Page 214 - My FlipBook
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2J0 OPEUATlVE DENTISTRY
in too severe terms as a retrogression in dentistry, unskilled in prin-
ciple and unwarranted in practice.
Gutta-Percha as a Protecting Covering is not a success from the
fact of its great range of contraction and expansion under varying
thermal changes. When enclosed under a perfectly tight and un-
yielding filling, as all fillings should be, the change in bulk must
have a piston-like effect upon the contents of the dental tubuli result-
ing in continued irritation.
