Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
STAGES OF ODONTOGENESIS IN THE FIELD VOLE (MICROTUS-AGRESTIS, RODENTIA) - A PILOT-STUDY
Autore:
WITTER K; MISEK I; PETERKA M; PETERKOVA R;
Indirizzi:
ACAD SCI CZECH REPUBL,INST ANIM PHYSIOL & GENET,LAB GENET & EMBRYOL,VEVERI 97 BRNO 60200 CZECH REPUBLIC ACAD SCI CZECH REPUBL,INST EXPT MED PRAGUE CZECH REPUBLIC
Titolo Testata:
ACTA VETERINARIA BRNO
fascicolo: 4, volume: 65, anno: 1996,
pagine: 285 - 296
SICI:
0001-7213(1996)65:4<285:SOOITF>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
ARVICOLIDAE;
Keywords:
TOOTH DEVELOPMENT; 3D COMPUTER-ASSISTED RECONSTRUCTION; ONTOGENY; RODENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
K. Witter et al., "STAGES OF ODONTOGENESIS IN THE FIELD VOLE (MICROTUS-AGRESTIS, RODENTIA) - A PILOT-STUDY", ACT VET B, 65(4), 1996, pp. 285-296

Abstract

The aim of this study was to obtain basic morphological data on prenatal development of this dentition and its timing using serial histological sections and computer-assisted three dimensional 3D reconstructions. Twenty nine embryos and fetuses were classified into nine Sterb's comparable stages (SCS) and their ontogenetic age was estimated within13th and 20th day of ontogenesis (DO). Dental lamina was formed on DO-13. During the next stage, dental cap arose for the first incisor andthe first molariform tooth. On DO-16, the dental caps deepened and their histodifferentiation was evident. Measuring of the thickness of the dental epithelium revealed transient rudimental tooth primordia in both the upper and lower jaw quadrant, apart from the functional teeth:one rudiment anterior to the incisor anlage and three rudiments in the the future diastema (margo interalveolaris). Later however, each of these vestiges disappeared. On DO-17, dental caps for the incisor and first molariform tooth transformed into bell-shaped enamel organs. A dental cap was formed for the second molariform tooth from the peg-shaped dental epithelium, which projected posteriorly from the enamel organ of the first molariform tooth into the mesenchyme. On DO-20, bell-shaped enamel organs for the incisor and first molariform tooth, as wellas the bell-shaped enamel organ for the second molariform tooth, werewell differentiated. In 3D computer-assisted representations, the enamel organs for the molariform teeth exhibited a typical plicident structure. An epithelial peg-shaped expansion grew out of the posterior end of the second molariform tooth primordium. This expansion was predestined to give rise to the third molariform tooth postnatally. Contraryto the second and third molariform tooth, which originated posteriorly from the subepithelial peg shaped protrusion of the dental epithelium, the incisor and first molariform tooth in the field vole developed on the labial side of the dental lamina arising directly from the oralepithelium. The free terminal margin of the dental lamina projected lingually from the base of the later tooth primordia.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 23:05:00