. Medical diagnosis for the student and practitioner. s,being encountered frequently in badly nour-ished, non-syphilitic children. D * The normal periods are, in months: First dentition: two lower central incisors 6 to upper incisors 8 to 12. Four anterior molars and lower lateral incisors 12 to 1 6 to 24. Posterior molars 24 to 36. Permanent set {in years),first set 6; second set 12 to 15; third set 17 to 25; Incisors 7 to 8. Bicuspids 9 to10. Canines 12 to 14. It follows that at the end of the first year there are 6 teeth; at theend of the second 16, and that the fi
. Medical diagnosis for the student and practitioner. s,being encountered frequently in badly nour-ished, non-syphilitic children. D * The normal periods are, in months: First dentition: two lower central incisors 6 to upper incisors 8 to 12. Four anterior molars and lower lateral incisors 12 to 1 6 to 24. Posterior molars 24 to 36. Permanent set {in years),first set 6; second set 12 to 15; third set 17 to 25; Incisors 7 to 8. Bicuspids 9 to10. Canines 12 to 14. It follows that at the end of the first year there are 6 teeth; at theend of the second 16, and that the first dentition should be completed in two ancl one-half years. t The late Frederic Forchheimer taught that teething produces teeth and nothing more,and such statements, though exaggerated, have gone far to correct the tendency toascribe specific, serious ailments to this common and usually trivial condition. Oftenimportant. Foci ofinfection. True type. 4° MEDICAL DIAGNOSIS Caution Commonlymisinterpreted. Arched palate. Paininhibition. Lack of Fig. ii.—Hutchinsonian syphilis. A false diagnosis of syphilis is a very serious matter and every case shouldbe fully proven before any opinion is expressed to family members. One may base tentative treatment upon his own assumption and thetherapeutic test is still invaluable but extreme reticence is wise and necessary. Progressive Separation of the Teeth.—This is encountered in cases ofacromegaly associated with enlargement of theupper or lower jaw and constitutes an importantsign of this disease. Teeth grinding is a common symptom ofadenoids, reflex irritation or gastric disturbancein children and is rarely due to the commonlyaccepted cause, worms. THE JAWS.—The high-arched palate, dueusually to neglected chronic naso-pharyngealobstruction, and so often associated, with theneurotic temperament in the adult, is readilynoted, as is the massive lower, or less often,upper, jaw of an acromegaly. The prominentsqu
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