Locking plates have replaced dynamic compression plates in human orthopaedic surgery as they offer significant biomechanical and biological advantages over standard compression plates. Implants like lcdcp and more recently the locking compression plate helps to. The stiffness of 1mm fracture gap models and that of intact femoral model were in the range. Different types of screws conventional screws cortex screw with or without shaft cancellous bone screw with or without shaft locking head screws lhs selftapping lhs selfdrilling, selftapping lhs 5. Development of the locking compression plate injury. If a locking screw is used, the screw can then be locked into the plate in a single step. Comparison study of the clinical effect and biomechanics. Mechanics of the locking compression plate technology and forces generated as a result 12 where, f1 force to tighten the screw into a bone, f2 reaction force developed because of force f1, f3 friction force between the plate. Length a457000014 14 mm a457000016 16 mm a457000018 18 mm a457000020 20 mm a457000022 22 mm a457000024 24 mm a457000026 26 mm a457000028 28 mm a457000030 30 mm a457000032 32 mm a457000034 34 mm. The locking compression plate lcp is a new screw plate system that offers the possibility of inserting conventional and locking head screws into the specially designed combination holes. There are multiple locking plate systems available in the veterinary market including several. In addition, self locking fasteners also decrease the tendency of the fastener to fatigue by reducing the vibration transferred to the fastener.
Every screw hole in the variax 2 foot plate except the. This surgical technique applies to the depuy synthes lcp locking compression plate systems and product lines listed below, which include but are not limited to the following indications. Volar fixation of dorsally displaced distal radial fracture using. The combi holes in the lcp plate shaft combine a dynamic compression unit dcu hole with a locking screw hole. Large fragment locking compression plate lcp technique. Biomechanical property of a newly designed assembly. The synthes locking compression plate lcp is part of a stainless steel and titanium plate and screw system that merges locking screw technology with conventional plating techniques. Pdf overview of the locking compression plate and its clinical.
Concerning the aoclassification most fractures were type a. The desired length and rotation of the digit was determined. Pdf basic principle of the locking compression plate. A failure study of a locking compression plate implant. Fixation is possible with conventional screws with a compression option, selfdrilling and selftapping monocortical or selftapping bicortical locking head screws. Fracture repair has taken a major step forward with the geriatric fracture centers adoption of locking compression plates as the standard treatment for broken bones. Research article biomechanical property of a newly designed assembly locking compression plate. An orthopedic plate is a form of internal fixation used in orthopaedic surgery to hold fractures in place to allow bone healing. Effectiveness of locking versus dynamic compression plates. Compression and locking in one step compression can be achieved when a screw is inserted and tightened into an oval compression hole. Results of locking compression plate fixation in distal. All surgical techniques are available as pdf files at. The proximal portion of the plate was secured initially with a locking ao 2 mm locking compression plate for. Self locking fasteners resist rotation on the first installation and on subsequent installations and removals.
Download free acrobat reader dc software, the only pdf viewer that lets you read, search, print, and interact with virtually any type of pdf file. Locking compression plates, available in a straight and anatomically. Three different thicknesses of the plate, in various lengths, are available. Ao 2mm locking compression plate for arthrodesis of the. The surface of implants that contact the body might be made of a biomedical material such as titanium, silicone. Threedimensional finite element analysis jiangjun zhou,1 min zhao,1 da liu,2 haiying liu,3 and chengfei du3 1department of orthopedics, the 184th hospital of pla, spinal surgery treatment center of nanjing military region, yingtan, jiangxi province 335000, china. Locking plates and their place in fracture surgery. In this case study a failed locking compression plate was investigated. Locking screw with selftapping flutes less surgical steps cortical thread with large core. The standard sps plate cannot be locked, and therefore should not be used with locking screws, locking inserts, or cable plugs.
If a fracture is poorly reduced this alignment will persist after application of the locking plate. Inthisarticle,wereportthesuccessful use of the anatomicallycontoured lcp metaphyseal plate as external fixation in seven adult patients for acute or chronic posttraumatic problems in the midshaft. Metaphyseal locking compression plate as an external. This study aimed to evaluate the outcome of using a locking compression plate lcp as a definitive external fixator in the management of infected nonunion of the humeral diaphysis after failure of internal fixation. Pdf the locking compression plate lcp system offers a number of advantages in fracture fixation combining. In the modern world with increase in speed and fast moving vechicles, there has been a continous upsurge in the number as well as the severity of high energy fractures. Axsos plate hole from a compression mode to an locked mode is shown in figs. Only with adobe acrobat reader you can view, sign, collect and track feedback, and share pdfs for.
