"Dental Anatomy" 1 st Lab

Dental anatomy: the study of the development, morphology, function, and identity of each of the teeth in the human dentitions, as well as the way in which the teeth relate in shape, form, structure, color and function to the other teeth in the same dental arch and to the teeth in the opposing arch.

Maxillary: refers to the upper jaw or maxilla. Mandibular : refers to the lower jaw or mandible.

Midline: an imaginary line dividing the maxillary and mandibular arches into two equal halves.

Anterior: refers to direction towards the front plane of the body. Posterior: refers to direction towards the back plane of the body.

Maxillary teeth : teeth arranged in upper arch. Mandibular teeth : teeth arranged in lower arch.

Quadrants : Four in entire mouth: A.Upper right. B.Upper left. C.Lower left. D.Lower right.

Occlusion : when the upper teeth come in contact with the lower teeth

Dentition : the teeth in the dental arch in the mouth. Dentitions either: 2. Permanent, succedaneous teeth1. Deciduous,primary, temporary, milk, baby teeth.

1. Deciduous,primary, temporary, milk, baby teeth:

2. Permanent, succedaneous teeth:

Tooth Surfaces: crown of all teeth have five surfaces, which are; 1. Facial surface : (Labial surface,Buccal surface). 2. Lingual surface (Palatal surface). 3. Mesial surface. 4. Distal surface. 5. Incisal surface, Occlusal surface Proximal surface

1. Facial surface : in general it's called on the front surface of anterior and posterior teeth in upper and lower arches, its either:  Labial surface: the surface in the anterior teeth only (incisors and canines) that are towards lips.  Buccal surface : the surface in the posterior teeth only (premolars and molars) that face cheeks.

2. Lingual surface (Palatal surface). it's called on the surface opposite to facial surface of each tooth from inner side of the mouth) it's called:  Lingual surface: surface facing towards tongue (in upper and lower arches).  Palatal surface: surface facing the palate (in upper arch only).

Proximal surface ; its called on both mesial and distal surface of the tooth; 3- Mesial surface: called on the surface towards midline. 4- Distal surface: called on the surface away from midline.

5- Incisal surface, Occlusal surface Incisal surface : called on the anterior teeth surface (incisors and canines) that come in contact with those in the opposite jaws during the act of closure. Occlusal surface : called on the posterior teeth surface(premolars and molars) that come in contact with those in opposite jaw during act of closure.

Tooth line angle and point angle:  Line angle : two surfaces of a tooth meet.  Point angle: three surfaces of a tooth meet.

Line angles of anterior teeth: 1. Mesio-labial 2. Disto-labial 3. Mesio-lingual 4. Disto-lingual 5. Labio-incisal 6. Linguo-incisal

Line angles of posterior teeth: 1. Mesio-buccal 2. Disto-buccal 3. Mesio-lingual 4. Disto-lingual 5. Mesio-occlusal 6. Disto-occlusal 7. Bucco-occlusal 8. Linguo-occlusal

Point angles of anterior teeth 1. Mesio-labio-incisal 2. Disto-labio-incisal 3. Mesio-linguo-incisal 4. Disto-linguo-incisal

Point angles of posterior teeth: 1. Mesio-bucco-occlusal 2. Disto-buccal-occlusal 3. Mesio-lingual-occlusal 4. Disto-linguo-occlusal

*Tooth numbering equation Dentition + Arch + Side + Tooth name Deciduous Or Permanent Maxillary Or Mandibular Right Or Left Central incisor Lateral incisor Canine First premolar Second premolar First molar Second molar Third molar

Tooth notation systems 1. Zsigmondy/Palmer notation system.  In by Zsigmondy then modified by Palmer, is a four quadrant symbolic system.

 Deciduous  Permanent

Training:

2- Universal notation system -In 1968 by ADA ( Tooth number prior by # )  Deciduous  Permanent

Training: # L = # 26 = # R = # 11 = # I = # 5 = # O = # 24 = # B = # 14 = # H = # 32 = # M = # 21 = # F = # 1 = # S = # 18 = # Q = # 7 =

3- FDI system (Two digits system) Adopted by WHO and IADR.  Deciduous; for example; 5 1 so 5 represent the quadrant of that tooth 1 represent the tooth name

 Permanent 3- FDI system (Two digits system) Adopted by WHO and IADR.

Training: 72 = 13 = 63 = 36 = 54 = 22 = 83 = 43 =

1 st Lab done Thank you for Browsing