Glenoid Bone Loss & Glenoid Track (On / Off-Track) — free guideline decision tool
Best-fit circle on en-face CT gives glenoid bone loss %; with the Hill-Sachs interval it determines on-/off-track and distance to dislocation (DTD). 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.
| Best-fit circle diameter D | 26 mm |
|---|---|
| Anterior defect width d | 4 mm |
| Hill-Sachs interval HSI (optional) | 15 mm |
→Glenoid bone loss15.4%
- Glenoid bone loss：15.4 % → 13.5–20%: subcritical (higher failure of isolated Bankart)
- Glenoid track：0.83 × 26 − 4 = 17.6 mm
- Track status：On-track (HSI 15 ≤ 17.6 mm)
Common questions
What is Glenoid Bone Loss & Glenoid Track (On / Off-Track)?
Best-fit circle on en-face CT gives glenoid bone loss %; with the Hill-Sachs interval it determines on-/off-track and distance to dislocation (DTD). Includes how to measure and what each value means. Instant, browser-side.
How is Glenoid Bone Loss & Glenoid Track (On / Off-Track) calculated? What is the core formula?
Glenoid bone loss < 13.5%: minor Glenoid bone loss 13.5–20%: subcritical (higher failure of isolated Bankart) Glenoid bone loss ≥ 20%: critical — consider bone block (eg, Latarjet; some use 25%)
When is Glenoid Bone Loss & Glenoid Track (On / Off-Track) used?
Shoulder imaging: true AP, Y view and 3D CT — rotator cuff disease and instability reporting and procedure selection.
What are the key clinical points for Glenoid Bone Loss & Glenoid Track (On / Off-Track)?
3D CT en-face view of the glenoid with the humeral head subtracted (or oblique sagittal). 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 Glenoid Bone Loss & Glenoid Track (On / Off-Track)?
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 Glenoid Bone Loss & Glenoid Track (On / Off-Track) 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 Glenoid Bone Loss & Glenoid Track (On / Off-Track) calculated in practice? Can you show a worked example?
Inputs: Best-fit circle diameter D 26 mm, Anterior defect width d 4 mm, Hill-Sachs interval HSI (optional) 15 mm → Result: Glenoid bone loss 15.4 %（Glenoid bone loss: 15.4 % → 13.5–20%: subcritical (higher failure of isolated Bankart), Glenoid track: 0.83 × 26 − 4 = 17.6 mm, Track status: On-track (HSI 15 ≤ 17.6 mm)）
Run Glenoid Bone Loss & Glenoid Track (On / Off-Track) now
Best-fit circle on en-face CT gives glenoid bone loss %; with the Hill-Sachs interval it determines on-/off-track and distance to dislocation (DTD). Includes how to measure and what each value means. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.