Dental The occurrence of keratinization on the human gingiva is A Dependent upon the functional stimulation the attached gingival receives B A reflection of inflammation in the underlying gingival connective tissue C A variable factor directly related to age D Lacking in the gingival crevice 💡 Explanation The occurrence of keratinization on the human gingiva is ✓ Correct Answer: D. Lacking in the gingival crevice