Dental hygiene board review Questions and Answers 100% Pass

2 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. C. Foramen ovale D. Foramen rotundum - ANSWER -A. incisive foramen Which muscle retracts the tongue? - ANSWER -Styloglossus Which plane of dissection divides the body into anterior and posterior portions? - ANSWER -Frontal Teeth # 3 and # 14 are - ANSWER -contralateral to each other The following characteristics describe muscle tissue EXCEPT one. Which one is the EXCEPTION? A. Each muscle has two ends B. Muscle cells are called sarcomeres C. Muscles are categorized according to their role in movement D. The muscle origin is attached the least movable part E. The muscle insertion is attached to the most movable part - ANSWER -B. Muscle cells are called sarcomeres. Which lymph nodes drain both sides of the chin, the lower lip, the floor of the mandibular incisors? - ANSWER -Submental Which endocrine gland matures T-lymphocytes for the immune system and undergoes involution (reduces in size) after puberty? - ANSWER -Thymus The corrugator supercilii is a muscle of facial expression in which region? - ANSWER -Eye Which muscle elevates the mandible? - ANSWER -Medial pterygoid 3 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. Which muscle originates from the alveolar process the maxilla, the alveolar process of the mandible, and the pterygomandibular raphe? - ANSWER -Buccinator Which part of the brain homeostasis? - ANSWER -Hypothalamus Which branch of the trigeminal nerve contains both sensory and motor components? - ANSWER - Mandibular V3 Which of the following are divisions or systems of the autonomic nervous system? - ANSWER - Sympathetic system, parasympathetic system Which cranial provides parasympathetic innervation to the cardiac muscles, thymus, and stomach? - ANSWER -X Which of the following is NOT innervated by the middle superior alveolar nerve? - ANSWER - Distobuccal root of tooth # 2 The muscles of facial expression innervated by which nerve? - ANSWER -VII Which vein receives blood flow from the superficial temporal vein and the facial vein and drains into the external jugular vein? - ANSWER -Retromandibular The articulation of the temporomandibular joint involves which two bones? - ANSWER -Temporal bone , mandibular condyles Which artery supplies the mandibular teeth and the surrounding tissues with blood? - ANSWER - Inferior alveolar Which major artery supplies the brain with blood and is palpated during emergency situations? - ANSWER -Common carotid Which artery is the source of the ophthalmic artery, has NO branches, and is located deep to the sternocleidomastoid muscle? - ANSWER -Internal carotid 4 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. The facial artery is a direct branch of which main artery? - ANSWER -External carotid Which of the following arteries supplies maxillary anterior teeth with blood? - ANSWER -Anterior superior alveolar The facial vein drains each region of the head and neck EXCEPT one. Which one is the EXCEPTION? - ANSWER -Orbital region Veins of teeth have alveolar branches and dental branches. Which branch type would drain the pulp tissue of teeth through the apical foramen? - ANSWER -Dental branches Which vein has NO valves, drains most of the head and neck region, and does NOT drain any of the dentition? - ANSWER -Internal jugular T/F Many veins in the head and neck region lack valves. Valveless veins of the head and neck contribute to the severe and rapid spread of dental infections. - ANSWER -Both statements are true. Each of the following is an afferent cranial nerve EXCEPT one. Which one is the EXCEPTION? A. Optic B. Vagus C. Olfactory D. Hypoglossal - ANSWER -D. Hypoglossal Which muscle, upon contraction, protrudes the tongue? - ANSWER -Genioglossus Each of the following is a suprahyoid muscle EXCEPT one. Which one is the EXCEPTION? A. Mylohyoid 5 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. B. Geniohyoid C. Stylohyoid D. Sternohyoid - ANSWER -D. Sternohyoid Cervical lymph nodes run along which muscle? - ANSWER -Sternocleidomastoid For each numbered muscle, select the most closely linked facial expression from the list provided. 1. Mentalis 2. Risorius 3. Corrugator supercilii 4. Levator anguli oris 5. Buccinator a. frowning b. raising chin and protruding c. chewing d. stretching lips e. smiling - ANSWER -1. Mentalis- b. raising chin and protruding 2. Risorius- d. stretching lips 3. Corrugator supercilii- a. frowning 4. Levator anguli oris- e. smiling 6 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. 