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MDA Ch. 8

Modern Dental Assisting, Bird, 10th Edition

TermDefinition
Cementoblasts (se-MEN-toe-blasts) Cells that form cementum.
Cementoclasts (se-MEN-toe-klasts) Cells that resorb cementum.
Cementum Specialized, calcified connective tissue that covers the anatomic root of the tooth.
Clinical crown That portion of the tooth that is visible in the oral cavity.
Conception Union of the male sperm and the female ovum.
Coronal pulp Part that lies within the crown portion of the tooth.
Cortical plate Dense outer covering of spongy bone that makes up the central part of the alveolar process.
Dental lamina Thickened band of oral epithelium that follows the curve of each developing arch.
Dental papilla Gingivae between the teeth.
Dental sac Connective tissue that envelops the developing tooth.
Dentin Hard portion of the root that surrounds the pulp and is covered by enamel on the crown and by cementum on the root.
Dentinal fiber Fibers found in dentinal tubules.
Dentinal tubules Microscopic canals found in dentin.
Deposition The process by which the body adds new bone.
Embryo An organism in the earliest stages of development.
Embryology (em-bree-OL-uh-jee) The study of prenatal development.
Embryonic (em-bree-ON-ik)period Stage of human development that occurs from the beginning of the second week to the end of the eighth week.
Enamel lamellae Thin, leaflike structures that extend from the enamel surface toward the detinoenamel junction and consist of organic material with little mineral content.
Enamel organ Part of a developing tooth destined to produce enamel.
Enamel spindles The ends of odontoblasts (dentin-forming cells) that extend across the detinoenamel junction a short distance into the enamel.
Enamel tufts The hypocalcified or uncalcified ends of groups of enamel prisms that start at the dentinoenamel junction that may extend to the inner third of the enamel.
Exfoliation (eks-foe-lee-AY-shun) The normal process of shedding the primary teeth.
Fetal period Stage of human development that starts at the beginning of the ninth week and ends at birth.
Fibroblast Type of cell in connective tissue responsible for the formation of the intercellular substance of pulp.
Gestation (jes-Tay-shun) Stage of the human development that starts at fertilization and ends at birth.
Histology (his-TOL-uh-jee) The study of the structure and function of body tissues on a microscopic level.
Hunter-Schreger bands Alternating light and dark bands in the enamel that are produced when enamel prisms intertwine or change direction.
Hydroxyapatite Mineral compound that is the principal inorganic component of bone and teeth.
Hyoid arch The second branchial arch, which forms the styloid process, stapes of the ear, stylohyoid ligament, and part of the hyoid bone.
Lamina dura Thin, compact bone that lines the alveolar socket; also known as the cribriform plate.
Lining mucosa Mucous membrane that covers the inside of the cheeks, vestibule, lips, soft palate, and underside of the tongue and acts as a cushion for underlying structures.
Mandibular (man-DIB-yoo-lur) arch The lower jaw.
Masticatory (MAS-ti-kuh-tor-ee) mucosa Oral mucosa that covers the hard palate, dorsum of the tongue, and gingiva.
Meiosis (mye-OE-sis) Reproductive cell production that ensures the correct number of chromosomes.
Modeling Bone changes that involve deposition and resorption of bone and occur along articulations as they increases in size and shape to keep up with the growth of surrounding tissues; also known as displacement.
Odontoblasts (o-DON-to-blasts) Cells that form dentin.
Odontogenisis (o-don-toJEN-eh-sis) Formation of new teeth.
Osteoblasts (OS-tee-oe-blasts) Cells that form bone.
Osteoclasts (OS-tee-oe-klasts) Cells that resorb bone.
Periodontium (per-ee-oe-DON-shee-um) Structures that surround, support, and are attached to the teeth.
Preimplantation period Stage of development that occurs during the first week after fertilization.
Prenatal (pree-NAY-tul) development Stage of human development that starts at pregnancy and ends at birth.
Primary cementum Cementum that covers the root of the tooth and is formed outward from the cementodentinal junction for the full length of the root.
Primary dentin Dentin that forms before eruption and that makes up the bulk of the tooth.
Primary palate The shelf that separates the oral and nasal cavities.
Prism A calcified column or rod.
Pulp chamber The space occupied by pulp.
Radicular pulp The other portion of pulp known as root pulp.
Remodeling Growth and change in shape of existing bone that involves deposition and resorption of bone.
Resorption (ree-SORP-shun) The body's processes of eliminating existing bone or hard tissue structure.
Secondary cementum Cementum that is formed on the apical half of the root; also known as cellular cementum.
Secondary dentin Dentin that forms after eruption and continues at very slow rate throughout the life of the tooth.
Secondary palate The final palate formed during embryonic development.
Specialized mucosa Mucous membrane on the tongue in the form of lingual papillae, which are structures associated with sensations of taste.
Stomodeum The primitive mouth.
Stratified squamous (SKWA-mus) epithelium Layers of flat, formed epithelium.
Striae of Retzius Incremental rings that represent variations in deposition of the enamel matrix during tooth formation.
Succedaneous (suk-se-DAY-ne-us) teeth Permanent teeth that replace primary teeth.
Tertiary dentin Dentin that forms in response to irritation and appears as a localized deposit on the wall of the pulp chamber; also known as reparative dentin.
Tooth buds Enlargements produced by the formation of dental lamina.
Zygote Fertilized egg.
Created by: mortiz09