Corus vs. Smile Doctors: Which Orthodontic Partnership Is Right for You?

An orthodontist looks at a computer. Learn how DSOs and OSOs generate returns, where private equity fits in, and how doctor-owned models differ before you evaluate a partnership offer.

A detailed comparison of two leading orthodontic partnership models

If you’re an orthodontist weighing your options beyond solo ownership, you’ve likely come across both Corus Orthodontists and Smile Doctors. Both describe themselves as orthodontic service organizations built by orthodontists, for orthodontists. Both talk about partnership, autonomy, and support. But underneath similar language, the two organizations are structured quite differently, and those structural differences shape your equity, your governance, and your long-term outcome as a partner or affiliate.

This comparison guide will help you understand the key differences in OSO models and evaluate which may be the best fit for your practice. We take a look at Corus and Smile Doctors on ownership, growth strategy, and the philosophy behind their models, including an honest look at what a Smile Doctors partnership actually offers orthodontists, along with the questions worth asking either organization before you sign anything.

The Two Organizations at a Glance

Corus Orthodontists was founded in 2019 to build an alternative to the traditional DSO model, with practicing orthodontists involved at the clinical, foundational, and board levels.¹ The positioning is the important part here: Corus describes itself first and foremost as a doctor-owned, doctor-founded, and doctor-financed partnership network. The full stats are below.¹

Smile Doctors describes itself as the largest orthodontic support organization in the U.S., built primarily through an aggressive acquisition strategy that accelerated further in 2025.⁴ ⁵ Here’s how the two compare side by side.

Key Differentiators

Key Differentiators	Corus Orthodontists	Smile Doctors
Founded	2019, by 18 orthodontists	2015, by three orthodontists
Headquarters	Calgary, Alberta (U.S. and Canadian operations)	Dallas, Texas (U.S. only)
Network size	65+ Doctor-Partners, 75+ locations	580+ locations
Geography	13 U.S. states, 5 Canadian provinces	36 U.S. states
Ownership structure	Majority doctor-owned and doctor-led; practicing orthodontists hold the substantial majority of shares	Institutionally backed; affiliated orthodontists reportedly hold a minority equity stake alongside private equity ownership
Core model	Equity partnership: doctors buy in and become shareholders	Affiliation model described as “freedom within a framework”
Language used	“Partnership”: doctors are partners and shareholders	“Affiliation”: practices affiliated with the network
Growth approach	Selective, values-aligned expansion	Acquisition-driven expansion, including the 2025 acquisition of myOrthos and 100+ new locations added that year

Ownership Is the Separator in Your Choice Between Smile Doctors and Corus Partnership

The most consequential difference between the two organizations isn’t the size of the network. It’s who actually owns it.

At Corus, doctors have been shareholders from the founding group forward, and the organization has remained primarily doctor-owned as it scales.¹ Corus doctors participate in practice-level profit sharing, receive a cash component at the outset of partnership, and hold equity in a diversified portfolio of practices spanning the US and Canada – meant to protect and grow our doctors’ initial investment.¹

Smile Doctors’ own materials describe an “equity model with an opportunity to grow” for affiliated doctors, but the company doesn’t publish the specific percentage of equity orthodontists hold.⁷ Independent industry reporting indicates the organization is majority-owned by private equity sponsors, with a series of institutional investors, including Linden Capital Partners and Thomas H. Lee Partners, holding controlling stakes since 2017 and 2022, respectively.⁶ Affiliated orthodontists are reported to hold a minority position in the company.⁶

A doctor-majority structure ties governance and long-term value creation to the people practicing clinically. An institutionally controlled structure ties governance to the priorities of its financial sponsors, whose investment horizon and return expectations matter for a doctor evaluating fit.

