Third Point of Reference in Orientation Jaw Relation

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The orientation of the maxillary cast in an articulator is essential for accurately restoring occlusion and positioning of teeth. It involves setting the maxillary cast based on three distinct reference points that are not collinear: two posterior and one anterior. The horizontal reference plane is established using these points, which helps in measuring posterior anatomical features and mandibular motion. Accurate recording of jaw relations from edentulous patients is crucial for ensuring proper function, speech, appearance, and comfort. Occlusal stability, as highlighted by Yoshiyuki Watanabe, is key for successful prosthetic treatment and requires precise determination of mandibular position. Knowledge of the vertical and horizontal relationships between the mandible and maxillae is vital for placing teeth correctly, especially when constructing complete dentures.