Dental Anatomy

Stationary Relationship a) .Centric Relation is the most superior relationship of the condyle of the mandible to the articular fossa of the temporal bone as determined by the bones ligaments. and muscles of the temporomandibular joint; in an ideal dentition it is the same as centric occlusion. (b) Canines may also be used to confirm the molar relationships to classify occlusion when molars are missing; a class I canine relationship shows the cusp tip of the ma…

THE DECIDUOUS DENTITION   I. The Deciduous Dentition -It is also known as the primary, baby, milk or lacteal dentition. diphyodont, that is, with two sets of teeth. The term deciduous means literally 'to fall off.'   There are twenty deciduous teeth that are classified into three classes. There are ten maxillary teeth and ten mandibular teeth. The dentition consists of incisors, canines and molars.…

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.…

  Dentin 1. Composition a. Inorganic (70%)—calcium hydroxyapatite crystals. b. Organic (30%)—water and type I collagen.   2. Types of dentin a. Primary dentin (1) Dentin formed during tooth development, before completion of root formation. It constitutes the majority of dentin found in a tooth. (2) It consists of a normal organization of dentinal tubules. (3) Circumpulpal dentin (a) The layer of primary denti…

AGE CHANGES Progressive apical migration of the dentogingival junction. Toothbrush abrasion of the area can expose dentin that can cause root caries and tooth mobility. Histology of the alveolar bone   Near the end of the 2nd month of fetal life, mandible and maxilla form a groove that is opened toward the surface of the oral cavity. As tooth germs start to develop, bony septa form gradually. The alveolar process starts developing strictly during …