UOL
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UOL ULNA OSTEOTOMY LOCKING PLATE emergency team for broken bones®

CONTENTS Preface 3 Screws 4 Properties 5 Indications & Contraindications 5 Assembling of the instruments 6 Positioning of the patient 7 Exposure 7 Plate insertion 8 Placement of the tensile bolts Surgical Technique Preface 9 Shortening Reduction 16 Placement of the screws 19 Removal of the instruments 22 Postoperative treatment 24 Summary Information 12 25 Order information 26 Locking 28 Dotize® 28 Sterilization guidelines 30

Preface Preface: The Ulna Osteotomy Locking Plate provides a plate system (hybrid system) to be studded with locking screws and compression screws, which is specially adapted to the anatomic and biomechanic requirements after shortening osteotomy of the distal ulna. In a single device, the Ulna Osteotomy Locking Plate allows for unique coplanar orientation of the incisions with rotation-stable shortening and the option for compression. The standardization of a plurality of surgical procedures into a single device system obtained thereby increases and secures the quality of the surgical...

Ulna Osteotomy Locking Plate 37301-XX Cortical Screw, Locking, D=3.0mm 61243-100 Spiral Drill, D=2.4mm, L=100mm, AO Connector 56095-70 Screwdriver, Torque, T9x70 56095-70-2 Self-holding sleeve, Screwdriver, Torque 9 32271-XX Cortical Screw, D=2.7mm 61203-100 Spiral Drill, D=2.0mm, L=100mm, AO Connector 56095-70 Screwdriver, Torque, T9x70 56095-70-2 Self-holding sleeve, Screwdriver, Torque 9 37302-XX Cancellous Screw, Locking, D=3.0mm 61203-100 Spiral Drill, D=2.0mm, L=100mm, AO Connector 56095-70 Screwdriver, Torque, T9x70 56095-70-2 Self-holding sleeve, Screwdriver, Torque 9 All I.T.S....

• Multidirectional locking • Anatomically shaped • No dislocation of the parts of the bone due to fixation using long-bore hole • Positioning of the plate prior to the osteotomy • Compression instrument for simple joining of the osteotomy surfaces (compression strength freely selectable) • No loss of correction due to locking • A screw can be placed through both osteotomy surfaces as a tension or fixating screw, optionally locking • Plate material: Titanium Grade 2 • Easier removal of implant after fracture has healed • Improved fatigue strength of Implant • Reduced risk of cold bonding •...

Positioning of the patient Place the patient on his back, cover the arm to be freely movable and place it on an X-ray transparent table at a shoulder abduction of 90°. Perform the operation under regional or general anaesthesia with or without using an arrest of blood supply on the upper arm. The shape of the implant allows for palmar, ulnar or dorsal positioning of the plate. The plate should be completely fitted to the bone without protruding. As the the distal palmar section of the ulna is usually curved, more proximal positioning of the plate or pre-bending of the implant are...

Plate insertion After opening the forearm fascia, mobilize bluntly the belly of the FCU (M. flexor carpi ulnaris) at its insertion point at the ulna and retract it medial using Hohmann retractors. Define the optimal position of the plate and incise the dorsal forearm fascia in the designated osteotomy area. 08

Placement of the tension bolts Place the assembled osteotomy system upon the ulna osteotomy plate, which is attached to the ulna using the plate holes alternatingly from the outside centrad; distally with D=3.0mm locking cancellous screws (37302-XX) or D=3.0mm locking cortical screws (37301-XX) (spiral drill, D=2.0mm, L=100mm, AO Connector (61203-100) for locking cancellous screw / spiral drill, D=2.4mm, L=100mm, AO Connector (61243-100) for locking cortical screw), proximally with 2 tension bolts (680859) after inserting the drill guide, D=2.0mm (62208) for the tension bolt and a D=2.0mm...

The bore diameter depends on the choice of the screw. (spiral drill, D=2.0mm, L=100mm, AO Connector (61203-100) for locking cancellous screw / spiral drill, D=2.4mm, L=100mm, AO Connector (61243-100) for locking cortical screw). 10

Shortening Incise the periosteum at the osteotomy site and retract it minimally before performing, using the incision gage and producing as little heat as possible, two atraumatic, parallel cuts according to the measured shortening. The maximum recommended osteotomy length is 6mm. Caution: In osteoporotic bones, traction bolts may tilt due to high traction forces (malformation of drilled holes in osteoporotic bone). The thickness of the saw blade may amount to 0.7mm maximally. We recommend a thickness of the saw blade amounting to 0.5–0.7mm in order to achieve precision. 12

Reduction After removal of the dissecate, the osteotomy surfaces must be cleaned meticulously of bone or soft tissue remnants before, after loosening the tension bolts (1/2 to 3/4 turn), shortening is performed using the setscrew. If there are excessive tensions and shortening difficulties, this is usually the consequence of an interponate. After contact of the osteotomy surfaces, prior to a desired compression the reduction may be additionally secured using holding tongs. After that, tighten the tension bolts firmly. 1/2 to 3/4 turn (loosening) 16

If shortening of more than 6mm is desired, two subsequent osteotomies may be performed. For recommended OT-widths please refer to table stated below. Shortening in mm First Osteotomy Second Osteotomy 0-6 required length - 7 4 3 8 5 3 9 6 3 10 6 4 11 6 5 12 6 6 13 7 6 Any desired shortening of 7-13mm may be performed following the initial OT by manual support and protected against rotation using a clamp, without using the adjusting screw on compression (for OT-widths, please see table above). As a result, the drill holes will stay undeformed to the greatest extent even in osteoporotic bone,...

Placement of the screws After making a bore with the spiral drill, D=2.0mm, L=100mm, AO Connector (61203-100), place a D=2.7mm cortical screw (32271-XX) as a fixation screw into the oblique bore. The cortical screw may optionally be used as a tension screw (bore into the corticalis near the plate using a spiral drill, D=2.7mm, L=100mm, AO Connector (61243-100)). D=2.0 mm 19