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Palmar Plating of Distal Radius Fractures – Pearls and Pitfalls

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Palmar Plating of Distal Radius Fractures – Pearls and Pitfalls Palmar Plating of Distal Radius Fractures – Pearls and Pitfalls Michael S. Bednar, M.D. Chief, Hand Surgery Professor, Dept. of Ortho Surgery & Rehab Loyola University – Chicago Disclosure n Consultant – Biomet/Zimmer Evolution in Treatment of Distal Radius Fractures 1 External Fixation and Percutaneous Pinning External Fixation and Percutaneous Pinning External Fixation 2 Percutaneous Pinning Percutaneous Pinning Old ORIF concept: n Dorsally displaced = Dorsal plate n Palmarly displaced = Palmar plate 3 Goals of Treatment n ORIF n Indications n Displaced palmar intra and extra- articular fractures ORIF n Palmar Barton and Smith Fractures n ORIF is accepted form of treatment n Palmar plate is well tolerated n Exposure radial to FCR has low morbidity 4 Cohort Studies Volar Fixed Angle n Orbay, J. L., Fernandez, D.L. (2002). 31 partients n Kamano, M., Y. Honda, et al. (2002). 33 patients Follows the contour of the subchondral bone Pegs and screw locked into plate support articular surface when placed directed under the subchondral bone. 5 Distally angled pegs neutralize dorsal forces Joint Reaction Force §.Volar buttress neutralizes volar forces Volar locking plating indications • Dorsal or palmar angulation • Intra-articular fractures • Comminuted fractures • Osteopenia Volar locking plating indications • Dorsal or palmar angulation • Intra-articular fractures • Comminuted fractures • Osteopenia 6 3 Months Post OP Wrist Fractures = ORIF 7 ORIF 8 No metal over radial styloid, causes tendon ruputure Complications – Wrong Fracture Type n Diagnosis - Radial styloid fractures n Fracture displacement not well neutralized by volar plating n Radial fixation Complications – Wrong Fracture Type 9 Complications – Wrong Fracture Type Complications – Wrong Fracture Type Complications - Incomplete Reduction of Fracture n Persistently dorsally displaced or angulated n Leads to prominence of distal plate at watershed line 10 Complications - Incomplete Reduction of Fracture n Persistently dorsally displaced or angulated n Leads to prominence of distal plate at watershed line Complications by the Steps of the Procedure n Intra-operative - Plate too distal n Flexor tendon irritation/rupture Distally angled pegs neutralize dorsal forces Joint Reaction Force §.Volar buttress neutralizes volar forces 11 Complication – Plate in Wrong Position n 68 y.o. man n PMHx: s/p MI, IDDM, prostate cancer, COPD on steroids n Right distal radius fracture n Treated with ORIF (palmar plate by trauma orthopaedic surgeon) RK – 2/27 RK – 3/02 12 RK – 3/17 RK – 4/01 RK – 4/01 n “It doesn’t hurt that bad and I want to go fishing this summer. I don’t know how many summers I have left.” n PE: wrist ext 20°/flex 20°, minimal pain n Asked to return in fall or if pain got worse 13 RK - 9/21 n “The pain is terrible. I hate the last guy for having done this to me. You got to help me.” n Treatment options? RK – 9/21 RK – Intraoperative Culture n Results n SPECIMEN DESCRIPTION: RADIUS LEFT TISS n GRAM STAIN: FEW WHITE BLOOD CELLS NO ORGANISMS SEEN n CULTURE RESULTS: SUBCULTURED THROUGH BROTH STAPHYLOCOCCUS SPECIES, COAGULASE NEGATIVE SUSCEPTIBILITY PATTERN CONFIRMED BY ALTERNATIVE METHOD NO ANAEROBES ISOLATED 14 RK 5/06 Complications– Positioning Plate n Intra-operative - Plate too proximal n Poor contact of locking screw/peg with subchondral bone n Leads to collapse which may lead to hardware failure n Drobetz (J Hand Surg Am 2006) nPlacement of locking screw >4 mm proximal to subchondral bone led to 50% reduction in radial length and 50% reduction in rigidity of load to failure Fixed Angle -­ K Wires • Allows for provisional plate placement • Maintains reduction • Allows you to assess peg placement prior to drilling 15 Plate Too Proximal Plate Too Proximal Plate Too Proximal 16 Plate Too Proximal Complications - Plate Too Ulnar n Intra-operative - n Ulnar screw in sigmoid notch n Impingment of ulnar head on plate n Radial screws intra-articular 17 CB • 32 yo female massage therapist • S/p ORIF of distal radius 3 months ago • Restricted, painful supination • Placed in dyamic forearm brace Intra-Articular Screw Placement 18 Complications – Screws Too Long n Irritation of extensor tendons n EPL most commonly ruptured n Causes, Benson (CORR 2006) nPostreduction bone spurs nDorsal gapping nProminent screw tips Complications – Screws Too Long n Difficult to determine screw length intra- operatively, Greenberg (J Hand Surg Am 2009) n Fluoroscopy sensitivity in detecting cortical penetration n 82% sensitive in the radial-most position n 77% sensitive in the central position n 57% sensitive in the ulnar position Complications – Screws Too Long n Treatment n High index of suspicion n Undersize locking/screw peg n Remove hardware if irritation occurs 19 Complications – Screws Too Short n Poor support with subchondral bone n Locking screws/pegs need to be in contact with dorsal subchondral bone n Locking screws/pegs need to be at least 75% of the AP diameter of the subchondral surface LB n Conclusion n Volar locking plates have expanded the indications for ORIF of unstable distal radius fractures n Not every operative distal radius fracture requires a volar plate n Careful attention to surgical details is paramount to obtaining a good surgical result 20 Conclusion n ORIF of distal radius has not become so easy that even a cave man can do it. THANK YOU 21.
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