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Extremity trauma
Published in Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie, Bailey & Love's Short Practice of Surgery, 2018
Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie
Plates and screws can be used in many different ways. A ‘lag screw' can be used to generate compression across a fracture site, optimising the environment for direct bone healing. Similarly, compression can be achieved using a dynamic compression plate. A plate might also be used simply to neutralise forces, buttress a fracture or work as an internal external fixator (see Figure28.11).
Design approaches and challenges for biodegradable bone implants: a review
Published in Expert Review of Medical Devices, 2021
Conventionally, NB type implants used for orthopedic applications have relied on dynamic compression plate (DCP), limited-contact dynamic compression plate (LC-DCP), locking compression plate (LCP) or (LC-LCP), and so on; and screws like V-shaped, buttress-threaded, and so on. Some of the plates and screws are shown in Figure 1. DCP, LC-DCP, and LCP have already been quite successful and very popular in biomedical engineering [13]. These plate designs have been successfully used for NB materials like stainless steel, Ti-alloys etc., but may not be suitable for biodegradable materials [14,15]. Screws made up of NB materials have also been investigated, although not a great deal of research findings appear to be available for biodegradable metallic materials [16]. Existing developed biodegradable materials have less mechanical strength than NB materials, although biodegradation behavior and biocompatibility have been found to be superior [9,17]. Appropriate biodegradable implant designs are certainly needed to modify and improve the conventionally available implant designs.