What is Paprosky classification?
The Paprosky classification is based on the anteroposterior (AP) pelvis radiograph. It uses four separate criteria to determine the classification: superior migration of the cup, the amount of ischial osteolysis, the amount of teardrop osteolysis, and the position of the cup relative to Kohler’s line.
What is pelvic discontinuity?
Pelvic discontinuity is a challenging complication encountered during revision total hip arthroplasty. Pelvic discontinuity is defined as a separation of the ilium superiorly from the ischiopubic segment inferiorly and is typically a chronic condition in failed total hip arthroplasties in the setting of bone loss.
What is acetabular reconstruction?
The purpose of the acetabular reconstruction is to obtain a stable, durable fixation of a new socket to reestablish the center of rotation and, if possible, restore bone stock.
What is acetabular cage?
The acetabular component is offloaded using a titanium cage which spans ischium to ilium and allows biological ingrowth and stabilisation of the hemispherical shell. A polyethylene liner is cemented inside the cage in the desired position.
What is Trunnionosis?
Abstract. Trunnionosis is defined as wear of the femoral head–neck interface and has recently been acknowledged as a growing cause of total hip arthroplasty failure. Some studies have reported that it accounts for up to 3 % of all revisions.
Is the acetabulum replaced in a hip replacement?
One or both parts may be replaced during surgery: The hip socket (a part of the pelvic bone called the acetabulum) The upper end of the thighbone (called the femoral head)
What causes acetabular Protrusio?
Protrusio can develop in association with metabolic bone diseases such as osteogenesis imperfecta, Marfan’s Syndrome, and Paget’s disease, inflammatory arthritis or osteoarthritis, tumors, or result from prior trauma.
How is acetabular Protrusio treated?
Causes of Secondary Protrusio Acetabuli (3) femoral neck-shaft angle.
What causes Trunnionosis?
The exact cause of trunnionosis is currently unknown; however, postulated etiologies include modular junction wear, corrosion damage, and metal ion release. Additionally, implant design and trunnion geometries may contribute to the progression of component failure.
What is the paprosky classification of acetabular defects?
Paprosky Classification of Acetabular Defects. The rim defect is usually located between the 10 o’clock and 2 o’clock positions. The medial wall of the acetabulum is present; therefore migration of the acetabular component is superolateral. Typically, the acetabular component has migrated more than 2 cm superiorly.
What are the different types of paprosky defects?
The Paprosky classification is divided into three types with increasingly severe degrees of bone loss; Types 2 and 3 are further divided into subtypes (Fig. 1). Type 1 defects have minimal focal bone loss with maintenance of the hemispheric shape of the acetabulum.
Is there a reliable acetabular bone defect classification system?
Reliability of acetabular bone defect classification systems in revision total hip arthroplasty. Principles of bone grafting in revision total hip arthroplasty: Acetabular technique . Results of total hip reconstruction using acetabular mesh in patients with central acetabular deficiency.
What are the three types of paprosky Classi ・ ation?
The Paprosky classi・…ation is divided into three types with increasingly severe degrees of bone loss; Types 2 and 3 are further divided into subtypes (Fig. 1). Type 1 defects have minimal focal bone loss with maintenance of the hemispheric shape of the acetabulum.