A failure study of a locking compression plate implant. The plate was secured with a combination of standard screws and locking 2 mm screws. To avoid contact with flexor tendons, the plate must be applied just proximal to and below the watershed line. Effectiveness of locking versus dynamic compression plates. 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. Locking plates have replaced dynamic compression plates in human orthopaedic surgery as they offer significant biomechanical and biological advantages over standard compression plates. Pdf role of locking compression plate in long bone. Pdf overview of the locking compression plate and its clinical.
Axsos plate hole from a compression mode to an locked mode is shown in figs. In this case study a failed locking compression plate was investigated. Technical complications during removal of locking screws. Compression and locking in one step compression can be achieved when a screw is inserted and tightened into an oval compression hole. Ao 2mm locking compression plate for arthrodesis of the. Comparison study of the clinical effect and biomechanics. There are multiple locking plate systems available in the veterinary market including several. Basic principles and techniques of internal fixation of. 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.
Stabilization system liss 6 and the locking compression plate lcp 7 with all its versions. An orthopedic plate is a form of internal fixation used in orthopaedic surgery to hold fractures in place to allow bone healing. Biomechanics and clinical application principles of. In addition, self locking fasteners also decrease the tendency of the fastener to fatigue by reducing the vibration transferred to the fastener. 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. Concerning the aoclassification most fractures were type a. Locked compression plate lcp whereby the latter implant o. The locking compression plate system has many similarities to conventional plate fixation methods, but with a few important improvements.
Large fragment locking compression plate lcp system. Stiffness and endurance of a locking compression plate fixed on. Orthopedics this study compares the results of the locking compression plate lcp and the dynamic compression plate dcp in the treatment. Poor bone quality, common in older adults, increases the technical difficulty and complications of. Locking screw with selftapping flutes less surgical steps cortical thread with large core. Every screw hole in the variax 2 foot plate except the. Form and function to understand how changes in the design of plates has evolved to meet the needs of the patient to understand how you can use a plate in several different ways to achieve different types of fixation. The common alternatives jam nuts, cotter pins, lock nuts, lock washers and similar. 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. 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. The use of this technique in periarticular areas is facilitated by the development of anatomical plates with various screw sizes. The desired length and rotation of the digit was determined. Implants like lcdcp and more recently the locking compression plate helps to.
Clinical study locking compression plate in distal femoral. The authors then present the advantages of locking plates in fixation of periprosthetic fractures. 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. All surgical techniques are available as pdf files at. Locking compression plate lcp dynamic compression unit conical and threaded unit 4. Research article biomechanical property of a newly designed assembly locking compression plate. Luoa a orthopaedic department, 6th peoples hospital af. Article information, pdf download for volar fixation of dorsally displaced distal radial. Locking plates and their place in fracture surgery. Results of locking compression plate fixation in distal. Comparison study of the clinical effect and biomechanics between locking compression plate and interlocking intramedullary nail for humerus shaft fracture. 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.
Conventional plate osteosynthesis seeks to obtain maximum stability with a rigid plate and if possible compression of the fracture fragments. 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. Veterinary orthopedic implants over 27 years of delivering the widest selection of veterinary orthopedic implants, power equipment and instruments with unparalleled customer service. Locking plates are generally less rigid than conventional plates. Infected nonunion of the humeral diaphysis is a challenging problem for orthopedic surgeons. The combi holes in the lcp plate shaft combine a dynamic compression unit dcu hole with a locking screw hole. Only with adobe acrobat reader you can view, sign, collect and track feedback, and share pdfs for. 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. 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. 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. 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.
Pre basic courseplates form and functiondr sudarshan bhandary 2. The plate contours in the periloc system were determined by studying a large collection of cadaveric specimens at the cleveland. Medical implants are manmade devices, in contrast to a transplant, which is a transplanted biomedical tissue. Locking compression plate lcp implants are intended for temporary. It consists of the carpus, distal ulna and distal radius. If a fracture is poorly reduced this alignment will persist after application of the locking plate. Proximal femoral locking compression plate for proximal femoral. A comparison of proximal femoral locking compression. 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. Locking plate fixation, on the other hand, seeks to maintain a certain elasticity to stimulate bone healing. Plate design eccentric drilling away from fracture.
Surgical technique lcp locking compression plate depuy synthes 1 table of contents introduction lcp locking compression plate 2 lcp metaphyseal plates 4. Locking plate technology geriatric fracture center. The screws cannot be used to pull in the bone or fragments to achieve reduction as can be done with conventional plates. Development of the locking compression plate injury. Fractures of the distal radius are the most common fractures in the human body. 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. Axsos compression plates or sps compression plates the axsos compression plate should not be confused with the sps compression plate. Locking compression plates, available in a straight and anatomically. 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. 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. Lcp reflects the multilateral collaboration of clini cians, researchers, developers and industry. Volar fixation of dorsally displaced distal radial fracture using. The failure rate of locking compression plate is low, and there is little.
Locking plate technology fracture repair has taken a major step forward. 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. Clinical study locking compression plate in distal femoral intraarticular fractures. Large fragment locking compression plate lcp technique. Th e locking head screws of those implants are designed to lock tightly in the plate figure 2.
A locking compression plate as an external fixator for. Biomechanical property of a newly designed assembly. Indication specific compression plates designed to match the contour of the bone to facilitate fusion or. A failure study of a locking compression plate implant sciencedirect. Fixation is possible with conventional screws with a compression option, selfdrilling and selftapping monocortical or selftapping bicortical locking head screws. The standard sps plate cannot be locked, and therefore should not be used with locking screws, locking inserts, or cable plugs. The proximal portion of the plate was secured initially with a locking ao 2 mm locking compression plate for. If a locking screw is used, the screw can then be locked into the plate in a single step. Kirankumar,gauravsharma,kamranfarooque,vijaysharma,ratnavratan, sanjayyadav,anddevendralakhotia department of orthopaedics, aiims, new delhi, india correspondence should be addressed to vijay sharma.
Recently we coined the term supercutaneous plating using a locking compression plate lcp as an external fixator. Clavicle nonunion and plate breakage after locking compression. Using the appropriate scale of the depth gauge, measure and then insert a 3. The stiffness of 1mm fracture gap models and that of intact femoral model were in the range. Polyaxial locking smartlock technology goes one step further.
Pdf the locking compression plate lcp system offers a number of advantages in fracture fixation combining. The clinical successes of these plates led to the introduction of the locked compression plate synthes17,18 and a recent proliferation of lockedplate designs. Volar locking compression plating is a safe and effective treatment for. Pdf basic principle of the locking compression plate. The surface of implants that contact the body might be made of a biomedical material such as titanium, silicone. Pdf locking compression plate loosening and plate breakage. Metaphyseal locking compression plate as an external.
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