Contractility hip refers to the ability of the muscles around the hip to contract and generate force. It is used as a concept in orthopedics, sports medicine, and physical therapy to describe hip muscle performance. Clinicians discuss it when evaluating hip pain, weakness, gait changes, and return-to-activity readiness. It may be assessed with hands-on exams or with measurement tools in clinics and research.

A Constrained liner hip is a specialized socket liner used in some total hip replacements. It is designed to “capture” the ball of the hip implant to reduce the chance of dislocation. It is most commonly used in revision hip surgery or complex primary cases with instability risk. It is one tool surgeons may choose when standard components do not provide enough stability.

Computer-assisted hip replacement is a way of performing total hip replacement using digital guidance during surgery. It combines traditional orthopedic techniques with navigation systems and/or robotic tools to help with implant positioning. It is most commonly used in hospitals and surgical centers that offer advanced joint replacement technology. It may be chosen for selected patients when surgeons want added intraoperative measurement and alignment feedback.

The Coccyx is the small bone at the very bottom of the spine. It is commonly called the tailbone. It sits just below the sacrum and forms the terminal end of the spinal column. In orthopedics, it is discussed most often when evaluating tailbone pain and sitting-related discomfort.

A Cobalt chrome head is a smooth, ball-shaped metal component used in some hip replacement implants. It typically attaches to the top of a femoral stem and forms the “ball” part of the hip’s ball-and-socket joint. It is most commonly discussed in total hip arthroplasty (total hip replacement) and hemiarthroplasty (partial hip replacement). It is designed to move against a liner or cup inside the pelvis to allow hip motion.

Clamshell exercise is a common hip-strengthening movement usually performed lying on your side. It focuses on the muscles that stabilize the pelvis and control hip rotation. Clinicians often include it in physical therapy plans for hip, knee, and some lower-back conditions. It is frequently used as a foundational exercise before progressing to more demanding tasks.

Clicking hip describes a felt, heard, or sometimes visible “click,” “snap,” or “pop” around the hip during movement. It can be painless, uncomfortable, or associated with sharp pain, depending on the cause. People often notice it when walking, standing from a chair, climbing stairs, or rotating the leg. Clinicians use the term as a symptom description that helps guide a focused hip evaluation.

Closed reduction hip dislocation is a non-surgical way to put a dislocated hip back into place. It uses careful positioning and manual force to move the femoral head back into the socket. It is commonly performed in emergency and hospital settings after trauma or after a hip replacement dislocates. It is usually done with pain control and sedation or anesthesia so muscles can relax.

Chondrolabral separation is a finding in the hip joint where the labrum pulls away from the adjacent articular cartilage at their junction. It is often discussed as a type of labral injury and a marker of damage at the edge of the hip socket. Clinicians use the term in hip pain workups, especially when femoroacetabular impingement (FAI) or a labral tear is suspected. It can be described on imaging or confirmed during hip arthroscopy.

The Chondrolabral junction is the transition area where joint cartilage meets the labrum. In the hip, it sits along the rim of the socket (acetabulum). Clinicians use the term to describe a key anatomic landmark and a common site of injury. It is frequently discussed in hip imaging and hip arthroscopy reports.