CDCA OSCE MASTER SET Questions and Answers

**Disadvantage of a resin bonded denture (Maryland Bridge)? - Answer- Debonding Advantage of a Maryland Bridge? - Answer- Less tooth reduction Gutta percha is made out of? - Answer- Zinc oxide Drug that increase the concentration of lidocaine in the blood? - Answer- propanalol Best initial treatment for Maxillary oroantro fistula? - Answer- abx and irrigation Minimum occlusal reduction for PFM? - Answer- 1.5mm X-rays show many well demarcated PA lucencies Next step? - Answer- Pulp test them Purpose of SRP? - Answer- To reduce inflammation and pockets You extracted a tooth, 1 day later pt has a big blood clot. Next step? - Answer- Remove clot, apply pressure with gauze , evaluate Drug taken for arthritis? - Answer- Naproxene **Advantage of under contoured temps? - Answer- Improves health of gingival tissues Porcelain fractures because 3 reasons: - Answer- -It was a long span resulting in flexing of metal -unsupported porcelain -not enough occlusal reduction Minimum thickness for porcelain? - Answer- 2mm **Pt has difficulty swallowing with C/C b/c? - Answer- there is insufficient interocclusal space You insert C/C. 1 side contacts in CR, the other doesn't b/c? - Answer- Dimensional changes during processing **[Picture] Arrow to the reciprocal clasp in above RPD, what's purpose - Answer- To counterbalance force of retentive arm/clasp **Blunted roots of anterior teeth are due to? - Answer- Excessive orthodontic forces When doing an implant, what's the best choice? - Answer- Endosseous Best treatment plant to replace one tooth? - Answer- Implant Advantage of implant? - Answer- Avoid the need to cut healthy teeth RPD better than FPD for what reason? - Answer- More hygienic X-rays cannot determine? - Answer- F/L width of the alveolar bone V notch is cut into plaster cast to be able to? - Answer- Remove and replace model more accurately What isn't an indication of an MI? - Answer- Pounding heart beat If patient has history of angina, do what? - Answer- Have pt take nitroglycerin Ideal occlusal reduction for porcelain on functional cusp? - Answer- 2mm **Best way to close an oro-antral fistula? - Answer- Surgery **When it's hard to match shade of adjacent teeth? - Answer- Select shade lower in color saturation and less gray The last 1/3 of the retentive arm of the clasp is located where? - Answer- Apical to the height of contour Purpose of the die spacer? - Answer- To allow room for the cement If you are pulp testing and apply cold, tooth responds and goes in 3s. Dx? - Answer- Reversible pulpitis If you are pulp testing and apply cold, tooth responds and goes immediately. Dx? - Answer- Healthy tooth In an emergency, the accepted dose of injectable epi is? - Answer- 0.2cc of 1:1000 Hydrochlorothiazide is a? - Answer- Diuretic **Perio packs should be removed after surgery? - Answer- In one week Generally, prognosis for a diabetic patient having a lot of dental treatment is? - Answer- Poor Calcium channel blockers may cause? - Answer- Cause gingival hyperplasia Ideal undercut for cast clasp retentive arm is? - Answer- 0.01" Ideal undercut for wrought wire retentive arm is? - Answer- 0.03" Vertical cleft of bone is? - Answer- Dehiscence Best method to clean FPD? - Answer- Proxy brush Indexing base of the cast - advantage? - Answer- Allows accurate reattachment of the cast in proper articulator mounting Patient with a joint replacement doesn't have to pre-med if it's been how long? - Answer- 1yr (6mo now?) C/C pt that smokes. Evaluate what? - Answer- DMD should look for stomatitis nicotina Bacteria associated with ANUG? - Answer- Actinobacccilus Spirochaetes Most difficult 3rd molar impaction? - Answer- Distoangular If a nervous pt hyperventilates, do what? - Answer- Have them breathe into a paper bag Ideal implant for #10? - Answer- Endosseous Wax up for RPD framework is made on? - Answer- Refractory investment cast The least # of mandibular implants that could provide retention, stability for over denture is? - Answer- 2 Advantage of A/P strap vs full palatial coverage? - Answer- Less interference with taste and speech Horseshoe RPD is contraindicated b/c? - Answer- It lacks strength and rigidity Indication for altered cast technique? - Answer- When saddles rock under occlusal loading Medical condition aggravated by overweight people? - Answer- HTN Porcelain jacket crown margin should have? - Answer- A shoulder or butt joint Linear blue structure on ventral surface of the tongue on 70yo patient? - Answer- Lingual varicosity **Aspirin- main side effect? - Answer- Increased bleeding Phlebitis is? - Answer- Inflammation of wall of vein How many mg of nitro do you give to pt with angina? - Answer- 0.4mg Normal width of keratinized gingiva tissue on the buccal surface