Download Embryology and Histology: Dental 2024-2025 Questions and Answers and more Exams Nursing in PDF only on Docsity! Embryology And Histology Dental 2024-2025. Questions & Correct Answers. Graded A+ ___________ is the term used to refer to a developmental anomaly characterized by teeth that are smaller than normal. - ANSMesiodens A mesiodens is a supernumerary (extra) maxillary central incisor located in the midline. Succedaneous teeth include all of the permanent teeth except the molars ___________ is the term used to refer to dentin formed by odontoblasts before the formation of the apical foramen. - ANSPrimary dentin Primary dentin accounts for the vast majority of dentin in the tooth and is the most abundant material of the tooth overall. Primary dentin is formed first and the dentin formed before apex formation. ___________ is the term used to refer to primitive oral cavity found in the embryo. - ANSStomodeum The stomodeum arises from the rupture of the oropharyngeal membrane during the fourth week of development. As a result of periodontal disease, the patient's "gums" have receded apically, making the tooth appear much longer. What will be longest, if measured? - ANSClinical crown The more that the gums recede apically, the longer the clinical crown will appear. The length of the anatomic crown will not be affected by changes in gum position. There is no such thing as a clinical root. The _________ stage of tooth development is characterized by specialization of the cells of the enamel organ (into ameloblasts) and dental papilla (into odontoblasts). - ANSBell The bell stage is characterized by specialization of the cells of the enamel organ (into ameloblasts) and dental papilla (into odontoblasts). This is in preparation for the appositional stage when these specialized cells lay down organic tooth matrix. The ________________ is the embryonic layer responsible for dentin formation. - ANSMesoderm The mesodem gives rise to the dental papilla that forms both dentin and pulp. Ectodermal cells form the enamel organ and are responsible for enamel formation. Endodermal cells form the digestive system. The periodontal ligament (PDL) is classified into groups by the structures to which the fibers of the PDL extend. - ANSTrue The PDL consists of numerous groups of fibers, including the periodontal fiber group (extending from alveolar bone to cementum), the transseptal fiber group (extending between adjacent teeth above the crest of the bone), and the gingival fiber group (extending from the cementum into the gingival tissues). The term that means "associated with the root of the tooth" is: - ANSRadicular The term radicular is used to indicate that a structure has something to do with the root of the tooth. Radicular dentin, for example, is dentin located in the root of the tooth. Coronal
