Dose-response effects of colchicine and vinblastine on unimpeded eruption rates of the rat mandibular incisor

Chiba, M.; Takizawa, K.; Ohshima, S.

doi:10.1016/0003-9969(80)90086-2

Cited by 20 publications

(2 citation statements)

References 27 publications

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“…There are several established methods for measuring the eruption rate of the rat incisor; some involve the taking of measurements over a period of several days (Tsuruta et al 1974), or even weeks (Burn-Murdoch 1995, Risnes et al 1995; another way is to use non-contacting displacement detectors over a period of hours (Chiba et al 1995, Ohyama andYamaguchi 1999). For the taking of measurements over a long time period, the most commonly used method is the optical microscope with a graticule in the eyepiece which produces a direct measurement; other methods include the use of calipers connected to a digital voltmeter , Pitaru et al 1976, Weinreb et al 1985, Michaeli et al 1985, Steigman et al 1988, Brin et al 1990, radiographs (Ness 1954, 1956, 1965, Adams and Main 1962, Main and Adams 1966, Chiba et al 1968, Lavelle 1968, 1969 and photographs (Chiba et al 1973, 1980, Tsuruta et al 1974, Robins and Spicer 1981, Chiba and Ohshima 1985. However, none of the currently used methods is entirely satisfactory.…”

Section: Introductionmentioning

confidence: 99%

A comparison between a conventional optical method and image-analysis for measuring the unimpeded eruption rate of the rat mandibular incisor

Lee

Law

King

et al. 2002

Archives of Oral Biology

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The impeded/unimpeded eruption rates of the rat incisor have been much studied. The most commonly used optical microscopic method, which has inherent weaknesses, was compared here with an image-analysis method to measure the eruption rate of the mandibular incisor. The study also evaluated the incisal edge as a reference point for the measurement of the unimpeded eruption rate, and the frequency of shortening the mandibular incisor. The image-analysis method was found to be a simple and reliable technique that could replace the optical method. There was no significant difference between the data from the two methods; their kappa coefficients were similar at the 0.99 level. It was concluded that shortening the incisor in the measurement of the unimpeded eruption rate should be done at least every 48 h, and that the incisal edge of the shortened incisor can be used as the reference point for that measurement.

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Section: Introductionmentioning

confidence: 99%

A comparison between a conventional optical method and image-analysis for measuring the unimpeded eruption rate of the rat mandibular incisor

Lee

Law

King

et al. 2002

Archives of Oral Biology

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“…Smith and Warshawsky [12] found that ameloblasts and odontoblasts moved at rates of 651 and 631 µm/day, respectively, in the rat lower incisors. In the present study, the Weinmann et al [22][23][24][25][26][27] about 400…”

Section: ⅳ Discussionmentioning

confidence: 58%

Estimated Time of Biomineralization in Developing Rat Incisors

Park¹,

Min²,

Song³

et al. 2017

THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY

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The aim of this study was to estimate time of biomineralization in developmental stages of rat lower incisors. Eruption length was measured. Four stages of incisor development were identified on histologic and microscopic computerized tomography (micro-CT) sections: (1) preodontoblast, (2) dentin matrix secretion, (3) enamel matrix secretion, and (4) enamel calcification. The overall eruption rate of the rat lower incisor was 600 ± 70 µm/day (mean ± SD; n = 12). The length of the enamel secretion was 4.59 ± 0.75 mm in histologic section, was 3.64 ± 0.63 mm in radiographic section, which converts to 180.4 ± 30.0 hours, 145 ± 25 hours respectively (n = 24). These findings suggested that the four biomineralizing developmental stages of the rat incisor took only several days. The significance of this animal study was to provide understanding for the rapid biomineralization process of developing rat tooth germ by analysis of tooth forming period.

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Three-dimensional organization of fibroblasts and collagen fibrils in rat tail tendon

Squier

Bausch

1984

Cell Tissue Res.

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The orderly arrangement of fibroblasts and collagen in tendons and ligaments suggests that these cells may have precise relationships with one another and with the collagen fibrils. The spatial organization of rat tail tendon was therefore examined using scanning and transmission electron microscopy and by reconstructing a 35-microns long segment of tendon from serial transmission electron micrographs. Fibroblasts were regularly arranged in columns and showed more intimate association in the longitudinal than in the transverse plane. Thin cytoplasmic sheets extended up to 3 microns transversely, frequently forming junctional attachments with similar processes from adjacent cells or from the same cell. Longitudinal processes were longer, often extending for more than 20 microns and forming junctional attachments with other cells in the same column. Such processes often exhibited invaginations in which there were single fibrils or small groups of fibrils; this arrangement may be indicative of fibril elongation or may serve to transmit tension between the fibroblast and the collagen fibrils. This organization has interesting implications for the growth and function of other fibrous connective tissue, such as the periodontal ligament.

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Dose-response effects of colchicine and vinblastine on unimpeded eruption rates of the rat mandibular incisor

Cited by 20 publications

References 27 publications

A comparison between a conventional optical method and image-analysis for measuring the unimpeded eruption rate of the rat mandibular incisor

A comparison between a conventional optical method and image-analysis for measuring the unimpeded eruption rate of the rat mandibular incisor

Estimated Time of Biomineralization in Developing Rat Incisors

Three-dimensional organization of fibroblasts and collagen fibrils in rat tail tendon

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