Abstract：
INTRODUCTION:Intact neural supply is necessary for tooth eruption. Sympathetic denervation accelerates or decelerates the eruption rate depending on the tooth condition (intact or injured). The aim of this study is to reexamine the role of the sympathetic innervation, through the observation of the effects of pre or post ganglionic chemical sympathectomy on the eruption of intact rat incisors. MATERIALS AND METHODS:Different groups of rats were subjected to either ganglionic or peripheral chemical sympathectomy and the observed effects on incisor eruption were compared to those made on intact/sham groups or on rats subjected to inferior alveolar nerve (IAN) lesion. RESULTS:The total amount of eruption in control/naïve rats, measured over a total period of 144 h, was 3 ± 0.15 mm and decreased to 2.57 ± 0.06 mm (n = 8; p < 0.01) or 2.8 ± 0.10 mm (n = 8; p < 0.05) following treatment with guanethidine and hexamethonium, respectively. This amount decreased to 1.8 ± 0.14 mm (p < 0.001 vs. control, n = 7; or p < 0.01 vs. sham, n = 5) in rats subjected to IAN lesion. CONCLUSION:Sympathectomy delayed tooth eruption. Blocking the sympathetic effectors with guanethidine exerted more potent effects than ganglionic block with hexamethonium. Intact sympathetic supply is required for tooth growth under normal conditions.
journal_name
Arch Oral Bioljournal_title
Archives of oral biologyauthors
Chidiac JJ,Kassab A,Rifai K,Saadé NE,Al Chaer EDdoi
10.1016/j.archoralbio.2018.02.003subject
Has Abstractpub_date
2018-05-01 00:00:00pages
31-36eissn
0003-9969issn
1879-1506pii
S0003-9969(18)30030-Xjournal_volume
89pub_type
杂志文章abstract：OBJECTIVES:Dental evolution affects the geometry of the tooth, but the adaptive relevance of these changes is related to tooth sharpness, complexity, and relief (topography). On a set of laboratory mice, we assessed how wear related to age and food consistency affected molar geometry and topography. DESIGN:Three group...
journal_title：Archives of oral biology
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journal_title：Archives of oral biology
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journal_title：Archives of oral biology
pub_type： 杂志文章
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journal_title：Archives of oral biology
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更新日期：2018-09-01 00:00:00
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journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(89)90075-7
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更新日期：2014-09-01 00:00:00
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journal_title：Archives of oral biology
pub_type： 杂志文章
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更新日期：2013-02-01 00:00:00
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更新日期：2011-02-01 00:00:00
