Intra-arch Relationships and Supporting Tooth Structure PDF

Intra-arch Relationships and Supporting Tooth Structure LO: Given a diagram, identify the basic anatomy of the Temporomandibular Joint Mandibular Fossa - on temporal bone Condyle - on mandible - Coronoid process is anterior of it Articular Eminence - anterior of mandibular fossa Articular Disc - sep...

Intra-arch Relationships and Supporting Tooth Structure LO: Given a diagram, identify the basic anatomy of the Temporomandibular Joint Mandibular Fossa - on temporal bone Condyle - on mandible - Coronoid process is anterior of it Articular Eminence - anterior of mandibular fossa Articular Disc - separates articular surfaces of mandibular fossa and condyle LO: Given a set of casts, differentiate occlusal plane, Curve of Spee, and Curve of Wilson Occlusal Plane Seen from buccal view Planar mean of the incisal and occlusal surfaces of natural teeth Curve of Spee Anteroposterior curve of occlusal plane Anatomical line from buccal view Tips of canines → Buccal cusps of posterior teeth Ideal: tips of canines are lower than posterior buccal cusp tips Curve of Wilson Mediolateral curve of occlusal plane Curve seen from a frontal view Curve follows cusp tips LO: Given a setup of anterior teeth, assess the degree of overjet and overbite. Intra-arch Relationships and Supporting Tooth Structure Overjet: horizontal overlap → jets fly horizontally Overbite: vertical overlap → we bite vertically From facial surface of maxillary central incisors → opposing mandibular incisors From maxillary incisal edges → opposing mandibular incisors mm Units % Speech problems, crossbite, edge-to-edge bite Inadequate overlap causes Open bite, lisp Lack of overlap in posteriors → causes cheek biting when chewing Anterior open bite: zero vertical overlap If either overlaps are inadequate → can affect healthy occlusion and normal function