Dental Anatomy Unit 2
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Created by:
JWTruthGirl on September 11, 2008
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48 terms
Terms | Definitions |
|---|---|
 What are the three major functions of teeth? | Mastication, Esthetics, Phonetics |
| Periodontium | The hard and soft supporting tissues of a tooth |
| What are the characteristics of the most primitive teeth? | Conical in shape and composed of one cone or lobe; homodont and can only move their jaw up and down |
| Tritubercular | Three-lobed/cusped tooth |
| Lobe | A primary division of the tooth |
| Permanent Anterior Teeth Lobes | 3 labial: Mesiolabial, Middle Labial, Distolabial and 1 Cingulum Lobe: Lingual Lobe |
| Permanent Posterior Teeth Lobes | 3 Buccal: Mesiobuccal, Middle Buccal, Distobuccal and 1 Lingual: Lingual |
| Permanent Maxillary Molar Lobes | 2 Buccal: Mesiobuccal, Distobuccal and 2 Lingual: Mesiolingual, Distolingual |
| Permanent Mandibular First Molar Lobes | 5 lobes named for the cusps with the addition of the distal lobe |
| Curve of Spee | Curves upwards from anterior to posterior |
| Curve of Wilson | The medio-lateral curve of the occlusal plane of posterior teeth |
| Maxillary Anterior Incisor Root Inclination | Mesiolingual |
| Maxillary Canine Root Inclination | Distolingual |
| Maxillary Molar Root Inclination | Mesiolingual |
| Mandibular Anterior Incisor Root Inclination | Straight |
| Mandibular Premolar Root Inclination | 1PM Distolingual; 2 PM Distobuccal |
| Mandibular Molar Root Inclination | Distobuccal |
| What is the shape of the teeth from the faciolingual direction? | Trapezoidal with the small on the bottom and big on top |
| What is the shape of the anterior teeth from the proximal view? | Triangular |
| What is the shape of the Maxillary posterior teeth from the proximal view? | Trapezoidal with the big on the bottom and the small on top |
| What is the shape of the mandibular posterior teeth from the proximal view? | Rhomboidal |
| Embrasure | The open space between the proximal surfaces of two adjacent teeth in the same arch and are names according to their location; dependent on interproximal spaces |
| Embrasure Naming | From the facial/lingual view: Incisal/Occlusal, Cervical/Gingival; From the Incisal/Occlusal view: Labial/Buccal, Lingual |
| What are the 2 physiological purposes for proper embrasure? | To serve as a spillway for food and an integral part of the self-cleaning of teeth |
| General Rules for Embrasure: Facial/Lingual Aspect | Incisal/Occlusal and Cervical/Gingival embrasures increase in size toward posterior |
| Rules for Embrasure: Incisal Aspect | Labial/Lingual embrasures are equal in size to anterior |
| Rules for Embrasure: Occlusal Aspect | Lingual embrasure is larger than buccal embrasure in posterior |
| Height of Contour/Crest of Curvature | The greatest area of contour inciso(occluso) cervically on the facial and lingual surfaces |
| Heights of Contour: Facial | Located in cervical third |
| Heights of Contour: Anterior Lingual | Located in the cervical third |
| Heights of Contour: Posterior | Located in the occlusal third |
| Gingival Line/Margin/Crest | The imaginary line which marks the level of termination of the nonattached soft tissue surrounding the tooth |
| Epithelial Attachment | The actual attachment of the soft tissue of the mouth to the tooth |
| Depth of Curvature | Related to the widths and lengths of the crown and the location of the contact areas proximally |
| Rule for Cervical Line Contours | The facial/lingual CEJ curves apically and the mesial/distal CEJ toward incisal |
| Rule for Direction of Curvature | Greater on the mesial as compared to the distal |
| Rule for Depth of Curvature | Lines on adjacent proximal surfaces have the same depth of curvature; Greatest on central incisors and decreases posteriorly |
| Marginal Ridge Rule | The marginal ridge height of adjacent teeth should be the same; The shape should create a small occlusal/incisal embrasure |
| Central Groove Rule | The central grooves should form a continuous line on posterior teeth |
| Occlusal Anatomy | The groove and ridge pattern on the masticating surface |
| Anterior/Premolar Roots | Single root |
| Maxillary Molar Roots | Three roots |
| Mandibular Molar Roots | Two roots |
| Which tooth has the strongest root? | The canine |
| What is the most highly developed tooth? | Four or more lobes and only belong to primates |
| Sphere of Monson | 3D combination of the Curve of Spee and Curve of Wilson |
| Mandibular Canine Root Inclination | Distolingual |
| Maxillary Premolar Root Inclination | Distolingual |
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