Tonnis Classification (Hip Osteoarthritis)
Tonnis Classification (Hip Osteoarthritis) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
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What this is
Tonnis Classification (Hip Osteoarthritis) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. Tonnis Classification (Hip Osteoarthritis) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Tonnis D. Congenital Dysplasia and Dislocation of the Hip in Children and Adults. Berlin: Springer-Verlag; 1987. Grades cross-verified against Kovalenko B, et al. Clin Orthop Relat Res. 2018;476(8):1680-1684. Read the source ↗
Worked example: Tonnis grade 2: small subchondral cysts, moderate joint-space narrowing, and moderate loss of femoral-head sphericity; radiographic osteoarthritis.
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