Fortunately, pain following THA is a rare. However, over the lifetime of a THA, patients can experience discomfort. Causes of a painful THA are either intrinsic or extrinsic. Intrinsic etiologies originate from the hip joint itself, while extrinsic causes originate from the soft tissues around the hip.

Radiographic inclination is the angle between the longitudinal axis of the body and the acetabular axis when projected onto the coronal plane

Radiographic anteversion is the angle between the acetabular axis and the coronal plane

 Operative inclination is the angle between the acetabular axis and the sagittal plane

Operative anteversion is the angle between the longitudinal axis of the patient and the  Acetabular axis when projected onto the sagittal plane

 Anatomic inclination is the angle between the acetabular axis and the longitudinal axis of the body

Anatomic anteversion is the angle between the acetabular axis and the transverse axis of the body when the acetabular axis is projected onto the transverse plane