Successful Dentures Part II - Removable Prosthodontics

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Anatomy in Relation to Complete Dentures Edentulous Mandible Anatomy in Relation to Complete Dentures Edentulous Mandible g b l f j k c a d i h e a. Labial frenum b. Buccal frenum c. Lingual frenum d. Labial vestibule e. Buccal vestibule f. Residual alveolar ridge g. Buccal shelf h. Retromolar pad i. Pterygomandibular raphe j. Mylohyoid ridge k. Alveololingual sulcus l. Retromylohyoid space g b l f j k c a d i h e a. Labial frenum •Fold of mucous membrane •Does not contain muscle b. Buccal frenum •Overlies depressor anguli oris (VII) •Movable by the buccinator and orbicularis oris (VII) resulting in a wide notch in the denture c. Lingual frenum •Overlies genioglossus muscle (XII) Anatomy in Relation to Complete Dentures Edentulous Mandible Anatomy in Relation to Complete Dentures Edentulous Mandible Denture bearing areas g b l f j k c a d i h e d. Labial vestibule e. Buccal vestibule •Entire periphery of denture must end in soft tissues •Stability of denture must come from the maximum use of all bony foundations where tissues are firmly and closely attached to bone g b l f j k c a d i h e f. Residual alveolar ridge g. Buccal shelf •Bounded laterally by the external oblique ridge and medially by the crest of the ridge •Attachment of buccinator muscle (VII) •Buccal flange rests upon buccinator and should extend as far as the tissues permit •Masseter muscle (V3) may crowd buccinator forward against the denture causing an indentation at the DB angle Anatomy in Relation to Complete Dentures Edentulous Mandible g b l f j k c a d i h e h. Retromolar pad •Contains: •Retromolar gland •Pterygomandibular raphe •Buccinator muscle •Temporal tendon •Underlying basal bone is resistant to resorption •Coverage will provide some border seal i. Pterygomandibular raphe •Extends from the pterygoid hamulus superiorly to the alveolar ridge inferiorly under the retromolar gland Anatomy in Relation to Complete Dentures Edentulous Mandible g b l f j k c a d i h e j. Mylohyoid ridge •Attachment of mylohyoid muscle (V3) which forms the muscular floor of the mouth •Fibers are almost horizontal in front of the hyoid where they join those of the opposite side to form a raphe •At the level of the hyoid they pass almost vertically downward to insert into the hyoid k. Alveololingual sulcus •Slopes toward the tongue to permit action of the mylohyoid •Length of flange distally compared to anteriorly is greater owing to the changed length and direction of the mylohyoid fibers
Anatomy in Relation to Complete Dentures Edentulous Mandible Panoramic Radiograph g b l f j k c i h e l. Retromylohyoid space •DL extension determined by styloglossus (XII) •Posterolateral extension determined by superior pharyngeal constrictor (X) and palatoglossus (X) •Overextension may cause pain on swallowing a d Mandibular Condyle Coronoid Process of mandible Glenoid Fossa Maxillary Tuberosity Nasal Septum Pterygomaxillary Fissure EAM Articular Eminence Anterior Nasal Spine Hard Palate Orbit Zygomatic Arch Maxillo-Mandibular Relationship Pharynx Lip Lines Earlobe Mental Foramen Mandibular Foramen Shadow of tongue Styloid Process Symphysis Mandibular Canal External Oblique Ridge Cervical Vertebrae Hyoid Bone Facial Artery Notch Maxillary Relations Incisal Display Dental Midline Occlusal Plane Orientation Facebow Maxillary Relations Natural Dentition Incisal edge of central incisor in relation to the lip line at rest Young woman – 3 mm below lip line at rest Young man – 2 mm below lip line at rest Middle age – 1.5 mm below lip line at rest Elderly (>80) – 0 mm below to 2 mm above lip line at rest Incisal Display at Rest Rest After Wax Adjustment Maximum Smile After Wax Adjustment
Page 1 and 2: Secrets to Successful Dentures Part
Page 3: Anatomy in Relation to Complete
Page 7 and 8: Mandibular Relations Vertical Dime
Page 9 and 10: Anterior Tooth Selection Shape Ante
Page 11 and 12: Anterior Tooth Arrangement General
Page 13 and 14: General Concepts of Denture Occlusi
Page 15 and 16: Non-Anatomic Occlusion Is ‘Balanc
Page 17 and 18: Maxillary Posterior Tooth Arrangeme
Page 19 and 20: External-hex and Internal-hex Exte
Page 21 and 22: Locator Selection Locator Abutment
Page 23 and 24: Direct Pickup Direct Pickup Choose

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