Dental surgery notes.

  • Dowsett, Ernest B. (Ernest Blair)
Date:
1912
Catalogue details

Licence: In copyright

Credit: Dental surgery notes. Source: Wellcome Collection.

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    3. Constant’s Theory—increased vascularity of membrane at growing base ; thus engorged vessels force up tooth by blood pressure. 4. Coleman’s Theory—“ Bone Currents ”—i.e. presence of a tooth causing bone to grow in its vicinity. 5. Contraction of Fibres of Dental Ligament—can only be an adjunct to some other force. 6. General Growth of Bone—carrying teeth to the surface. 7. Delabarre's Theory—analogous to a Guberna- culum ; the fibrous remains of the neck of of the enamel organ contracting and pulling tooth out of crypt. Dates of Eruption and Formation Roots Absorption Erupt. complete. begins. Central . . 7 months. 3 years. 4 J years. Lateral . -9 ,, 3 42 >> Canine . .18 ,, 5 6J „ 1st molar . .12 4 5i 2nd molar . .24 5 11 Erupt early in— a. Syphilitic children (some may erupt before birth). b. Tuberculous children. Erupt late in—- a. Rickety children. b. Unfavourable hygienic surroundings. c. Cretinism. Normal Signs of Approaching Dentition 1. Increased flow of saliva. 2. Tendency of child to bite. 3. Gums tense and shining. 4. Mouth hot.
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