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Figure 1: Reference points and planes. Point -1: Center of the MF. Point -2: Most prominent point on the anterior border of the ramus. Point -3: Deepest point on the anterior border of the ramus. Point -4: Intersecting point of the perpendicular line from the MF to P1. Point -5: Intersecting point of P1 and P3. Point -6: The distal alveolar crest of the most distal molar. Point -7: Mesial alveolar crest of the canine. Point -8: Most prominent posterior point of the condyle. Point -9: Intersecting point of the perpendicular line from the MF to P2. Point -10: Most prominent posterior point at the angle of mandible. Point -11: Intersecting point of P2 and P4. Point -12: Intersecting point of the perpendicular line from the MF to P4. Point -13: Most prominent inferior point at the angle of mandible. Point -14: Most prominent inferior point at the canine area. Plane 1 - (P1): Plane connecting reference points 2 and 3 (ramus anterior plane). Plane 2 - (P2): Plane connecting reference points 8 and 10 (ramus posterior plane). Plane 3 - (P3): Plane connecting reference points 6 and 7 (alveolar crest plane). Plane 4 - (P4): Plane connecting reference points 13 and 14 (mandibular plane).

Figure 1: Reference points and planes. Point -1: Center of the MF. Point -2: Most prominent point on the anterior border of the ramus. Point -3: Deepest point on the anterior border of the ramus. Point -4: Intersecting point of the perpendicular line from the MF to P1. Point -5: Intersecting point of P1 and P3. Point -6: The distal alveolar crest of the most distal molar. Point -7: Mesial alveolar crest of the canine. Point -8: Most prominent posterior point of the condyle. Point -9: Intersecting point of the perpendicular line from the MF to P2. Point -10: Most prominent posterior point at the angle of mandible. Point -11: Intersecting point of P2 and P4. Point -12: Intersecting point of the perpendicular line from the MF to P4. Point -13: Most prominent inferior point at the angle of mandible. Point -14: Most prominent inferior point at the canine area. Plane 1 - (P1): Plane connecting reference points 2 and 3 (ramus anterior plane). Plane 2 - (P2): Plane connecting reference points 8 and 10 (ramus posterior plane). Plane 3 - (P3): Plane connecting reference points 6 and 7 (alveolar crest plane). Plane 4 - (P4): Plane connecting reference points 13 and 14 (mandibular plane).