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Implants trauma Fibula Locking Plate

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All ITS plates are preformed anatomically as a matter of principle. If adjustment of the plate to the shape of the bone is required, this is possible by carefully bending gently in one direction once. Particular care is required when bending in the region of a plate hole, as deformation of the plate may lead to a failure of the locking mechanism. The plate must not be buckled or bent several times. This is particularly important in the case of titanium implants, to prevent material fatigue and subsequent failure. The method of bending is the conscious responsibility of the operating doctor;...

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1. Introduction P. 5 Preface P. 6 Screws P. 7 Properties P. 8 Indications & Contraindications P. 8 Time of operation 2. Surgical Technique P. 10 Pre-operative patient preparation P. 10 Access P. 10 Reduction P. 11 Placement of the screws P. 15 Postoperative treatment P. 15 Explantation 3. Information P. 17 Locking P. 17 Dotize® P. 18 Order list P. 20 Reconditioning Manual P. 22 Notes

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Preface The Fibula Locking Plate is a proven osteosynthesis system for various distal fibula fractures. The special feature of this implant is the free choice of screw placement. The user is able to set any desired screw in any hole, either locking or non-locking screw (except oblong hole). The free choice of screw angulation (+/- 15°, see page 17) provides an advantage in fracture treatment, especially in the case of complex fractures.

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Cortical Screw, locking, D=3.5mm, SH Spiral Drill, D=2.7mm, L=100mm, AO Connector Screwdriver, WS 2.5, self-holding sleeve Spiral Drill, D=2.7mm, L=100mm, AO Connector Screwdriver, WS 2.5, self-holding sleeve Cancellous Screw, locking, D=3.5mm, SH Spiral Drill, D=2.0mm, L=100mm, AO Connector Screwdriver, WS 2.5, self-holding sleeve

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Properties Properties of the implant: • Plate material: Titanium • Material of screws: TiAl6V4 ELI • Easier removal of the implant after the fracture has healed • Improved fatigue strength of the implant • Reduced risk of cold welding • Reduced risk of inflammation and allergy • Multi-directional Locking • Anatomically shaped • Oblong-hole for optimal positioning and alignment of the fibula length • Pointed proximal plate end for percutaneous insertion • Left/right version • Plate lengths: 4, 6, 8, 10, 12-hole

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Indications, Contraindications & Time of operation Indications: • Dislocated ankle-fractures group B+C according to Weber (with or without comminuted zones) Existing infections in the fracture zone and operation area Common situations that do not allow osteosynthesis With advanced osteoporosis In cases of skin and soft tissue problems that prevent a tension-free skin closure Obesity Lack of patient compliance Time of operation: • Immediately after injury • After regression of the swelling

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Surgical Technique

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Pre-operative patient preparation • Supine position • Primary Tourniquet • General or regional anesthesia Access Lateral access: • Skin incision above the centre of the fibula • The incision should be made 1-2cm away from the fracture so that the suture is not directly over the plate • After incision of the inferior extensor retinaculum (cruciform ligament) directly in front of the fibula the toe extensors and the variable peroneus tertius are retracted forwards 1 Reduction • Temporary fixation of the plate to the fibula shaft using forceps or temporary plate holder (58164-150) • Anatomical...

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Placement of the screws With the spiral drill, D=2.7mm, L=100mm, AO Connector (61273-100), drill through the drill giude, D=2.7/2.0mm (62202) into the long-hole. Determine appropriate length using the depth gauge, solid small fragment screws (59022). Insert the D=3.5mm cortical screw (32351-XX) with the screwdriver, WS 2.5, self-holding sleeve (56252). Advice: For optimal alignment of the plate with fibula length, we recommend to first occupy the oblong hole.

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Then using the spiral drill, D=2.5mm, L=100mm, AO Connector (61253-100) to drill through the drill guide, D=2.7/2.0mm (62202) into a distal plate hole. Determine appropriate length using the depth gauge, solid small fragment screws (59022). Insert the D=3.5mm locking cortical screw (37351-XX-N) with the screwdriver, WS 2.5, selfholding sleeve (56252).

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Using the spiral drill, D=2.7mm, L=100mm, AO Connector (61273-100) drill through the drill guide, D=2.7/2.0mm (62202) into a shaft plate hole. Determine appropriate length using the depth gauge, solid small fragment screws (59022). Insert the D=3.5mm cortical screw (32351-XX) with the screwdriver, WS 2.5, self-holding sleeve (56252).

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The remaining plate holes are then filled, with either locking or non-locking screws. Subsequent control of plate position under fluoroscopy.

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Postoperative treatment • Splinted shank for 2 weeks • Physical therapy • 6-8 weeks rest • When a locking screw connection has been used, it is necessary to be aware that the diagnosis of a non-union may be very delayed. Explantation If desired by the patient, the implant can be removed. Removal should be performed at the earliest 6 months - 1 1/2 years later or after radiographic verification of the healed bone. The problem of cold welding was resolved by using a special surface treatment (for further information see page 17).

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Locking Locking works because: • Screw material (TiAlV) is slightly harder than plate material (Titanium Grade 2) • Screw head forms thread into the plate (no cutting) ± 15° and Locking No pre threading No cold welding No debris You can re-set the screw up to 3 times Dotize® Chemical process - anodization in a strong alkaline solution* Dotize Type II anodization • Layer thickness 2000-10 000nm + Film becomes an interstitial part of the titanium + Different colors - Implant surface remains sensitive to: Chipping Peeling Discoloration - No visible cosmetic effect Dotize® Type - II Anodization...

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