A dissertation presented in partial compliance with the requirements for the Master's Degree in Technology: Chiropractic, Durban Institute of Technology, 2005. / The paucity of clinical research into the cause of canine hip dysplasia, efficacy and effects of the different treatment protocols available for the management of symptoms, as well as the differing presentations, has led to a continued variation in standardized care for this condition. The aim of this study was to contribute further information on the use of instrument manipulation as an alternative or adjunctive means of managing the symptoms of canine hip dysplasia. Both manual and instrument manipulation have effectively been used in the short-term management of human musculoskeletal pconditions, it was hypothesized that the use of instrument manipulation would benefit the canine patient. The use of human based studies was a guideline, as no previous chiropractic studies have been conducted on the canine subject. / M

Thesis (M.Tech.: Chiropractic)- Dept. of Chiropractic, Durban Institute of Technology, 2005. xvii, 109 leaves : ill. ; 30 cm / The paucity of clinical research into the cause of canine hip dysplasia, efficacy and effects of the different treatment protocols available for the management of symptoms, as well as the differing presentations, has led to a continued variation in standardized care for this condition. The aim of this study was to contribute further information on the use of instrument manipulation as an alternative or adjunctive means of managing the symptoms of canine hip dysplasia. Both manual and instrument manipulation have effectively been used in the short-term management of human musculoskeletal pconditions, it was hypothesized that the use of instrument manipulation would benefit the canine patient. The use of human based studies was a guideline, as no previous chiropractic studies have been conducted on the canine subject.

Aseptic loosening of the components is probably the most common long-term complication resulting in failure of Total Hip Arthroplasty. The mechanical behaviour of bone under load is one of the contributory causes of loosening encountered at the prosthesis/cement/bone interface. The present study dealt with a series of invitro experiments conducted on epoxy resin models of human hemi-pelves with different commercially available acetabular components implanted in them. These are used for the construction of simplified models of the artificial hip joint (three-dimensional) and of the prosthesis/cement/bone acetabular interface (two-dimensional). Loading conditions for the models included tensioning of the simulated abductor muscles for the hemi-pelvic and femoral loading for the prosthesis/cement/bone interface study. The experimental method employed was real-time holographic interferometry, a stress analysis technique recently used in the biomechanical field, which permitted whole-field simultaneously inspection of deformation patterns. The holographic interferograms were interpreted in a qualitative rather than a quantitative manner. The models do not exactly represent the in-vivo situation. Since this study identified high stresses both in the hip bone as well as in the interface (prosthesis/bone) it is suggested that these stresses are implicated in the mechanical pathogenesis of loosening. The observed changes in stress levels detected in our models could serve as a guide for future designs of acetabular prostheses as well as guide a in surgical techniques.