Calcaneal Böhler & Gissane Angles — free guideline decision tool
Lateral calcaneal Böhler and Gissane angles for posterior facet depression (intra-articular fracture), with optional contralateral comparison. Includes how to measure and what each value means. Instant, browser-side.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Contralateral Böhler angle (optional) | 32 ° |
|---|---|
| Böhler angle | 15 ° |
| Critical angle of Gissane | 150 ° |
→Böhler angle15°
- Böhler angle：15 ° → < 20°: posterior facet depression (intra-articular fracture); lower is worse
- Critical angle of Gissane：150 ° → > 145°: increased — posterior facet depression
- Difference vs contralateral：17° (≥ 10°, supports depression)
Common questions
What is Calcaneal Böhler & Gissane Angles?
Lateral calcaneal Böhler and Gissane angles for posterior facet depression (intra-articular fracture), with optional contralateral comparison. Includes how to measure and what each value means. Instant, browser-side.
How is Calcaneal Böhler & Gissane Angles calculated? What is the core formula?
Böhler angle < 20°: posterior facet depression (intra-articular fracture); lower is worse Böhler angle 20–40°: normal Böhler angle > 40°: increased Critical angle of Gissane < 120°: decreased Critical angle of Gissane 120–145°: normal Critical angle of Gissane > 145°: increased — posterior facet depression
When is Calcaneal Böhler & Gissane Angles used?
Foot & ankle imaging: weight-bearing foot and lateral calcaneal views — hallux valgus, flatfoot and calcaneal fracture assessment.
What are the key clinical points for Calcaneal Böhler & Gissane Angles?
Lateral calcaneal radiograph. Each value is graded against published reference ranges. Measurement technique and positioning change the numbers — compare like with like on follow-up. Part of the YuanDoctor MSK measurement topic.
What are the limits and cautions when using Calcaneal Böhler & Gissane Angles?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does Calcaneal Böhler & Gissane Angles upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Calcaneal Böhler & Gissane Angles calculated in practice? Can you show a worked example?
Inputs: Contralateral Böhler angle (optional) 32 °, Böhler angle 15 °, Critical angle of Gissane 150 ° → Result: Böhler angle 15 °（Böhler angle: 15 ° → < 20°: posterior facet depression (intra-articular fracture); lower is worse, Critical angle of Gissane: 150 ° → > 145°: increased — posterior facet depression, Difference vs contralateral: 17° (≥ 10°, supports depression)）
Run Calcaneal Böhler & Gissane Angles now
Lateral calcaneal Böhler and Gissane angles for posterior facet depression (intra-articular fracture), with optional contralateral comparison. Includes how to measure and what each value means. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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