Abstract:
:Masticatory efficiency depends upon the ability of the molar cusps to apply concentrated bite forces to food particles and simultaneously to withstand the dental stresses that may cause enamel fracture. This study investigated how low-crowned molar cusps in omnivorous mammals, specifically humans, Homo sapiens, and pigs, Sus scrofa, resist fracture under compressive load. A uniaxial compressive load was applied to individual molar cusps with a materials testing machine. The progressive loading and deformation of the cusps were recorded for interrupted and continuous tests. In interrupted tests, the appearance of progressive cusp fracture was recorded. Stiffness and fracture stresses were calculated from continuous test results. Pig cusps responded to both interrupted and continuous loads with greater deformation; progressive crumbling of the cusp tip resulted in new occlusal contacts on enamel lophs. Conversely, human cusps showed minimal breakage before failure. Continuous compressive tests demonstrated the greater stiffness of human cusps, as well as the capacity to sustain higher cusp tip stresses. The greater stiffness and high fracture resistance of human cusps may be attributed to the thickness of enamel. Test results reflected fundamentally different means of crown stress management that correspond with phylogenetic differences in masticatory function.
journal_name
Arch Oral Bioljournal_title
Archives of oral biologyauthors
Popowics TE,Rensberger JM,Herring SWdoi
10.1016/s0003-9969(00)00102-3subject
Has Abstractpub_date
2001-01-01 00:00:00pages
1-12issue
1eissn
0003-9969issn
1879-1506pii
S0003-9969(00)00102-3journal_volume
46pub_type
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journal_title:Archives of oral biology
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更新日期:1998-04-01 00:00:00
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更新日期:2013-04-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章,评审
doi:10.1016/j.archoralbio.2012.11.008
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVE:Juberg-Hayward syndrome (JHS; MIM 216100) is a rare autosomal recessive malformation syndrome, characterized by cleft lip/palate, microcephaly, ptosis, hypoplasia or aplasia of thumbs, short stature, dislocation of radial head, and fusion of humerus and radius leading to elbow restriction. A homozygous mutati...
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doi:10.1016/j.archoralbio.2020.104918
更新日期:2020-11-01 00:00:00
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更新日期:2012-05-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/s0003-9969(02)00201-7
更新日期:2003-02-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2017.05.013
更新日期:2017-09-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
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abstract::Platelet-activating factor (1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine; PAF) is a biologically active lipid, like the prostaglandins, which mediates allergic and inflammatory reactions. Aggregation of washed rabbit platelets was induced by a lipid prepared from inflamed gingiva. The mobility of the active lipid wa...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/0003-9969(89)90044-7
更新日期:1989-01-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2018.11.015
更新日期:2019-02-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2017.04.028
更新日期:2017-09-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/0003-9969(87)90104-x
更新日期:1987-01-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2020.104771
更新日期:2020-09-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/0003-9969(93)90105-u
更新日期:1993-11-01 00:00:00
abstract:AIM:This study was planned to investigate whether smoker patients with inflammatory periodontal disease exhibit different salivary concentrations of C-telopeptide pyridinoline cross-links of type I collagen (ICTP) and osteocalcin (OC) compared to the non-smoker and/or ex-smoker counterparts. METHODS:Whole saliva sampl...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2009.09.009
更新日期:2009-12-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/s0003-9969(00)00011-x
更新日期:2000-06-01 00:00:00
abstract::Recent reports characterizing the physiological properties of normal human labial acini are reviewed with particular emphasis on mechanisms related to fluid secretion. In contrast to the salivary glands of several experimental animals, human labial acinar cells do not appear to have a1-adrenergic receptors, substance ...
journal_title:Archives of oral biology
pub_type: 杂志文章,评审
doi:10.1016/s0003-9969(99)00044-8
更新日期:1999-05-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2011.01.010
更新日期:2011-09-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2005.09.003
更新日期:2006-04-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/0003-9969(83)90090-0
更新日期:1983-01-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2019.104601
更新日期:2020-02-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2019.06.009
更新日期:2019-09-01 00:00:00
abstract:BACKGROUND:Interleukin-6 (IL-6) is a potent stimulator of osteoclastic bone resorption. Osteoblast secretion of IL-6 plays an important role in the regulation of bone metabolism. Angiotensin II (Ang II) has been shown to regulate the expression of potent inflammatory factors, including MCP-1 and IL-6, by stimulating en...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2010.09.016
更新日期:2011-03-01 00:00:00
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journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/s0003-9969(00)00105-9
更新日期:2001-02-01 00:00:00
abstract:OBJECTIVE:This study investigated the effect of subinhibitory concentrations of gentian violet on the germ tube formation by Candida albicans and its adherence ability to oral epithelial cells. METHODS:Thirty strains of C. albicans isolated from denture wearers, normal healthy individuals and HIV positive patients wer...
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pub_type: 杂志文章
doi:10.1016/j.archoralbio.2017.05.016
更新日期:2017-10-01 00:00:00
abstract::Parotid salivation was stimulated by infusion of bethanechol chloride into anaesthetized brushtail possums to ascertain maximal flow rates, salivary composition and dietary adaptations of salivary function. Secretion rates for one gland ranged from 5.3 +/- 0.16 to 84.3 +/- 3.20 microliters/min (2.4 +/- 0.07 to 37.8 +/...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/0003-9969(94)90127-9
更新日期:1994-04-01 00:00:00
abstract:OBJECTIVE:Streptococcus mutans, a gram-positive oral bacterium, has been identified as one of the principal etiological agents of human dental caries. To clarify the nature of the difference anti-biofilm effect against S. mutans between Assam tea from Camellia sinensis var. assamica, partially fermented, and green tea ...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2016.04.002
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:The existence of stem/progenitor cells in dental tissue has been suggested but their characterization in the human tooth germ remains elusive. The purpose of this study was to investigate these cells in human dental follicles and dental papillae at the crown-forming stage and compare their potential for hard ...
journal_title:Archives of oral biology
pub_type: 杂志文章
doi:10.1016/j.archoralbio.2009.10.011
更新日期:2010-01-01 00:00:00