of the mandible is? - Answer- 3-4mm Surgical flap for perio is done for? - Answer- Access for instrumentation **Type of healing for surgical flap? - Answer- Long junctional epithelium Most important feature in design of P/ as far as major connector is? - Answer- To maintain rigidity Check sterilizer with? - Answer- Biological indicators **When HIV Elisa test is (-), it means? - Answer- No exposure to HIV & no antibodies for HIV are present Minimum crown/root ratio for abutment? - Answer- 1:1 Most important reason for ortho on the pt? - Answer- To move or reposition/distalize #11 The canine has a dish brown color it is? - Answer- The chroma of the tooth Complication of implant on #7? - Answer- Penetration of the nasal cavity In centric occlusion, the DB cusp of #30 occludes? - Answer- Central fossa of #3 In centric occlusion, the DB cusps of mandibular molars occludes? - Answer- In the central fossa of max molars In centric occlusion, the ML cusps of maxillary molars occludes? - Answer- I'm the central fossa of mandibular molars Most important consideration regarding implants in #7 & #10 is? - Answer- Spacing between roots Erythematous gingival tissue (red around gingiva) is caused by? - Answer- Anaerobes/anaerobic bacteria Purpose of max anterior denture teeth if not seen? - Answer- Speech and lip support **Pt says she faints at the sight of the needle. Do what? - Answer- Place in trendelenburg position Before taking shade, do what? - Answer- Polish teeth Give what medication for moderate pain? - Answer- Acetaminophen For final impression for C/C use? - Answer- Rubber polysulfide Replacing restoration in defective tooth with 3/4 or it being amalgam, tx of choice is? - Answer- PFM [radiograph] Looking at x-rays past-ortho, the tooth with the worst crown:root ratio was - Answer- #9 **When would you say the patient is having severe perio problems? - Answer- When the pockets continue to grow in depth #1 cause of cement failure is? - Answer- Improper mixing **The important feature of cement is? - Answer- Its resistance to solubility and strength against disintegration **Major concern associated with phlebitis? - Answer- Pulmonary emboli Drugs that cause gingival hyperplasia? - Answer- Nifedipine (brand: Adalat), dilantin Based on x-rays, what's the pocket depth of a certain tooth? - Answer- x-rays cant determine that Patient complains of spacing after SRP; this is due to? - Answer- reduction of gingival edema **Patient has a shunt in Lt arm for renal dialysis. What is major consideration? - Answer- don't take BP on left arm Best time for occlusal adjustment for patient needing RPD? - Answer- after dx and tx plan have been completed Purpose of occlusal rest? - Answer- resist forces and provide support Polycarbox cement causes? - Answer- little Pulpal inflammation GI cement - major advantage? - Answer- non irritating to the pulp Type III gold is best suited for? - Answer- Full crowns Advantage of all ceramic crowns vs PFM? - Answer- Esthetics The excepted minimal biological width is? - Answer- 2mm Hemostatic cord function? - Answer- To displace tissue laterally Purpose of the facebow? - Answer- to transfer the spatial relationship of the Maxilla to articular hinge axis Ditching a die does what? - Answer- exposes margins of the prep Wax pattern should be sprued to? - Answer- crown in area of the biggest bulk White, black, and gray - common characteristic? - Answer- Have no hues Hue is? - Answer- attribute of color by which it's perceived Value - major importance? Definition? - Answer- -is most significant dimension of ceramics -denotes the amount of black or white Chroma is? - Answer- is the amount or saturation of hue Red vs pink - chroma? - Answer- red has a chroma than pink Red vs pink - hue? - Answer- red is = to pink in hue Anterior teeth in C/ should be located to do what? - Answer- passively touch the wet/dry line on the lower lip Centric Relation is? - Answer- is a reproducible position Buccinator is important for what with C/C? - Answer- retention and stability of c/c Gross interferences in an immediate C/C should be adjusted when? - Answer- ASAP Overhang of amalgam crown causes what? - Answer- causes plaque accumulation & it's hard to remove #9 PFM was recently placed and now it's mobile and the gums are red. Reasons? - Answer- tooth may be in hyper occlusion **If the root is 16 mm long, what's the max amount of post length? - Answer- 11mm What's not part of perio dx? - Answer- bacteria survey and make up What should be done after a reline? - Answer- chk & decrease the vertical dimension Anti HTN drugs can effect retention of C/C because? - Answer- b/c it causes zero atomistic Don't use porcelain teeth on C/natural because? - Answer- b/c of wear Immediate c/c doesn't fit. Do what? - Answer-