The Experts below are selected from a list of 4857 Experts worldwide ranked by ideXlab platform
Stacey Schmidt - One of the best experts on this subject based on the ideXlab platform.
-
sex differences in anthropoid Mandibular Canine lateral enamel formation
American Journal of Physical Anthropology, 2009Co-Authors: Debbie Guatellisteinberg, Rebecca J Ferrell, J E Spence, Tiffany Talabere, Amelia R Hubbard, Stacey SchmidtAbstract:Previous research has demonstrated that great ape and macaque males achieve large Canine crown sizes primarily through extended Canine growth periods. Recent work has suggested, however, that platyrrhine males may achieve larger Canine sizes by accelerating rather than prolonging growth. This study tested the hypothesis that the ontogenetic pathway leading to Canine sexual dimorphism in catarrhines differs from that of platyrrhines. To test this hypothesis, males and females of several catarrhine genera (Hylobates, Papio, Macaca, Cercopithecus, and Cercocebus) and three platyrrhine genera (Cebus, Ateles, and Callicebus) were compared in the number and spacing of perikymata (enamel growth increments) on their Canine crowns. In addition, perikymata periodicities (the number of days of growth perikymata represent) were determined for five genera (Hylobates, Papio, Macaca, Cebus, and Ateles) using previously published as well as original data gathered for this study. The central findings are as follows: 1) males have more perikymata than females for seven of eight genera (in five of the seven, the differences are statistically significant); 2) in general, the greater the degree of sexual dimorphism, the greater the sex difference in male and female perikymata numbers; 3) there is no evidence of a systematic sex difference in primate periodicities; and 4) there is some evidence that sex differences in enamel formation rates may make a minor contribution to Canine sexual dimorphism in Papio and Cercopithecus. These findings strongly suggest that in both catarrhines and platyrrhines prolongation of male Canine growth is the primary mechanism by which Canine crown sexual dimorphism is achieved.
Debbie Guatellisteinberg - One of the best experts on this subject based on the ideXlab platform.
-
sex differences in anthropoid Mandibular Canine lateral enamel formation
American Journal of Physical Anthropology, 2009Co-Authors: Debbie Guatellisteinberg, Rebecca J Ferrell, J E Spence, Tiffany Talabere, Amelia R Hubbard, Stacey SchmidtAbstract:Previous research has demonstrated that great ape and macaque males achieve large Canine crown sizes primarily through extended Canine growth periods. Recent work has suggested, however, that platyrrhine males may achieve larger Canine sizes by accelerating rather than prolonging growth. This study tested the hypothesis that the ontogenetic pathway leading to Canine sexual dimorphism in catarrhines differs from that of platyrrhines. To test this hypothesis, males and females of several catarrhine genera (Hylobates, Papio, Macaca, Cercopithecus, and Cercocebus) and three platyrrhine genera (Cebus, Ateles, and Callicebus) were compared in the number and spacing of perikymata (enamel growth increments) on their Canine crowns. In addition, perikymata periodicities (the number of days of growth perikymata represent) were determined for five genera (Hylobates, Papio, Macaca, Cebus, and Ateles) using previously published as well as original data gathered for this study. The central findings are as follows: 1) males have more perikymata than females for seven of eight genera (in five of the seven, the differences are statistically significant); 2) in general, the greater the degree of sexual dimorphism, the greater the sex difference in male and female perikymata numbers; 3) there is no evidence of a systematic sex difference in primate periodicities; and 4) there is some evidence that sex differences in enamel formation rates may make a minor contribution to Canine sexual dimorphism in Papio and Cercopithecus. These findings strongly suggest that in both catarrhines and platyrrhines prolongation of male Canine growth is the primary mechanism by which Canine crown sexual dimorphism is achieved.
Ali Gholinia - One of the best experts on this subject based on the ideXlab platform.
