FROM:- MAHSHOOQA SUMAN. ROLL: 49

1. DEVELOPMENTAL DISTURBANCE AFFECTING THE SIZE AND NUMBER OF THE TEETH FROM:- MAHSHOOQA SUMAN. ROLL: 49

2. MICRODONTIA It is defined as the size of teeth which is smaller than normal (or) outside the normal range of teeth size. Microdontia is again divided into 3 types: True Generalized. Relatively Generalized. Involving a Single Tooth. True Generalized:- All the teeth are smaller than normal. Teeth are well formed but small in size. Incidence: Very Rare. Aetiology: Pitutary dwarfism, Downs Syndrome. Relative Generalized type:- Teeth are normal or slightly smaller than normal teeth within the range of size of teeth, but the jaw size is slightly larger than the normal giving an Impression of Microdontia. Aetiology: Inheritance of Jaw size from one parent and the teeth from another parent may lead to this condition. Involving a Single Tooth:- It is also called as localised Microdontia, affecting commonly the Maxillary lateral incissor and the Third Molar.

3. MACRODONTIA Macrodontia is a condition in which any tooth or teeth appear larger than normal for that particular type of tooth. Classification Of Macrodontia:- True Generalized Macrodontia. Relative Generalized Macrodontia. Single Tooth Macrodontia. True Generalized Macrodontia:- All teeth are larger than normal. It is extremely Rare Seen in cases of Pituitary Gigantism Relative Generalized Macrodontia:- Teeth are Slightly Larger than average teeth It is a result of presence of normal or slightly larger than normal teeth in small jaws. The difference in size gives the illusion of Macrodontia A person will inherit Jaw size from one parent and tooth size from the other so we can make out that this can create an illusion of Macrodontia as well as Microdontia.

4. ANODONTIA Anodontia is the congenital absence of teeth and can occur in some or all teeth (partial anodontia or hypodontia), involve two dentitions or only teeth of the permanent dentition. Many denominations are attributed to this anomaly: partial anodontia, hypodontia, oligodontia, the congenital absence, anodontia, bilateral aplasia. The Anodontia of at least one permanent tooth is the most common dental anomaly and may contribute to masticator dysfunction, speech impairmentaesthetic problems, and malocclusion Prosthetic replacement of missing teeth is possible using dental implant technology or dentures.

5. HYPERDONTIA Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth There is evidence of hereditary factors along with some evidence of environmental factors leading to this condition. Many supernumerary teeth never erupt, but they may delay eruption of nearby teeth or cause other dental or orthodontic problems.[3] [4]Molar-type extra teeth are the rarest form. Dental X-rays are often used to diagnose hyperdontia. It is suggested that supernumerary teeth develop from a second tooth bud arising from the dental lamina near the regular tooth bud or possibly from splitting the regular tooth bud itself. Supernumerary teeth in deciduous (baby) teeth are less common than in permanent teeth.

6. NATAL & NEONATAL TEETH The presence of teeth in newborns is uncommon, varying from 1:6000 to 1:800 cases, occurring, in general, of two or three teeth. The teeth or group of teeth which are present at birth are denoted as natal dentition, while neonatal teeth are those which erupt during the first month of life. Clinically, in the majority of cases, both natal and neonatal teeth are characterized by small immature conical dental structures, of a brown-yellowish color, with an undeveloped root. These anomalous aspects permit great mobility, facilitating spontaneous loss or exfoliation, with gingival edema and inflammation, and some bleeding areas.