What are the Disadvantages of Intraoral Scanning?

The Flip Side of Digital Impressions

Intraoral scanning (IOS) has transformed dentistry with its precision and comfort, but it's not without hurdles. While 75% of users report daily reliance, disadvantages like high costs and learning curves persist, potentially offsetting benefits in smaller practices.

IOS vs. Traditional Impressions at a Glance

	Intraoral Scanning	Traditional Impressions
Patient comfort	No gag reflex, no messy material	Can trigger gagging, longer set time
Turnaround	Instant digital file, no shipping	Physical model must be poured & shipped
Upfront cost	High (scanner + software)	Low (trays + material)
Learning curve	Weeks of practice needed	Familiar to most clinicians
Accuracy on complex cases	Strong for single units/short spans	Still preferred for long-span (>5 unit) cases

Key Drawbacks

1. High Initial Investment: Scanners range $10K-$50K, plus $5K/year software fees. Non-users cite finances as the top barrier (66%).
2. Learning Curve: Beginners average 15-20 minutes/scan, vs. 5-10 for experts. Studies show a 7-minute drop after 10 uses, but flat proficiency takes 20+ sessions.

Learning Curve Timeline

Sessions	Avg. Time/Arch	Error Rate
1-5	20 min	High
6-10	15 min	Medium
11+	<10 min	Low

3. Accuracy Limitations: Subgingival margins or bleeding obscure scans; trueness drops 20% in moist conditions. Long-span FPDs (>5 units) favor conventional methods.
4. Environmental Sensitivities: Saliva/blood causes artifacts; ambient light/temperature affects 10-15% of scans.
5. Technical Failures: Software glitches or hardware wear lead to rescans (up to 20% rate), wasting time.

Mitigating the Downsides

• Training: Invest in courses; 40% of buyers do so pre-purchase.
• Hybrid Use: Combine with analogs for complex cases.
• Maintenance: Regular calibration cuts errors 40%.

Quick Checklist to Avoid Common IOS Pitfalls

• Dry the field before scanning — moisture and blood are the top cause of rescans
• Calibrate the scanner monthly, not just at initial setup
• Start with straightforward single-unit cases; save long-span bridges for after 10+ scanning sessions
• Keep a backup traditional impression kit on hand during the first few months of adoption
• Budget for the annual software subscription up front, not just the hardware cost

Despite these, IOS boosts efficiency 30% long-term. Weigh against your volume for ROI.