Nuggets para national dental board part i

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READ FIRST!!!! To the Children: So here are the notes we poured our blood, sweat, and tears into. Couple of things: 1) Disclaimer: If there is anything in these files that offends you or anyone else, we don’t apologize, well, because you got it for free 2) Disclaimer: We still don’t know if a lot of the questions on these files are right or not. You will soon find in your studies that some exactquestions have different answers from different test years, so say a prayer and guess if you get it on your test. So don’t come tell us if you have found any errors or mistakes because, a) we don’t care anymore, and b) just fix it, make the files better, and help someone else benefit from your criticism. 3) Contents: a. Entire 2004 dental decks, typed up, and searchable (Control F for those whohave been living in a cave) b. Every single question/answer from the “USC” CD will all the various test questions. All of these items will be highlighted in green – I believe they go up to 2002 c. Random remembered questions after 2002, but definitely not all – and most are from 2003 to 2005. All of these answers are listed in yellow highlights. d. A ton of explanations from both Kaplan and USMLEFirst Aid books on a lot of the tough topics and topics they constantly hit over and over again. e. A ton of sweet images, charts, graphs, etc. courtesy of Google images, inc. f. A bunch of comedic relief intermixed in the pneumonic devices that helped us on the test.

DENTAL ANATOMY AND OCCLUSION ***Look to the book for eruption sequence ***Make a chart w/ # of canals by tooth – start w/ 77 Q 9779a Q44 – confirm w/ correct eruption sequence, 85 – review Pullinger 80 Q90 – Bennett shift TOOTH COMPOSITION & DEVELOPMENT REVIEW  Basically everything is from Ectomesenchyme except for Enamel, which is from Ectoderm  A quick review of Odontogenesis  Initiation  Induction – interaction between ectomesenchyme and epithelium  6th week  Formation of dental lamina  Bud Stage  Proliferation –both dental lamina and underlying ectomesenchyme  8th week  Dental lamina into 10 buds per arch  Shape of tooth is evident  Enamel organ starts to form  Tooth buds of the Maxilla appear 1st!  Cap Stage  Proliferation and Differentiation  Morphodifferntiation – change into other shapes  Histodifferentiation – branch into different tissues  9-10th week  ***NOW tooth germ is complete Bell Stage  Differentiation of Odontoblasts  For the whom the BELL TOMES  Differentiation to its furthest extent resulting in 4 different cell types in the bell-shaped enamel organ (makes enamel and Hertwig‘s root sheath)  OEE – cuboidal  IEE – columnar (Think I looks like a column)  Stellate reticulum – network of star-shaped cells


 Stratum intermedium – flat to cuboidal Dentalpapilla (makes dentin and dental pulp) differentiate into 2 layers  Outer cells  Central cells  Dental sac (makes Cementum, PDL, and alveolar bone proper) increases in collagen fibers  11-12 weeks  Remember enamel organ makes Enamel  Appositional Stage  Cells that were differentiated into specific tissue-forming cells begin to deposit the specific dental tissues (i.e. enamel, dentin, cementumand pulp)  Maturation Stage  Mineralization begins at the DEJ and continues until total development accomplished, taking approximately 2 yrs to complete   Enamel  Ectodermal Origin  4 Layers of Enamel Organ  Outer enamel epithelium  Outer cellular layer  Inner enamel epithelium (IEE)  Innermost layer  Cells will become ameloblasts  Essential for the initiation of dentin formation *NOTE: In a developing tooth, the junction of the dental papilla and the IEE becomes the DEJ  Stratum Intermedium Think I is next to I  Lateral to inner enamel epithelium  Essential to enamel formation (nutrients for the ameloblasts of inner enamel epithelium) – during calcification  Stellate Reticulum  Central core and fills bulk of organ  Contains lots of intercellular fluid (mucous type...