Embryology of Eruption Workbook Answers PDF

EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Embryology of Eruption and Exfoliation Teamwork Improving Kindness Safety Student name:...

EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Embryology of Eruption and Exfoliation Teamwork Improving Kindness Safety Student name: 1  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY INTRODUCTION This workbook is to be used in conjunction with your lecture and powerpoint on the Embryology of Eruption and Exfoliation. Section 1: Question 1-2 Section 2: a) Question 3-4 b) Question 5-6 Section 3: a) Question 7 b) Question 8 Section 4: Question 9 Section 5: Glossary of Terms Learning resources and reading: Textbook Reading: Chapter 10 of: Nanci, A. & Ten Cate, A.R., 2018. Ten Cate's oral histology: development, structure, and function. 9th edition / Antonio Nanci, PhD (McGill), PhD Honoris cause (University of Messina). Articles: Eruptive tooth movement Craddock HL, Youngson CC. Eruptive tooth movement--the current state of knowledge. Br Dent J. 2004 Oct 9;197(7):385-91. doi: 10.1038/sj.bdj.4811712. PMID: 15475894. Critical review on the theories of tooth eruption: Marks, S.C., Jr. and Schroeder, H.E. (1996), Tooth eruption: Theories and facts. Anat. Rec., 245: 374-393. https://doi.org/10.1002/(SICI)1097- 0185(199606)245:23.0.CO;2-M A recent review of eruption theories: Rabea, A.A., 2018. Recent advances in understanding theories of eruption (evidence based review article). Future Dental Journal, 4(2), pp.189-196. https://doi.org/10.1016/j.fdj.2018.05.001 2  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Online: Atlas of tooth development and eruption – useful guide to eruption timeline: https://www.qmul.ac.uk/dentistry/atlas/ Digital laboratory oral histology, slides 31-33 http://www.uky.edu/~brmacp/oralhist/module3/lab/oh3main.htm Lecturer: Miss Lauren Stockham [email protected] 3  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 1: Link embryological knowledge to the eruption process of teeth: 1. Label the cells indicated by the arrow associated with the enamel organ in the advanced bell stage - these cells will play a role in eruption too: Stellate reticulum, stratum intermedium, ameloblasts, outer enamel epithelium 2. Using your knowledge of the ameloblast cell lifecycle, the role once amaleogenesis is complete of the ameloblast is to: a. Mineralise the secreted enamel matrix b. Reduce in size and from a protective layer with the remaining cells of the enamel organ c. Undergo apoptosis along with the disappearing stellate reticulum d. Use its Tome’s process to secrete enamel matrix e. Differentiate into cementoblasts to form the root 4  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 2a: Questions during the session: 3. The eruption process of teeth… a) Starts during the bell stage of tooth development b) Starts after birth for all the primary teeth c) Starts once the root formation of a tooth is complete d) Starts at the same time as the crown formation begins 4. The reduced enamel epithelium… a) Forms a protective layer over the tooth root during eruption b) Forms from ameloblasts during amelogenesis c) Surrounds the developing tooth crown during eruption d) Fuses with the oral epithelium to form the periodontal attachment with the tooth Section 2b: Questions post-session: 5. The three phases of eruption include: a) Primary eruption, permanent eruption and exfoliation b) Pre-eruptive, active eruptive and post-eruptive c) Crown formation, root formation and eruption d) Pre-eruptive, intraosseous and supraosseous 6. The dento-gingival junction is important: a) to protect the crown with the reduced enamel epithelium b) to seal the oral cavity off to the internal environment c) to enable eruption of the tooth d) to form the gingival sulcus with the tooth root Additional notes to support your learning: 5  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 3: Consolidating your knowledge and understanding 7. Drawing on your knowledge obtained during the oral embryology sessions, identify and describe the 4 stages of development happening in this diagram and label as many features as you can: Stages: Active eruption of primary incisor, root formation of primary incisor, advanced bell stage of permanent successor, dento-gingival junction formation Label features: permanent successor, oral epithlium, … 6  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 3b: Clinical application 8. Have a good look at the radiographic image below…is there anything that does not look normal in terms of the eruption pattern of the teeth present? Make some notes on your thoughts and we will discuss. 7  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 4: Additional learning 9. To investigate the theories of eruption further here are two useful articles that I recommend reading and taking some notes: 8  EASTMAN DENTAL HOSPITAL EDUCATION CENTRE DENTAL HYGIENE & DENTAL THERAPY Section 5: Glossary of Terms 9