Bone cement locking bone screw used for locking bone fracture plate
A bone screw and bone cement technology, which is applied in the field of surgical instruments and devices, can solve the problems of screw failure, bone nonunion, and the thread holding force of the locking screw rod is reduced, and achieves the effect of improving the holding force.
Pending Publication Date: 2018-01-16
SUZHOU XINRONG BEST MEDICAL INSTR
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Problems solved by technology
[0002] With the increase of age and the reduction of estrogen levels in women after menopause, osteoporosis has become one of the important reasons that plague the health of the elderly, and osteoporosis plus accidental fractures will bring great trouble to fracture treatment. Due to osteoporosis, the bone trabecular density of the tubular bone condyle joints of the extremities becomes smaller, and the holding force of the locking screw shank thread in the bone is greatly reduced, which is very easy to cause screw failure, bone nonunion, and fracture nonunion.
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[0016] Such as Figure 1 to Figure 4 As shown, the bone cement locking bone screw used for locking the bone plate of the present invention includes a frustum-shaped head 1 and a cylindrical nail body 2 integrally connected with it. The head 1 is the state after the circular platform rotates 90° clockwise. The imaginary upper bottom surface of the head 1 and the nail body 2 are connected by a concave arc surface connection part 4 to reduce the stress concentration at the connection between the two and prevent the screw from twisting. A double thread 11 is processed on the head 1 so as to be fixed with the locking hole of the locking bone plate through the double thread 11 to form angular stability. Among them, the locking bone plate is a commonly used device in orthopedic surgery, and its structure and usage refer to conventional technical means in the field, and will not be repeated here. The middle part of the head 1 is provided with a screw hole 12. Preferably, for the con...
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The invention discloses a bone cement locking bone screw used for locking a bone fracture plate. The bone cement locking bone screw comprises a cone-frustum-shaped head portion and a screw body in a cylinder shape, wherein the screw body and the head portion are connected into a whole, a double thread and a screw hole are machined in the head portion, the head and a locking hole for locking the bone fracture plate are fixed through the double thread, the bone cement locking bone screw further comprises a bone cement channel, one end of the bone cement channel extends into the head portion andis engaged with the screw hole coaxially, the other end of the bone cement channel extends to a long hole in the end of the screw body, and the bore diameter R of the screw hole is larger than the maximum bore diameter r of the long hole. The bone cement locking bone screw used for locking the bone fracture plate is simple in structure and convenient to use, and the holding force of the screw canbe increased under the condition of osteoporosis.
Description
technical field [0001] The invention relates to the technical field of surgical instruments, devices or methods, in particular to a bone cement locking bone screw for locking a bone plate. Background technique [0002] With the increase of age and the reduction of estrogen levels in women after menopause, osteoporosis has become one of the important reasons that plague the health of the elderly, and osteoporosis plus accidental fractures will bring great trouble to fracture treatment. Due to osteoporosis, the bone trabecular density of the tubular condylar joints of the extremities becomes smaller, and the holding force of the locking screw shank thread in the bone is greatly reduced, which is very easy to cause screw failure, bone nonunion, and fracture nonunion. Contents of the invention [0003] In order to solve the above problems, the present invention provides a bone cement locking bone screw for locking bone plates, which is simple in structure, easy to use and can ...
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IPC IPC(8): A61B17/86A61B17/88
Inventor 贺军王雄飞蔡渊源贺坚张明德黄丙寅袁芦荻石磊王攀峰
Owner SUZHOU XINRONG BEST MEDICAL INSTR