Dental Anatomy

 lntraarch relationship refers to the alignment of the teeth within an arch 1. In an ideal alignment teeth should contact at their proximal crests of curvature. A continuous arch form is observed in occlusal view Curves of the occlusal plane (a line connecting the cusp tips of the canines, premolars, and molars) are observed from the proximal view   Curve of Spee: anterior to posterior curve; for mandibular teeth the curve is concave and for ma…

MANDIBULAR CUSPIDS Mandibular canines are those lower teeth that articulate with the mesial aspect of the upper canine. Facial: The mandibular canine is noticeably narrower mesidistally than the upper, but the root may be as long as that of the upper canine. In an individual person,the lower canine is often shorter than that of the upper canine. The mandibular canine is wider mesiodistally than either lower incisor. A distinctive feature is the nearly straigh…

The very first histological evidence of tooth development appear during the second month of intrauterine life. Calcification of deciduous incisors begins at 3-4 months in utero.…

Clinical importance of cementum 1) Deposition of cementum continues throughout life. The effects of the continuous deposition of cementum are the maintenance of total length of the tooth (good) and constriction of the apical foramen (bad). 2) With age, the smooth surface of cementum becomes more irregular due to calcification of some ligament fiber bundles. This is referred to as spikes. Behavior of cementum in pathologic conditions…

Types of dentitions: 1. Diphyodont. Teeth develop and erupt into their jaws in two generations of teeth. The term literally means two generations of teeth. 2. Monophyodont. a single generation of teeth. 3. Polyphyodont. Teeth develop a lifetime of generations of successional teeth 4. Homodont. all of the teeth in the jaw are alike. They differ from each other only in size. 5. Heterodont. There is distinctive classes of teeth that are regionally speci…