Methodology
How Private Practice Research is produced.
Private Practice Research is the federal-data-anchored research institute for U.S. dental practice economics. Five standards apply to every publication: independence, federal-data anchoring, original-research datasets, validation with disconfirmation, and the PPR Certified mark.
PPR’s research methodology integrates federal provider records, federal acquisition-financing records, manufacturer-payment disclosures, dental-board licensure records, peer-reviewed academic citations, public-company disclosures, and continuous industry-ecosystem monitoring into a single evidence framework.
Independence
Private Practice Research holds zero commercial relationships with dental brokers, dental service organizations, transition advisory firms, or industry consultants whose business outcomes depend on the publications studied. The institute does not list practices, represent buyers or sellers, or collect referral fees. Operating costs are covered by private contributions from individual dental practitioners; reviewers and contributors with a material interest in a publication recuse themselves and the recusal is recorded.
PPR Certified
PPR Certified marks publications that meet the standards above. The Methodology Review Board signs the methodology under which any PPR Certified figure is published. Numbers that do not clear those standards are not PPR Certified.
Source taxonomy
The institute draws on a structured taxonomy of source classes. Every publication discloses which classes it draws on. The institute prioritizes federal-authority datasets and named primary sources, with industry aggregates cited as cross-validation.
Primary federal-authority data
- U.S. Bureau of Labor Statistics (BLS) — Occupational Employment and Wage Statistics for dentists, oral and maxillofacial surgeons, dental hygienists, dental assistants, and dental laboratory technicians; employment projections.
- Federal Reserve Economic Data (FRED) — dental-occupation wage and hours time-series with longitudinal coverage to 1987.
- National Plan and Provider Enumeration System (NPPES) — Type-2 organizational NPI registry, providing atomic practice-entity counts by ZIP code and specialty taxonomy.
- U.S. Small Business Administration — 7(a) loan FOIA disclosures, naming dental practice acquisition transactions and financing-implied valuations by ZIP-year.
- U.S. Census Bureau — County Business Patterns (NAICS 6212), Economic Census, and Statistics of U.S. Businesses for dental establishment counts and employment.
- Health Resources and Services Administration (HRSA) — Area Health Resources Files for county-level practitioner counts; Dental Health Professional Shortage Area designations and workforce projections.
- Securities and Exchange Commission EDGAR — public-company dental-segment disclosures from filers including Henry Schein (HSIC), Patterson (PDCO), DENTSPLY SIRONA (XRAY), Dentsply (DNTL), and Align Technology (ALGN).
- Integrated Postsecondary Education Data System (IPEDS) — dental school enrollment and graduation data, anchoring practitioner supply-pipeline projections.
- Centers for Medicare & Medicaid Services (CMS) — National Health Expenditure Accounts, dental-services line item; Medicare disclosed dental procedure utilization for narrow specialty proxy work.
- State dental licensure board registries — state-level practitioner license counts for due-diligence cross-reference and credentialing context.
Original Private Practice Research datasets
- PPR DSO Events. A trade-press dental service organization acquisition tracker covering disclosed and partially-disclosed DSO transactions, refreshed monthly. Inclusion criteria, source list, and disclosure-tier policy are documented per dataset.
- PPR SEC Dental Segments. Structured extraction of dental-segment disclosures from SEC EDGAR filings of public dental-industry filers (HSIC, PDCO, XRAY, DNTL, ALGN). Provides public-comparable transaction multiples and segment-level financial detail in a queryable form.
Professional-association data
- American Dental Association Health Policy Institute (ADA HPI) — Survey of Dental Practice; U.S. Dentist Workforce series; practice-organization breakdowns. Cited as cross-reference against federal-authority supply-side data, not as standalone primary source.
- American Dental Association — workforce demographics, ADA News reporting, and policy statements.
Industry transaction aggregates (cross-validation only)
The aggregates below are cited where their published methodologies are disclosed. The institute does not treat any single advisory-firm aggregate as a standalone primary source; each is cross-validated against federal-authority financing data (SBA 7(a)) and the institute’s own transaction-tracking datasets at point of use.
- FOCUS Investment Banking — dental industry reports, transaction multiples, M&A activity summaries.
- TUSK Practice Sales — annual market reviews, quarterly transaction reports, deal-volume aggregates.
- Polaris Healthcare Partners — DSO survey and consolidation tracking.
- Large Practice Sales (LPS) — published commentary on IDSO partnership volume and EBITDA-multiple disclosures.
- Association of Dental Support Organizations (ADSO) — industry aggregates on DSO affiliation rates.
Practice operations and benchmarking
- Academy of Dental CPAs (ADCPA) — practice overhead and operating-economics benchmarks.
- ZenOne and peer practice-management research — overhead, collection-rate, and profit-margin benchmarks.
- Dental Economics, Dental Products Report, and peer trade publications — operating-benchmark commentary, attributed to named authors and outlets.
Peer-reviewed and policy literature
- Journal of the American Dental Association (JADA), Journal of Dental Research, Health Affairs, and adjacent peer-reviewed journals — for empirical findings on workforce, access, and the economics of dental practice ownership.
- Working papers and policy briefs from research institutes addressing healthcare-services economics, where the dental sector is treated as a comparator or sub-sector.
Primary qualitative inputs
- Practitioner and advisor interviews — conducted under attribution where the source consents; recorded, transcribed, and quoted to the disclosure standards above. Speaker, outlet, and date are recorded for every quotation used in publication.
- Public conference proceedings and recorded panels — Greater New York Dental Meeting, Hinman Dental Meeting, Yankee Dental Congress, and analogous venues, where commentary is on the record.
Licensed institutional datasets (forthcoming)
The institute will, where the research question warrants, acquire licensed institutional datasets under research-use agreements. Acquired datasets are listed by name and license terms in the publications that draw on them. The institute does not publish from any dataset acquired under terms that prohibit independent re-publication of derived findings.
Validation and disconfirmation
Every numeric claim is verified against its primary source within the same paragraph or table before editorial review. Findings are triangulated across at least three independent series where coverage permits; where two reputable series disagree, both are reported with the spread noted. Each publication includes a section identifying what evidence would refute its central claim. A claim that cannot in principle be refuted by any conceivable evidence is treated as a non-finding, regardless of how confidently it appears elsewhere. The Editor of Record signs the draft with the standing sign-off: I have read this publication in full and can defend every claim in a public conversation.
Forthcoming
The Methodology Review Board is in formation; founding-member appointments will be announced as they are seated. Five quantitative indices — Practice Concentration, Valuation Benchmark, Labor Cost, Scarcity Premium, and Transition Volume — are specified under the PPR Methodology with first publications targeted for Q3 2026. External quarterly review of one randomly selected published article begins with the Q4 2026 publication cycle.
Citation, corrections, and version history
Every publication carries a persistent edition identifier, a suggested citation in academic format, ScholarlyArticle JSON-LD, and a canonical URL that does not change after publication. Errors of fact are corrected in-line on the affected publication with a dated note; material methodology revisions trigger a versioned republication with the prior version preserved at its original URL.