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1.
Braz. j. otorhinolaryngol. (Impr.) ; 85(2): 136-143, Mar.-Apr. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001548

ABSTRACT

Abstract Introduction: The type of endoscopic approach chosen for vidian neurectomy can be specified by evaluating the vidian canal and the surrounding sphenoid sinus structures. Objective: The variations and morphometry of the vidian canal were investigated, focusing on the functional correlations between them which are crucial anatomical landmarks for preoperative planning. Methods: This study was performed using paranasal multidetector computed tomography images that were obtained with a section thickening of 0.625 mm of 250 adults. Results: The distributions of 500 vidian canal variants were categorized as follows; Type 1, within the sphenoid corpus (55.6%); Type 2, partially protruding into the sphenoid sinus (34.8%); Type 3, within the sphenoid sinus (9.6%). The pneumatization of the pterygoid process is mostly seen in vidian canal Type 2 (72.4%) and Type 3 (95.8%) (p < 0.001). The mean distances from the vidian canal to the foramen rotundum and the palatovaginal canal were greater in the vidian canal Type 2 and 3 with the pterygoid process pneumatization (p < 0.001). The prevalence of the intrasphenoid septum between the vidian canal and the vomerine crest and lateral attachment which ending on carotid prominence were much higher in vidian canal Type 3 than other types (p < 0.001). The mean angle between the posterior end of the middle turbinate and the lateral margin of the anterior opening of the vidian canal was measured as 33.05 ± 7.71°. Conclusions: Preoperative radiologic analysis of the vidian canal and the surrounding structures will allow surgeons to choose an appropriate endoscopic approach to ensure predictable postoperative outcomes.


Resumo Introdução: O tipo de abordagem endoscópica para a neurectomia do vidiano pode ser definido pela avaliação do canal do vidiano e das estruturas adjacentes aos seios esfenoidais. Objetivo: Investigar as variações e a morfometria do canal vidiano com enfoque nas suas correlações funcionais, pois são parâmetros anatômicos cruciais para o planejamento pré-operatório. Método: Esse estudo foi realizado utilizando-se imagens de tomografia computadorizada multidetectores dos seios paranasais com espessura de corte de 0,625 mm obtidas de 250 indivíduos adultos. Resultados: A distribuição das 500 variantes do canal vidiano foi categorizada da seguinte forma: Tipo 1, dentro do corpo ósseo esfenoidal (55,6%); Tipo 2, protrusão parcial no interior do seio esfenoidal (34,8%); Tipo 3, no interior do seio esfenoidal (9,6%). A pneumatização do processo pterigoide foi observada principalmente no canal vidiano Tipo 2 (72,4%) e Tipo 3 (95,8%) (p < 0,001). As distâncias médias do canal vidiano até o forame redondo e o canal palatovaginal foram maiores no canal vidiano do Tipo 2 e 3, com a pneumatização do processo pterigoide (p < 0,001). A presença do septo intraesfenoidal entre o canal vidiano e a crista vomeriana e a extensão lateral, que termina na proeminência da carótida, foi muito maior no canal vidiano Tipo 3 do que nos outros tipos (p < 0,001). A angulação média entre a cauda da concha média e a margem lateral da abertura anterior do canal vidiano foi de 33,05° ± 7,71°. Conclusões: A análise radiológica pré-operatória do canal do vidiano e das estruturas circunjacentes permitem ao cirurgião escolher uma abordagem endoscópica apropriada e prever resultados pós-operatórios.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Young Adult , Sphenoid Sinus/anatomy & histology , Sphenoid Sinus/diagnostic imaging , Denervation/methods , Pterygopalatine Fossa/anatomy & histology , Pterygopalatine Fossa/diagnostic imaging , Multidetector Computed Tomography/methods , Reference Values , Reproducibility of Results , Retrospective Studies , Anatomic Landmarks
2.
Int. j. med. surg. sci. (Print) ; 3(1): 767-769, 2016. ilus
Article in Spanish | LILACS | ID: lil-790604

