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The sign convention of force/moment measurement system
| Component | Definition | Sign convention |
|---|---|---|
| Force (X) | Mesiodistal | (+) Mesial, (–) distal |
| Force (Y) | Buccolingual | (+) Buccal, (–) lingual |
| Force (Z) | Occlusogingival | (+) Occlusal, (–) gingival |
| Moment (X) | Inclination | (+) Buccal, (–) lingual |
| Moment (Y) | Angulation | (+) Mesial, (–) distal |
| Moment (Z) | Rotation | (+) Distal, (–) mesial |
