Molar form, enamel growth, and durophagy in Cercocebus and Lophocebus
Molar form, enamel growth, and durophagy in Cercocebus and Lophocebus
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DOI：
10.1002/ajpa.24592
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发表时间：
2022-07-19
期刊：
影响因子：
--
通讯作者：
McGraw, W. Scott
中科院分区：
文献类型：
--
作者：
Guatelli-Steinberg, Debbie;Schwartz, Gary T.;O'Hara, Mackie C.;Gurian, Kaita;Rychel, Jess;McGraw, W. Scott
为了验证这一假设，即Cercocebus和Lophocebus磨牙的冠结构，釉质生长和冠几何形状的差异与这两个属的摄食策略（习惯性与后备durophagy，分别）的差异有关。相对于Lophocebus磨牙，Cercocebus磨牙预计具有更大的抗断裂性相关的功能，并在这些功能相关的釉质生长参数不同。样品种源如下：Cercocebus atys臼齿来自象牙海岸的Taurus森林; Lophocebus albigena臼齿来自刚果共和国Makoua北部的一个地点; Lophocebus atterimus臼齿来自刚果民主共和国Lomako森林。对于测量臼齿形态的μCT扫描，Cercocebus的样本量范围为5 - 35，Lophocebus的样本量范围为3 - 12。上臼齿的子样本进行物理切片，以测量釉质生长变量。部分作为其较大的尺寸的函数，Cercocebus磨牙有显着更大的绝对冠强度（ACS）比Lophocebus磨牙，支持这一假设。Cercocebus的更高的冠高是通过更快的釉质延伸速率实现的。也支持这一假设，磨牙耀斑和比例咬合盆釉质厚度显着更大的Cercocebus。相对釉质厚度（RET），但是，显着更大的Lophocebus。如果ACS是一个更好的预测骨折阻力比RET，那么Cercocebus磨牙可能比Lophocebus更耐骨折。较大的磨牙外展和成比例的咬合盆厚度也可能提供Cercocebus磨牙更大的抗折力。
To test the hypothesis that differences in crown structure, enamel growth, and crown geometry in Cercocebus and Lophocebus molars covary with differences in the feeding strategies (habitual vs. fallback durophagy, respectively) of these two genera. Relative to Lophocebus molars, Cercocebus molars are predicted to possess features associated with greater fracture resistance and to differ in enamel growth parameters related to these features. Sample proveniences are as follows: Cercocebus atys molars are from the Taï Forest, Ivory Coast; Lophocebus albigena molars are from a site north of Makoua, Republic of Congo; and a Lophocebus atterimus molar is from the Lomako Forest, Democratic Republic of Congo. For μCT scans on which aspects of molar form were measured, sample sizes ranged from 5 to 35 for Cercocebus and 3 to 12 for Lophocebus. A subsample of upper molars was physically sectioned to measure enamel growth variables. Partly as a function of their larger size, Cercocebus molars had significantly greater absolute crown strength (ACS) than Lophocebus molars, supporting the hypothesis. Greater crown heights in Cercocebus are achieved through faster enamel extension rates. Also supporting the hypothesis, molar flare and proportional occlusal basin enamel thickness were significantly greater in Cercocebus. Relative enamel thickness (RET), however, was significantly greater in Lophocebus. If ACS is a better predictor of fracture resistance than RET, then Cercocebus molars may be more fracture resistant than those of Lophocebus. Greater molar flare and proportional occlusal basin thickness might also afford Cercocebus molars greater fracture resistance.
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影响因子：
3.4
作者：
Almotairy N;Kumar A;Grigoriadis A
通讯作者：
Grigoriadis A
比较人搪瓷和羟基磷灰石疲劳裂纹的生长。
影响因子：
14
作者：
Bajaj, Devendra;Nazari, Ahmad;Eidelman, Naomi;Arola, Dwayne D.
通讯作者：
Arola, Dwayne D.
DOI：
10.2307/2798801
发表时间：
1970-01-01
期刊：
MAN
影响因子：
--
作者：
JOLLY, CJ
通讯作者：
JOLLY, CJ
DOI：
10.1002/ar.23703
发表时间：
2018-01-01
影响因子：
2
作者：
Guatelli-Steinberg, Debbie;Pampush, James D.;Ferrell, Rebecca J.
通讯作者：
Ferrell, Rebecca J.
影响因子：
3.2
作者：
Guatelli-Steinberg, Debbie;Floyd, Bruce A.;Reid, Donald J.
通讯作者：
Reid, Donald J.