EXPORT CITATION

Chapter-26 Obtundents and Caustics

BOOK TITLE: Manual for Dental Hygienist

Author
1. Awasthi Maj Gen PN
ISBN
9789352702282
DOI
10.5005/jp/books/14199_27
Edition
1/e
Publishing Year
2018
Pages
3
Author Affiliations
1. Armed Forces Medical College (AFMC), Pune, Maharashtra, India; Indian Army Dental Corps, Dental Council of India; Manav Rachna Dental College, Faridabad, Haryana, India, Armed Forces Medical College (AFMC), Pune, Maharashtra, India; Indian Army Dental Corps; Dental Council of India; Manav Rachna Dental College, Faridabad, Haryana, India
Chapter keywords
Obtundent, caustic, phenol, nitric acid, arsenic trioxide, silver nitrate, alcohol, creosote, camphor, thymol, menthol, clove oil, dentalone, nerve fibril, lactic acid

Abstract

Obtundents are drugs used to dull or abolish the sensation or sensitiveness of dentin to allow its painless excavation. They paralyze the nerve fibril, e.g. local anodynes, and precipitate proteins and kill nerve tissue, e.g. caustics. Caustics are drugs that cause necrosis or tissue death and dissolution of tissues. Trichloroacetic acid is an antiseptic and rapid caustic that is less painful and more suitable for mucous membranes. Lactic acid is very useful caustic for oral use due to low toxicity. Metallic salts are caustic due to toxic metallic ions. Arsenic trioxide is a protoplasmic poison and causes necrosis of tissue cells, nerve fibrils, lymph and blood vessels.

© 2019 Jaypee Brothers Medical Publishers (P) LTD.   |   All Rights Reserved