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- 1.1. The changes occurring in the periodontium of the anterior deciduous teeth of a 4-year-old boy were studied. The jaws and teeth were fixed in a formol acetic acid-alcohol solution, decalcified, dehydrated, and embedded in nitrocellulose in the usual manner.
- 2.2. As absorption of the deciduous anterior teeth progresses, the lingual alveolar bone undergoes extensive destruction, especially at the crestal region, lowering the latter and weakening the support; finally only spicules of bone remain.
- 3.3. At the beginning stages of shedding, the changes in the periodontal membrane are slight; however, they become intensified as the resorptive process continues. During the later stages secondary occlusal trauma is initiated, producing severe degenerative changes to the labial alveolar bone as well as to the periodontal membrane.
- 4.4. The microscopic appearance of the gingivae varied from normal to that of gingivitis. Calculus deposits were found in the anterior teeth.
- 5.5. Gingival clefts were noted in the interproximal areas of both the upper and lower jaws, and their development has been described.
- 6.6. The base of the epithelial attachment was found on the cementum in the anterior central incisors, whereas it was limited to the cementoenamel junction in the other anterior teeth.
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© 1959 Published by Elsevier Inc.