By:Ahmed Albayati UG:1330089 STRUCTURE OF TOOTH
By:Ahmed Albayati
UG:1330089
STRUCTURE OF TOOTH
Parts of Tooth• Crown – top portion of the tooth covered by enamel.
– Clinical crown - portion of the tooth that is visible in the mouth.
– Anatomical crown – the total portion of the crown that is covered by the enamel.
• Root – bottom part of the tooth; may be single-, double-, or triple-root.– Clinical root – portion of the root covered by the gingival
(gum) tissue.– Anatomical root – total portion of the root covered by the
cementum.
Parts of Tooth
• Cervix – neck – the neck of the tooth at the cementoenamel junction.
• Apex – the anatomic area at the end of the tooth root.
Tissues of the Tooth
• Enamel – the hard tissue that covers the crown portion of the tooth (hardest substance in the body).
• Dentin – the material forming the main inner portion of the tooth structure.
• Cementum – the substance covering the root surface of the tooth.
Tissues of the Tooth
• Pulp – the vital tissues of the tooth consisting of nerves, blood vessels, and connective tissue.– Pulp chamber – open area in center of tooth,
found in the crown area; place for the pulpal tissues.
– Pulp canal – small canal in the center of the root, containing the pulpal vessels.
Title
DISEASES OF Tissues of the Tooth
• Dental Caries:• refer to tooth decay, which occurs when specific
types of bacteria produce acid that destroys the tooth’s enamel and its underlying layer, the dentin
DISEASES OF Tissues of the Tooth
• pulpitis is inflammation of the dental pulp resulting from untreated caries, trauma, or multiple restorations. Its
principal symptom is pain. • Pulpitis is designated as• Reversible: Pulpitis begins as
limited inflammation, and the tooth can be saved by a simple filling.
• Irreversible: pulp damage is extensive and cannot be reversed. The only way dentists can stop the pain is by removing the pulp via root canal treatment
Tissues surrounding the Teeth
• Alveolar process – the extension of the maxilla and mandible that surrounds and supports the teeth to form the dental arches.
• Alveolar bone – the part of the alveolar process that lines the bony sockets into which the roots of the teeth are embedded.
Tissues surrounding the Teeth
• Periodontal ligament – dense connective tissue organized into fiber groups that connects the cementum covering of the root of the tooth with the alveolar bone of the socket wall.
• Gingiva – the mucous membrane tissue that immediately surrounds the tooth.
• Free (marginal) gingiva• Interdental Gingiva (Papilla)• Attached gingiva
Tissues surrounding the Teeth
Diseases of gum
• Periodontal disease:• Gingivitis :is a common and
mild form of gum disease that causes irritation, redness and swelling (inflammation) of your gums.
• Gingivitis can lead to much more serious gum disease (periodontitis): s a serious gum infection that damages the soft tissue and destroys the bone that supports your teeth.
Surfaces of the Teeth
• Facial – pertaining to the surface of the cheek and lips (face).– Labial – pertaining to the lips: anterior surface
of the anterior teeth.– Buccal – pertaining to the cheek: surface of
the posterior teeth touching the cheek.• Lingual – surface of the tooth or area
touching the tongue.
Surfaces of the Teeth• Incisal edge – cutting edge of the anterior
teeth.• Occlusal – chewing surface of the posterior
teeth.• Proximal – side wall of tooth which meet with
or touches the side wall of another tooth.– Mesial – to the middle: side surface closest to the
middle of the face.– Distal – pertaining to the far or away side: side
farthest from the midline of the face.
Important Oral Cavity Structures
Leukoplakia
Fissured Tongue
Irritation Fibroma
Hairy Tongue
Salivary Stone
Gingival Fibrous Hyperplasia