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Roentgen stereophotogrammetry (RSA) is a highly accurate technique for the assessment of three-dimensional migration and micromotion of a joint replacement prosthesis relative to the bone it is attached to. It was introduced in 1974 by Göran Selvik. [1]
Osteolysis has been reported to occur as early as 12 months after implantation and is usually progressive. This may require a revision surgery (replacement of the prosthesis). [citation needed] Although osteolysis itself is clinically asymptomatic, it can lead to implant loosening or bone breakage, which in turn causes serious medical problems. [2]
A bone scan or bone scintigraphy / s ɪ n ˈ t ɪ ɡ r ə f i / is a nuclear medicine imaging technique used to help diagnose and assess different bone diseases. These include cancer of the bone or metastasis , location of bone inflammation and fractures (that may not be visible in traditional X-ray images ), and bone infection (osteomyelitis).
The femoral, tibial and patellar components of a total knee replacement are fixed to the bone by using either cement or cementless total knee replacement implants. Cemented fixation is performed on the vast majority of total knee replacements. However, short-term trials suggest that there may be relief of pain.
Loosening of the components: the bond between the bone and the components or the cement may break down or fatigue. As a result, the component moves inside the bone, causing pain. Fragments of wear debris may cause an inflammatory reaction with bone absorption which can cause loosening. This phenomenon is known as osteolysis.
One variant of is the Stainsby procedure which consists of excision of part of a proximal phalanx in a metatarsophalangeal joint, reduction of the plantar plate and kirschner wire fixation of the metacarpal bone to the remaining phalanx. [1] Resurfacing arthroplasty, where one or both bone surfaces are trimmed and replaced with a smooth metal ...
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PJIs are the most common cause of knee replacement failures, and the third most common cause of hip replacement failures. [1] As of 2017, 2.1% of hip and 2.3% of knee replacements will at some time develop a PJI. [2] The incidence of PJIs have more than tripled in the last 20 years, with the incidence expected to further increase in the future.