scholarly journals The Pneumatization of the Facial Skeleton in the Japanese Macaque (Macaca fuscata). A Study Based on Computerized Three-Dimensional Reconstructions.

1996 ◽  
Vol 104 (1) ◽  
pp. 31-41 ◽  
Author(s):  
THOMAS KOPPE ◽  
YOSHIHIRO INOUE ◽  
YOSHIO HIRAKI ◽  
HIROSHI NAGAI
Keyword(s):  
Macaca Fuscata ◽  
Japanese Macaque ◽  
Three Dimensional ◽  
Facial Skeleton

scholarly journals Subspecies and sexual craniofacial size and shape variations in Japanese macaques (Macaca fuscata)

2018 ◽  
Author(s):  
Wataru Yano ◽  
Naoko Egi ◽  
Tomo Takano ◽  
Naomichi Ogihara
Keyword(s):  
Macaca Fuscata ◽  
Japanese Macaque ◽  
Three Dimensional ◽  
Principal Component ◽  
Shape Space ◽  
Size Difference ◽  
Shape Variation ◽  
Three Dimensional Model ◽  
Temporal Fossa ◽  
Size And Shape

AbstractIn order to investigate craniofacial size and three-dimensional shape variations independently in the Japanese macaque (Macaca fuscata) we used a geometric morphometries technique. A total of 55 specimens were CT scanned to generate a three-dimensional model of each cranium, and 57 landmarks were digitized to analyze the craniofacial shape variation in the Japanese macaque. The results showed that four intra-specific groups, consisting of two subspecies and the two sexes, differed in both size and shape space. In size, the cranium of the Macaca fuscata yakui (MFY) was smaller than that of Macaca fuscata fuscata (MFF) in both sexes, and female crania were smaller than male crania in both subspecies. Shape sexual dimorphisms in both subspecies were detected in the first axis of principal component analysis and were related to a relatively broad orbit, smaller neurocranium, enlarged snout, and broader temporal fossa in males. The shape differences between subspecies showed different features than those between sexes. Male subspecies shape differences were detected in the first and third axes, while those for females were in the first and second axes. Subspecies shape differences common to both sexes were a narrower orbit, relatively small neurocranium, longer snout, and postorbital constriction in MFY. Male MFY was specifically characterized by a more anterior and superior direction of snout protrusion. In contrast, female MFY showed an inferior direction of snout protrusion. Female MFY also had a taller orbit. With regard to the relationship between size and shape differences, shape sexual dimorphism for each subspecies was positively associated with size difference, but there was no such association between subspecies in either sex. Size does not seem to play an important role in subspeciation of Macaca fuscata.

scholarly journals Comparison of Tooth- and Bone-Borne Appliances on the Stress Distributions and Displacement Patterns in the Facial Skeleton in Surgically Assisted Rapid Maxillary Expansion—A Finite Element Analysis (FEA) Study

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1152
Author(s):  
Rafał Nowak ◽  
Anna Olejnik ◽  
Hanna Gerber ◽  
Roman Frątczak ◽  
Ewa Zawiślak
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Rapid Maxillary Expansion ◽  
Stress Distributions ◽  
Maxillary Expansion ◽  
Facial Skeleton ◽  
Element Analysis ◽  
Maxillary Constriction

The aim of this study was to compare the reduced stresses according to Huber’s hypothesis and the displacement pattern in the region of the facial skeleton using a tooth- or bone-borne appliance in surgically assisted rapid maxillary expansion (SARME). In the current literature, the lack of updated reports about biomechanical effects in bone-borne appliances used in SARME is noticeable. Finite element analysis (FEA) was used for this study. Six facial skeleton models were created, five with various variants of osteotomy and one without osteotomy. Two different appliances for maxillary expansion were used for each model. The three-dimensional (3D) model of the facial skeleton was created on the basis of spiral computed tomography (CT) scans of a 32-year-old patient with maxillary constriction. The finite element model was built using ANSYS 15.0 software, in which the computations were carried out. Stress distributions and displacement values along the 3D axes were found for each osteotomy variant with the expansion of the tooth- and the bone-borne devices at a level of 0.5 mm. The investigation showed that in the case of a full osteotomy of the maxilla, as described by Bell and Epker in 1976, the method of fixing the appliance for maxillary expansion had no impact on the distribution of the reduced stresses according to Huber’s hypothesis in the facial skeleton. In the case of the bone-borne appliance, the load on the teeth, which may lead to periodontal and orthodontic complications, was eliminated. In the case of a full osteotomy of the maxilla, displacements in the buccolingual direction for all the variables of the bone-borne appliance were slightly bigger than for the tooth-borne appliance.

