Regulation Of Key Pathways Causing Peri-implant Bone Loss.
Funder
National Health and Medical Research Council
Funding Amount
$403,639.00
Summary
The failure of bone prostheses is becoming a major health problem in our aging population. Despite the impressive success of joint replacement surgery, a significant number of arthroplasties fail. It is now apparent that most implants fail due to bone loss around them which leads to loosening. This project aims to obtain a better understanding of the causes of implant failure and find ways to extend the life of these implants .
Footwear For Self-managing Knee Osteoarthritis Symptoms: The Footstep Trial
Funder
National Health and Medical Research Council
Funding Amount
$590,532.00
Summary
Self-management of symptoms is an important part of treatment for people with knee osteoarthritis. Footwear influences forces across the knee joint and it is unclear which types of shoes are best to minimise arthritis symptoms. This study will compare the effects of flat flexible shoes to stable supportive shoe styles on pain and physical function over 6 months in people with painful knee osteoarthritis.
Addressing Evidence Gaps And Developing A Novel Treatment To Reduce The Burden Of Post-traumatic Knee Osteoarthritis
Funder
National Health and Medical Research Council
Funding Amount
$645,205.00
Summary
Arthritis caused by knee injury has a devastating personal and economic impact. Research is needed to develop strategies to prevent arthritis and improve outcomes for people living with arthritis. This research will improve treatment of knee injury to reduce arthritis risk, understand why some people are more likely to get knee arthritis, and develop a new treatment to improve outcomes for people living with knee arthritis. A clinical trial will determine if this treatment achieves this aim.
Maximum Acceptable Risk Of Complication In Total Knee Arthroplasty (MARKA) Study: Using Discreet Choice Experiments To Elicit Patient And Surgeon Perception Of Acceptable Risk In Total Knee Arthroplasty
Funder
National Health and Medical Research Council
Funding Amount
$465,199.00
Summary
Patient expectation is the strongest predictor of satisfaction following total knee replacement. Dissatisfaction with surgery is reported in approximately 1 in 5 patients undergoing knee replacement. Unrealistic patient expectations and uninformed perceptions of potential benefits, risks and limitations of surgery lead to dissatisfaction in many cases. This study will examine the “risk-benefit” preferences in patients and surgeons considering total knee replacement as a treatment option for end- ....Patient expectation is the strongest predictor of satisfaction following total knee replacement. Dissatisfaction with surgery is reported in approximately 1 in 5 patients undergoing knee replacement. Unrealistic patient expectations and uninformed perceptions of potential benefits, risks and limitations of surgery lead to dissatisfaction in many cases. This study will examine the “risk-benefit” preferences in patients and surgeons considering total knee replacement as a treatment option for end-stage osteoarthritis.Read moreRead less
Impaired Bone Remodelling Leads To Failure Of Orthopaedic Prostheses
Funder
National Health and Medical Research Council
Funding Amount
$515,917.00
Summary
The failure of bone prostheses is becoming a major health problem. More than 26,000 hip, and an equal number of knee, replacements were performed in Australia in 2002 with the number increasing between 5%-10% each year for the previous 10 years. Disturbingly, the incidence of revision hip surgery in Australia is now more than 15%, meaning that, despite the impressive success of joint replacement surgery, a significant number of arthroplasties fail. It is becoming more common for young, active in ....The failure of bone prostheses is becoming a major health problem. More than 26,000 hip, and an equal number of knee, replacements were performed in Australia in 2002 with the number increasing between 5%-10% each year for the previous 10 years. Disturbingly, the incidence of revision hip surgery in Australia is now more than 15%, meaning that, despite the impressive success of joint replacement surgery, a significant number of arthroplasties fail. It is becoming more common for young, active individuals to receive joint replacement surgery to improve their quality of life. This, combined with increasing life expectancy, and the known higher rate of failure of joint replacements in younger patients, means that the morbidity of a failed replacement, and the mobidity and associated mortality of revision surgery, will become an increasingly important health issue, with a major impact upon health budgets. The overwhelming majority of hip and knee prostheses have metal or ceramic on polyethylene bearing surfaces. It is now apparent that most implants fail due to bone loss around them leading to loosening, and evidence is accumulating that polyethylene wear particles are a major contributing factor to this process. It is therefore vital that we obtain better understanding of the causes of implant failure in order to extend the life of these implants and this project is designed to do so.Read moreRead less
A Randomised Controlled Trial Of Exercise Programs For Preventing Knee Injuries
Funder
National Health and Medical Research Council
Funding Amount
$1,160,491.00
Summary
