RESUMO
The authors describe their experience with the submental island flap for the primary correction of head and neck deformities following oncologic surgery, over the past 5 years. The use of this flap is reported in 12 patients, with a mean age of 67 years, requiring facial or intraoral reconstruction. A brief review of the key points and some refinements in the operative technique are discussed. The reconstruction of defects with a submental island flap was successful in every patient. Complications encountered were one case of temporary palsy of the marginal mandibular branch of the facial nerve and one case of orocutaneous fistula. All the donor site defects were closed primarily. The submental island flap is an excellent choice for the reconstruction of head and neck defects because of its reliability, versatility, colour and texture match, and relative ease of application.
Assuntos
Carcinoma Adenoide Cístico/cirurgia , Carcinoma Basocelular/cirurgia , Carcinoma de Células Escamosas/cirurgia , Neoplasias Faciais/cirurgia , Neoplasias Palatinas/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Retalhos Cirúrgicos , Idoso , Paralisia Facial/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fístula Bucal/etiologia , Procedimentos de Cirurgia Plástica/efeitos adversos , Fatores de TempoRESUMO
Phase measurements on self-assembled three-dimensional photonic crystals show that the group velocity of light can flip from small positive (slow) to negative (superluminal) values in samples of a few mum size. This phenomenon takes place in a narrow spectral range around the second-order stop band and follows from coupling to weakly dispersive photonic bands associated with multiple Bragg diffraction. The observations are well accounted for by theoretical calculations of the phase delay and of photonic states in the finite-sized systems.
