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CONCORDE Interbody System ™ for Transforaminal Lumbar Interbody Fusion (TLIF) Surgical Technique

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Introduction CONCORDE™ Interbody System Surgical Technique Pedicle Screw Insertion 2 Facetectomy and Working Zone Preparation 3 Annulotomy and Initial Disc Dissection 5 Initial Distraction and Preparation of Disc Space 6 Final Disc Preparation and Endplate Cleaning 7 Decortication and Placement of Bone Graft 9 Cage Insertion—CONCORDE Interbody System 11 Implant orientation for lordotic CONCORDE 11 Interbody System Final Compression 12 Verification of Final Cage Placement 12 Product Information CONCORDE Interbody System Product catalog 14 CONCORDE Bullet Ti and CFRP Indications and Usage 20...

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Surgical Technique 1 Pedicle Screw Insertion Pedicle screws can be placed either before or after the interbody reconstruction. It is often advantageous to have screws as a distraction point during the procedure. Many surgeons place screws before the spinal canal is exposed. If placing screws is done after the facetectomy as shown (Figure 1), take extra care to avoid dural injury during the placement of guide wires, taps, or screws. Identify proper pedicle insertion points for guide wires, taps or screws. The optimal insertion point is at the intersection of the transverse process and...

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Concorde - 5

Surgical Technique 2 Facetectomy and Working Zone Preparation (L5/S1) In order to gain transforaminal access to the disc space, a unilateral facetectomy is performed. The side chosen for the approach is often determined by the location of the pathology or the presence of scar tissue. Resect the ligamentum flavum from the anterior surface of the lamina with a curette. The inferior lamina of L5 can be removed by a Kerrison rongeur illustrated by the dotted line of Figure 2 to improve access to the ligamentum flavum. Resect the inferior articular process of L5 with a straight osteotome or a...

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Surgical Technique Resect the superior articular process of S1 with a straight osteotome or a Kerrison while protecting the traversing nerve root to expose the intervertebral foramen (Figure 4). Expose the medial and cephalad margin of the S1 pedicle by removing the overhanging superior articular process with a Kerrison punch to gain final exposure of the L5/S1 disc. Complete thorough hemostasis over the exposed disc space with the use of bipolar cautery (Figure 5). It is essential at this point to coagulate the epidural veins overlying the disc space. 4    DePuy Synthes  CONCORDE™...

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Surgical Technique 3 Annulotomy and Initial Disc Dissection Care should be taken to gently retract and protect the exiting L5 nerve root and lateral part of the central dural sac. A dissector or nerve root retractor is used to protect these structures at every step of the procedure (Figure 6). The epidural veins have now been ligated to afford a corridor of approach to the disc space. Perform a box annulotomy to create a window into the disc space (Figure 7). After the box annulotomy, a pituitary rongeur is used to initially remove loose nuclear tissue in order to clear an initial space for...

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Surgical Technique 4 Initial Distraction and Preparation of Disc Space Initial distraction of the disc space is necessary in order to access the disc for a thorough discectomy which is required for good fusion preparation and orientation for optimal cage insertion. Distraction can be achieved using one of the following methods: • Distraction between pedicle screws • Distraction between the spinous process Use of a starter dilator (8 mm) or a disc spreader from the disc preparation set as pictured in Figure 9. After the initial removal of disc tissue, a starter dilator (8 mm) or a spreader...

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Concorde - 9

Surgical Technique Once distraction is obtained, the opening of the disc space can be maintained with either a temporary rod (Figure 12) or the use of a laminar spreader between the spinous processes. 5 Final Disc Preparation and Endplate Cleaning The final discetomy is performed using a combination of curettes, osteotomes, rongeurs, and shavers (Figure 13). Care should be taken to maintain the integrity of the endplates and to protect the dura with appropriate retractors wherever instruments are passed in and out of the disc space. Once the initial central portion of the disc has been...

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Concorde - 10

Surgical Technique An osteotome can be used to remove the posterior lip of either vertebral body flush to the endplates to optimize visualization and access for the anterior contralateral aspect of the disc (Figure 14). The resection of the posterior lip will also provide a smooth path for insertion of the cage. It is important that a flat, parallel surface is achieved in preparation for the insertion of the interbody device. Precaution: Care should be taken to preserve the integrity of the endplates when resecting the posterior lips. In order to ensure the disc material is removed from the...

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Concorde - 11

Surgical Technique A curette or a rasp can be used in a scraping fashion to separate and remove any remaining disc and cartilage from the bony endplates. Straight or angled rongeurs are utilized to remove any remaining loose disc material. A variety of straight, angled, and offset cup, ring, and down biting curettes are available from the disc preparation set to facilitate further disc removal. Double angled cup curettes (left and right) can also be utilized to remove disc material from the contralateral side of the disc space; these will specifically address the inferior and superior...

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Surgical Technique 7 Cage Trialing Trialing to aid in correct selection of the implant is extremely important. A cage trial should be used prior to insertion of the implant to evaluate potential cage placement and determine the optimal implant fit (Figure 18). Lateral fluoroscopy may be useful in analyzing implant orientation and ultimate desired lordosis. The cage trials match the parallel configuration available with CONCORDE Interbody System Implants. Trials are sized to match the overall height of the corresponding implant, including the teeth of the implant. 11    DePuy Synthes ...

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