Periprosthetic acetabular fracture means a break in the hip socket bone around a hip replacement cup. It can happen during hip replacement surgery or after surgery, sometimes after a fall or with weaker bone. Clinicians use this term when evaluating hip pain, loss of function, or implant instability in a replaced hip. It is commonly discussed in total hip arthroplasty (THA) follow-up and revision planning.

Periacetabular osteotomy is a hip-preserving surgical procedure that reshapes how the hip socket covers the femoral head. It is most commonly used for symptomatic hip dysplasia, where the socket is too shallow or misoriented. The goal is to improve joint mechanics and reduce abnormal load on cartilage and the labrum. It is typically performed by orthopedic surgeons with specialized training in young adult hip conditions.

Pelvic tilt abnormality describes a pelvis position that is tilted more than expected for a person’s posture and movement. It is most often discussed as an *anterior* (forward) or *posterior* (backward) tilt, but side-to-side tilt and rotation also matter. Clinicians use the term when evaluating hip pain, low back pain, posture, gait, and “hip–spine” mechanics. It is a descriptive finding, not a diagnosis by itself.

Pelvic tilt describes how the pelvis is angled in space. It is commonly discussed in posture, gait, low back pain, and hip conditions. Clinicians use it to describe alignment between the pelvis, spine, and legs. It is also used in imaging and surgical planning to interpret pelvic orientation.

Pelvic stabilization is a set of methods used to improve how the pelvis stays aligned and controlled during movement and load-bearing. It can involve exercise-based muscle control, external supports (like belts or taping), or surgical fixation in certain injuries. It is commonly discussed in hip, sacroiliac (SI) joint, low back, sports, postpartum, and trauma care. The goal is usually to reduce painful or inefficient motion and improve force transfer between the spine and legs.

Pelvic ring fracture is a break involving the bony “ring” of the pelvis. It usually refers to injuries of the pubic rami, sacrum, sacroiliac joints, or related pelvic bones. It is most commonly discussed in emergency care, trauma surgery, and orthopedic practice. It can range from a stable crack to an unstable injury affecting walking, posture, and blood loss risk.

Pelvic outlet is the lower opening of the bony pelvis. It is an anatomic term used to describe where the pelvis transitions to the perineum (the area beneath the pelvis). Clinicians use it in anatomy, pelvic trauma, imaging interpretation, and pelvic floor discussions. It is also used in radiology as part of “outlet views” that help assess pelvic ring alignment.

Pelvic obliquity is an uneven leveling of the pelvis, where one side sits higher than the other. It is usually described in the “frontal plane,” like a tilt side-to-side when viewed from the front. Clinicians use the term when assessing posture, gait (walking pattern), hip alignment, and spine-hip relationships. It is commonly discussed in orthopedics, physical therapy, sports medicine, and radiology reports.

Pelvic obliquity means the pelvis is tilted so one side sits higher than the other. It describes a side-to-side (coronal plane) asymmetry rather than a forward/backward tilt. Clinicians use it when evaluating posture, gait, hip and low-back symptoms, and leg length concerns. It is a finding or measurement, not a diagnosis by itself.

Pelvic insufficiency fracture is a type of stress fracture that happens when weakened pelvic bone cracks under everyday forces. It is most often discussed in the context of osteoporosis and low-energy hip, groin, or buttock pain. Clinicians use the term to describe fractures that occur without a major fall or high-impact injury. It commonly comes up in orthopedic, sports medicine, radiology, and physical therapy settings during evaluation of unexplained pelvic-region pain.