615 resultados para jaw osteology


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Migraine and temporomandibular disorders (TMD) are highly prevalent conditions that frequently coexist in the same patient. The relationship between migraine and TMD is complex. Migraineurs often have pain in the TMD area; TMD sufferers, in turn, often experience headaches in addition to the pain in the jaw. Finally, migraine and TMD are comorbid, and the final phenotype of patients with the comorbidity may represent the aggregated contribution of both. Herein we briefly discuss the clinical commonalities of migraine and TMD, and the differential diagnosis of these conditions with other causes of facial pain. We close by presenting our experience in the treatment of patients with the comorbidity.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Two new species of brachycephalid frogs are described from Pico Marumbi, municipality of Morretes, and Pico da Igreja, municipality of Guaratuba, Parana State, southern Brazil. The new species share the following attributes: body bufoniform; skin on top of the head, and central part of the back body smooth with no dermal co-ossification; outer metatarsal tubercle distinct; dermal roofing bones of skull unornamented; all paired cranial bones distinct and not fused; quadratojugals, and maxillary odontoids present. The new species from Pico Marumbi is characterized by male SVL = 11.6-12.5 and female SVL = 13.0-14.5 turn; and general color orange with dorsal reddish-brown irregular markings, lateral surfaces with small dark brown spots, and belly with brownish spots and small dots. The new species from Pico da Igreja is characterized by male SVL = 12.6-13.9 and female SVL = 14.6-15.3 mm; and general color orange, lateral surfaces with small dark brown spots, and belly with brownish coalescent spots and small dots. Comparisons with other brachycephalid species and osteological data are provided.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

We review the information currently available on the reproduction of the Amphisbaenia and provide original data on the reproductive biology of four Neotropical species: Amphisbaena alba; A. mertensi; Cercolophia roberti, and Leposternon infraorbitale. In total, we compiled data for 22 species: 17 Amphisbaenidae, 1 Rhineuridae, 3 Bipedidae, and 1 Trogonophidae. The majority of the species were oviparous with the exceptions of Loveridgea ionidesii, Monopeltis anchietae, M. capensis, and Trogonophis wiegmanni. Viviparity was interpreted as a derived trait that evolved independently for at least 3 times within the Amphisbaenia. In most species, reproduction is synchronized with the hot and rainy season and seems to vary with latitude. Although Amphisbaenia eggs have been found in ant nests, it remains disputable whether this is an obligatory or even a preferable location for egg-laying. Incubation time in A. mertensii lasts 59 days and this is the first report encompassing egg-laying to hatching for any Amphisbaenia species. Nonetheless, a two months incubation period seems to be the common rule for oviparous Amphisbaenia. The general pattern of reproductive output in Amphisbaenia is characterized by a low number of eggs/embryos per clutch whose individual size is comparatively large in relation to adult body size. Eggs are markedly elongated on the long axis and arranged in-line within the abdominal cavity possibly to prevent/diminish biomechanic drawbacks of egg bearing. Hatchlings of A. mertensi possess an egg-tooth implanted at the upper jaw, exhibit positive geotropism, and display defensive behaviors known to be present in adults. Our review shows that our current knowledge of Amphisbaenia reproduction is fragmentary, often based on the examination of small samples, and heavily dependent on the publication of anedoctal observations. Future publications on this subject are encouraged.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Hyphessobrycon rutiliflavidus, new species, is described from the upper rio Paraguai in Cuiaba, State of Mato Grosso, Brazil. The new species differs from all other congeners by the following combination of characters: black humeral spot, slightly diffuse at its tips, and caudal-peduncle blotch present; midlateral body stripe conspicuous in its posteriormost portion, extending to the tips of the middle caudal rays; anal fin with iii, 15 to iv, 19 rays (mode iv, 17); upper jaw length, 42.3 to 49.5% of the head length; maxilla with 2-5 teeth (mode 3); all the fins of males reddish-orange and of females yellowish.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Ameloblastoma is an odontogenic tumor, usually benign, which rarely metastasizes to distant organs. The case of a 27-year-old white woman is described, who presented a metastatic pulmonary ameloblastoma 7 years after the removal of a mandibular ameloblastoma. She presented no pulmonary symptoms, but a lung nodule was found in a chest x-ray during a routine check-up for job admission. Computed tomography (CT) revealed a 2-cm well-defined solitary round nodule without calcifications, leading to the hypothesis of a metastatic tumor. Clinical and CT investigation confirmed no ameloblastoma recurrence in the jaw and no other primary tumor. The diagnosis of metastatic ameloblastoma was confirmed by microscopic evaluation of the pulmonary nodule.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Objective: The present study evaluated morphometrically bone loss percentages in experimental periodontitis in rats, comparing different locations (lingual mandible, palatal maxilla and buccal maxilla) and two evaluation methods (distance and area methods). Material and Methods: Ligatures were placed around the maxillary right second molar and around the mandibular right first molar in 14 female Wistar rats. The contralateral molars served as intragroup control. After 4 weeks, the rats were sacrificed and their mandible and maxilla were removed. The specimens were dissected and stained with methylene blue dye. Bone loss was evaluated by two different methods on the surfaces of the defleshed jaw. In the first method, the distance from the cementoenamel junction (CEJ) to the alveolar bone crest was measured in the roots of teeth associated with ligature. In the second method, the area of bone loss was determined using the alveolar tissue bone, CEJ and the proximal region of roots associated with the ligature as reference. The data were converted to bone loss percentages caused by ligature: (ligated - unligated) x 100/ligated. Results: When comparing the distance and area methods, no statistically significant difference was observed (p>0.05). Both methodologies indicated that the maxilla presented greater bone loss than the mandible and it was more accentuated on the buccal side than on the palatal side (p<0.05). Conclusions: The findings of this study show that both the area and the distance methods can be used to evaluate bone loss caused by ligature placement in rats, and suggest applying the morphometric methodology to the maxilla on the buccal side.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Têm-se notado vários estudos recentes em filogenia com os Cuculiformes, no entanto nestes trabalhos ainda há divergências. Apresenta-se aqui uma nova e ampla análise filogenética para os Cuculiformes com base em 250 caracteres da osteologia, comportamento e ecologia. Esta análise resultou em 18 cladogramas igualmente parcimoniosos (768 passos, IC = 0.4779, IR = 0.8080 e ICR = 0.3861). de acordo com o cladograma de consenso estrito se pode observar: a) o monofiletismo dos Cuculiformes; b) a ordem dividida em dois grupos: a) Coua/Carpococcyx e; b) demais cucos (Neomorphidae, (Crotophagidae, (Tapera/Dromoccoccyx, (Cuculidae))), no entanto a posição sistemática de Centropus é ambígua entre estes dois grandes grupos; c) os cucos terrestres basais e parafiléticos e os cucos arbóreos derivados e monofiléticos. Ainda, propõe-se que o comportamento de parasitar ninho tenha surgido duas vezes independentemente (uma em Tapera/Dromoccoccyx e outra dentro de Cuculidae).