5. Buccinator c. chewing T/F The first branchial arch is also called the mandibular arch. The cartilage forming within the mandibular arch is known Reichert cartilage. - ANSWER -The first statement is true, and the second statement is false. Each of the following is a period of prenatal development EXCEPT one. Which one is the EXCEPTION? A. Fetal B. Ovulation C. Embryo D. Preimplantation - ANSWER -B. Ovulation Which cells responsible for producing dentin? - ANSWER -Odontoblasts Each of the following is a component of the tooth germ EXCEPT Which one is the EXCEPTION? A. Enamel organ B. Dental sac C. Dental lamina D. Dental papilla E. Dental follicle - ANSWER -C. Dental lamina Division of a cell into two daughter cells occurs during which phase of mitosis? - ANSWER - Telophase 7 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. The inner cells of the dental papilla will develop into which structure? - ANSWER -Pulp The earliest indication of a part or an organ during prenatal development is referred to as the - ANSWER -Inner enamel epithelium Which stage of tooth development occurs between the 11th and 12th weeks of prenatal development? - ANSWER -Bell Which of the following cells is/are DIRECTLY responsible for immunoglobulin production? - ANSWER -Plasma Incremental lines that stain brown in preparations of mature enamel are - ANSWER -lines of Retzius. Which period of prenatal development occurs during months 3 to 9? - ANSWER -Fetal From the following list, select the structures of the embryo that begin development in week 4 of prenatal development face neck palate tongue placenta - ANSWER -Face, Neck, Tongue Each cell facilitates the exfoliation of a primary tooth EXCEPT one. Which one is the EXCEPTION? A. Ameloblasts 8 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. B. Osteoclasts C. Odontoclast D. Cementoclast - ANSWER -A. Ameloblast The cervical loop is responsible for development of - ANSWER -roots Down syndrome is a developmental disturbance that occurs during which period of prenatal development? - ANSWER -Preimplantation T/F The incomplete developmental division of a tooth germ is called FUSION. Fusion place during initiation stage of tooth development. - ANSWER -Both statements are false. Which is the most common cell found in the lamina propria of the oral mucosa? - ANSWER - Fibroblast The cells responsible for the development of the periodontal ligament come from the - ANSWER - Dental sac The cusp of Carabelli is found on which permanent molars? - ANSWER -# 3 # 14 T/F Eight bones compose the neurocranium, surrounding the brain. Fifteen bones compose the viscerocranium, or the bones of the face. - ANSWER -The first statement is true, and the second statement false The sphenoid bone is composed of the - ANSWER -temporal fossa , superior orbital fissure of the orbit, base of skull anterior to occipital Anatomically, the inferior alveolar artery supplies which structure? - ANSWER -Mandibular teeth The functions of the lymphatic system include all EXCEPT one. Which one is the EXCEPTION? 9 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. A. Filter fluids B. Fight infection C. Produce lymphocytes D. Produce thrombocytes E. Return plasma to venous bloodstream - ANSWER -D. Produce thrombocytes T/F The abducens (VI), trochlear (IV), and oculomotor (II) nerves all provide innervation to the the eye. These nerves provide sensory innervation. - ANSWER -The first statement is true, and the second is false. The temporomandibular joint (TMJ) Is capable of which two types of movement? - ANSWER - Rotation, gliding Which arteries are the terminal branches of the external carotid artery? - ANSWER -Maxillary, superficial, temporal How many teeth are present in an individual with a full deciduous dentition? - ANSWER -20 Which is NOT characteristic feature of the primary dentition? - ANSWER -Thin dentin Which teeth have wider crowns mesiodistally than faciolingually? - ANSWER -#7 and # 10 Each is an important function of the cementoenamel junction (CEJ) EXCEPT one. Which one is the EXCEPTION? A. Prevention of caries B. Self- cleansing properties C. Food deflection resulting in gingival inflammation 10 | P a g e Created by Grace Amelia © 2025, All Rights Reserved. D. Health and maintenance of periodontal tissue in interproximal spaces - ANSWER -A. Prevention of caries T/F The clinical crown-to-root ratio is always the same. However, the anatomic crown-to-root ratio may change. - ANSWER -Both statements are false . T/F There is relatively constant mesial movement of the molars to compensate for proximal abrasion. Relatively consistent occlusal forces result bone remodeling. - ANSWER -Both statements are correct and related. T/F Enamel is formed by ameloblasts, which derived from the ectoderm. The ectoderm also signals the mesoderm to start the development of dentin and pulp. - ANSWER -Both statements are true. Cellular metabolism occurs in the - ANSWER -mitochondria. T/F During facial development, the two structures forming The major facial s