Growth Philosophy Signals a Lot

Smile Doctors has built its scale primarily through acquisition. The 2025 purchase of myOrthos alone added more than 70 locations across 13 states in a single transaction, part of a broader year that saw the network add more than 100 new locations.⁴ ⁵ That pace of consolidation has made Smile Doctors one of the most acquisitive platforms in the orthodontic and broader dental services space.

Corus has taken a more deliberate path, growing through partnerships with practices that share its values rather than treating scale as an end in itself.¹ A faster-growing network may offer more resources and negotiating leverage with vendors. A more selective network may offer a tighter-knit peer community and a governance structure less likely to shift as new capital comes in.

“Partnership” and “Affiliation” Aren’t Interchangeable

Language matters here more than it might seem. Corus uses the word partner deliberately: Doctor-Partners hold shares, sit on advisory committees, and are represented at the board level.¹ Smile Doctors uses the language of affiliation: practices affiliate with the network, and the company describes a “freedom within a framework” approach in which doctors maintain day-to-day clinical control while operating within centralized systems.⁷

This distinction often comes down to how much say a doctor has in decisions beyond their own four walls, and how directly their financial outcome is tied to the network’s performance versus their individual practice.

Which Model Fits Which Doctor?

Corus may be the better fit if you:

Want to invest in a business where your partners are mostly other doctors like you
Value being part of a smaller, tightly connected peer network where doctors have a direct governance voice
Are looking for a long-term partnership rather than a transaction, and are comfortable with a partnership network that grows more selectively
Practice in, or want to practice in, one of Corus’ current U.S. or Canadian markets

Smile Doctors may be the better fit if you:

Prioritize scale, brand recognition, and the resources of a larger national network
Are comfortable with an institutionally backed ownership structure
Want access to a wide footprint across many U.S. states
Are open to a joint-venture option where the practice retains 10-20% of equity as part of a buyout

Doctors at different career stages will weigh these tradeoffs differently. New graduates may care most about how quickly equity accrues. Mid-career practitioners may care more about how much autonomy they retain. Established owners considering succession may care most about what happens to their practice’s identity and staff after the transition. Whichever stage you’re in, the question is the same: does this organization’s structure match what you want your next chapter to look like?

Questions Worth Asking Either Organization

Before evaluating a partnership or affiliation agreement with any OSO, including Corus or Smile Doctors, it’s worth asking:

Who actually owns the company, and what percentage of equity will I hold? Ask for the specific number, not a general description of “an equity opportunity.”
What happens to my equity if the organization is sold or recapitalized? Institutionally backed platforms are built with an eventual sale or recapitalization in mind. Understand what that means for your stake.
Who sits on the board, and how are practicing doctors represented in governance decisions?
How is compensation structured, and how much of my income is tied to my own practice’s performance versus the network’s overall performance?
What does the organization’s growth strategy look like over the next five years, and how might that affect the culture I’m joining?
What decision-making authority do I retain over staffing, scheduling, technology, and clinical protocols?
What does the exit or succession process look like if I want to retire or transition out in the future?

The answers will tell you more about fit than any brochure or website comparison, including this one.

What OSO is Right for Your Orthodontic Practice?

There’s no single best orthodontic OSO to join, only the one that’s best for you. Both organizations are partnership models built for orthodontists, but that shared language shouldn’t obscure how differently they’re built underneath it. This partnership network comparison comes down to what you’re actually optimizing for: national scale and brand reach, or equity, governance, and a smaller community of elite doctors who are also the organization’s owners.

Ready to see what genuine doctor ownership looks like in practice? Learn how Corus works for Doctor-Partners, or explore how to choose between a DSO and an OSO.

Book a Discovery Call

Corus takes a different approach to how a partnership organization makes money: doctor-led, ortho-specific, and built around genuine equity participation rather than a portfolio built to be sold quickly. Doctor-Partners hold real ownership stakes and share in the value they help create, rather than watching that value accrue to an outside fund with its own financial agenda.

Book a Discovery Call to talk through what a doctor-owned partnership model could look like for your practice today.