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Best of Fivesfor Dentistry

Douglas Hammond

BDS (Wales) MFGDP (UK)


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iv BEST OF FIVES FOR DENTISTRY

© 2006 PASTEST LTD

Egerton Court

Parkgate Estate

Knutsford

Cheshire

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Telephone: 01565 752000

All rights reserved. No part of this publication may be reproduced, stored in a

retrieval system, or transmitted, in any form or by any means, electronic, mechanical,

photocopying, recording or otherwise without the prior permission of the copyright

owner.

First Published 2006

ISBN: 1905635 19 2

ISBN 13: 978 1905635 19 1

A catalogue record for this book is available from the British Library.

The information contained within this book was obtained by the author from reliable

sources. However, while every effort has been made to ensure its accuracy, no

responsibility for loss, damage or injury occasioned to any person acting or refraining

from action as a result of information contained herein can be accepted by the

publishers or author.

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PasTest has been established in the field of postgraduate medical education since

1972, providing revision books and intensive study courses for doctors preparing for

their professional examinations.

Books and courses are available for the following specialties:

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Text prepared by Carnegie Book Production, Lancaster

Printed and bound in the UK by MPG Books Ltd, Bodmin, Cornwall


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v

ContentsAbout the Author vii

Introduction ix

1 Oral Medicine 1

2 Oral Surgery 23

3 Dental Materials 45

4 Child Dental Health and Orthodontics 67

5 Oral Pathology 95

6 Periodontics 117

7 Pharmacology 145

8 Radiology 167

9 Restorative Dentistry 189

10 Human Disease 213

Index 235

CONTENTS


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vii

About the Author

ABOUT THE AUTHOR

Douglas Hammond BDS (Wales) MFGDP (UK)

Clinical Lecturer in Oral and Maxillofacial surgery, Royal London Hospital.

Douglas graduated from Cardiff Dental Hospital and completed various hospital and

practice jobs. He then began working as a part-time lecturer in Oral and

Maxillofacial Surgery at the Royal London Hospital in 2002, whilst embarking on a

medicine degree at University College London. He should graduate in June 2007.

From there he hopes to continue into specialist training in Oral and Maxillofacial

Surgery.


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ix

Introduction

INTRODUCTION

This book aims to cover most of the aspects required in finals for dentistry. It tries

to cover a broad section of subjects, most of which are the “examiner’s favourites”.

There is a mixture of questions with some requiring straightforward recognition and

others requiring the application of knowledge. All of the most basic subjects are

covered and some of the more complex subjects. Hopefully this will be a good

revision aid to those revising for finals.


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6Periodontics


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119

6.1 Which one of the following bacterial species is not associated with

adult periodontitis?

A Fusobacterium nucleatum

B Bacteroides forsythus

C Porphyromonas gingivalis

D Shigella sonnei

E Prevotella intermedia

6.2 When looking at the notes of a patient, you see annotation for a

Basic Periodontal Examination (BPE). What does a score of 3 mean

on this particular index?

A Gingival bleeding, no overhangs or calculus, pockets > 3.5 mm

B Pockets within colour-coded area, 4.5–6.5 mm

C Colour-coded area disappears, pockets > 5.5 mm

D Pockets within colour-coded area, 3.5–5.5 mm

E Colour-coded area disappears, pockets > 5.5 mm

6.3 Which one of the following statements regarding acute necrotising

ulcerative gingivitis (ANUG) is true?

A It is caused by Gram-positive anaerobic bacteria

B It is characterised by chronic onset

C It affects non-smokers more than smokers

D It is caused by acid fast bacilli

E It is characterised by interproximal necrosis

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120 BEST OF FIVES FOR DENTISTRY

6.1 D

All of the bacteria in the list are responsible for adult periodontitis except S. sonnei,

which is responsible for acute diarrhoea.

6.2 D

The WHO probe is used for carrying out BPE. The index is shown below.

Score Disease

0 No disease

1 Gingival bleeding, no overhangs or calculus, pockets

< 3.5 mm

2 No pockets > 3.5 mm, no supragingival calculus or

subgingival overhangs present

3 Pockets within the colour-coded area, 3.5–5.5 mm

4 Colour-coded area disappears, pockets > 5.5 mm

6.3 E

ANUG is caused by Gram-negative aerobic bacteria, usually in the mandible, has a

very distinctive smell (fetor oris) and is more common in smokers and those with

poor oral hygiene.


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6.4 E

ANUG is a very painful condition. The most efficacious mouthwash is hydrogen

peroxide, and the bacterial component is treated with metronidazole. Amoxicillin

and erythromycin would be ineffective in treatment of this condition.

6.5 D

Tooth mobility is graded as shown in the table below.

Grade Description

1 Movement of the crown of a tooth in the horizontal plane is 0.2–1 mm

2 Movement of the crown of a tooth in the horizontal plane is greater than

1 mm

3 Movement of the crown of a tooth in the vertical plane

6.6 B

None of the others are relevant to periodontal disease.


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123

6.7 Which one of the following is associated with abnormal collagen

formation leading to periodontal disease?

A Type 1 diabetes mellitus

B Papillon–Lefèvre syndrome

C Hypophosphatasia

D Type 2 diabetes mellitus

E Hyperphosphatasia

6.8 What is the name of the probe shown in the figure?

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PERIODONTICS

A Briault’s

B Community Periodontal Index of Treatment Needs (CPITN)

C World Health Organization (WHO)

D Williams’

E Florida

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6.7 C

Hypophosphatasia, as well as Ehlers–Danlos syndrome are associated with

abnormal collagen formation and periodontal disease. Papillon–Lefèvre syndrome is

associated with abnormal neutrophil function, which leads to periodontal disease.

6.8 D

The probe shown is the Williams’ probe, which has 1 mm increments for accuratemeasurement of the pocket depth.


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125

6.9 In juvenile periodontitis, which bacterium is the recognised

aetiological agent?

A Porphyromonas gingivalis

B Prevotella intermedia

C Actinobacillus actinomycetemcomitans

D Borrelia burgdorferi

E Fusobacterium intermedium

6.10 Which teeth are most commonly affected in juvenile periodontitis?

A Incisors and first permanent molars

B Incisors and canines

C Canines and premolars

D Premolars and first permanent molars

E Canines and first permanent molars

6.11 For which teeth/surfaces would you use a Gracey no 1 or no 2

curette when scaling?

A All teeth

B All surfaces of anterior teeth

C Mesial surfaces of anterior teeth

D All surfaces of posterior teeth

E Mesial surfaces of posterior teeth

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6.9 C

A. actinomycetemcomitans is a capnophilic, non-motile rod that possesses a potent

leucotoxin, which causes lysis of polymorphonuclear leucocytes.

6.10 A

As these are the first teeth to erupt, they seem to be the teeth which are affected

most by juvenile periodontitis.

6.11 B

A Gracey no 1 or no 2 is ideally shaped to facilitate scaling of all surfaces of

anterior teeth.


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7043550 best of fives mcq

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