ditions of the cementum so long called exostosis, which seems applicable only to affections of true bone. Phagedenic pericementitis has been adopted as the scientific name of the condition known as Riggs' disease; this has been pointed out as the one condition that obtains throughout the progress of the disease and seems eminently suitable and correct. The author desired to substitute lingual for palatal as applied to the upper teeth, but so many expressed dissent that the latter term is sustained. There has been so much change in respect to nomenclature, it was thought best to insert articles on anatomy and physiology, so that those parts of the subject should correspond with the nomenclature used in the subsequent pages of this book. Similar reasons apply to the writing of several other portions of the work. With few exceptions, all of the first and second parts have been written expressly for this work. The third part on Crown and Bridge work is necessarily largely a compilation. The introduction of this work is too recent, and the methods of construction too diversified, to make possible any definite system which should appear unquestionably better than all others. This work is classed as Operative Dentistry as it is all dependent upon the natural teeth for support, and may all be done at the operating chair, and almost all of it is much better done with the patient present. All Operative Dentistry is mechanical, and crown work is no more so than filling a cavity, applying a medicine or injecting an abscess. It was the opinion of a large majority of the Dental Faculties that it should be properly considered as belonging to Operative Dentistry, and in dental societies it has been by common consent considered as such. The limited time the author could devote to writing of this work would have been found entirely inadequate for the task, but for the clerical and literary assistance rendered by his professional friend and former pupil, Dana W. Fellows, M. D. The portions treating of the Anatomy and Physiology of the teeth and contiguous parts and deciduous and permanent dentition were written entirely by him, and much critical assistance rendered throughout the book. Prof. Frank Abbott, M. D., also gave the author valuable help by making careful and extended notes on the manuscript. Important suggestions were made also by Profs. S. H. Guilford, A.M., D.D.S.; E. T. Darby, M.D., D.D.S.; C. N. Pierce, D.D.S.; A. H. Fuller, M.D., D.D.S.; T. E. Weeks, D.D.S.; Edmund Noyes, D.D.S.; H. W. Morgan, M.D., D.D.S.; S. W. Dennis, M.D., D.D.S.; T. H. Chandler, D.M.D., and Wm. H. Atkinson, M.D. Thanks are due to the S. S. White Dental Manufacturing Co. for the use of so many of their electrotypes for the excellent illustrations appearing in these pages, also to the publishers of the "American System of Dentistry," and to Claudius Ash & Sons, of London, for like favors. Boston, December 15th, 1888. THOMAS FILLEBROWN. CONTENTS. PAGE 9 IO II 12 Dentine, 11; Enamel, 11; Cementum, 12; Pericementum, 12. The Deciduous and Permanent Dentitions, Eruption of the Teeth, 13; Periods of Dentition, 13; Classes of Teeth, 14; Anatomi- cal Divisions of a Tooth, 14; Description of the Permanent Teeth, 15; Teeth of Instruments for Pulp Canals, 33; Instruments for Cleaning Teeth, 34; Instruments for Filling, 36; Pluggers for Gold, 37; Clamps, 38; Burnishers, 42; Finishing Sensitive Pulp, 94; Exposed Pulp, 94; Irritation, 95; Congestion and Inflammation, 95; Devitalization of Pulp, 96; Removal of Pulp, 97; Extirpation of Pulp, 98 ; Nitrous Oxide, 143; Ether, 145; Conditions unfavorable to Anesthesia, 146; Chlo- roform, 146; Rapid Breathing, 147; Local Anesthesia, 147; Unfavorable Symp- Crown with Metal Post, without Band, 176; the Logan Crown, 177; the Parmly Brown Crown, 181; the Collar Crown, 182; the Bonwill Crown, 190; the How Crown, 193: Baldwin's Crown, 199; Low's Crown, 201; the Improved Richmond Crowns, 206; Meriam Crowns, 207; the Mattison Crown, 211; Dr. Kirk's Crown, 214; the Leech |