Newsroom — Published on: Postoperative and preoperative start of low molecular weight heparin LMWH does not change the outcome of mortality or risk of reoperation in patients with hip fractures treated with osteosynthesis, according to a recent study. Thromboprophylaxis is commonly given to patients with hip fractures treated with osteosynthesis to prevent the development of thrombosis. However, thromboprophylaxis and surgery also predispose patients to the risk of bleeding, leading to anemia, reoperation, and transfusions.
It finds a particularly important, although not exclusive, application in the field of anchors for orthopedic surgery of the hand and of the foot, more particularly at the phalanxes of the fingers and of the toes, but also of the metacarpals and metatarsals and notably for corrective surgery for the hand and for the foot.
Note than an osteosynthesis anchor must be used to keep in place two or more portions of one and the same bone fractured or cut by a surgical operation osteotomy for the time necessary for this bone to consolidate typically three months.
An arthrodesis for its part is the immobilization of an articulation by surgical means in order to weld two bones into a single bone, by means of an osteosynthesis device. In general the object of any osteosynthesis, and particularly in the case of an arthrodesis, is to seek a very good stability of the anchor in order to obtain the consolidation in the best conditions, that is to say in the position chosen by the surgeon, while minimizing the problems of postoperative pain and edemas, and while shortening the consolidation time as much as possible.
In order to obtain this result, the shape of the anchor is critical. Another object sought is to provide and maintain a slight compression between the portions of bone to be fused, which makes the consolidation easier.
Here again the shape of the anchor is important. Various technical solutions have already been proposed for achieving such an osteosynthesis, notably at the extremities foot, hand, wrist, ankle, etc. In addition to the conventional or Define osteosynthesis staples, it is for example routine to use screws, notably double-pitch screws allowing the placing in compression.
In these screws, the pitch of each end is different distal pitch and Define osteosynthesis or head pitchfor example 0. These known screws may be tubular mounting on a pin or not. They are Define osteosynthesis self-tapping, that is to say that they do not usually require drilling.
Document FR 2 describes a self-tapping screw in the distal portion, for which it is nevertheless often necessary to carry out a real pre-drilling notably in the proximal portion which takes away the value of the self-drilling.
Moreover, the cutting ridges of the threads are defined at the bore, which weakens the screw, that is to say that in practice the teeth thus defined break very easily.
A second frequent problem with these screws is that their length must be perfectly suited to the bony site so as not to create discomfort, and therefore that they must be screwed immediately in contact with the bone without pushing the latter away at the distal end, while ensuring a good anchorage of the end, which means a cylindrical end making good penetration impossible.
Therefore a screw is known U. Such a screw has a particular angular condition only at the head, the distal portion therefore being conventional for its part, that is to say with the ridges of the screwthread being inscribed in a cylinder. Document EP 0 A1 describes for its part a screw which on this occasion is self-tapping and self-drilling but which, in order to do this, has bevels at the ends which on the other hand detracts from the grip of the screw or makes it necessary to sink it more deeply in order that the bone is at the level at which the screw is totally cylindrical.
Moreover, the proposed cutting ridges are too deep, fragile and therefore breakable at the barrel. The invention provides a remedy for all these drawbacks in a simple, reliable, effective and rational manner. To do this, the object of the present invention is to propose a screw that satisfies better than those formerly known the requirements of the practice notably in that it proposes a self-drilling and self-tapping, compressive screw allowing a good penetration and simultaneously ensuring a very good bone anchoring and does so without passing through the bone.
In the rest of the text, reference will be made to the following definitions: The two threaded zones, whether they be distal or proximal, for their part make it possible to achieve the bony anchorage, each of the two threads being self-drilling and self-tapping.
The invention is based on the idea of achieving in combination two anchoring zones biting into the bone when screwed in, one for the proximal portion and the other for the distal portion, with particular external profiles, namely slightly conical thinner on the distal side out of which the also conical threads are cut, both of them, at the distal end and at the proximal end, comprising several cutting ridges each made by a longitudinal cut in the screwthread.
Such an arrangement combined with ridges that are particularly cutting by reason of their formation by removal of material, allows the end to play a role of a punch which immediately catches hold and which makes it possible to place the screw without pre-drilling in a soft bone or with a slight punching in the bone in a harder bone, while having the same anchoring capacity as a screw with a purely cylindrical crest profile.
It is evident moreover that the fact that the ridges are obtained by removal of material and the fact that the profiles are specific and as described hereinabove surprisingly allow not only a good immediate penetration in the two portions of the bone, but also a good compression of the two portions of bone against one another and finally a good hold in the bone itself, and this is despite the conicity of the distal portion of the screw, and without passing through the bone.
The assembly can be anchored via the conventional manner of screws, after stabilization of the osteotomy by any appropriate instrument tongs or forceps and with the aid of an appropriate screwdriver, mounted on a pin tubular screw or not solidor a screw fitting making it possible to be connected to a motor.- Focuses on the key global Osteosynthesis Devices companies, to define, describe and analyze the sales volume, value, market share, market competition landscape and recent development.
- To project the value and sales volume of Osteosynthesis Devices submarkets, with respect to key regions. Total elbow arthroplasty for the treatment of reconstructible comminuted radial head fractures The authors concluded that additional studies must be conducted to further define the role of elbow HA for the treatment of complex fractures of the distal humerus.
often with persistence of pain with a stiff or unstable elbow.
|Spinal Osteosynthesis Unit Market Analysis||Residents need to fax us a letter from your residency director stating that you are in good standing, the year of your residency program and that you have permission to attend the course. Continuing Education Contact Hours This activity has been planned and implemented in accordance with the standards, requirements, and guidelines for approval of sponsors of continuing education in podiatric medicine through an affiliation of The Podiatry Institute and the American Academy of Foot and Ankle Osteosynthesis.|
|Indications for Use of Bone Plates||This article has been cited by other articles in PMC. Majority of C1 fractures can be effectively treated conservatively by immobilization or traction unless there is an injury to the transverse ligament.|
Osteosynthesis. Osteogenesis imperfecta (OI), also known as brittle bone disease, is a group of genetic disorders that mainly affect the bones. It results in bones that break easily. The severity may be mild to severe.
Request PDF on ResearchGate | Osteosynthesis and radiotherapy of the proximal femur: Report of 6 cases | Post-radiation shaft fractures of long bones are uncommon. Late or partial healing. Internal fixation is an operation in orthopedics that involves the surgical implementation of implants for the purpose of repairing a bone, a concept that dates to the mid-nineteenth century and was made applicable for routine treatment in the mid-twentieth century.
This meta-analysis compared clinical outcomes of arthroplasty vs. osteosynthesis for displaced femoral neck fractures.
Methods Meta-analysis was performed on the difference in revision rate and overall mortality between participants undergoing osteosynthesis vs. total hip arthroplasty (THA), osteosynthesis vs.
hemiarthroplasty (HA), or THA vs. HA.