Nomenclature & Terminology PDF

Nomenclature & Terminology LO: Identify a tooth with either the UNS, IS, or Palmer Notation Universal Numbering System (UNS) 1-32 tooth numbering system - Each tooth has a diff # Start: Maxillary Right - Go contralateral End: Mandibular Right i.e Mandibular LL 1st Molar → #19 International System...

Nomenclature & Terminology LO: Identify a tooth with either the UNS, IS, or Palmer Notation Universal Numbering System (UNS) 1-32 tooth numbering system - Each tooth has a diff # Start: Maxillary Right - Go contralateral End: Mandibular Right i.e Mandibular LL 1st Molar → #19 International System (IS) Mouth split into 4 quadrants - Each quadrant is designated with a number from 1-4 Each tooth in each quadrant assigned 1-8, from mesial to distal - UR: 1 - UL: 2 - LL: 3 - LR: 4 i.e Mandibular LL 1st Molar → 3-6 Palmer Notation Similar to IS, but uses L-shaped symbols to identify the four different quadrants - 1: ⎦ - 2: ⎣ - 3:⎡ - 4: ⎤ I.e Mandibular LL 1st Molar → ⎡6 Primary Dentition 20 baby teeth A→T LO: Identify the terms used to describe surfaces of anterior and posterior teeth. Tooth surface towards median line Mesial Tooth surface away from median line Distal Tooth surface towards tongue In general: Lingual Tooth surface towards lip/cheek Maxillaries: Palatal Anteriors (lip): Labial Facial Posteriors (cheek): Buccal Anterior bite surface Incisal (cut, tear, sheer) Posterior bite surface Occlusal (chew) - Terms used to describe location of an area and also direction to an area Nomenclature & Terminology Landmarks Height of Contour (HOC) Widest part of anatomical crown, that jets out the most Proximal Contacts Part of proximal surface of tooth that meets adjacent tooth mesially/distally Helps preserve continuity of dentition Maintains healthy smile, adds esthetic value Determines shape of surrounding gingival tissue Diastema Natural Space found between teeth Open Contact Technical failure to re-establish a previously existing contact Embrasures “Spillway space” Triangular space between proximal surfaces of adjacent teeth in same arch - Triangular is ideal Cusps Ridges Elevation/mound on tooth Mainly on posterior teeth Lobes fuse together to form cusps Any linear elevation Cingulum Elevation found on lingual surfaces of anterior teeth, on cervical ⅓ Fossae Area of concavity Pits Point, usually where 2 grooves meet Grooves Linear point where fossae meet Mamelons Tiny scallops on incisals of newly erupted teeth → gradually wear away over time Sluiceway/ Spillway Supplemental/secondary grooves → escape paths for food to squeeze out - not as prominent Occlusal Table/ Occlusal Surface Occlusal Outline Boundaries of occlusal surface, formed by cusp ridges and proximal marginal ridges. All posterior teeth have it. Everything seen occlusally, including other surfaces Nomenclature & Terminology Line Angle: an angle formed when two diff surfaces planes meet Point Angle: where all three surface planes converge together Anterior Tooth R O O T Apical ⅓ apex of root Middle ⅓ Cervical ⅓ C R O W N Cervical ⅓ Middle ⅓ Incisal ⅓ Biting edge Posterior Tooth C R O W N R O O T Occlusal ⅓ Biting edge Middle ⅓ Cervical ⅓ boundary between enamel of crown & cementum of root Cervical ⅓ Middle ⅓ Apical ⅓