ABSTRACT

El edentulismo parcial en el sector posterior del hueso maxilar, es producido principalmente por la pérdida de molares debido a caries, enfermedad periodontal y al exceso de fuerza soportado por losdientes de este sector. Implantes dentales mayores a 10 mm, raramente son colocados en estas zona debido auna mayor probabilidad de fracasos por el escaso volumen óseo y deficiente calidad del hueso. En el cráneo, en relación posterior a la maxila encontramos un arbotante pterigomaxilar. Este permite, en algunas situaciones, la rehabilitación de maxilares atróficos mediante la colocación de implantes con una angulación parasinusal, evitando técnicas quirúrgicas o procedimiento más complejos. El implante pterigoideo es un posible tratamiento para rehabilitar el sector posterior del maxilar atrófico, anclado en hueso cortical del proceso pterigoides. Se reporta un caso de utilización de implantes pterigoídeos en una mujer de 58 años de edad con gran neumatización en ambos senos maxilares, con un remanente de hueso alveolar de 1-2 mm.


The partially edentulous in the posterior maxilla bone is produced mainly by the loss of molars due to caries, periodontal disease and excessive force supported by the teeth of this sector. Dental implants greater than 10 mm, are rarely placed in this area due to a higher probability of failure for the low bone volume and bone quality poor. In the skull, in the post jawbone relationship, we find a pterygomaxillary buttress. This allows, in some situations, the rehabilitation of atrophic jaws by placing implants with a parasinusal angulation, avoiding surgical techniques or more complex procedure. The pterygoid implant is a possible treatment to rehabilitate the atrophic posterior maxilla, anchored in cortical bone of the pterygoid process. A case of placement of pterygoid implants in a woman 58 years old with a large pneumatization in both maxillary sinuses, with a remaining alveolar bone 1-2 mm is reported.


Subject(s)
Humans , Female , Middle Aged , Jaw, Edentulous, Partially/surgery , Dental Implantation, Endosseous/methods , Maxilla/surgery , Periodontal Atrophy/surgery , Sphenoid Bone
3.
Anatomy & Cell Biology ; : 143-150, 2016.
Article in English | WPRIM | ID: wpr-26899

ABSTRACT

Understanding of morphological structures such as the sphenoid spine and pterygoid processes is important during lateral transzygomatic infratemporal fossa approach. In addition, osseous variations such as pterygospinous and pterygoalar bridges are significant in clinical practice because they can produce various neurological disturbances or block the passage of a needle into the trigeminal ganglion through the foramen ovale. Two hundred and eighty-four sides of Korean adult dry skulls were observed to carry out morphometric analysis of the lateral plate of the pterygoid process, to investigate, for the first time among Koreans, the incidence of the pterygospinous and pterygoalar bony bridges, to compare the results with those available for other regional populations, and to discuss their clinical relevance as described on literatures. The mean of maximum widths of the left and right lateral plates of the pterygoid process were 15.99 mm and 16.27 mm, respectively. Also, the mean of maximum heights of the left and right lateral plates were 31.02 mm and 31.01 mm, respectively. The ossified pterygospinous ligament was observed in 51 sides of the skulls (28.0%). Ossification of the pterygospinous ligament was complete in four sides (1.4%). In 47 sides (16.6%), the pterygospinous bridge was incomplete. The ossified pterygoalar ligament was observed in 24 sides of the skulls (8.4%). Ossification was complete in eight sides (2.8%) and incomplete in 16 sides (5.6%). This detailed analysis of the lateral plate of the pterygoid process and related ossification of ligaments can improve the understanding of complex clinical neuralgias associated with this region.


