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Effect of primary molar extraction on gingival emergence of succedaneous tooth

Journal of Dental Research 45(4): 1174-1183
Effect of primary molar extraction on gingival emergence of succedaneous tooth
The factors which may accelerate or retard gingival emergence of permanent teeth were investigated. The data were obtained from serial dental roentgenograms, casts and extraction records for 20 North American white children. The average time of bicuspid eruption is neither hastened nor delayed significantly by extraction of primary molar predecessor (when other "factors" such as pathology, pulpotomy, etc. are not considered); eruption retardation was noted when pathology was associated with the extracted molar and acceleration when pathology was not present; when bicuspi successor eruption occurred within two yr. after molar extraction, significantly earlier eruption occurred on the extraction side; generally later bicuspid eruption on extraction side was observed in cased (usually with associated molar pathology) with 2 yr. from molar extraction to successor eruption; bicuspid eruption was not influenced greatly by space inadequacy; variables of age at primary molar extraction and interval between molar extraction and successor eruption show moderate negative correlation; and a correlation of r=+. 70 was obtained for variables of differences between bicuspid eruption times on extraction and non-extraction sides and primary molar extraction-bicuspid eruption interval.

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Accession: 024557169

PMID: 5224085

DOI: 10.1177/00220345660450042401

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