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      <Desc>THE BIOMECHANICS OF CEMENTLESS AND CEMENTED FIXATION OF THE TIBIAL COMPONENT IN TOTAL KNEEREPLACEMENTTOTAL KNEE REPLACEMENTS CONSIST OF TWO MATING PROSTHETIC COMPONENTS THAT ARE FIXED TO THE FEMUR AND THE TIBIA. FIXATION OF THE TIBIAL COMPONENT OCCURS FAR MORE OFTEN THAN THE FEMORAL COMPONENT, IN PART, BECAUSE OF THE NONUNIFORMITY OF THE STRENGTH AND STIFFNESS OF THE BONE UPON WHICH THE IMPLANT IS MOUNTED, AND BECAUSE OF THE MOVEMENT OF THE APPLIED LOAD DURING FUNCTIONAL ACTIVITIES. BUILDING ON PROJECTS PERFORMED AT IORE IN PREVIOUS YEARS, WE HAVE DEVELOPED A SERIES OF LOADING ROUTINES IN WHICH COMPLEX CYCLIC LOADS ARE APPLIED TO CADAVERIC SPECIMENS IMPLANTED WITH ARTIFICIAL KNEES, SIMULATING THE DEMANDS OF ACTIVITIES COMMONLY PERFORMED IN NORMAL LIFE. DURING THESE LOADING ROUTINES WE EMPLOY SOPHISTICATED OPTICAL METHODS TO MEASURE THE RELATIVE MOTION OF THE BONE AND THE ADJACENT IMPLANT AS AN INDICATOR OF THE STABILITY OF FIXATION OF THE IMPLANTED KNEE.</Desc>
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        <Desc>IMPROVING THE OUTCOMES OF REVISION TOTAL KNEE REPLACEMENT.IN ATTEMPTING TO ADDRESS THIS DEFICIENCY, WE HAVE STARTED A RESEARCH PROGRAM FOCUSING ON IMPROVING THE QUALITY AND EFFECTIVENESS OF THE TRAINING RECEIVED BY SURGEONS SPECIALIZING IN JOINT REPLACEMENT. A DEVELOPED ONLINE SURVEY TO ASSESS THE DIFFICULTY OF ALL ASPECTS OF REVISION KNEE REPLACEMENT HAS BEEN VALIDATED. THE CONTINUATION AND DEVELOPMENT OF A NEW SYSTEM FOR CLASSIFYING THE QUALITY AND INTEGRITY OF THE BONE PRESENT DURING REVISION KNEE REPLACEMENT SURGERY TO INTRAOPERATIVE DECISIONMAKING, INCLUDING THE SELECTION OF THE APPROPRIATE FEMORAL AND TIBIAL IMPLANTS. DEVELOPMENT OF AN ACCURATE SURROGATE MODELS OF THE FEMUR AND THE TIBIA THAT REPRODUCE THE 3D MORPHOLOGY OF THE CORTICAL AND CANCELLOUS BONE REMAINING AFTER REMOVAL OF THE PRIMARY IMPLANTS DURING REVISION KNEE REPLACEMENT PROCEDURES. THESE MODELS WERE FABRICATED IN TWO FORMS TO SIMULATE THE TWO MOST COMMON PATTERNS OF RESIDUAL BONE SEEN AT SURGERY. THIS WAS UNDERTAKEN THROUGH AN ITERATIVE PROCESS THAT COMMENCED WITH A REVIEW OF PUBLISHED PHOTOGRAPHS OF THE FEMUR AND TIBIA AT REVISION TKR, AND WAS FURTHER REFINED THROUGH INDEPTH REVIEWS, IN COLLABORATION WITH HIGHLY EXPERIENCED SURGEONS, OF INITIAL PROTOTYPES OF EACH MODEL AND SUBSEQUENT MODIFICATIONS.</Desc>
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        <Desc>FACTORS CONTRIBUTING TO HIP ARTHRITIS THE LAXITY OF THE HIP JOINT CAPSULE.IORE HAS FUNDED AN ONGOING RESEARCH PROGRAM INVESTIGATING THE FUNDAMENTAL ROLE OF ANATOMIC STRUCTURES CONTROLLING THE MOTION OF THE HIP JOINT. THIS WORK IS MOTIVATED BY OUR INTEREST IN THE CAUSES OF HIP ARTHRITIS AND WAYS OF PREVENTING THIS CRIPPLING CONDITION. PREVIOUSLY, IT HAS BEEN HYPOTHESIZED THAT CHANGES IN THE SOFT TISSUES OF THE HIP THAT OCCUR WITH DISEASE OR INJURY LEAD TO CHANGES IN THE CENTERING OF THE HEAD OF THE FEMUR IN THE HIP SOCKET LEADING TO AREAS OF OVERLOAD AND, EVENTUALLY, ARTHRITIS. THESE EXPERIMENTAL PROCEDURES WERE REPEATED BEFORE AND AFTER MODIFICATIONS TO THE HIP CAPSULE, THE CONTINUOUS LIGAMENTOUS STRUCTURE ENCLOSING THE HIP JOINT. BY CALCULATING THE INCREASED SHIFT OF THE BONES WITHIN THE HIP JOINT IT WAS DEMONSTRATED THAT INCREASED MOTION AND "LOOSENESS" OF THE HIP ALSO LEADS TO INCREASED INSTABILITY AND MALTRACKING OF THE CARTILAGE SURFACES.</Desc>
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