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Hyperdontia: Exploring the developmental abnormality

100%
Arandi N. Z.
Journal of Pre-Clinical and Clinical Research
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2020
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tom 14
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nr 4
2

Dental abnormalities in the red fox Vulpes vulpes from Poland

100%
Szuma E.
Acta Theriologica
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1999
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tom 44
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nr 4
The sample of 1453 specimens of the red fox Vulpes vulpes (Linnaeus, 1758) from Poland was analysed from the point of view of the presence and frequency of congenital dental abnormalities. Deviations from the steady dental pattern were found in 196 specimens (56 females, 100 males and 40 specimens of unknown sex). Together 230 cases of' anomalies were classified to eight different categories of dental abnormalities. The most frequent anomalies were: oligodonties (7.2%; leaving out those of M3 - 2.8%). The frequencies of the remaining categories were the following: deviations from the typical shape of the tooth - 2.5%, hypoplastic changes of the tooth enamel - 2.5%, presence of extra roots - 2.0%, polidonties - 2.0%, irregularities in the position of the teeth - 1.9%, partial split of the crown - 1.4%, partial eruption of the teeth - 0.7%. The frequency of the dental abnormalities was significantly higher (p < 0.05) in males (15.7%) than females (10.5%). Six out of eight categories of the dental abnormalities, ie: oligodonty, polidonty, partial split of the crown, partial eruption of the teeth, deviations from the typical shape of the tooth and irregularities in the position of the teeth, were insignificantly more frequent in males, Additional roots were found equally often among males as females, while enamel hypoplasias occurred insignificantly more frequently among females than among males. The examples of the dental anomalies observed in red fox indicated that in many cases they did not result from the influence of a single factor but they were the effect of a combined operation two or more factors of both genetic and environmental nature.
3
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Dental abnormalities in children with cleft lip with or without cleft palate

86%
Lasota A.
Journal of Pre-Clinical and Clinical Research
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2021
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tom 15
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nr 1
4

Cranial and dental abnormalities of the endangered red wolf Canis rufus

72%
Federoff N. E., Nowak R. M.
Acta Theriologica
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1998
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tom 43
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nr 3
Skulls of 3 captive-raised female endangered red wolves Cams rufus Audubon and Bachman, 1851 exhibited severe malocclusion of the jaws. Cranial and dental abnor­malities (including crowding of upper toothrows. and an extra tooth behind the lower ¡eft M;i in one of the three mandibles) were also evident. Ratios of alveolar length of maxillary toothrow to maximum width across the outer sides of crowns of P4 were significantly different (p = 0.008} compared to unaffected skulls. Significant differences were also evident when ratios of maximum width across inner edges of alveoli of P1 to alveolar length of maxillary toothrow and maximum width across outer sides of crowns of P4 were compared between the two groups. Although the three skulls all exhibited malocclusion, the abnormality expressed itself differently in relation to the effects to each skull. Captive inbreeding may increase the probability and frequency of expressing these anomalies, although inbreeding coefficients calculated for the wolves expressing malocclusion were not considered high (0.0313-0.0508J. A wiSd female red wolf specimen captured in 1921 in Arkansas also exhibited the maloc­clusion, although not as severely as in the captive females. This demonstrates that this trait was present in wild populations prior to, and not a result of, the captive breeding program.
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