Histological Study on the Postnatal Development and Sequence of Eruption of the Mandibular Cheek-Teeth of Rabbits (&lt;i&gt;Oryctolagus cuniculus&lt;/i&gt;)

Navarro, João Adolfo Caldas; Sottovia-Filho, D.; Leite-Ribeiro, M. C.; Taga, Rumio

doi:10.1679/aohc1950.39.23

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…The results of this study confirmed the observation made previously by other investigators, i.e., that the physiological root resorption of the deciduous lower molars of the rabbit occurs at Days 3-5 postnatally (Listgarten and Kamin, 1969;Horowitz et al, 1973;Navarro et al, 1976). This characteristic suggests that newborn rabbits provide an excellent model for study of the cellular events before and during the initial phase of physiological root resorption of deciduous teeth.…”

Section: Discussionsupporting

confidence: 91%

“…The root resorption of deciduous teeth in rabbits begins at Day 2-5 postnatally, and the tooth is exfoliated within about 1 month, and all of the permanent teeth the continuously erupting (Horowitz et al, 1973;Listgarten and Kamin, 1969;Navarro et al, 1976). In view of the nature of rabbit deciduous dentition, it is considered that this animal might prove an adequate and ideal supply of material for a study of the cellular events at the initial phase of the physiological root resorption of the deciduous teeth.…”

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confidence: 99%

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Cellular events at the onset of physiological root resorption in rabbit deciduous teeth

Sahara

2001

Anat. Rec.

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For elucidation of how physiological root resorption of deciduous teeth is initiated, the cellular events that occur surrounding the root of rabbit deciduous teeth before and at the onset of physiological root resorption were observed by means of light and electron microscopy. In addition, the cytodifferentiation of odontoclasts during the initial phase of this root resorption was evaluated by histochemical staining of tartrate-resistant acid phosphatase (TRAP) activity as a marker odontoclasts and their precursors. The present investigation was focused on the physiological root resorption of the deciduous lower second molar of rabbits from Day 0 -5 postnatally. At birth, the deciduous molar had not erupted yet, and no TRAP-positive cell could be found surrounding the tissue adjacent to the root of the deciduous tooth. TRAP-positive mononuclear cells were initially detected in the coronal portion of the dental follicle of the permanent tooth at Day 1 postnatally. Ultrastructurally, these mononuclear cells had moderate numbers of mitochondria and short-strand rough endoplasmic reticulum, as well as scattered free ribosomes throughout their cytoplasm. TRAP-positive mononuclear cells then appeared in the cementoblast layer immediately adjacent to the surface of the deciduous roots. These mononuclear cells projected cytoplasmic extensions between the cementoblasts and made contact with the cementum. At that time, cell-cell contact was frequently observed between these mononuclear cells and cementoblasts. During 3-5 days postnatally, the number of TRAP-positive multinucleate odontoclasts on the root surface gradually increased. They had well-developed ruffled borders and made typical resorption lacunae on the root surface of the deciduous tooth. During this early postnatal period, neither inflammatory cells nor necrotic tissue could be observed surrounding the deciduous root. This study demonstrates that the dental follicle of the permanent tooth as well as the connective tissue adjacent to the deciduous root might play important role in siteand time-specific recruitment, development, and activation of odontoclasts before and at the onset of physiological root resorption. Anat Rec 264: [387][388][389][390][391][392][393][394][395][396] 2001.

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Section: Discussionsupporting

confidence: 91%

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confidence: 99%

Cellular events at the onset of physiological root resorption in rabbit deciduous teeth

Sahara

2001

Anat. Rec.

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“…[3] stated that as a countermeasure to ongoing tooth damage, different forms of dentine precipitate in the pulp chamber of continually growing teeth. According to [27], the mandibular premolars erupt twenty-three days after birth, the mandibular permanent molars erupt nine days later, and the mandibular deciduous molars erupt four days after birth. However, [28] claimed that they typically lose their deciduous teeth before or soon after birth and are born with their permanent teeth.…”

Section: Discussionmentioning

confidence: 99%

Prenatal and postnatal development of the New Zealand white rabbit (Oryctolagus cuniculus) teeth: An emphasis on histological and computed tomography aspects

Haddad,

Abdel-Megeed,

Abumnadour

2023

Preprint

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The study reveals that New Zealand white rabbit teeth do not exhibit histomorphogenesis. The teeth development was examined in 28 rabbits from prenatal ages (E19, E23, E25, and E28), neonates (E30), and postnatal age (one and fourteen days). Rabbit teeth first appeared at 19 days of prenatal life as an ectodermal epithelial thickening on each side of the mouth opening. At E23, tooth regular construction is framed from enamel, dentine, and pulp cavity. The peg incisor appearance is visible on the lingual surface of the upper major incisor. Teeth prenatal development went through successive stages like initiation, bud, cap, late bell, maturation, and crown stages. The teeth are composed of the enamel organ and dense mesenchymal tissue. Teeth develop consistently throughout life, having expanded enamel thickness, being diphyodont teeth, having two continuous dentitions, being deciduous and perpetual, with long crown teeth and an open root.

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“…Mrs. S. Meyer and Mrs.E.Salmon fortechnical and photographic assistance. eral reports in the literature deal with some aspects of these teeth [Grasse, 1955;Peyer, 1968: Mayer, 1969Listgarten and Kamin, 1969;Horowitz et al" 1973;Navarro et al, 1975Navarro et al, , 1976.…”

Section: Introductionmentioning

confidence: 99%

The cheek teeth of the rabbit: morphology, histology and development

Michaeli¹,

Hirschfeld²,

Mm³

1980

Cells Tissues Organs

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Histological Study on the Postnatal Development and Sequence of Eruption of the Mandibular Cheek-Teeth of Rabbits (<i>Oryctolagus cuniculus</i>)

Cited by 9 publications

References 11 publications

Cellular events at the onset of physiological root resorption in rabbit deciduous teeth

Cellular events at the onset of physiological root resorption in rabbit deciduous teeth

Prenatal and postnatal development of the New Zealand white rabbit (Oryctolagus cuniculus) teeth: An emphasis on histological and computed tomography aspects

The cheek teeth of the rabbit: morphology, histology and development

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