Premium
Sequences and timing of dental eruption in Bolivian captive‐born squirrel monkeys ( Saimiri sciureus )
Author(s) -
Galliari C. A.,
Colillas O. J.
Publication year - 1985
Publication title -
american journal of primatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.988
H-Index - 81
eISSN - 1098-2345
pISSN - 0275-2565
DOI - 10.1002/ajp.1350080302
Subject(s) - tooth eruption , premolar , saimiri sciureus , deciduous teeth , deciduous , permanent teeth , biology , mandible (arthropod mouthpart) , maxilla , sexual difference , dentistry , medicine , anatomy , zoology , squirrel monkey , molar , ecology , psychology , psychoanalysis , genus
Squirrel monkeys, colony‐born from Bolivian parents, were studied to establish the sequences and timing of eruption for deciduous and permanent teeth. Infants were born with a naked gingiva, and in only one monkey was di 1 present at birth. The eruption of the lower deciduous teeth preceded their upper counterparts with the exception of di2, dc, and dpm2. No significant differences were found between the right and left quadrants of the mandible and maxilla. No significant sexual differences were found in the age of eruption. By the age of 14 weeks, all deciduous teeth had erupted. The sequence of eruption of the replacement teeth was different from that of milk teeth. The differences lie in the delayed eruption of canine teeth and in the inverted sequence, from the back to the front, of the premolar series. Significant sexual differences were found in total eruption (TE) for PM 3 and I 2 (P < 0.05) and highly significant differences (P < 0.01) in TE and initial eruption (IE) for C 1 , females being more precocious than males. The age at which monkeys completed dental eruption was highly variable, 103–119 weeks for males and 89–112 weeks for females. Differences were found when our results were compared with those of Long and Cooper [1968] for Colombian squirrel monkeys.