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Definition of the landmarks_17
| Landmark | Definition |
|---|---|
| Bilateral Landmarks | |
| CL, CR | The deepest point of the gingival crevice on the palatal surface of the canine. If there was gingival recession and the cemento-enamel junction was visible, this was defined as the deepest point of the cemento-enamel junction. If the canines were malpositioned, the tooth in the more correct position within the dental arch was used. |
| ML, MR | The deepest point of the gingival crevice or the cemento-enamel junction on the palatal surface of the first molar. If there was gingival recession and the cemento-enamel junction was visible, this was defined as the deepest point of the cemento-enamel junction. |
| Midline Landmarks | |
| IP | The tip of the incisive papilla. |
| CM | The point on the palatal raphe between the CL and CR landmarks, indicated while viewing the casts perpendicular to the anterior-incisal-occlusal plane. |
| MM | The point on the palatal raphe, between the ML and MR landmarks indicated while viewing the casts perpendicular to the anterior-incisal-occlusal plane. |