Catalog excerpts
Tarsometatarsal Interpositional Arthroplasty SURGICAL TECHNIQUE
Open the catalog to page 1ARTHROPLASTY IMPLANT
Open the catalog to page 2ORTHOSPHERE® INTERPOSITIONAL ARTHROPLASTY IMPLANT ORTHOSPHERE® tarsometatarsal INTERPOSITIONAL ARTHROPLASTY Surgical Technique as described by Robert Anderson, MD Degenerative joint disease of the midfoot is not uncommon | FIGURE 1 and may be associated with inflammatory conditions such as gout or pseudogout. When nonoperative modalities (i.e. shoe modifications) fail to provide relief of activity-related discomfort, surgery may be considered. While arthrodesis provides good results with medial column involvement, it limits compensatory motion at the lateral column (4/5 tarsometatarsal...
Open the catalog to page 3ORTHOSPHERE® INTERPOSITIONAL ARTHROPLASTY IMPLANT STEP 4 | Once exposure is achieved and utilizing fluoroscopic confirmation, the small starter burr is used to create a center hole in the opposing articular surfaces of each lateral TMT joint | FIGURE 4. STARTER BURR STEP 5 | While preserving a cortical rim, semispherical recesses are created using the implant sized oscillating burrs | FIGURE 5. NOTE | The TAVA hand power loaner system for the oscillating burrs may be ordered from Wright. The kit number is TAVA KIT1. FINISHING BURR
Open the catalog to page 4ORTHOSPHERE® INTERPOSITIONAL ARTHROPLASTY IMPLANT STEP 6 | The trial sizing tools are inserted to ensure the sphere size is adequate (typically size 11) and will provide mild joint distraction and free motion | FIGURE 6. STEP 7 | Once the size is determined, the ORTHOSPHERE® Interpositional Arthroplasty implant is inserted with planar flexion applied to the metatarsal | FIGURE 7. Stability is verified through the ranges of motion. Overlying soft tissues are approximated and a splint is applied.
Open the catalog to page 5ORTHOSPHERE® INTERPOSITIONAL ARTHROPLASTY IMPLANT postoperative COURSE The period of immobilization and protected weightbearing after interpositional arthroplasty is dictated by concomitant procedures (i.e. medial column arthrodesis). In the event that an isolated lateral column arthroplasty is performed, the patient is immobilized and instructed non-weightbearing for two weeks. They then progress to full weightbearing in a removable walker boot. An accommodative shoe with an arch support device is then utilized at six weeks. Postoperative x-rays show placement of implants | FIGURE 8A, 8B.
Open the catalog to page 6The ORTHOSPHERE" Instrument Set includes 6 oscillating burrs, 6 implant sizers, 2 rotary starter burrs, insertion forceps, burr cleaning brush, and power adapters. The implant sizes are as follows: CATALOG* SPHERE SIZE Wright Medical Technology, Inc. Wright Medical Europe SA Commerce Pare Gebouw B, 6th Floor Krijgsman I 82006, Wright Medical Technology, Inc. All Rights Reserved. SO036-103 ORTHOSPHERE" is a registered mark of Wright Medical Technology, Inc. Rev' 2-06 Caution: Federal (United States) law restricts this device to sale by or on the order of a physician.
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