scholarly journals Spontaneous Peritoneal Malignant Mesothelioma in a Geriatric Japanese Macaque (Macaca fuscata)

2007 ◽  
Vol 56 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Jyoji YAMATE ◽  
Akitada TOMITA ◽  
Mitsuru KUWAMURA ◽  
Fusako MITSUNAGA ◽  
Shin NAKAMURA
Keyword(s):  
Malignant Mesothelioma ◽  
Macaca Fuscata ◽  
Japanese Macaque

scholarly journals Usefulness of Surgical Simulation on Actual Plaster Model Formed by Integration of Three-Dimensional Dentition and Facial Skeleton Images

2013 ◽  
Vol 23 (1) ◽  
pp. 15-24 ◽  
Author(s):  
YUSUKE ASAMA ◽  
TATSUO SHIROTA ◽  
HARUHISA NAKANO ◽  
TETSUTARO YAMAGUCHI ◽  
SATORU SHINTANI ◽  
...  
Keyword(s):  
Surgical Simulation ◽  
Three Dimensional ◽  
Facial Skeleton ◽  
Plaster Model

Mother to Fetus Transfer of Hydroxylated Polychlorinated Biphenyl Congeners (OH-PCBs) in the Japanese Macaque (Macaca fuscata): Extrapolation of Exposure Scenarios to Humans

2020 ◽  
Vol 54 (18) ◽  
pp. 11386-11395
Author(s):  
Kei Nomiyama ◽  
Yusuke Tsujisawa ◽  
Emiko Ashida ◽  
Syuji Yachimori ◽  
Akifumi Eguchi ◽  
...  
Keyword(s):  
Macaca Fuscata ◽  
Polychlorinated Biphenyl ◽  
Japanese Macaque

scholarly journals Asbestosis in a Japanese Macaque (Macaca fuscata)

2015 ◽  
Vol 43 (7) ◽  
pp. 1035-1039
Author(s):  
Kosuke Tsugo ◽  
Akane Kashimura ◽  
Yumi Une
Keyword(s):  
Macaca Fuscata ◽  
Japanese Macaque

scholarly journals Pediatric Mandibular Resection and Reconstruction: Long-Term Results with Autogenous Rib Grafts

2010 ◽  
Vol 3 (1) ◽  
pp. 25-32 ◽  
Author(s):  
André M. Eckardt ◽  
Enno-Ludwig Barth ◽  
Johannes Berten ◽  
Nils-Claudius Gellrich
Keyword(s):  
Tumor Resection ◽  
Three Dimensional ◽  
Bone Defects ◽  
Long Term Results ◽  
Benign Tumors ◽  
Tumor Surgery ◽  
Bone Augmentation ◽  
Facial Skeleton ◽  
Computed Tomographic

Reconstruction of mandibular defects following tumor resection in infants is a particular challenge. Although autogenous rib grafts have no relevance in the restoration of mandibular bone defects occurring after ablative tumor surgery due to limited bone stock and the availability of other donor areas, they are a useful surgical alternative following tumor surgery in infants. We here report on a 2, 5, 8, and 15-year follow-up of four children who were diagnosed with benign tumors of the mandible with osseous destruction at the age of 4, 6, 15, and 18 months, respectively. Histologic diagnoses were melanotic neuroectodermal tumor ( n=2), hemangioendothelioma of the mandible ( n=1), and ameloblastoma ( n=1). Following continuity resection of the mandible, lateromandibular bone defects were restored using autogenous rib grafts. Both clinical and radiologic follow-up visits were performed for all children to assess growth of the facial skeleton and the mandible. One child was already further reconstructed using bone augmentation at the age of 15 years. Cephalometric measurements on panorex films and three-dimensional computed tomographic scans revealed a slight vertical growth excess and transversal growth inhibition of the reconstructed mandible compared with the nonoperated side. Although further growth of rib grafts is difficult to predict and occlusal disharmony may occur due to physiologic maxillary growth and growth of the unaffected mandible, we believe that autogenous rib grafts can be ideally used for the restoration of mandibular continuity defects in newborns and young children. Clinical follow-up visits on a yearly basis and orthodontic controls are useful for early orthodontic treatment of growth deficits. Further corrective surgery with bone augmentation or osseous distraction is required following completion of growth of the facial skeleton.

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