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Formation of the periodontal attachment in developing rabbit permanent incisors
Author(s) -
GREVSTAD HANS J.,
SELVIG KNUT A.
Publication year - 1983
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1983.tb00807.x
Subject(s) - cementum , periodontal fiber , in utero , cementogenesis , fetus , dentistry , incisor , medicine , maxillary central incisor , anatomy , pregnancy , biology , dentin , genetics
– Permanent incisors from fetal New Zealand white rabbits aged 25–30 days in utero and from 1–20 days postnatally were processed for light microscopy. Examination of longitudinal and cross‐sections revealed that cementum deposition and fiber attachment first occurred at 27 days in utero. A tooth‐to‐bone course of principal fibers confined to lateral aspects of the teeth was observed in 29‐day fetal incisors, whereas lingually the periodontal ligament remained undeveloped as late as 5 days postnatally. In 20‐day postnatal incisors, the development of the functional periodontal ligament was complete as evidenced by the fiber arrangement on all aspects of the root‐analogue tooth surface. This study shows that 25–26‐days fetal rabbit permanent incisors represent the end of the follicular phase, whereas 27‐day fetal to 20‐days postnatal teeth demonstrate distinct histologic characteristics of initial, incomplete and complete periodontal fiber attachment.