-
root canal morphology of Mandibular Canine in an iranian population a cbct assessment
iranian endodontic journal, 2017Co-Authors: Ali Soleymani, Nafiseh Namaryan, Ehsan Moudi, Ali GholiniaAbstract:Introduction: The present study was conducted to assess the morphology of Mandibular Canines using cone-beam computed tomography (CBCT) in a north Iranian population. Methods and Materials: For the morphological assessment of Mandibular Canines, 150 CBCT images taken from patients for different reasons were used. The Mandibular Canines were examined in sagittal, coronal and axial dimensions. The canal pattern, number of roots/canals, the tooth length, the orientation of the roots and the position of the apical foramina were evaluated and the effect of gender on each variable was assessed. The obtained data were analyzed using the Chi-square and student’s t-tests. Results: According to the Vertucci’s criteria, the most common pattern was type I morphology (89.7%), followed by types III (5.7%), II (3.7%) and V (1%). No significant differences were observed between the male and female patients in terms of canal type ( P >0.05). Gender difference is a factor which affected the root length and the number of Mandibular Canine root and root canal. There were 296 single-root and four double-root Canines. The double-root Canines and Mandibular Canine with two canals were significantly more common among men than women ( P =0.00). The apical foramen was laterally positioned in 68.3% and centrally in 31.7% of the cases, and the root curvatures were mostly oriented toward the buccal region. No significant statistical difference was observed for mentioned parameters in right and left half of the jaw. Conclusion: Due the diverse morphology and the potential presence of a second Mandibular Canine among Iranians, dentists should perform endodontic treatments with greater care. CBCT is an accurate tool for the morphological assessment of root canals. Keywords: Canine; Cone-Beam Computed Tomography; Root Canals
Amelia R Hubbard - One of the best experts on this subject based on the ideXlab platform.
-
sex differences in anthropoid Mandibular Canine lateral enamel formation
American Journal of Physical Anthropology, 2009Co-Authors: Debbie Guatellisteinberg, Rebecca J Ferrell, J E Spence, Tiffany Talabere, Amelia R Hubbard, Stacey SchmidtAbstract:Previous research has demonstrated that great ape and macaque males achieve large Canine crown sizes primarily through extended Canine growth periods. Recent work has suggested, however, that platyrrhine males may achieve larger Canine sizes by accelerating rather than prolonging growth. This study tested the hypothesis that the ontogenetic pathway leading to Canine sexual dimorphism in catarrhines differs from that of platyrrhines. To test this hypothesis, males and females of several catarrhine genera (Hylobates, Papio, Macaca, Cercopithecus, and Cercocebus) and three platyrrhine genera (Cebus, Ateles, and Callicebus) were compared in the number and spacing of perikymata (enamel growth increments) on their Canine crowns. In addition, perikymata periodicities (the number of days of growth perikymata represent) were determined for five genera (Hylobates, Papio, Macaca, Cebus, and Ateles) using previously published as well as original data gathered for this study. The central findings are as follows: 1) males have more perikymata than females for seven of eight genera (in five of the seven, the differences are statistically significant); 2) in general, the greater the degree of sexual dimorphism, the greater the sex difference in male and female perikymata numbers; 3) there is no evidence of a systematic sex difference in primate periodicities; and 4) there is some evidence that sex differences in enamel formation rates may make a minor contribution to Canine sexual dimorphism in Papio and Cercopithecus. These findings strongly suggest that in both catarrhines and platyrrhines prolongation of male Canine growth is the primary mechanism by which Canine crown sexual dimorphism is achieved.
Tiffany Talabere - One of the best experts on this subject based on the ideXlab platform.
-
sex differences in anthropoid Mandibular Canine lateral enamel formation
American Journal of Physical Anthropology, 2009Co-Authors: Debbie Guatellisteinberg, Rebecca J Ferrell, J E Spence, Tiffany Talabere, Amelia R Hubbard, Stacey SchmidtAbstract:Previous research has demonstrated that great ape and macaque males achieve large Canine crown sizes primarily through extended Canine growth periods. Recent work has suggested, however, that platyrrhine males may achieve larger Canine sizes by accelerating rather than prolonging growth. This study tested the hypothesis that the ontogenetic pathway leading to Canine sexual dimorphism in catarrhines differs from that of platyrrhines. To test this hypothesis, males and females of several catarrhine genera (Hylobates, Papio, Macaca, Cercopithecus, and Cercocebus) and three platyrrhine genera (Cebus, Ateles, and Callicebus) were compared in the number and spacing of perikymata (enamel growth increments) on their Canine crowns. In addition, perikymata periodicities (the number of days of growth perikymata represent) were determined for five genera (Hylobates, Papio, Macaca, Cebus, and Ateles) using previously published as well as original data gathered for this study. The central findings are as follows: 1) males have more perikymata than females for seven of eight genera (in five of the seven, the differences are statistically significant); 2) in general, the greater the degree of sexual dimorphism, the greater the sex difference in male and female perikymata numbers; 3) there is no evidence of a systematic sex difference in primate periodicities; and 4) there is some evidence that sex differences in enamel formation rates may make a minor contribution to Canine sexual dimorphism in Papio and Cercopithecus. These findings strongly suggest that in both catarrhines and platyrrhines prolongation of male Canine growth is the primary mechanism by which Canine crown sexual dimorphism is achieved.