Principles and practice of operative dentistry . Dentinpapillae Invagination of enamel-organFig. 110.—Vertical section through lower jaw of embryo field mouse. Primary epithelial cord Dentin papillEe. Bud to form thesecondary epi-thelial cord Enamel-organ Sac or wallof follicle Pie. 111.—Evolution of dental follicle at about the ninth week, showing invagination of enamel-organ. X 70. Sac wall Odontoblasts

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920