oral tissues in health and disease dr.shahzadi tayyaba hashmi dnt 243 oral pathology
TRANSCRIPT
ORAL TISSUES IN HEALTH AND DISEASE
Dr.Shahzadi Tayyaba Hashmi
DNT 243ORAL PATHOLOGY
ORAL TISSUES
Intra oral Tissues
Extra oral Tissues
TYPES OF INTRA ORAL TISSUES
INTRA ORAL HARD TISSUES• Teeth• Jaws (maxilla and mandible)• Hard Palate
INTRA ORAL SOFT TISSUES• Gingiva• Tongue• Lips• Buccal mucosa• Labial mucosa• Soft palate• Floor of the mouth• pharynx
EXTRA ORAL TISSUES
•TM joint•Lymph nodes•Head and face•Eyes•Ears•Bones and cartilage•Nose•Blood vessels•Face
HEALTHY ORAL TISSUES
Healthy Oral Cavity Healthy Gingiva (normal pink colour)
UNHEALTHY ORAL TISSUES
Unhealthy /inflamed gingiva(Swollen ,bleeding on probing , red in colour)
Macroglossia(Large tongue)
Supernumerary Teeth(Additional teeth)
TEETH
•Most important Intra oral hard tissue
•Consists of oEnameloDentine oPulp
Requirements for Development of an Ideal Dentition
•Formation of a full complement of teeth.•Normal structural development of the
dental tissues•Eruption of each group of teeth at the
appropriate time into an adequate space•Normal development of jaw size and
relationship•Eruption of teeth into correct relationship
to occlude with their opposite numbers
Disorders of Development of Teeth
1. Abnormalities in Number:oAnodontia or hypodontiaoAdditional teeth (hyperdontia)
2. Defects of Structure:oEnamel defectsoDentine defects
3. Abnormalities in Size:oMicrodontia oMacrodontia
Disorders of Development of Teeth
4. Disorders of Eruption:o Delayed eruptiono Premature eruptiono Impacted teeth
5. Abnormalities in Shape:• Dilaceration• Taurodontism• Dens Invaginatus• Dens Evaginatus• Talon cusp• Supernumerary roots• Gemination• Fusion• Concrescence• Enamel pearls
Abnormalities In Number Of Teeth
1. Anodontia (missing teeth):
a) Total Anodontia: Congenital absence of all teeth is known as total anodontia.Total failure of development of a complete dentition is rare.
b)Partial Anodontia: Congenital absence of one or more teeth is known as
partial anodontia
Examples:• Third molars• Second premolars• Maxillary lateral incisors
Abnormalities In Number of Teeth
2. HYPERDONTIA (ADDITIONAL TEETH):• Additional teeth are relatively common• They are usually of conical shape (supernumerary teeth) but, less
frequently resemble teeth of normal series (supplemental teeth)• These are the results of excessive growth of dental lamina of unknown
cause• supernumerary teeth may prevent the eruption of the a permanent
teeth & also may cause displacement or malposition of teeth
EXAMPLES:• Mesiodens (between maxillary central incisors)• Paramolars (maxillary fourth molars)• Distomolar• Neonatal teeth
EXAMPLES OF SUPERNUMERARY TEETH
Mesiodens Mesiodens
ESSENTIAL REFERENCES
•Oral Pathology for the Dental Hygienist (5th Edition) By Olga A. C. Ibsen, RDH, MS and Joan
•Contemporary for oral and maxillofacial pathology by J.Phillip Sapp, Lewis Roy Eversole
THANK YOU