Ascension Modular Radial Head - PerPrima

More documents

Recommendations

Info

anatomicdesign➤➤➤stem and head sizes to fit your indications and patient anatomyarticular friendly shape – reduces edge loading on thecapitellum and radial notch allowsfor annular ligament closurecementlessRadiopaque prosthesesallow for intraoperativeverification of implantposition and postoperative assessment.➤➤➤Bone removal is minimizedCritical soft tissue structuresare preservedAlignment Awl and Guidesprovide accurate visualreference along the boneaxis promoting restorationof anatomic bone alignmentsimplifiedinstrumentation➤➤simplified instruments provide a reproducible outcomein-wound or back table assembly optionIn Situ Assembly Instruments:Stem Holder andHead ImpactorBack Table Assembly Instruments:Stem Impactor andAssembly Plate
surgical techniqueFIGURE 1The Initial Incisionand Capsular ExposureExpose the radial capitellar joint using the Kocherapproach through the interval between the anconeusand extensor carpi ulnaris muscles. Make a 6-7cmincision centered on the radial head Figure 1.Pronate the forearm during exposure to protect themotor branch of the radial nerve that passes aroundthe radial neck. If needed, release the origin of theanconeus subperiostally and retract it posteriorlyto permit adequate exposure of the capsule.Continue the dissection to the joint capsule. Dividethe annular ligament (AL) and radial collateralligaments (RCL) longitudinally along the centerlineof the head. Reflect the lateral capsule anteriorlyand posteriorly to expose the radial head Figure 2.Resecting the Radial HeadTwo methods may be used to assist in resectingthe radial head.Radial Head Resection Guide:The radial head resection guide has two resectionlevels. Inspection of the radial head and trauma tothe neck will determine if the standard or longradial head implant will be used. Prior templatingof the x-ray will also assist in determining whichradial head will be used. Use the normal or longRadial Head Resection Guide to mark the level ofthe resection Figure 3.With one edge of the guide resting on the capitellum,use a surgical marker to mark the resection lineon the neck of the radius by resting the tip of themarker against the distal side of the guide whilerotating the forearm through supination-pronation.The resulting line should mark a plane that isperpendicular to the pronation-supination axis ofthe forearm. Resect the head holding the saw bladeperpendicular to the axis of rotation. Reinsert theguide between the capitellum and the resection toensure a perpendicular cut Figure 4.FIGURE 2FIGURE 3FIGURE 4
Page 1: the shape, the size, the fitAscensi
Page 5 and 6: Broach progressively up to the sele

Ascension Modular Radial Head - PerPrima

Create successful ePaper yourself

Delete template?

Save as template?