The promotion of physical activity, either through organised sport or active recreation, is a key public health strategy in this country. However, there is a risk of injury during this participation and efforts need to be undertaken to reduce this risk so that spor is safe for all. Sports injury prevention efforts to date in Australia have been severely hampered by a lack of evidence supporting currently advocated countermeasures. This concern has been recognised by both the NHMRC and the Common ....The promotion of physical activity, either through organised sport or active recreation, is a key public health strategy in this country. However, there is a risk of injury during this participation and efforts need to be undertaken to reduce this risk so that spor is safe for all. Sports injury prevention efforts to date in Australia have been severely hampered by a lack of evidence supporting currently advocated countermeasures. This concern has been recognised by both the NHMRC and the Commonwealth Department of Health and Ageing. It is imperative that we formally evaluate the effectiveness of sports injury countermeasures in the context of broad community level participation in sport, in contrast to previous research focussed on professional sport, and begin to deliver the preventive measures to the community. Australian football is a popular sport throughout Australia and it is associated with more medically-treated injuries than any other sport. Knee injuries are particularly common and can have severe consequences. One of the most commonly recommended knee injury prevention strategies is a well-designed exercise training program. Despite their potential to significantly reduce injury rates, the effectiveness of exercise training programs to prevent knee injuries in football, and indeed in most other sports, has not previously been assessed but has been identified as a priority research area by the NHMRC. This project will determine the effectiveness of exercise training programs for preventing knee injuries in community-level football players by monitoring injury rates, player behaviours and player attitudes before and after the training programs are implemented.Read moreRead less
Determination Of Irradiation Dose Efficacy For Use In Impaction Grafting At Revision Joint Replacement
Funder
National Health and Medical Research Council
Funding Amount
$411,517.00
Summary
Primary hip replacement is a successful intervention for hip disease, but 10-15% of hip prostheses fail and require revision surgery within 10-15 years. At the time of revision, significant bone loss around the failed prosthesis is not uncommon. A bone reconstruction procedure, called impaction grafting, where donor bone is minced and placed in the areas of deficient bone before implanting the new prosthesis, has shown to give good results at more than ten years in some centres. A high incidence ....Primary hip replacement is a successful intervention for hip disease, but 10-15% of hip prostheses fail and require revision surgery within 10-15 years. At the time of revision, significant bone loss around the failed prosthesis is not uncommon. A bone reconstruction procedure, called impaction grafting, where donor bone is minced and placed in the areas of deficient bone before implanting the new prosthesis, has shown to give good results at more than ten years in some centres. A high incidence of early complications of this procedure have included loss of fixation within the bone. Fracture of the bone around prostheses has also reported in some centres. These events require more surgery, putting the patient at higher risk greater complications and longer rehabilitations. Recent improvements in surgical technique and donor bone preparation have improved results. A current debate questions whether the dose of irradiation can be reduced from 25 kGy, while maintaining sterility of allografts. The risk of bacterial contamination in allografts is low, and irradiation reduces the mechanical strength of the graft, contributing to complications when irradiated bone is used. The benefits of decontaminating the bone may be outweighed by the higher risk for failure due to poor bone quality and resulting prosthesis instability. We will use ISO standards to test the validity of radiation dose for sterilising bone ex vivo. In the absence of controlled human studies, our aim is also to compare the results of impaction grafting with non-irradiated bone versus bone irradiated at current doses used by Australian bone banks, and lower doses indicated by ex vivo testing. We will use a large animal model of revision hip replacement, with precise measures of prosthesis stability. The results of this study will guide clinical decisions regarding the efficacy of current bone graft preparation procedures and the use of irradiated bone in human hip replacement surgery.Read moreRead less
Radiostereometric Analysis Of The Effect Of A Large Articulation On Prosthetic Wear And Migration After Hip Replacement
Funder
National Health and Medical Research Council
Funding Amount
$192,186.00
Summary
At total hip replacement, there has been a recent trend to use prostheses with a larger ball and liner in the socket. This may decrease the risk of post-operative dislocation, but may also increase the amount of wear, leading to bone loss and loosening of prostheses, which may then require replacement. This project will use a special type of x-ray to determine whether wear and movement of these new prostheses is clinically acceptable, so that they can be used with confidence in patients.