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dez famílias são tradicionalmente agrupadas na Ordem Coraciiformes, Alcedinidae (martins-pescadores), Momotidae (udus e juruvas), Todidae ( todies ), Meropidae (abelharucos), Coraciidae (rolieiros), Brachypteraciidae ( ground-rollers ), Leptosomidae ( cuckoo-rollers ), Phoeniculidae ( woodhoopoes ), Upupidae (poupas-comuns) e Bucerotidae (calaus), mas não há caracteres na morfologia externa que sejam comuns a todos os membros da ordem. Assim, este trabalho apresenta uma comparação da osteologia craniana das espécies de Coraciiformes com a finalidade de encontrar caracteres osteológicos que possam diagnosticar a ordem ou grupos de táxons de Coraciiformes, servindo ainda como uma fonte de dados para futuras análises filogenéticas. Como constatado por dados da morfologia externa, os caracteres da osteologia craniana ratificaram a diversidade morfológica existente entre os táxons da Ordem Coraciiformes, sendo difícil diagnosticá-la ou encontrar caracteres comuns a todos os seus membros. Apenas dois caracteres são comuns à ordem, tais como a presença da fossa lateroesfenóide e a ausência do processo suprameático, embora tais caracteres também sejam encontrados em outros grupos de aves. Homologias primárias foram encontradas, indicando similaridades entre diversas famílias, tais como: a zona flexória craniofacial é oclusa nos indiviíduos adultos de Coraciidae, Leptosomidae, Phoeniculidae, Upupidae e Bucerotidae; a fossa temporal tem desenvolvimento e profundidade intermediários em Momotidae, Meropidae, Coraciidae, Brachypteraciidae e Bucerotidae; o lacrimal está ausente em Momotidae, fundido com o ectetmóide nos adultos de Upupidae, Phoeniculidae e Bucerotidae, e presente e distinto em Alcedinidae, Todidae, Meropidae, Coraciidae, Brachypteraciidae e Leptosomidae; e o processo retroarticular da mandíbula é desenvolvido em Upupidae, Phoeniculidae e Bucerotidae.