Variation of Teeth in Different Deficiencies

1. Vitamin D Deficiency (Rickets)

• Enamel hypoplasia - pits, grooves, or deep fissures on the crown surface of primary and permanent teeth
• Enamel may be almost entirely absent in severe cases
• Deficient dentin formation (interglobular dentin)
• Delayed tooth eruption
• Mandibular osteopenia/osteoporosis, especially in edentulous regions
• Critical period: rickets occurring at 6-12 weeks of tooth development is a common cause of enamel hypoplasia

"Teeth may be deficient in enamel, a condition often caused by vitamin D deficiency (rickets)" - Langman's Medical Embryology

"Rickets occurring during the critical period of tooth development (6 to 12 weeks) is a common cause of enamel hypoplasia" - The Developing Human: Clinically Oriented Embryology

2. Vitamin C Deficiency (Scurvy)

• Gingival hyperplasia (spongy, swollen, friable gums that bleed easily)
• Gingival hemorrhage and petechiae/perifollicular hemorrhages in the oral cavity
• Loose teeth - due to breakdown of the periodontal ligament (collagen-dependent)
• Stomatitis
• Gingival tissues become a source of halitosis
• Softer teeth due to defective dentin matrix

"Scurvy is associated with perifollicular hemorrhages and petechiae in the mouth, gingival hyperplasia, and stomatitis. The teeth may become loose" - Cummings Otolaryngology

3. Vitamin A Deficiency

• Defects in dentin and enamel of developing teeth
• Dyskeratotic changes of oral mucous membranes
• Angular cheilitis
• Enamel hypoplasia in severe deficiency

"Vitamin A deficiency produces dyskeratotic changes of the skin and mucous membranes, angular cheilitis, and defects in the dentin and enamel of developing teeth" - Cummings Otolaryngology

4. Calcium Deficiency / Hypoparathyroidism / Malabsorption

• Enamel hypoplasia - crown defects from pits to deep fissures
• Defective dentin formation
• Delayed tooth eruption
• Mandibular osteopenia

"Disorders of calcium metabolism (malabsorption, vitamin D-resistant rickets, hypoparathyroidism) are causes of enamel hypoplasia" - Harrison's Principles of Internal Medicine 22E

5. Fluoride - Deficiency vs. Excess

"Adult fluorosis results in mottled and pitted defects in tooth enamel as well as brittle bone (skeletal fluorosis)" - Harrison's Internal Medicine 22E

"Mottled teeth: This is the state of regional chronic dental fluorosis which exhibits opalescent pattern on the enamel surface of permanent teeth during the period of tooth calcification" - Essentials of Forensic Medicine & Toxicology

6. Vitamin B2 (Riboflavin) Deficiency

• Angular cheilitis (cracking at the corners of the mouth)
• Burning pain of lips, mouth, and tongue
• No direct structural tooth defect, but oral mucosal involvement

7. Folate and Iron Deficiency

• Atrophic glossitis - atrophy of filiform papillae on the tongue (smooth, beefy-red tongue)
• Angular cheilitis
• Occasionally hyperkeratotic lesions of the oral mucosa

8. Vitamin B12 and Folate Deficiency

• Recurrent aphthous ulcers (mouth ulcers)
• Atrophic glossitis

9. Niacin (Vitamin B3) Deficiency - Pellagra

• Swollen tongue pressing against the dentition
• Oral mucosal involvement
• Stomatitis

10. Zinc Deficiency

• Taste changes (dysgeusia) - can secondarily alter food and fluid intake
• No direct structural change to teeth

11. Vitamin K Deficiency

• Oral hemorrhagic bullae - blood blisters in the mouth due to impaired coagulation

Summary Table

• Enamel defects (hypoplasia, discoloration) from deficiencies are permanent - they form only during the critical window of tooth development in childhood
• Vitamin D and Calcium deficiencies are the most common causes of enamel hypoplasia
• Vitamin C deficiency is the classic cause of loose teeth via periodontal ligament destruction
• Fluorosis (excess fluoride) is the classic cause of mottled/discolored enamel (not a deficiency - the opposite)