The MITCH hip resurfacing system is a metal on metal hip resurfacing device manufactured by Finsbury for Stryker. The bearing is a high precision ‘as cast’ high carbon cobalt chrome bearing. Finsbury has experience of hip resurfacing systems and markets its own system (the ADEPT...

The MS-30 (Morscher-Spotorno) femoral stem from Zimmer is a cemented, collarless stem which is available in both matt and highly polised versions. Design features include three tapers and a rounded trapezoidal cross section. The purpose of the flange on the lateral aspect of the stem is to...

The Novae Dual Mobility Cup is designed to reduce the risk of dislocation in patients at high risk including those with a history of dislocation, revision surgery and major tumour resection. Socket options include cemented (the "Stick"), uncemented with an HA coating (the "...

The Pinnacle Acetabular Cup System from Depuy comprises a 180 degree titanium shell with coating options including Porocoat (titanium sintered beads) Duofix (Porocoat with an HA coating) and Gription (high friction porous surface). The shell is designed to accept polyethylene, ceramic and metal...

The device has a mobile polyethylene liner which is locked onto a femoral head that articules in a metallic acetabular shell. According to Smith & Nephew, the system was designed for patients, in primary and revision cases, who are susceptible to dislocation and therefore in need of greater...

The Proxima Short Stem from Depuy is a proximally loading short stem hip prosthesis made of forged titanium alloy, with a Duofix™ porous coating and hydroxyapatite surface coating. It is available in nine sizes with standard and high-offset variants. The paper by Toth (1) gives several...

The R3 Acetabular System from Smith and Nephew includes no-hole and mulit-hole options, constrained liners and large bearing options. The latter include XLPE, Oxinium, CoCr, and Biolox. Liners are designed to sit flush with the rim of the shell, reducing the potential for impingement. The...

The ReCap hip resurfacing from Biomet has the following design features: a titanium porous coated socket, with or without hydroxyapatite coating; anti-rotation fins on the socket to enhance stability; a thinner acetabular component with the aim of removing less bone than other systems; a 0.5mm...

Amplitude's Saturne Double Mobility Cup is cementless and has anatomic cut-out to resist dislocation.

According to the manufacturer, the Selexys Dual System provides a patient with a greater range of movement than many other hip systems, as well as joint stability. They say that it is therefore suitable for treating patients with profound instability and where diseased profiles place a...

This cemented monoblock Arcom ® polyethylene cup has a 3mm integral flange and 3mm PMMA spacers on the surface. The design includes a 15 degree anti-dislocation rim and an anti-impingement recess, intended to increase the range of motion of the articulation. Intended for use with the SHP...

The Silent hip is a tapered press-fit, textured implant designed to sit in the femoral neck without contacting the lateral cortex. It was launched in 2009 and remains in clinical trials. Links to clinical trials Multi-Centre Study to Assess the Long-Term Safety and Efficacy of the Silent...

The SMF Short Modular Femoral Hip System from Smith and Nephew is an uncemented titanium stem, approximately 20% shorter than conventional stems. It has a proprietary high-friction porous (mean pore size 200 microns) coating known as Stiktite ™ and has a cobalt-chrome modular neck design....

According to the manufacturer, the Spacer G is a temporary implantable device made of a load-bearing structure in AISI 316L stainless steel. The device is coated with gentamicin bone cement to assist the treatment of an infected total hip replacement using the 2-stage method. The device is...

The Summit Cemented Hip Replacement System from Depuy-Synthes is a cemented stem which is a modification of the original Charnley design. The aims of these modifications were to increase torsional stability, increase offset options and improve the cement mantle (for example with the integral...

The Summit® Cementless Hip Replacement System from Depuy-Synthes is a tapered cementless titanium hip stem, whose features include a tapered neck geometry, a Porocoat porous or DuoFix HA coating, an anatomical medial curve, a grit blasted diaphyseal region and a polished distal tip to reduce...

The Symbios hip system is a cementless, HA coated, Swiss manufactured hip system which comes in proximally coated, fully coated, modular and monoblock varieties. The stem is titanium and is either anatomic (the SPS) or straight stem (the Harmony). The system is marketed with preoperative...

The TaperLoc Microplasty from Biomet is a short femoral stem which is essentially a shortened version of the Taperloc stem (35mm shorter). This is a collarless, flat tapered wedge design, made from porous, plasma sprayed titanium. Lombardi et al give some useful advice for insertion. They...

The Furlong hemiarthroplasty system is intended for use after hip fracture. The system comprises a cemented double taper stem, with long stem options, or a Furlong HAC uncemented stem. Head options are either bipolar or physiological (large monopolar head), and the 12/14 taper allows for later...

The Trabecular Metal Augment and Restrictors from Zimmer are a selection of structural augments intended for revision or difficult primary hip reconstructions associated with significant bone loss.  This is part of the Zimmer TMARS (Trabecular Metal Acetabular Revision System).  ...

The Trabecular Metal Osteonecrosis Intervention Implant from Zimmer is intended for use in osteonecrosis of the femoral head, in Ficat and Arlet Stage 1 or 2 (ie precollapse) disease.  A study by Varitimidis et al (1) suggested an improvement in function after implantation, but no effect...

The Tri-Lock Bone Preservation Stem is an uncemented tapered wedge design primary hip replacement stem. The original Tri-Lock was introduced in 1981 as the first proximally coated tapered-wedge hip stem available. Geometrical features which preserve bone include a reduced lateral shoulder and a...

The TriboFit is an unusual socket made of a semi-flexible translucent material which is highly hydrophilic and which therefore maintains a layer of fluid around the femoral head. It is said to be associated with almost no wear as there is no physical contact between components. The associated...

The Trident Acetabular System from Stryker is an uncemented acetabular system which includes Crossfire polyethylene, X3 polyethylene , alumina ceramic, constrained liners, concentric and eccentric liners. The shells come in no-hole, cluster hole and multiple hole variants, hemispherical and PSL...

The Trilogy Acetabular Cup system from Zimmer is an uncemented socket which is an evolution of the Harris-Galante and HGP II cup designs. Options include a uni-hole shell, which allows visual confirmation of seating, a non-holed shell, cluster hole, multi hole and spiked shell configurations....

The Trilogy Longevity Constrained Liner (aka the Epsilon socket) is a constrained socket, available as a liner for the Zimmer Trilogy and Trabecular Metal acetabular shells or in a version intended for cementing into a shell. It has a unique design that aims to improve on the range of motion...

The Trinity Advanced Bearing Acetabulum System from Corin is a modular acetabular system which includes BIOLOX Delta ceramic-on-ceramic and ECiMa (vitamin E) highly cross-linked polyethylene bearing options. The shell is hemispherical, and has a plasma pure titanium and HA (Bonit) coating....

The Tritanium Acetabular Cup from Stryker is an acetabular shell manufactured from Tritanium which is a proprietary commercially pure Titanium matrix.  Stryker report the shell has 72% porosity, a coefficient of friction of 1.01 and an average pore size of 546 microns. Clinical trials...

The Wagner SL Revision Hip is a grit blasted titanium hip stem designed to gain distal fixation and rotational stability where there is extensive proximal bone loss. The principle of the Wagner stem is that the proximal bone will then recover. The implant is a monoblock, and is available in 190,...