What is Dorr classification?

What is Dorr classification?

The Dorr classification is a method of qualitative classification that is determined using anteroposterior and lateral plain radiographs of the hip joint. In our exploration of quantitative indices that are suitable for the Dorr classification, we found parameters that were easily measured on plain radiographs.

What is the difference between cemented and uncemented hip replacement?

Cemented and uncemented hip arthroplasties differ in how the prosthetic implant is fixed to the natural bone. A cemented hip arthroplasty relies on bone cement to fix the implants to the bone interface. Uncemented hip replacements rely on bone on-growth over specially designed implants.

What is bone cement implantation syndrome?

Bone cement implantation syndrome (BCIS) is characterized by hypoxia, hypotension or both and/or unexpected loss of consciousness occurring around the time of cementation, prosthesis insertion, reduction of the joint or, occasionally, limb tourniquet deflation in a patient undergoing cemented bone surgery.[1]

What is femoral offset?

Femoral offset: general remarks and definitions. Femoral offset is the distance from the center of rotation of the femoral head to a line bisecting the long axis of the femur (Fig. 1). This radiographic measurement should be accurately performed and varies according to the hip rotation.

What is Singh’s index?

The Singh Index (SI) is a simple, semiquantitative evaluation tool for diagnosing osteoporosis with plain radiographs [12]. The SI is based on the trabecular pattern of the proximal femur and classifies osteoporosis into six grades.

What is a Type A femur?

Type A indicates thick and distinct cortices seen on AP and lateral radiographs, creating a narrow diaphyseal canal and “funnel shape” of the proximal femur. The lateral radiograph shows a thick curved posterior cortex (fin).

What is the cement used in hip replacements?

Polymethyl methacrylate (PMMA), is commonly known as bone cement, and is widely used for implant fixation in various Orthopaedic and trauma surgery.

What is the latest hip replacement technique?

The latest advanced technology, a percutaneously-assisted “SUPERPATH™” approach, involves sparing the surrounding muscles and tendons when performing total hip replacement surgery. This technique builds a traditional hip implant in-place without cutting any muscles or tendons.

What is surgical cement?

Polymethyl methacrylate (PMMA), is commonly known as bone cement, and is widely used for implant fixation in various Orthopaedic and trauma surgery. In reality, “cement” is a misnomer because, the word cement is used to describe a substance that bonds two things together.

What is head-neck offset?

The head-neck offset ratio is the smaller difference between these 2 lines divided by the larger difference. R, right side (leftover from XRAY); A, the distance between the axis of the femoral neck and a parallel line at the level of the anterior contour of the femoral neck; B, the widest section of the femoral head.

What is offset in THA?

Background. Offset in THA correlates to abductor muscle function, wear, and impingement. Femoral offset after THA is not independent of the cup center of rotation (COR) so hip offset, a combination of femoral offset and change in hip COR, becomes the important measurement.

What is Calcar femoris?

The calcar femorale is a spur of thickened bone that lies deep to the lesser trochanter but posterior to the neutral axis of the femoral neck. The calcar is thickest medially where it joins the compression buttress of the neck and gradually thins as it passes laterally.

What are antiresorptive drugs?

Antiresorptive agents are bone preserving medications which can slow down the bone loss associated with osteoporosis (O’Neil et al. 2004). These reduce bone loss by inhibiting bone degeneration activity and/or promoting bone formation.

What is stress shielding effect?

Stress shielding refers to the reduction in bone density (osteopenia) as a result of removal of typical stress from the bone by an implant (for instance, the femoral component of a hip prosthesis).

What cement is used in knee replacement?

How long does a cemented hip last?

Assuming that estimates from national registries are less likely to be biased, patients and surgeons can expect a hip replacement to last 25 years in around 58% of patients.