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1 Columbia University, School of Dental and Oral Surgery of the Faculty of Medicine, New York, N. Y.
The changes in the mandibular joint and periodontium of vitamin B complex deficient rats were:
1. Diminution and cessation of chondrogenesis and osteogenesis.
2. Atrophy of connective tissues.
3. Serous atrophy of bone marrow.
4. Resorption of cementum and dentin.
Refeeding of stock diet resulted in:
1. Rapid resumption of chondrogenesis and osteogenesis.
2. Remodeling of bone.
3. Hyperplasia of fibrous connective tissue.
4. Repair of cementum and dentin by a cementum or bonelike substance.
Submitted on November 20, 1950
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