Surgical Technique Type TC Oval Cup - NEW TYPE - 16 Pages

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Surgical Technique Type TC Oval Cup - NEW TYPE

Catalog excerpts

Surgical Technique Type TC Oval Cup - NEW TYPE Cementless Femoral Hip Joint Components

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Implant Description Surgical Technique Surgical Technique Introduction Type TC cups are intended for revision replacement surgery after a previous proximally migrating cup, as well as for primary implantation. This publication is intended as an instruction manual for this particular implant and instrumentarium. It is only intended for the implantation technique for this implant, and assumes that both the surgeon and remaining staff are thoroughly informed about general rules concerning hip replacement surgery. The goal of this publication is to provide doctors and scrub nurses with...

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Oval TC cups are made of titanium (ISO 5832-3), and come in three sizes in terms of external diameter (D), and in two lengths (L). Oval TC cups consist of a cup and articulation insert type S.F./N or S.F./10, and are implanted without using bone cement. Each cup is supplied with a bottom plug screw and plug screws for cup shell openings, and with a wire security spring that is already inserted into a groove in the shell. Cups are marked with two marks: one mark (D) indicating the diameter of the distal wider part; and a second mark (L) indicating the length of the cup in its longest...

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Implant Description Surgical Technique Cortical screws with a low head with a 3.5 mm hexagon are supplied in eight lengths, from 15 to 55 mm. Screws feature a self-tapping tip. Cancellous screws with a low head with a 3.5 mm hexagon are supplied in six lengths, from 25 to 55 mm. Screws feature a self-tapping tip. Locking screws with a 3.5 mm hexagon are supplied in six lengths, from 25 to 55 mm. Screws feature a self-tapping tip. Complete TC Cup Set Complete sets for total hip joint replacement consist of the femoral component (stem), head and acetabular component (cup), supplemented with...

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Instruments for Application of Oval TC Cup The instrumentarium is placed on two trays, allowing instruments to be properly arranged and sorted during operations, as well as for their proper preparation, sterilisation and storage. The tray arrangement is shown in the following images.

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Implant Description Surgical Technique Implant Indications This implant is intended for implantation into a nonspherical acetabula, mainly due to the extent of the impaired spherical shape according to Paprosky type 2A, 2B, 2C and 3A. Patients with clear infectious damage to the hip TEP, with a fracture in the area of the acetabulum, or a dissociation of pelvis of Paprosky type 3B are not suitable for this type of oval cup in its current version.

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■ SurgicalTechnique General Rules Surgery using oval TC cups may be performed employing any approach that the surgeon deems appropriate. Before any surgery using oval cups, it is necessary to conduct pre-op planning, which allows for determining the size of implant. Planning the size of implant is performed using manufacturer-supplied templates . These templates are placed on X-ray images with the same magnification. The surgical technique and surgical procedure differ according to the chosen approach. It is possible to recommend Bauer's approach; in some cases, we can achieve a good result...

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Implant Description Surgical Technique Using a plastic template 3 placed on a holder for the shaped template 7 , we determine the approximate size of TC cup and corresponding size of reamer (Fig. 2). The wall and bottom of the acetabulum are gradually adjusted. In the distal area of the defect, a rotation reamer 1 is used, connected to an extension 2 up to 2 mm smaller than the cup’s distal diameter (Fig. 1). Based on the evaluation using the plastic template 3 , the reamer indicated in the table is used for preparing the superior acetabulum. A size 40 reamer is used for a size 50 implant,...

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2. Adjustment of Longitudinal Diameter of Acetabulum Using Reamer Guide The plastic handle is removed from the grating reamer (2) extension, and a plastic shell of a guide (16 slides over it so that its collar is directed towards the clamping end (Fig. 4). A grating reamer d> with corresponding transverse diameter to the TC cup ribs is clamped to the extension, i.e. a size 40 reamer is used for a size 50 cup, a size 46 reamer for a size 56 cup, and a size 52 reamer for a size 64 cup! A reamer guide 16 with corresponding size (marking on Fig. 5a) is placed on a reamer guide holder with a...

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Implant Description Surgical Technique A sleeve is inserted into the cube (j6 • The sleeve determines the correct longitudinal diameter of the TC cup. For a shorter longitudinal diameter TC cup (ovality 12), a sleeve (j§) is inserted into the cube so that the extension @ with the reamer is closer to the guide arm (r|. For a longer longitudinal diameter TC cup (ovality 18), the sleeve @ is turned 180° (Fig. 8). The correct position may be checked using the description on the reamer guide cube (j5 . Caution: The depth of reaming should be checked while reaming. In case of a greater depth of...

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3. Introduction of Cup Shell We prepare the assembly for introduction of the actual TC cup (Fig. 9a, b, c). The cup shell may be supplemented with a size S or L distal hook. If we so decide, we screw out the plug screw with an articulated screwdriver from the cup shell from the hook connection site, and a hook is introduced to the shell's exterior in the distal hook groove. The hook position is secured with a security screw using an articulated screwdriver. The security screw is supplied together with the hook. To secure the hook, it is not possible to use a plug screw; it has a smaller...

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Implant Description Surgical Technique cup’s ante-version with respect to the sagittal plane. We recommend choosing a cup ante-version of 10 to 15°. Before shell introduction, the bottom of the acetabulum is filled with bone grafts (the implant has a flat bottom). The TC cup shell is introduced to the prepared acetabulum; we determine the required position using the arms, and the cup shell is anchored using hammer blows on the introducer’s bumper. The shell must be held firmly during introduction in a particular position (Fig. 10). Note: Before cup shell introduction to the prepared...

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