into a tablet press, and the mixed...
Embodiment 3
[0033] Embodiment 3: Take 70 parts of L-polylactic acid, 25 parts of hydroxyapatite, and 5 parts of β-tricalcium phosphate, put millimeter-sized polylactic acid into a freezing grinder, and freeze and grind it until it is ground into micron-sized small particles of polylactic acid. Lactic acid, the freezing temperature is -196±10°C liquid nitrogen, the cooling time is 5-100min, the grinding time is 10min-120min, and then put into a vacuum dryer for high-temperature drying. The vacuum drying temperature is 40°C-80°C. The time is 0.5 to 8 hours; the hydroxyapatite and the β-tricalcium phosphate are dried separately, and then the two are put into a mechanical mixer according to the weight ratio, and stirred until they are evenly mixed; the dried polylactic acid powder is Said parts by weight are put into a mechanical mixer, and stirred again until evenly mixed to obtain mixed raw material powder. The mixed raw material powder obtained by mixing is put into a tablet press, and the...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle size (mesh) | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More