Porous structure bone cement screw design and manufacturing method thereof

A porous structure and structural design technology, applied in the field of medical devices, can solve problems such as rust, bone secondary injury, implant shedding, etc., to achieve the effect of expanding the application range, promoting rapid recovery, and avoiding secondary injury

Inactive Publication Date: 2015-07-29
XI AN JIAOTONG UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the traditional titanium alloy medical screw, its elastic modulus is quite different from that of real bone and its compatibility with human bone tissue is poor. It is easy to have stress concentration a

Method used

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  • Porous structure bone cement screw design and manufacturing method thereof
  • Porous structure bone cement screw design and manufacturing method thereof

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Embodiment Construction

[0025] The bone cement screw with porous structure of the present invention will be further described below in combination with specific examples.

[0026] Such as figure 1 As shown, a bone cement screw with a porous structure of the present invention includes a porous support body 1 , a solid cylinder body 2 and a threaded body 3 connected in sequence. In order to make the porous support body 1 and the threaded body 3 tightly combined, the middle solid cylinder 2 plays a transitional role, and the ratio of its length to diameter should be at least 1:1. And the length of the thread body is 30%-80% of the whole porous structure bone cement screw; the porosity of the porous support body 1 is 30%-80%. The surface of the solid cylinder is smooth, and in order to ensure the bonding strength with the porous support and the threaded part, its length should be at least 2 mm.

[0027] see figure 2 Shown, the preparation method of a kind of porous structure bone cement screw of the ...

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Abstract

The invention relates to a porous structure bone cement screw design and a manufacturing method thereof. The method comprises the following steps that (1) a three-dimensional model of a screw is designed, then, a model of a screw mold is exported, and next, layered slicing software is used for carrying out layered slicing on the model according to the set thickness; (2) the screw mold is printed out through a laser sintering technology; (3) in a vacuum casting machine, bone cement is cast in a vacuum way in the screw mold; (4) the bone cement is taken out from the vacuum casting machine after being completely cured, and the still standing is carried out for a period of time, so that the mold is uniformly cooled in the air; (5) the screw mold filled with the bone cement is solved into a solvent so that the screw mold is dissolved, and finally, a formed porous bone cement screw is obtained. The porous structure bone cement screw design and the manufacturing method solve the problem that bone cement biological materials cannot be used for preparing product parts, and the application range of the biological materials is enlarged. The invention first provides the porous structure design of a medical screw, the fast recovery of the fracture bone can be promoted, and the secondary injury to the bone caused by the traditional medical screw after the operation is avoided.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to an internal fixation porous structure biological material screw for orthopedic surgery and a preparation method thereof. Background technique [0002] Fracture treatment has a very long history. The earliest evidence of fracture healing was found in a mummy unearthed in Naga ed Der, Egypt in 1902, dating to 300 BC. In 1852, Dutch doctor Mathijsen began to use plaster bandages to immobilize affected limbs. 130-200 AD, in the early writings of Galen, descriptions of traction treatment of fractures appeared. Continuous traction treatment of fractures began in the mid-19th century. In 1767, Gooch introduced the functional bracket. In 1875, Franz Konig first reported the use of screws to fix fractures. The use of metal plate screws for fracture fixation was first reported by Carl Hansmann in Hamburg in 1886. In 1907, Albin Lambotte introduced the new term "Osteosyn...

Claims

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Application Information

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IPC IPC(8): A61B17/86A61L31/14
CPCA61B17/866A61B2017/00004A61B2017/00526
Inventor 王伊卿付金国郝明仲卢秉恒陈剑
Owner XI AN JIAOTONG UNIV
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