File:Dental review; devoted to the advancement of dentistry. (1901) (14595405360).jpg

Identifier: dentalreviewdevo1519unse (find matches)
Title: Dental review; devoted to the advancement of dentistry.
Year: 1901 (1900s)
Authors:
Subjects: Dentistry
Publisher: Chicago, Dental review company 1887-(1918)
Contributing Library: Columbia University Libraries
Digitizing Sponsor: National Endowment for the Humanities (NEH)

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Fig. 4. ORIGINAL COMMUNICA TIONS. 19 for the practical purposes in beveling the enamel margins? It isreadily noted in microscopic section, and almost as easily noted inpractice by the proper use of hand instruments. For illustration, first we will take a simple occlussal cavity.If the decay has not sufficiently progressed to undermine the enamel,this may be accomplished by a single cut of an inverted cone bun
Text Appearing After Image:
Fig. 5. Then, by the use of a .sharp chisel, following the axial direction ofthe tooth, the enamel will readily split in the lines of least resistance.The cavity then, without further preparation, with the dentine asthe base would be trapezoidal in shape (Fig. 5 ), and unless the bor-ders were carried well toward the marginal ridges, it would be neces-sary to bevel off the ends of the rods to attain borders perpendicular 20 THE DENTAL REVIEW. to the base (Fig 6), and at the outer edge a further bevel for con-venience form. The latter marginal bevel I do not deem advisablewhere amalgam is to be used as the filling material. There is one characteristic of the enamel I wish but to touchupon before leaving the surface of the tooth under discussion. Thatis the irregularity so often found in the direction of the prisms. In-stead of being straight from inner to outer circumference of theenamel, their inner ends often reveal a twisted and curling appear-ance. (Fig. 7.)

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