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Chapter-13 Development and Growth of Teeth

BOOK TITLE: Manual for Dental Hygienist

Author
1. Awasthi Maj Gen PN
ISBN
9789352702282
DOI
10.5005/jp/books/14199_14
Edition
1/e
Publishing Year
2018
Pages
7
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
Tooth germ, tooth development, tooth growth, dental lamina, dental sac, inner dental epithelium, vestibular lamina, stratum intermedium, dental papilla, stellate reticulum, outer dental epithelium, tooth bud, enamel organ

Abstract

The chapter talks about the development and growth of teeth and the stages involved in tooth development. The tooth germ is formed by an accumulation of cells that eventually forms a tooth. These cells originate from the ectoderm of the first pharyngeal arch and the ectomesenchyme of the neural crest. Tooth germ is composed by three components, namely enamel organ, the dental papilla and the dental sac or follicle. The dental sac or follicle forms three important cell lineages, namely cementoblasts, osteoblasts, and fibroblasts. The first sign of human tooth development is seen during the sixth week of embryonic life (11 mm embryo). At this stage, the oral epithelium consists of basal layer of high cells and surface layer of flattened cells. The chapter describes about dental lamina, dental sac, inner dental epithelium, vestibular lamina, stratum intermedium, dental papilla, stellate reticulum, outer dental epithelium, and tooth buds. Tooth development occurs into stages like the initiation stage, the bud stage, the cap stage, the bell stage, and finally maturation.

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