CT Scan is the Next Best Step
You need a CT scan of your wrist immediately to assess for trabecular bridging and determine if the fracture is healing, not healing, or developing nonunion. 1
Why CT Scan Now?
After 6 weeks of immobilization, X-rays alone are insufficient to accurately assess scaphoid healing. The absence of pain does not indicate union—you need objective evidence of bone healing before making any treatment decisions.
- CT scan is the gold standard for determining scaphoid fracture union at 6 weeks 1, 2
- CT provides superior visualization of trabecular bridging across the fracture site compared to plain radiographs 3
- At least 50% continuous trabecular bridging on CT is required to consider the fracture healed enough to begin mobilization 1
What the CT Will Show and Your Next Steps:
If CT Shows ≥50% Trabecular Bridging:
- Begin gentle mobilization and physiotherapy
- The fracture is healing adequately
- Continue protected activity for another 2-4 weeks
If CT Shows <50% Trabecular Bridging but Some Healing:
- Return to cast immobilization for another 2-4 weeks 1, 2
- Repeat CT at 8-10 weeks total
- Scaphoid waist fractures can take 8-10 weeks to heal with conservative treatment 2
If CT Shows No Healing/Gap at Fracture Site:
- Surgical fixation is indicated 1, 4
- This represents established nonunion or delayed union
- Surgery at this point (rather than waiting longer) prevents progression to scaphoid nonunion advanced collapse 5
Critical Considerations:
Do not rely on pain as an indicator of healing. Your minimal pain is misleading—scaphoid nonunions are often painless initially but lead to devastating arthritis later 5. The ACR guidelines specifically address your scenario: chronic wrist pain with old scaphoid fracture requires advanced imaging to evaluate for nonunion, malunion, or osteonecrosis 3.
MRI is an alternative if CT is unavailable, though CT is preferred for assessing bony union 3. MRI without contrast has 55% sensitivity for detecting osteonecrosis (proximal pole death) but is less accurate than CT for trabecular bridging 3.
Common Pitfall to Avoid:
The biggest mistake is assuming "no pain = healed." Studies show that 10 out of 44 conservatively treated scaphoid fractures had not healed at 12 weeks despite being asymptomatic 4. Your fracture needs objective CT evidence of union—not just symptom resolution—before you can safely mobilize.
Get the CT scan this week. Based on those results, you'll either resume casting, begin mobilization, or proceed to surgical fixation. The 6-week mark is the critical decision point, and delaying assessment risks nonunion 1, 5.