132 



iMASS. EXPERIMENT STATION BULLETIN 241 



Sixty-one per cent of all white Carver school children had from one to four 

 unfilled carious permanent teeth, and 22 per cent had five or more such teeth. 

 Fifty-four per cent of all white children in Sout'hwick had from one to four 

 unfilled carious permanent teeth, while but 11 per cent had five or more. 



Of the Carver children of native stock, 61 per cent (the same as for all 

 children in that town) had from one to four permanent teeth with unfilled 

 cavities; of the corresponding group in Southwick, 49 per cent had from one 

 to four such permanent teeth. For the children having five or more per- 

 manent teeth with unfilled cavities, the difference between Carver and South- 

 wick is not so great among those of native stock as among all children, being 

 13 per cent for Carver and 10 per cent for Southwick. The very poor teeth 

 found among the Finnish children of Carver are chiefly responsible for the 

 larger number of children in Carver who have five or more permanent teeth 

 with unfilled cavities. 



The significant differences here are those found among the children of 

 native stock, where 41 per cent of the Southwick children have no permanent 

 teeth with unfilled cavities, against 26 per cent in Carver; and where 61 per 

 cent of Carver's children and 49 per cent of Southwick's have from one to four 

 permanent teeth with unfilled cavities. 



Table 21. Condition of the Four First Permanent, or Six-year Molars 

 of All White Children 



Number of children 



Condition of molars 



All unerupted 

 No fissures: number of 

 molars carious or 

 extracted 



1 



2 



3 



4 



No carious or extracted: 



number of molars 



with fissures 



1 

 2 

 3 

 4 

 One or more fissures: 



number of molars 

 carious or extracted 

 1 

 2 

 3 

 4 



Carveb 

 4 











1 



67 



1(a) 

 4(a) 

 2 

 14 



19 

 26 



27 

 3 



Southwick 



7 











1 



37 



1(b) 

 4(c) 

 3 

 65 



40 



44 



24 



6 



Total number of children 



168 



232 



(a) One child with one molar unerupted. 



(b) Three molars unerupted. 



(c) All with two molars unerupted. 



