Table of Contents
What is a Silastic implant?
Silastic implants are soft and inherently unstable when cantilevered and unsupported by bone, and thus are prone to shifting and/or bony resorption.
What is Silastic implant made of?
This implant relied on the viscoelastic properties of silicone to achieve dorsiflexion. Due to the early (within four years) and high failure rates (57%) of these implants,17 Swanson designed, in 1974, a double-stemmed hinge made of silicone elastomer (second-generation) to offer a constrained design.
What is a Silastic joint?
Silicon hemi-implants were introduced by Swanson in 1967 [1]. They were meant to create a joint spacer to replace the excised base of the proximal phalanx. Seven years later the double-stemmed hinged silastic implant was introduced [2] to replace the resected proximal phalangeal base and first metatarsal head.
What is MPJ arthroplasty?
The first MTP, also called the first metatarsophalangeal joint, is the big toe joint. A first MTP joint interposition arthroplasty is a surgical procedure to treat arthritis of the big toe. The treatment can stop pain at the base of the big toe by preventing the surfaces of the bones from rubbing together.
Is Silastic the same as silicone?
Silastic (a portmanteau of ‘silicone’ and ‘plastic’) is a trademark registered in 1948 by Dow Corning Corporation for flexible, inert silicone elastomer.
What is silastic tubing?
SILASTIC Rx Medical Grade Tubing is a translucent silicone extrusion made from SILASTIC BioMedical Grade Silicone Elastomer. SILASTIC BioMedical Grade Silicone Elastomer is utilized to assure that this product meets stringent biocompatibility standards.
How long do silicone toe joints last?
Previously, patients could undergo a silicone implant surgery, but that wasn’t always a successful surgical option. There are also various metal resurfacing options, but the treatment lasts five to 10 years and isn’t a long-term solution because the metal breaks down the bone and leaves a gap.
How long will Cartiva implant last?
Studies have confirmed the durability of Cartiva implants over a five-year period, with zero material failures reported.
Are there second stage silicone joint implants for first MTPJ?
However on deep tissue cultures, no growth was seen and the patient is awaiting revision into a second stage MTPJ fusion. Silicosis, bony over growth, osteolysis, implant fracture and transverse metatarsalgia have been reported with the use of the silicone first MTPJ implant.
How are silicone joint implants not a joint replacement procedure?
Silicone implants are an interpositional arthroplasty and act as a spacer. They are not a joint replacement procedure as such [5,9]. The implant gets encapsulated and forms a capsuloligamentous system to provide stability. As time goes on the joint becomes flexible and functions as a new joint.
Which is the most common silicone joint prosthesis?
Subsequently, titanium grommets were introduced to protect the hinged implants from bone damage [8]. This double-stemmed hinged silicone implant is still the most commonly used and accepted prosthesis with an increase in its utilisation recently [5,7].
What was the first prosthesis for the first MTPJ?
As surgeons started recognising the importance of the first metatarsophalangeal joint (MTPJ) in foot function and maintaining normal gait, interest emerged in developing a functional first MTPJ prosthesis. In 1952, Swanson designed a metal hemispherical cap with a tapered stem as a first metatarsal head replacement [1].