Degradable and extratracheal outer suspending support and indirect 3D printing method thereof

Abstract

The invention discloses a degradable and extratracheal suspending support and an indirect 3D printing method thereof. The support is provided with several C-shaped cylindrical ring structures, the C-shaped cylindrical ring structures are arranged in an array mode, the opening angle of the cylindrical rings is 90 degrees, and the surface of each C-shaped cylindrical ring structure is in an arc shape, so that the extratracheal support shows fluctuating heave-and-sunken structures as a whole; on the C-shaped cylindrical ring structures, penetrating holes are punched at every 90 degrees on the protrusion structures. The indirect 3D printing method of the support comprises the steps of using a 3D printing technology to manufacture resin parts formed by internal dies and external dies, cleaning clearly the resin parts, using biological silica gel to conduct rollover on the resin parts, preheating the obtained silica gel die, afterwards adding a medical biological degradable material in a silica gel external die, conducting vacuum pumping treatment after the material is totally fused, afterwards putting the fused material into a silica internal die to fix the material, naturally cooling, demolding the material after the material cools down to obtain the degradable and extratracheal suspending support. The manufactured degradable and extratracheal suspending support has high mechanical performance and surface roughness, and has an in-vivo degradable property.

Description

technical field [0001] The invention relates to the technical field of biomanufacturing, in particular to a degradable external tracheal suspension bracket and an indirect 3D printing method thereof. Background technique [0002] Severe chest and neck crush, glottis closure can lead to tracheal damage or even rupture, certain congenital diseases (such as children's tracheomalacia) and acquired scar stenosis including various inflammations or trauma, and crushed tumors around the trachea , tracheotomy or intubation, and tracheal stenosis caused by radiotherapy for adjacent lesions will threaten the life of the patient. The manufacture and use of degradable tracheal stents provide new ideas and methods for clinical treatment, and provide new treatment methods for patients with tracheomalacia and tracheal limit defects. At present, 3D printing technology includes light curing technology, fused deposition technology, inkjet printing method and other methods. Its direction in th...

AI Technical Summary

Problems solved by technology

Using the existing 3D printing technology to manufacture tracheal stents will have the following problems: 1) To manufacture tracheal stents using photocuring molding technology, it is necessary to add photosensitizers to the material, and photosensitizers are generally harmful to the human body, which does not meet the requirements of implants ; 2) The tracheal stent is manufactured by laser fusion deposition technology, and the obtained tracheal stent has poor compactness, and the strength in the vertical direction is not good enough; 3) The tracheal stent is manufactured by the selective laser sintering method, and the surface roughness is relatively large, and the powder The adhesion is not strong, and it is easy to cause inflammation when implanted into the human body as an implant

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