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Mandibular Movement By S. Wanachantararak Types of Movement • Rotational movement – Horizontal axis of rotation – Frontal (vertical) axis of rotation – Sagittal axis of rotation • Translational movement Rotational Movement • Around the horizontal axis Rotational Movement • Around the frontal (vertical) axis Rotational Movement • Around the sagittal axis Translational movement Single Plane Border Movement • Sagittal plane border and functional movement • Horizontal plane border and functional movement • Frontal (vertical) border and functional movement Sagittal Plane Border Movement Sagittal Plane Border Movement • Posterior open border • Anterior open border • Superior contact border • Functional movements Sagittal Plane Border Movement • Posterior open border movement Sagittal Plane Border Movement • Anterior open border movement Sagittal Plane Border Movement • Superior contact border movement Sagittal Plane Border Movement • Superior contact border movement (cont.) Sagittal Plane Border Movement • Superior contact border movement (cont.) Sagittal Plane Border Movement • Superior contact border movement (cont.) Sagittal Plane Border Movement • Functional movements Horizontal Plane Border Movement • Left lateral border • Continued left lateral border with protrusion • Right lateral border • Continued right lateral border with protrusion • Functional movements Horizontal Plane Border Movement • Left lateral border Horizontal Plane Border Movement • Continued left lateral border with protrusion Horizontal Plane Border Movement • Right lateral border Horizontal Plane Border Movement • Continued right lateral border with protrusion Horizontal Plane Border Movement • Functional movements Frontal (Vertical) Border and Functional Movement • Left lateral superior border • Left lateral opening border • Right lateral superior border • Right lateral opening border • Functional movements Frontal (Vertical) Border and Functional Movement Frontal (Vertical) Border and Functional Movement • Left lateral superior border Frontal (Vertical) Border and Functional Movement • Left lateral opening border Frontal (Vertical) Border and Functional Movement • Right lateral superior border Frontal (Vertical) Border and Functional Movement • Right lateral opening border Frontal (Vertical) Border and Functional Movement • Functional movements References • Ash and Ramfjord. Occlusion 4th edition. W.B. Saunders Company, 1995 • Mohl, Zarb, Carlsson and Rugh. A textbook of Occlusion. Quintessence Publishing Co., 1998 • Sicher and DuBrul. Oral Anatomy 6th edition. The C.V. Mosby company, 1975 • Kraus, Jordan and Abrams. Dental anatomy and Occlusion. The Williams and Wilkins company, 1969 Thank you
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