Biomaterial Database

Improving Spanning-Knee External Fixator Stiffness: A Biomechanical Study. 2016

Mihir J Desai, and William M Reisman, and William C Hutton

Vanderbilt University, Nashville, TN. mihir.j.desai@vanderbilt.edu.

The purpose of this study was to test and compare external fixator construct stiffness using pin-to-bar clamps or multipin clamps across 2 external fixation systems. Constructs were tested with 8-mm and 11-mm-diameter bar systems and pin-to-bar or multipin clamps. Three construct designs were tested: construct 1 with a single crossbar and pin-to-bar clamps, construct 2 with 2 crossbars and pin-to-bar clamps, and construct 3 with 2 crossbars and multipin clamps. The stiffness of each construct (N = 24) was tested using anterior-posterior bending. Two crossbars and pin-to-bar clamps resulted in the highest mean stiffness. Constructs with a single crossbar and pin-to-bar clamps had a similar average stiffness compared with constructs with 2 crossbars and multipin clamps. Pin-to-bar clamps with 2 crossbars result in stronger spanning-knee external fixators than constructs using multipin clamps.

UI	MeSH Term	Description	Entries
D007719	Knee Joint	A synovial hinge connection formed between the bones of the FEMUR; TIBIA; and PATELLA.	Superior Tibiofibular Joint,Joint, Knee,Joint, Superior Tibiofibular,Knee Joints,Superior Tibiofibular Joints,Tibiofibular Joint, Superior
D008422	Materials Testing	The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.	Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D008962	Models, Theoretical	Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.	Experimental Model,Experimental Models,Mathematical Model,Model, Experimental,Models (Theoretical),Models, Experimental,Models, Theoretic,Theoretical Study,Mathematical Models,Model (Theoretical),Model, Mathematical,Model, Theoretical,Models, Mathematical,Studies, Theoretical,Study, Theoretical,Theoretical Model,Theoretical Models,Theoretical Studies
D001858	Bone Nails	Rods of bone, metal, or other material used for fixation of the fragments or ends of fractured bones.	Bone Pins,Bone Nail,Bone Pin,Nail, Bone,Nails, Bone,Pin, Bone,Pins, Bone
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D005592	Fracture Fixation	The use of metallic devices inserted into or through bone to hold a fracture in a set position and alignment while it heals.	Skeletal Fixation,Fracture Reduction,Fixation, Fracture,Fixation, Skeletal,Fixations, Fracture,Fixations, Skeletal,Fracture Fixations,Fracture Reductions,Reduction, Fracture,Reductions, Fracture,Skeletal Fixations
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001696	Biomechanical Phenomena	The properties, processes, and behavior of biological systems under the action of mechanical forces.	Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D013525	Surgical Instruments	Hand-held tools or implements used by health professionals for the performance of surgical tasks.	Clamps, Surgical,Clips, Surgical,Clips, Tantalum,Forceps,Hooks, Surgical,Plugs, Surgical,Scissors, Surgical,Speculum,Surgical Clamps,Surgical Clips,Surgical Hooks,Surgical Plugs,Surgical Scissors,Surgical Valves,Trocar,Valves, Surgical,Clamp, Surgical,Clip, Surgical,Clips,Hook, Surgical,Instrument, Surgical,Plug, Surgical,Surgical Clamp,Surgical Clip,Surgical Hook,Surgical Plug,Surgical Valve,Valve, Surgical,Clip,Clip, Tantalum,Forcep,Instruments, Surgical,Speculums,Surgical Instrument,Tantalum Clip,Tantalum Clips,Trocars
D016267	External Fixators	External devices which hold wires or pins that are placed through one or both cortices of bone in order to hold the position of a fracture in proper alignment. These devices allow easy access to wounds, adjustment during the course of healing, and more functional use of the limbs involved.	Fixation Devices, External,Device, External Fixation,Devices, External Fixation,External Fixation Device,External Fixation Devices,External Fixator,Fixation Device, External,Fixator, External,Fixators, External