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SCAPHOID NONUNION SCAPHOID NONUNION PEARLS AND PITFALLS

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Page 1: scaphoid nonunion panel Esfahan 16 ordibehesht 95.ppt · Microsoft PowerPoint - scaphoid nonunion panel Esfahan 16 ordibehesht 95.ppt [Compatibility Mode] Author: bahare Created Date:

SCAPHOID NONUNIONSCAPHOID NONUNION

PEARLS AND PITFALLS

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Nonunion: Main QuestionsNonunion: Main Questions

1‐Is there malalignment? (DISI, humpback) 

2‐ Is there AVN? 

3 I h d i f i l f ?3‐ Is there degeneration of articular surfaces? 

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1‐Evaluate the Alignment1 Evaluate the Alignment

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2‐Diagnosis of AVN

MRI  Or CT scan

T‐1  or T‐2

With or without contrast enhencement

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3‐Degenerative Changes3 Degenerative Changes

SNAC Wrist

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• SLACSLAC

S C• SNAC

• SMAC

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SLAC ISLAC I

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SLAC IISLAC II                         

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SLAC IIISLAC III                          

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SLAC IVSLAC IV 

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SLAC I SNAC ISLAC I SNAC I

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SLAC II SNAC IISLAC II                         SNAC II

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SLAC III SNAC IIISLAC III                          SNAC III

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SLAC IV = SNAC IVSLAC IV   SNAC IV

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Nonunion: Main QuestionsNonunion: Main Questions

1‐Malalignment?  ……………………Standard X‐rays

2‐AVN? …………………………………..MRI

3 D i X d CT3‐ Degeneration………………………X‐ray and CT scan

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Trauma 8 Weeks AgoTrauma 8 Weeks Ago

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WHEN THERE IS NO NEED FOR BONE GRAFT?

In subacute fracture and in fibrous or nonunions with normal alignment 

and without AVN

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When Do You Use Bone Graft?When Do You Use Bone Graft?

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Technique and Type of Bone Graft

Approach

Shape of the graftShape of the graft

Vascularized/nonvascularized

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Correction of Humpback Deformity (DISI)

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• What would be the plan if the proximalWhat would be the plan if the proximal fragment is avascular?

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CT scan or MRI?CT scan or MRI?

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Various Techniques for 4‐Corner Fusion

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4‐Corner v/s Lunocapitate Fusion4 Corner v/s Lunocapitate Fusion

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Fixation in Lunocapitate FusionFixation in Lunocapitate Fusion

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Excision of Triquetrum in Lunocapitate Fusion

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Other reported but less popular htechniques

Styloidectomy andSty(scaphoid is not resected)

Styloidectomy and Scapholunocapitate fusion in SNAC IIfusion in SNAC II

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Other reported but less popular htechniques

Resection of distal scaphoid and scapholunocapitate fusion

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Other reported but less popular htechniques

• Excisin of proximal pole

• StyloidectomyStyloidectomy

• Trimming of distal pole

• Fusion of the remaining part of Lunocapitate fusion

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Conclusion:Conclusion: 

• Three basic questionsee bas c quest o s• No need for bone graft in subacute fx and in NU with less than 2 mm of sclerosis if the alignment gis nl and AVN doesn’t exist

• Cancellous bone graft in normally aligned NU• FisK wedge graft in case of malaligment DISI• Bone graft is contraindicated if there is intercarpal arthrosis

• Scaphoidectomy and partial fusion