Subject(s)
Adult , Humans , Foramen Ovale , Incidence , Ligaments , Needles , Neuralgia , Skull , Spine , Trigeminal Ganglion
4.
Article in Portuguese | LILACS, BBO | ID: lil-676116

ABSTRACT

Determinadas situações de alteração da normalidade envolvem a simetria óssea dos processos pterigoides como a hemi-hiperplasia que é uma anomalia de desenvolvimento caracterizada pelo crescimento assimétrico de uma ou mais partes do corpo. A relação entre o volume de músculos da mastigação e estruturas ósseas pode ser estudada em doentes com e sem assimetria facial. A importância do conhecimento da anatomia radiográfica para a interpretação de afecções ósseas foi embasada no conhecimento anatômico do padrão de normalidade, principalmente no tocante a estruturas que servem de inserção aos músculos da mastigação. Esta pesquisa tem por objetivo determinar da angulação das lâminas medial e lateral do processo pterigoide do osso esfenoide, por meio da tomografia computadorizada helicoidal. Neste trabalho, em uma amostra que contou com 52 exames de tomografias computadorizadas, foi mensurado o ângulo entre as lâminas medial e lateral do processo pterigoide do osso esfenoide. Foram obtidos ângulos com média de 41,33° do lado D e 41,66° do lado E


The aim in this research is to determine the angle formed by the medial and lateral blades of the pterygoid process of the sphenoid bone through helical CT. Certain situations involve alteration of normal bone symmetry of the pterygoid processes as hemihyperplasia which is a developmental anomaly characterized by asymmetric growth of one or more body parts. The relationship between the volume of masticatoty muscles and bony structures may be studied in patients with and without facial asymmetry. The knowledge of radiographic anatomy for the interpretation of bone infections is based on knowledge of the normal anatomical structures especially regarding those that serve as suport to the masticatoty muscles. In this study, in 52 helical CT exames, the angle between the blades of the medial and lateral pterygoid process of the sphenoid bone were measured. The mean angles found were 41.33° to the right side and 41.66° to the left side


Subject(s)
Tomography, X-Ray Computed , Anatomy , Pterygoid Muscles , Sphenoid Bone
5.
Braz. dent. j ; 18(2): 168-170, 2007. ilus
Article in English | LILACS | ID: lil-466513

ABSTRACT

A rare case of fracture of the coronoid and the pterygoid process caused by firearms is described. A 28-year-old male was hit by a bullet in the face, resulting in restricted mouth opening, difficulty in chewing and pain when opening the mouth. Clinical examination revealed a perforating wound in the right parotid region and a similar wound on the left side of the same region. A CT scan showed comminuted fracture of the left coronoid process and bilateral comminuted fracture of the pterygoid processes. Treatment was conservative, speech therapy was conducted and it was successful. Details of the clinical signs, radiology (3D-CT scan), treatment and follow-up are presented.


Um caso raro de fratura dos processos coronóide e pterigóide por arma de fogo é descrito. Paciente do sexo masculino, 28 anos de idade, foi atingido por projétil de arma de fogo na face, resultando em limitação na abertura da boca, dificuldade para mastigar e dor ao abrir a boca. Exame clínico revelou ferimento perfurante em região parotídea direita e ferida similar do lado esquerdo na mesma região. Tomografia computadorizada (TC) mostrou fratura cominutiva do processo coronóide esquerdo e fratura cominutiva bilateral dos processo pterigóides. O tratamento foi conservador, através de fonoterapia, obtendo-se sucesso. Uma descrição detalhada das características clínicas, radiológicas (TC com reconstrução 3D), tratamento e proservação do caso é apresentada.


Subject(s)
Adult , Humans , Male , Fractures, Comminuted/etiology , Mandibular Fractures/etiology , Skull Fractures/etiology , Sphenoid Bone/injuries , Wounds, Gunshot/complications , Exercise Therapy , Firearms , Follow-Up Studies , Facial Pain/etiology , Musculoskeletal Manipulations , Mastication/physiology , Parotid Gland/injuries , Speech Therapy , Trismus/etiology
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