Andréa Guedes Barreto Gonçales

Computerized Cephalometric Study of the Pharyngeal Airway Space in Patients Submitted to Orthognathic Surgery

IntroductionPharynx is a muscular organ with is sustained by craniofacial bones. It is divided into nasal, oral and hipopharynx, and can be considered as a tube that serves both respiratory and digestive systems. Its anatomical morphology permits that factors facilitate its obstruction, leading to the sleep apnea syndrome. One of the treatment consists of surgical mandibular advancement, increasing pharyngeal dimensions. The aim of this study was evaluate the cephalometric changes in the pharyngeal airway space after orthognathic surgery procedures for correction of mandibular prognathism.Materials and MethodsPre and post-operative cephalometric analysis was performed on 19 patients submitted to mandibular setback by mandibular bilateral sagittal split osteotomy associated with maxillary advancement by Le Fort I osteotomy, using the Dolphin Imaging 10.0 software.ResultsResults did not reveal statistically significant changes in the upper (nasopharyngeal), middle (oropharyngeal) and lower (hypopharyngeal) airway spaces, but showed increase in the nasal pharynx due the maxillary advancement and a lower position of the hyoid bone due the mandibular setback.DiscussionMaxillomandibular orthognathic surgery for correction of mandibular prognathism does not seem to statistically significantly change the pharyngeal airway space, but it increases the maxillary airway.ConclusionIt seems to be important to consider the double jaw surgery in cases of mandibular prognathism, aiming prevention of a possible reduction of whole upper airway.

Finite element analysis of stress distribution in anchor teeth in surgically assisted rapid palatal expansion

The treatment of a transverse maxillary deficiency in skeletally mature individuals should include surgically assisted rapid palatal expansion. This study evaluated the distribution of stresses that affect the expanders anchor teeth using finite element analysis when the osteotomy is varied. Five virtual models were built and the surgically assisted rapid palatal expansion was simulated. Results showed tension on the lingual face of the teeth and alveolar bone, and compression on the buccal side of the alveolar bone. The subtotal Le Fort I osteotomy combined with intermaxillary suture osteotomy seemed to reduce the dissipation of tensions. Therefore, subtotal Le Fort I osteotomy without a step in the zygomaticomaxillary buttress, combined with intermaxillary suture osteotomy and pterygomaxillary disjunction may be the osteotomy of choice to reduce tensions on anchor teeth, which tend to move mesiobuccally (premolar) and distobuccally (molar).

Simultaneous occurrence of dentigerous cyst and residual cyst in the maxilla

The cysts that originate in the remnants of dental lamina or enamel organ are known as odontogenic cysts. They are of great interest to otolaryngologists due to their proximity to the maxillary sinus and adjacent areas.1 Radicular cysts represent 72.5% of all odontogenic cysts, followed by dentigerous cysts (DC) (22.2%), and residual cysts (RC) (4.26%).2 The options for treatment of cystic lesions involve curettage, enucleation, marginal resection,3 and endoscopic surgery, which is a viable alternative, especially in cases of extension to the maxillary sinus.4 A PubMed and EBSCOhost search did not retrieve any studies analyzing the simultaneous occurrence of DC and RC. This article reports a case involving the association a DC and a RC in the upper jaw of an edentulous patient.

Simultaneous occurrence of dentigerous cyst and residual cyst in the maxilla✰✰Please cite this article as: Nogueira AS, Sampieri MBS, Sanches-Gonçales ES, Barreto-Gonçales Andrea Guedes, Soares ECS. Simultaneous occurrence of dentigerous cyst and residual cyst in the maxilla. Braz J Otorhinolaryngol. 2014;80:88–9.

The cysts that originate in the remnants of dental lamina or enamel organ are known as odontogenic cysts. They are of great interest to otolaryngologists due to their proximity to the maxillary sinus and adjacent areas.1 Radicular cysts represent 72.5% of all odontogenic cysts, followed by dentigerous cysts (DC) (22.2%), and residual cysts (RC) (4.26%).2 The options for treatment of cystic lesions involve curettage, enucleation, marginal resection,3 and endoscopic surgery, which is a viable alternative, especially in cases of extension to the maxillary sinus.4 A PubMed and EBSCOhost search did not retrieve any studies analyzing the simultaneous occurrence of DC and RC. This article reports a case involving the association a DC and a RC in the upper jaw of an edentulous patient.

Simultaneous occurrence of dentigerous cyst and residual cyst in the maxilla Ocorrência simultânea de cisto dentígero e cisto residual na maxila

The cysts that originate in the remnants of dental lamina or enamel organ are known as odontogenic cysts. They are of great interest to otolaryngologists due to their proximity to the maxillary sinus and adjacent areas.1 Radicular cysts represent 72.5% of all odontogenic cysts, followed by dentigerous cysts (DC) (22.2%), and residual cysts (RC) (4.26%).2 The options for treatment of cystic lesions involve curettage, enucleation, marginal resection,3 and endoscopic surgery, which is a viable alternative, especially in cases of extension to the maxillary sinus.4 A PubMed and EBSCOhost search did not retrieve any studies analyzing the simultaneous occurrence of DC and RC. This article reports a case involving the association a DC and a RC in the upper jaw of an edentulous patient.

Ocorrência simultânea de cisto dentígero e cisto residual na maxila

The cysts that originate in the remnants of dental lamina or enamel organ are known as odontogenic cysts. They are of great interest to otolaryngologists due to their proximity to the maxillary sinus and adjacent areas.1 Radicular cysts represent 72.5% of all odontogenic cysts, followed by dentigerous cysts (DC) (22.2%), and residual cysts (RC) (4.26%).2 The options for treatment of cystic lesions involve curettage, enucleation, marginal resection,3 and endoscopic surgery, which is a viable alternative, especially in cases of extension to the maxillary sinus.4 A PubMed and EBSCOhost search did not retrieve any studies analyzing the simultaneous occurrence of DC and RC. This article reports a case involving the association a DC and a RC in the upper jaw of an edentulous patient.

Complicações após expansão de maxila cirurgicamente assistida

INTRODUCAO: O tratamento da deficiencia transversal de maxila, em adultos, exige a expansao de maxila cirurgicamente assistida. Diversas tecnicas cirurgicas sao conhecidas para a realizacao desse procedimento, porem estas relacionam-se com complicacoes. OBJETIVO: Avaliar a incidencia de complicacoes associadas ao procedimento de expansao de maxila cirurgicamente assistida. MATERIAL E METODO: Trinta e tres individuos com deficiencia transversal de maxila foram submetidos ao procedimento de expansao pela tecnica da osteotomia Le Fort I subtotal com degrau no pilar zigomatico-maxilar, disjuncao pterigo-maxilar e osteotomia da sutura intermaxilar. Durante os periodos trans e pos-operatorio, as complicacoes relacionadas ao procedimento e as distâncias interdentais foram registradas. RESULTADO: Doze homens e 21 mulheres, com idade media de 24,64 anos, submeteram-se ao procedimento. As mensuracoes das distâncias interdentais evidenciaram aumento das mesmas entre os periodos pre-operatorio e pos-operatorio de 2 meses. As complicacoes prevalentes foram sinusite (6%) e deslocamento associado a inclinacao dental (6%). CONCLUSAO: A expansao de maxila cirurgicamente assistida e um procedimento eficaz e de baixa morbidade para o tratamento da deficiencia transversal de maxila em individuos adultos.