- Email: [email protected]
Conducted by the Scientific Foundation and Research Commission of the National Dental Association
THE RESEARCH DEPARTMENT.
ip
H II
|f|
CONDUCTED BY THE
SCIENTIFIC FOUNDATION AND RESEARCH COMMISSION O F THE
NATIONAL DENTAL ASSOCIATION. A ll Com m unications for this Departm ent Should be A ddrest to the Chairman. W eston A . Price, M .S ., D. D. S., 10406 Kuclid Ave., Cleveland, Ohio.
D EN TAL CARIES. By Russell W . Bunting, D. D. Sc., and U. G. Rickert, B. S., M. A.
(Being the work done upon this subject in the laboratories of the University o f Michigan under the aus pices o f the Research Commission o f the National Dental Association during the year 1914-1915.)
N A PREVIOUS report* we stated the various factors w hich entered into the problem of dental caries and attem pt ed to give a general survey of the w hole field of research as applied to this subject. And in continuing our investigations dur ing the past year w e have confined our attention alm ost solely to one factor in the process of caries, as stated in our fo r m er report, namely the resistance of the tooth. It is then, our purpose in this re port to state the w ork which w e have done as correlated with that of others w ho are engaged in the same field, and set forth w hatever conclusions we may hold at the present time. In order that our form er statements may be at hand in this discussion we take the liberty of re peating the same.
I
♦Official Bulletin of the National Dental A sso ciation, Vol. 1, No. 4, page 16.
R E S IS T A N C E O F T H E T O O T H . That caries o f the teeth is largely dependent upon the character and quality o f the teeth nas in all ages found a wide acceptance. Many have claimed that from clinical data there could be no doubt but that the so-called “ soft” teeth were more liable to caries that those o f a harder and more perfect variety. The susceptibility o f such teeth was attributed to a deficiency in amount and organization o f their inorganic constituents. Several observers have made investigations in the attempt to gain some definite information in this regard. Among the results which have been obtained, is the work o f G. V. Black*, who in the compilation o f a large number o f analyses o f teeth came to the follow ing con clu sion s. “ No diminution o f density or percentage o f lime salts occurs in the teeth o f women during the process o f child-bearing because o f that fact. Any basis fo r accounting for caries in this or that case on account o f “ frail teeth", or ‘ teeth below the medium in structure’ , 'poorly calcified teeth,' etc., must disap p ear/’ This later statement he based upon the fact that the specific gravity and lime salt content o f carious teeth was equal to that o f immune teeth. *Dental Cosmos, Vol. 37, page 353.
247
ip
H II
|f|
CONDUCTED BY THE
SCIENTIFIC FOUNDATION AND RESEARCH COMMISSION O F THE
NATIONAL DENTAL ASSOCIATION. A ll Com m unications for this Departm ent Should be A ddrest to the Chairman. W eston A . Price, M .S ., D. D. S., 10406 Kuclid Ave., Cleveland, Ohio.
D EN TAL CARIES. By Russell W . Bunting, D. D. Sc., and U. G. Rickert, B. S., M. A.
(Being the work done upon this subject in the laboratories of the University o f Michigan under the aus pices o f the Research Commission o f the National Dental Association during the year 1914-1915.)
N A PREVIOUS report* we stated the various factors w hich entered into the problem of dental caries and attem pt ed to give a general survey of the w hole field of research as applied to this subject. And in continuing our investigations dur ing the past year w e have confined our attention alm ost solely to one factor in the process of caries, as stated in our fo r m er report, namely the resistance of the tooth. It is then, our purpose in this re port to state the w ork which w e have done as correlated with that of others w ho are engaged in the same field, and set forth w hatever conclusions we may hold at the present time. In order that our form er statements may be at hand in this discussion we take the liberty of re peating the same.
I
♦Official Bulletin of the National Dental A sso ciation, Vol. 1, No. 4, page 16.
R E S IS T A N C E O F T H E T O O T H . That caries o f the teeth is largely dependent upon the character and quality o f the teeth nas in all ages found a wide acceptance. Many have claimed that from clinical data there could be no doubt but that the so-called “ soft” teeth were more liable to caries that those o f a harder and more perfect variety. The susceptibility o f such teeth was attributed to a deficiency in amount and organization o f their inorganic constituents. Several observers have made investigations in the attempt to gain some definite information in this regard. Among the results which have been obtained, is the work o f G. V. Black*, who in the compilation o f a large number o f analyses o f teeth came to the follow ing con clu sion s. “ No diminution o f density or percentage o f lime salts occurs in the teeth o f women during the process o f child-bearing because o f that fact. Any basis fo r accounting for caries in this or that case on account o f “ frail teeth", or ‘ teeth below the medium in structure’ , 'poorly calcified teeth,' etc., must disap p ear/’ This later statement he based upon the fact that the specific gravity and lime salt content o f carious teeth was equal to that o f immune teeth. *Dental Cosmos, Vol. 37, page 353.
247