TriMed Ulnar Osteotomy SystemSurgical Technique

Ulnar Osteotomy Compression Plate

Plate Application

• ExposetheboneintheintervalbetweentheECUandFCU.

• Applytheplatetothebone.Ensurethatthetwosmallinstrumentholesonthesideoftheplatearevisible.

• Positiontheplatetoavoiddistalimpingementduringshortening.

• Drillusing2.3mm(red)drillandinsertonenon-locking3.2mmscrewintheslottedholeattheendfarthestfromtheosteotomysite.Repeatwiththree3.2mmscrewsontheoppositesideofplate,startingwiththeendscrewhole.

Pin Fixation

• PlacetheCombinationDrillGuideontheplate.

• Inserttheshort1.6mm(0.062”)K-wireflushalongthebackwallofthepinslotintheCombinationDrillGuideandthroughonecortex.

• RepeatwiththelongerK-wireandremovetheCombinationDrillGuide.

Osteotomy

• Selecttheappropriate‘A’SawGuidebasedontheplannedresection(2,3,4or5mm)andinsertintotheplate.HoldtheguidewiththeBoneClampor1.6mmK-wire(seeTips).

• Makethecutwithasawbladeof0.4mmthicknessandirrigateliberally.

• Remove‘A’SawGuideandinsert‘B’SawGuide.Makethesecondcutandremovebonewafer.

Compression Clamp Application

• InserttheCompressionClampintotheholeonthefixededgeoftheplate.

• AdjusttheclampsotheK-wiresleeveisjustbelowthecentralaxisoftheulnaandawayfromtheosteotomysite.

• Inserta1.6mm(0.062”)K-wirethroughthesleeveandengagethefarcortex.

1

2

3

4

UlnarOsteotomyCompressionPlate

2

Osteotomy Compression

• Loosenthescrewintheslottedhole1/4turn.

• ShortentheulnawithCompressionClamp.UseaBoneClampforaddedcompressionoftheosteotomysite.

• Checkbothsidesoftheosteotomysiteforbonecoaptation.

Lag Screw Hole Preparation

• Re-applytheCombinationDrillGuideanddrillalagscrewholeusing2.3mm(red)drillandguide.

• RemovetheCombinationDrillGuide.

• MeasurethelongsideoftheholewiththeDepthGauge.

• Usethebonetaptoensurethatthelagscrewthreadseasily.

Lag Screw Insertion

• Insertlagscrewensuringpurchasewiththefarcortex.

• Re-tightenthecorticalscrewintheslottedholeandensuretheosteotomyremainscompressed.

Final Fixation

• Inserttheremainingcorticalscrews.

• RemoveK-wiresandBoneClamp.

5

7

6

8

UlnarOsteotomyCompressionPlate

3

TIPS

Ulnar Osteotomy Compression PlateUOCP

• A1.6mmK-wireortheBoneClampcanbeusedto stabilizethecuttingguidestotheplatewhile osteotomycutsaremade.

• Osteotomieslargerthan5mmmaybemadeby performingsuccessivecuts.

Bone ClampOBC

Compression ClampCOMPC-UOS

Saw GuideUOSG-A-x02mm to 05mm

UOSG-B

K-WireWIRE-1.6/065WIRE-1.6/100

LAG HOLE K-WIRE SLOTS SLOTTEd HOLE

InSTRUMEnT HOLES

Combination (Drill Guide)GdUOS-1.6

Cortical ScrewHEX3.2-xx

10mm to 18mm

Cortical Locking ScrewLCBS3.2-xx10mm to 18mm

Cortical Lag ScrewLAG3.2-xx14mm to 26mm

Saw BladeOSB-9x

0.4mm thickness(Use blade lengths of 25–32mm

and widths of 6–10mm)

©2019 TriM

ed, Inc. All rights reserved. LC-72-2000-002 REV-B (03-19)

TriMed,Inc./27533AvenueHopkins/Valencia,CA91355USA/800-633-7221/www.trimedortho.com

ThepresentlyissuedU.S.patentsare:6,113,603;7,037,308;7,044,951;7,195,633;7,540,874;7,942,877;8,177,822;8,821,508;8,906,070;9,089,376;9,283,010;9,220,546;9,237,911;9,402,665;9,636,157;9,861,402.Seetrimedortho.comforalllistedpatents.

Thetechniquepresentedisonesuggestedsurgicaltechnique.Thedecisiontouseaspecificimplantandthesurgicaltechniquemustbebasedonsoundmedicaljudgmentbythesurgeonthattakesintoconsiderationfactorssuchasthecircumstancesandconfigurationoftheinjury.

Allimplantsmadefromsurgicalgradestainlesssteel