Systemized Orthodontic Treatment Mechanics

www.allislam.net www.allislam.net Problem Systemized orthodontic treatment mechanics scanned by LIST team www.allislam.net Systemized orthodontic treatment mechanics Richard P McLaughlin San Diego, California, USA John C Bennett L o n d o n , UK Hugo J Trevisi Presidente Prudente, Brazil - . ■ M Mosby EDINBURGH LONDON NEW YORK PHILADELPHIA scanned by UST team ST LOUIS SYDNEY TORONTO 2001 www.allislam.net MOSBY An imprint of Harcourt Publishers Limited © Mosby International I-(d 2001 M is a registered trademark of I larcourt Publishers Limited The right of L)r Richard P McLaughlin, Dr John C Bennett and Dr 1 lugo I Trevisi to be identified as authors of this work has been asserted by them in accordance with the Copyright, Designs and Patents Act 1988 All rights reserved. No pail 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 either the prior permission of the publishers (Permissions Manager, Harcourt Health Sciences, Robert Stevenson House, 1-3 Baxter's Place, Leith Walk, Edinburgh EH1 3AF), or a licence permitting restricted copying in the Llniled Kingdom issued by the Copyright Licensing Agency, 90 Tottenham Court Road, London Wl I' OI.P. first published 2001 1SBN072343171X British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging in Publication Data A catalog record for this book is available from the Library of Congress The publisher's policy is lo use paper manufactured from sustainable forests Typeset by IMH(Cartrif), Loanhead, Scotland Printed in Spain scanned by UST team www.allislam.net PREFACE AND ACKNOWLEDGEMENTS - .aai i'n 1^ ii n Hiii ii ttmBamargemKsmamBBmuBammmmmBimmmmmmammmmmmmmmmmmmmmm Goal-directed orthddontic treatment is extremely important. If the goals of treatment goals are not kept in mind from the diagnosis and treatment-planning phase through lo the phase of retention, continuous errors can be made. Treatment then becomes inefficient and results are disappointing. However, if treatment goals are kept constantly in mind, results become much more consistent, and when minor compromises must occur, the reasons for these can be understood, and many of them can be avoided in the future. The goals of treatment for the authors are listed below. They hope the reader will keep these in mind when reading the text, to provide greater insight into their intent. It is hoped that in that way it will have more meaning. The treatment goals are: • • • • Condyles in a seated position - in centric relation Relaxed healthy musculature A 'six keys' (Mass I occlusion Ideal functional movements - a mutually protected occlusion • Periodontal health • Best possible aesthetics. This book was originally planned as a second edition of the first Bennett and McLaughlin text, entitled Orthodontic Treatment Mechanics and the Preadjusted Appliance, published in 1993. However, there have been so many technological changes and improvements over the past 8 years that an entirely next text became necessary, supplementing the general message of the first. A second Bennett and Mclaughlin text, entitled Orthodontic K4anagemenl of the Dentition with the Preadjusted Appliance, was published in 1997. This devoted a chapter to each tooth in the dentition, emphasizing clinical situations relating to each tooth. It evolved into a far more extensive project than initially intended, and required a substantial manuscript to cover the wide range of material. With this third textbook, the intention is to return to a concise format somew