Glosario Periodoncia

THE AMERICAN ACADEMY OF PERIODONTOLOGY

Glossary of Periodontal Terms
4th Edition
Copyright 200 I b y
The American Academy of Periodontology
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Chicago, Illinois 60611-2690
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No part of this publication may be reproduced, stored in a retrieval system, or
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ISBN 0-9264699-3-9
The first two editions of this publication were published under the title Glossary of
Periodontic Terms as supplements to the Journal of Periodontology. First edition,
January 1977 (Volume 48); second edition, November 1986 (Volume 57). The third
edition was published under the title Glossary vfPeriodontal Terms in 1992.

ACKNOWLEDGMENTS
The fourth edition of the Glossary of Periodontal Terms represents four years of
intensive work by many members of the Academy who generously contributed
their time and knowledge to its development. This edition incorporates revised
definitions of periodontal terms that were introduced at the
in Periodontics, as well as at the

1996 World Workshop1999 International Workshop for a Classification

of Periodontal Diseases and Conditions. A review of the classification system from
the

1999 Workshop has been included as an Appendix to the Glossary.

Particular recognition is given to the members of the Subcommittee to Revise the
Glossary of Periodontic Terms (Drs. Robert E. Cohen, Chair; Angelo Mariotti;
Michael Rethman; and S. JeromeZackin) who developed the revised material.

Under the direction of Dr. Robert E . Cohen, the Committee on Research, Science
and Therapy (Drs. David L. Cochran, Chair; Timothy Blieden; Otis J. Bouwsma;
Robert E. Cohen; Petros Damoulis; Connie Drisko; James B. Fine; Gary
Greenstein; James E. Hinrichs; Martha J. Somerman; Vincent J. Iacono, Board
Liaison; and Robert J. Genco, Consultant), aswell as Drs. Sigmund Socransky
and Henry Greenwell, served as peer reviewers for this edition of the Glossary.

------i[A]IABERRANT: Varying or deviating from the usual or
normal course, form, or location.

ABFRACTION: Hypothetical tooth surface abrasion
in conjunction with occlusal forces; data supporting
this term as a discrete clinical entity are not yet
available (See Abrasion;Erosion.)

ABRASION: Wearing away of a substance or structure
through an abnormal mechanical process. Examples
include gingival and dental abrasions due to incorrect
brushing.

ABUTMENT: Tooth, root, or implant used to support
and/or anchor a fixed or removable prosthesis.
INTERMEDIA
TE A.: Abutment located between

other abutments.

ACANTHOLYSIS: Dissolution of the intercellularattachments within the prickle cell layer (stratum
spinosum) of stratified squamous epithelium.
Classically seen in pemphigus vulgaris during vesicle
and bulla formation.

ACANTHOSIS: Hyperplasia of the prickle cell layer
(stratum spinosum) of stratified squamous epithelium,
resulting in thickened rete ridges or widening of this
layer.

ABSCESS: Localized collection of purulent exudateACATALASIA (Acatalasemia): Deficiency in the

(pus) in a cavity formed by the disintegration of

blood and tissues of the enzyme catalase, sometimes

tissues.

resulting in oral ulceration and destruction of alveolar

ACUTE A.: An abscess of relative short duration,

bone.

typically producing pain and local inflammation.
APICAL A.: Inflammatory condition characterized by

formation ofpurulent exudate involving the dental
pulp or pulpal remnants and the tissues sun'ounding
the apex of a tooth.
CHRONIC A.:

I. Abscess of comparatively slow

development with little evidence of inflammation.
There may be an intermittent discharge of purulent
matter. 2. Long-standing collection of purulent
exudate. It may follow an acute abscess. See:
Abscess, Residual.
GINGIVAL A.: A...