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This research looks at how the spine, pelvis, and thighbone work together and how this affects hip problems and artificial hip stability. Chapter 1 explains how conditions like arthritis and femoroacetabular impingement (FAI) develop and how new 3D imaging helps analyze unstable hip implants.

Chapter 2 explores how the tilt of the sacrum (the base of the spine) affects the back, hips, and knees. A greater tilt can lead to knee arthritis and spine issues, while a smaller tilt is linked to hip arthritis. Chapter 3 finds that signs of FAI are common in people with hip or knee pain, and a lower pelvic tilt may increase the risk.

Chapter 4 studies differences in hip socket shape, especially in women, which is key for properly fitting hip implants. Chapter 5 looks at hip dislocation risks after surgery, which have dropped to 1.7% over the years but haven’t improved further. Chapters 6 and 7 examine how implant positioning affects stability and introduce a new measurement model. Chapter 8 confirms that certain implant positions and a high sacral tilt increase the risk of dislocation.

Chapters 9 and 10 test a new vitamin E-infused plastic for hip implants, which seems to wear down less over time. Chapter 11 compares two surgical techniques, showing that a side-entry approach causes more bone growth than a rear-entry one, but without major recovery differences. Finally, Chapter 12 highlights the need for more research on personalized hip surgeries and better implant positioning for longer-lasting, more successful hip replacements.