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Library of Congress Cataloging‐in‐Publication Data
Names: Biyani, Prateek, author.
Title: Single best answer questions for dentistry / Prateek Biyani.
Description: Hoboken, NJ : Wiley‐Blackwell, 2020. | Includes index.
Identifiers: LCCN 2020023348 (print) | LCCN 2020023349 (ebook) | ISBN 9781119702351 (paperback) | ISBN 9781119702344 (adobe pdf) | ISBN 9781119702375 (epub)
Subjects: MESH: Dentistry | Examination Questions
Classification: LCC RK57 (print) | LCC RK57 (ebook) | NLM WU 18.2 | DDC 617.60076–dc23
LC record available at https://lccn.loc.gov/2020023348 LC ebook record available at https://lccn.loc.gov/2020023349
Cover Design: Wiley
Cover Images: Dental Check‐up © Branimir76/Getty Images, Dentist medical tools on tray © baona/Getty Images
Preface
Practising questions is an important aspect of revision. This book aims to provide a useful source of revision for dental students and those sitting the MJDF/MFDS/ORE exams. It features questions with the corresponding answers on the next page. Knowledge in this book is accurate at the time of writing and at the level of that which would be required for the current examinations but, as would be expected, this content may be updated over the years.
Mr Prateek Biyani
BDS (Hons.), MFDS RCPS(Glasg.), Cert Med Ed
CHAPTER 1 Restorative Dentistry
1 What is the ideal freeway space (FWS) for complete dentures?1–3 mm2–4 mm3–5 mm4–6 mm5–7 mm
2 Which of the following describes a Kennedy Class II, in Kennedy’s classification for partially dentate patients?Patient with bilateral free‐end saddlesPatient with a unilateral free‐end saddlePatient with a unilateral bounded saddlePatient with an anterior bounded saddlePatient with a bilateral free‐end saddle and a missing UR2
3 What is the primary purpose of indirect retention in partial denture design?Prevent displacement of the denture in the axial directionAid insertion and removal of the denturePrevent lateral forces on teethPrevent tipping/rotation of the denture about a fulcrumAllow for effective cleaning
4 A sclerosed canal can be more easily navigated using which of the following irrigants?ChlorhexidineSodium hypochloriteEthylenediaminetetraacetic acid (EDTA)WaterCalcium hydroxide
5 Which graph best describes the changes in plaque pH in response to food?The Miller CurveThe Monson CurveThe Stephan CurveThe David CurveThe Spee Curve 1.bThis is the ideal FWS. However, often, if patients have had a different FWS for a long period of time, it may be necessary to adhere to their existing FWS. This is primarily to ensure good habituation.2.bKennedy Class II is a unilateral free‐end saddle. It may also have modifications. It is only Kennedy Class IV that does not have any modifications, as the most posterior saddle dictates the class and, thus, any modifications would in fact fall in to a different class.3.dIndirect retention helps prevent tipping of the denture about a fulcrum created by the denture components. It can be provided by other denture components including clasps, rests and connectors.4.cEDTA is a chelating agent used to soften the dentine and allow easy exploration of sclerosed canals. Sodium hypochlorite is the typical irrigant for root canal treatments. Calcium hydroxide is better used in a pulpless, temporary dressing.5.cThe curve demonstrating plaque pH changes associated with snacking is the Stephan Curve. This helps demonstrate how frequent snacking causes the pH to drop below the critical pH more frequently. As a result, an individual is more likely to develop caries.
6 Which of the following is the advancing edge of a carious lesion in enamel?Dark zoneBody of the lesionSurface zoneTranslucent zoneZone of sclerosis
7 Which of the following is a crucial feature of amalgam cavity design?110° cavo‐surface anglePresence of unsupported enamelLeaving caries at the amelo‐dentinal junction (ADJ)Placement of pinsUndercuts
8 Which of the following best describes retruded contact position (RCP)?The position of the mandible, relative to the maxilla, when the teeth are maximally intercuspatedThe first tooth contact when the condyle lies in its most favourable position in the glenoid fossaThe position of the mandible when the condyle lies in its most favourable position in the glenoid fossaThe movement of the mandible during protrusive movementsThe movement of the mandible during lateral movements
9 Which of the following is not a feature of the ideal occlusion?Mutual protectionMolar guidanceAnterior guidanceRCP = ICPForces down the long axis of the teeth
10 A patient presents with pain brought on by hot/cold stimuli that settles shortly after the stimulus is removed. What is the likely diagnosis?Reversible pulpitisAcute irreversible pulpitisChronic irreversible pulpitisPeriapical abscessCracked tooth syndrome 6.dThe translucent zone marks the advancing edge of a carious lesion in enamel. This is then followed by the dark zone, the body of the lesion and finally the surface zone.7.eUndercuts are necessary for amalgam restorations as they rely on mechanical retention. A 90° cavo‐surface angle is needed to reduce the risk of fracture, due to thin amalgam sections, and caries should always be cleared from the ADJ.8.bRCP is the position where first tooth contact occurs with the mandible in centric relation, i.e. where the mandibular condyle lies in the most superior (comfortable) position in the glenoid fossa.9.bAn ideal occlusion should feature canine guidance, and not molar guidance, for lateral excursions. This protects the posterior teeth.10.aThis
