TYLMAN, STANLEY D.: College of Dentistry, University of Illinois, Chicago, Ill. (July 27, 1939).

 

Tabulation of data of observations begun in October, 1923, and still in progress, on all crowns and bridges constructed in the Crown and Bridge Department at the University of Illinois, gave data indicating (a) excessive destruction of certain teeth by caries, necessitating placement of crowns; (b)loss of certain teeth, owing chiefly to caries, necessitating restoration with bridges ; and (c) that for men the maximum restorative-requirement age-period is 20-29, inclusive—for women, 30-39, inclusive.

(1)     Crowned teeth having vital pulps: 1075 teeth (378 men, 575 women). Upper centrals and laterals, and lower first and second bicuspids and first molars, were most frequently crowned. A large majority of the patients kept their mouths clean. The patients were almost equally divided between caries-suscep­tibles 8 and non-susceptibles-60 percent were in good health ; 39 percent in fair health ; 1 percent in poor health. For men, the highest percentage of reconstruc­tive work was done during ages 20-29 inclusive ; for women, 30-39 inclusive.

(2)     Crowned non-vital teeth: 1350 teeth (506 men, 707 women). Upper centrals and laterals, and lower cuspids, first bicuspids, and first molars, were most frequently crowned. Occlusion was normal in 86 percent of the mouths. A large majority of the patients kept their mouths clean. Approximately 70 percent of the patients were susceptible to caries-75 percent were in good health; 24 percent in fair health ; 1 percent in poor health. For men the largest percentage of work was done during ages 20-29 inclusive ; for women, the largest percentage of work was equally divided between age-periods 20-29 and 30-39, inclusive.

(3)     Fixed bridges: 853 bridges (391 men, 462 women). Upper cuspids and second molars were most frequently used as abutments. These teeth were restored the least number of times with bridges. Upper second bicuspids were next in order of usefulness as bridge abutments. Upper laterals, first molars and first bicuspids, respectively, were most frequently lost and restored. Lower second molars, second bicuspids, and first bicuspids, respectively, were most frequently used as bridge abutments. In the entire mouth lower first molars were most fre­quently lost and restored by bridge-work. Of the teeth used as bridge abutments, 1439 had vital pulps, 300 were pulpless. Occlusion was normal in 35 percent of the mouths; 80 percent of the patients habitually kept their mouths clean. Slightly more than 50 percent of the patients were susceptible to caries-75 percent were in good health; 24 percent in fair health; 1 percent in poor health. For men the highest percentage of restorative work was done during ages 30-39 inclusive ; next, 20-29 inclusive—for women, during ages 20-29 inclusive ; next 30-39 inclusive.

(4)     Bridges semi-fixed: 683 bridges (287 men, 355 women). Upper second bicuspids, cuspids, and second molars, were most frequently used, respectively, as bridge abutments. Upper laterals, first molars, and first bicuspids, in the order indicated, were most frequently restored. Lower second molars, and second bi­cuspids, were most frequently used as bridge abutments. Lower first molars were, by far, most frequently lost—and restored with bridges. Of 1291 teeth used for abutments, 1070 had vital pulps, 221 were non-vital. Occlusion was normal in 80 percent of the patients, 75 percent of whom kept their mouths clean ; 50 percent

Here and below, ” susceptibility ” and ” non-susceptibility ” refer to conditions of the patients before restorative work was begun.

were susceptible to caries-75 percent were in good health ; 15 percent in fair health; 10 percent in poor health. For men the highest percentage of restorative work was done during ages 20-29 inclusive; for women, during ages 30-39 inclusive.

Reference: J. Am. Den. Assoc., 14, 1379, 1927

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