Orthodontics Free-Consult Blitz: 18 Started Cases From 800 Postcards

The challenge

Maple Ridge Orthodontics had a problem most practice owners would call a good problem: full referral pipeline from local pediatric dentists and zero meaningful new-patient acquisition outside that pipeline. The owner had grown comfortable, but two new clear-aligner-focused competitors had opened within 8 miles in the past year, and the demographic data showed 1,800 households in his catchment area with a school-age child who hadn't been to any orthodontic consult.

Existing marketing was Google Ads at $2,400/month, generating roughly 6 starts a quarter at a blended cost-per-start of $1,200. The owner suspected the Google Ads pool was self-selected for shoppers — people who'd already decided on aligners and were comparison-shopping on price. He wanted a way to surface families who hadn't started shopping yet — to be top-of-mind before the search.

Direct mail had been on the owner's list for two years, but the prospect of "50,000-piece blast at $1.20 per piece" through a traditional mailing house felt like a coin-flip he wasn't ready to take. A targeted, smaller-list approach — neighborhood farm to households known to have school-age kids — was the angle he wanted to test.

The PostKnock approach

Playbook used: Free Consult Acquisition

We loaded a purchased neighborhood farm list — 800 households filtered to ZIP+4 demographics with at least one child age 7-14 — into PostKnock's Free Consult Acquisition playbook. The free-consult angle is high-intent for orthodontics: parents already wondering about their kid's bite are highly likely to convert if the friction is removed. We picked 4.5% as our response forecast — the high end of the 3-6% range — because the offer ('free consult, free panoramic X-ray, no commitment') is unusually high-value at zero out-of-pocket.

Wave 1 was a 6x9 postcard with a clean visual (kid smiling, no metal-mouth fear imagery), a single offer ('free consult + panoramic X-ray, $250 value'), and a QR code that deep-linked into the practice's online booking calendar. The address line included the household name ("The [Last Name] Family") rather than addressing a specific recipient — a tactic that pulls better in family-decision categories than personalized-to-parent. No phone follow-up between waves; the practice's admin team didn't have bandwidth, and the owner was reluctant to cold-call neighborhood lists.

Wave 2 dropped at week 4 with different creative — a before/after photo (composite, model-released stock) and a "summer is when most cases start" seasonal urgency line. The campaign ran during March-April so the seasonal nudge aligned with parent decision-making for a summer treatment start. Total: 1,600 pieces, no calls, 8-week campaign window.

Campaign timeline

Week 0

Neighborhood list purchase + verification, 2 creatives proofed.

Week 1

Wave 1 drops (800 cards). QR online-booking deep-link active.

Week 2-3

Bookings flow. 26 free-consult appointments scheduled.

Week 4

Wave 2 drops (800 cards). Before/after creative + summer urgency.

Week 5-6

Second wave of bookings. 10 incremental consults.

Week 7-8

Consults complete. 18 of 36 consults convert to active treatment plans.

Results

Thirty-six free consults booked across 800 unique households (4.5% response), with 18 converting to started treatment plans — a 50% consult-to-start rate which is actually slightly below the practice's referral-channel benchmark of 64%, reflecting the lower-intent nature of cold mail vs. dentist referrals. Average case value at this practice is $4,800 (clear aligners, 18-month treatment), giving us $86,400 in committed treatment revenue.

Campaign cost ran $3,460 — $960 in postcards (1,600 at $0.60), $297 in PostKnock Pro for 3 months, and $2,203 in list purchase + verification. ROI of 25x is the headline; cost-per-start dropped to $192 vs. the $1,200 Google Ads benchmark. Crucially, the consult-to-start ratio gave the owner a clean diagnostic on his case-presentation flow — and the 18 non-converters became a remarketing list for the next campaign.

“I'd been told for years that postcards don't work for ortho. They didn't work at $1.20 per piece, blanket-mailed to 50,000 households. They work at $0.60 per piece to 800 households I actually want.”

— Owner-Orthodontist, Maple Ridge Ortho (composite illustration)

What we’d do differently

• Family-name addressing ("The Henderson Family") outperformed parent-name-targeted in this category. Buying decisions are joint; the card needs to be addressable to whoever picks up the mail.
• We forecasted 4.5% on the high end of the 3-6% range and hit it — but only because the offer is genuinely valuable. A discount-only offer would have pulled closer to 2.5%. Free + zero-friction is the real driver.
• We skipped phone follow-up and lost roughly 4-6 hot leads who never booked from the QR. Next campaign we'd add a single Wave-1.5 reminder call to bookings-not-completed who scanned but didn't finish.