Dental Anatomy

MORPHOLOGY OF THE DECIDUOUS TEETH   Deciduous Anterior Teeth.  -The primary anteriors are morphologically similar to the permanent anteriors. -The incisors are relatively simple in their morphology. -The roots are long and narrow. -When compared to the permanent incisors, the mesiodistal dimension is relatively larger when compared to axial crown length -At the time of eruption, mamelons are not present in deciduou…

CEMENTUM vs. BONE Cementum simulates bone 1) Organic fibrous framework, ground substance, crystal type, development 2) Lacunae 3) Canaliculi 4) Cellular components 5) Incremental lines (also known as "resting" lines; they are produced by continuous but phasic, deposition of cementum) Differences between cementum and bone 1) Cementum is not vascularized 2) Cementum has minor ability to remodel 3) Cementum is more resistant to resorption compar…

Alveolar bone (process) 1. The bone in the jaws that contains the teeth alveoli (sockets). 2. Three types of bone : a. Cribriform plate (alveolar bone proper) (1) Directly lines and forms the tooth socket. It is compact bone that contains many holes, allowing for the passage of blood vessels. It has no periosteum. (2) Serves as the attachment site for PDL (Sharpey’s) fibers. (3) The tooth socket is constantly being remodeled in response to oc…

The pre-dentition period. -This is from birth to six months. -At this stage, there are no teeth. Clinically, the infant is edentulous -Both jaws undergo rapid growth; the growth is in three planes of space: downward, forward, and laterally (to the side). Forward growth for the mandible is greater. -The maxillary and mandibular alveolar processes are not well developed at birth. -occasionally, there is a neonatal tooth present at birth. It is a supern…

Maxillary First Deciduous Molar. -The notation is B or I. -It looks a bit like an upper 1st premolar. -There are three roots. -It has a strong bulbous enamel bulge that protrudes buccally at the mesial. -It is the smallest of the deciduous molars in crown height and in the mesiodistal dimension.…