The eruption pattern of deciduous teeth in miniature swine

Abstract

Since "miniature swine" are being used extensively as a research a dmal and since the literature concerning tooth eruption is not very precise, it has seemed advisable to observe and record tooth eruption in the "miniature swine" being used and to make comparisons with existing literature of domestic swine.A total of 55 pigs of the Pitman-Moore strain were observed weekly from birth until their dentition was complete at about 26 weeks. Lateral x-ray head plates and study models of both arches were made weekly for two members of the group. The study models and x-rays served for orientation and positive identification of teeth; and with the weekly observations constitute the data.Analysis of the data indicated there was no significant difference in the eruption time for any tooth due to the sex of the individual. A mean sequence of eruption for each arch was established for the group based on coefficients of concordance. There was no significant difference in sequence of eruption due to sex or litter.The eruption time and sequence noted for Pitman-Moore swine differed slightly from that recorded for domestic swine. The differences observed were slight and could be explained by the probably infrequent observations of domestic swine or small sample size.

The Course of the Mandibular Canal in the Growing Miniature Pig

“…Miniature pigs, in different breeding forms, are widely used in studies on the masticatory apparatus and are accepted as suitable for dental research (Weaver et al , 1962;Herring, 1976;Schumacher et al , 1987). Moreover, the postnatal growth pattern of the mandible (Robinson and Sarnat, 1955;BOhland et aL, 1989;Herring et aL, 1993) of this laboratory animal as well as its dentition (Weaver et al, 1966;1969;Schumacher et aL, 1989) can be considered as quite well known. Earlier studies on the MC of the pig are related to the vertical location of the canal (Robinson and Sarnat, 1955) and to the growth pattern of the canal's widths and heigths (Koppe et al, 1994).…”

Carga imediata sobre implantes osseointegráveis para ancoragem ortodôntica: estudo em minipigs

“…Esses animais foram denominados de miniporcos (minipigs) ou, dependendo das dimensões dos mesmos, suínos miniatura (miniature pigs). A partir do desenvolvimento dos minipigs, as principais desvantagens dos estudos em suínos foram eliminadas, como o rápido crescimento e ganho de peso, além do alto custo para manutenção dos animais (MARIANO, 2003), favorecendo o início do desenvolvimento de diversas pesquisas (MCKEAN et al, 1971;WEAVER et al, 1966WEAVER et al, ,1969. …”

“…O desenvolvimento embriológico do suíno tem sido reconhecido como muito similar ao encontrado em humanos, razão pela qual embriões de suínos têm sido utilizados para o estudo da embriologia humana. As semelhanças se estendem à anatomia (BUSTAD; MCCLELLAN, 1965;ENGLAND et al, 1954;HERRING, 1995;MARIANO, 2003;MCKEAN et al, 1971;PANEPINTO;PHILIPS, 1986;WEAVER et al, 1969;WEAVER et al, 1962), fisiopatologia (BUSTAD; MCCLELLAN, 1965;ENGLAND et al, 1954;WEAVER et al, 1969;WEAVER et al, 1962) Pesquisas com minipigs indexadas no P ubMed MCCLELLAN, 1965;ENGLAND et al, 1954;WEAVER et al, 1966;MCKEAN, 1965;WEAVER et al, 1962), as quais são muito menores quando a fisiologia do homem é comparada à do cão, rato, camundongo e outras espécies utilizadas em experimentação.…”

“…A seqüência e cronologia de erupção dos dentes em minipigs foram estudadas por WEAVER; JUMP; MCKEAN (1966MCKEAN ( ,1969 para Pitman-Moore Minipigs.…”

“…De maneira geral, concordando com outros estudos (BUCK; GEDRANGE et al, 2001;GIUNTA et al, 1995;HAAS, 1961;HERRING, 1995;MARIANO, 2003;MCKEAN et al, 1971;NOGUCHI et al, 1976;ÖDMAN et al, 1991;OLTRAMARI et al, 2007;THILANDER et al, 1992;URIST, 1965;WEAVER et al, 1966WEAVER et al, ,1969WEAVER et al, 1962), os suínos, em especial os minipigs, e em particular o Minipig BR-1, mostraram-se modelos experimentais adequados para estudos em Ortodontia.…”