Stabilization system liss 6 and the locking compression plate lcp 7 with all its versions. Comparison study of the clinical effect and biomechanics between locking compression plate and interlocking intramedullary nail for humerus shaft fracture. Lcp reflects the multilateral collaboration of clini cians, researchers, developers and industry. Locking compression plate lcp dynamic compression unit conical and threaded unit 4. This study was conducted to examine the short term results, early complications and healing rate of distal femoral fractures treated with the distal femoral locking compression plate. The common alternatives jam nuts, cotter pins, lock nuts, lock washers and similar. Large fragment locking compression plate lcp system. Locked compression plate lcp whereby the latter implant o. Infected nonunion of the humeral diaphysis is a challenging problem for orthopedic surgeons. Pre basic courseplates form and functiondr sudarshan bhandary 2. Biomechanics and clinical application principles of. A locking compression plate as an external fixator for.
Clinical study locking compression plate in distal femoral. Methods a total of 205 patients who were scheduled for implant removal surgery after a healed fracture of the femur, tibia, humerus, distal radius, or clavicle in nine austrian clinics were prospectively included in the study. Locking plate technology geriatric fracture center. Conventional plate osteosynthesis seeks to obtain maximum stability with a rigid plate and if possible compression of the fracture fragments. The failure rate of locking compression plate is low, and there is little. The authors then present the advantages of locking plates in fixation of periprosthetic fractures. Distal femoral locking compression plate dflcp has a smaller application device and allows both locking and compression screw fixation of the femur shaft. Principles and clinical application of the locking. It consists of the carpus, distal ulna and distal radius. Locking compression plate lcp implants are intended for temporary. He shengwei1,2, qinruixian 1, li bin3, du guangyu 2, sun chuanxiu 2, sun xuegang 2, binzhi chen1 1school of traffic and transportation engineering, dalian jiaotong university, pr china.
Poor bone quality, common in older adults, increases the technical difficulty and complications of. Basic principles and techniques of internal fixation of. Article information, pdf download for volar fixation of dorsally displaced distal radial. Locking plates are generally less rigid than conventional plates. Plate design eccentric drilling away from fracture. The plate was secured with a combination of standard screws and locking 2 mm screws. Kirankumar,gauravsharma,kamranfarooque,vijaysharma,ratnavratan, sanjayyadav,anddevendralakhotia department of orthopaedics, aiims, new delhi, india correspondence should be addressed to vijay sharma. Locking plate fixation, on the other hand, seeks to maintain a certain elasticity to stimulate bone healing. Locking plate technology fracture repair has taken a major step forward.
Surgical technique lcp locking compression plate depuy synthes 1 table of contents introduction lcp locking compression plate 2 lcp metaphyseal plates 4. Proximal femoral locking compression plate for proximal femoral. The locking compression plate system has many similarities to conventional plate fixation methods, but with a few important improvements. Fractures of the distal radius are the most common fractures in the human body. The clinical successes of these plates led to the introduction of the locked compression plate synthes17,18 and a recent proliferation of lockedplate designs. Pdf role of locking compression plate in long bone. Th e locking head screws of those implants are designed to lock tightly in the plate figure 2. Orthopedics this study compares the results of the locking compression plate lcp and the dynamic compression plate dcp in the treatment. Recently we coined the term supercutaneous plating using a locking compression plate lcp as an external fixator. Polyaxial locking smartlock technology goes one step further. The screws cannot be used to pull in the bone or fragments to achieve reduction as can be done with conventional plates. Clavicle nonunion and plate breakage after locking compression.
The principle of the locking compression plate lcp is represented by the combination of two completely different anchorage technologies and two opposed principles of osteosynthesis in one implant it combines the principles of conventional plate osteosynthesis for direct anatomical reduction with those of bridging plate osteosynthesis. An implant is a medical device manufactured to replace a missing biological structure, support a damaged biological structure, or enhance an existing biological structure. Luoa a orthopaedic department, 6th peoples hospital af. The use of this technique in periarticular areas is facilitated by the development of anatomical plates with various screw sizes. Axsos compression plates or sps compression plates the axsos compression plate should not be confused with the sps compression plate. To avoid contact with flexor tendons, the plate must be applied just proximal to and below the watershed line. A failure study of a locking compression plate implant sciencedirect. Medical implants are manmade devices, in contrast to a transplant, which is a transplanted biomedical tissue. A comparison of proximal femoral locking compression.
Pdf locking compression plate loosening and plate breakage. Technical complications during removal of locking screws. Large fragment locking compression plate lcp system locking screw features plate s features locking screw with torx drive recess the torx drive recess provides improved torque transmission to the screw and minimizes the possibility of cross thread. The plate contours in the periloc system were determined by studying a large collection of cadaveric specimens at the cleveland. Veterinary orthopedic implants over 27 years of delivering the widest selection of veterinary orthopedic implants, power equipment and instruments with unparalleled customer service. Clinical study locking compression plate in distal femoral intraarticular fractures.
1159 1205 512 805 1298 396 398 39 1457 476 1341 786 1335 248 162 1018 823 529 195 1045 1081 968 1642 41 365 1136 1132 1052 1607 1603 1384 511 1449 786 600 1279 1533 1257 1153 1338 788 1298 1344 1303 1291 1188 744 1026