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1.
Stomatologiia (Mosk) ; 97(1): 40-46, 2018.
Artigo em Russo | MEDLINE | ID: mdl-29465075

RESUMO

The aim of the study was to evaluate the resorbable vs nonresorbable fixation efficiency in bone grafting for unilateral cleft lip and palate (UCLP) patients. Thirty eight UCLP patients aged from 7 to 17 years (mean 11.5±3.1 years) were divided in two groups with different types of cortical graft fixation: group 1 ─ titanium screws (22 patients), group 2 ─ resorbable pins (16 patients). The Bergland and Chelsea scales were used to evaluate the outcomes 8 months after surgery. Additional authors' original scales were introduced: bone volume scale and pyriform rim restoration scale. The Bergland and Chelsea scales have shown good results in groups 1 and 2 in 91 and 81% of cases, satisfactory in 4.5 and 19% of cases, respectively. Upon the bone volume scale good results were achieved in groups 1 and 2 in 64 and in 75% of cases, satisfactory results - in 18 and 19% of cases, respectively. Upon the pyriform rim restoration scale good results achieved in 59 and 88% of cases, respectively. We also took into consideration the influence of age, diagnosis, post-op complications. No statistically significant difference between groups was found, with neither age nor diagnosis showing any influence. Only postsurgical complications and the stability of the orthodontic design seem to be important for good bone formation after alveolar bone grafting.


Assuntos
Enxerto de Osso Alveolar/métodos , Pinos Ortopédicos , Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Adolescente , Autoenxertos/fisiologia , Criança , Feminino , Humanos , Masculino , Complicações Pós-Operatórias/epidemiologia , Regeneração
2.
Artigo em Russo | MEDLINE | ID: mdl-28665386

RESUMO

Basal encephalocele is a rare disease that predominantly occurs in children. Its most common symptoms include nasal liquorrhea, difficulty in nasal breathing, and deformity of the naso-orbital region. MATERIAL AND METHODS: The study group included 19 patients with basal encephalocele, aged 2 months to 18 years. Ten (59%) patients were operated on through a transnasal endoscopic approach; 3 (17.5%) patients were operated on through a transcranial approach; 4 (23.5%) patients were operated on using a combined approach: the patients underwent simultaneous elimination of a cranio-orbital region deformity using the basal transcranial approach as well as hernial sac resection and hernioplasty using the transnasal endoscopic approach. Two children had no surgery due to minimal symptoms and a lack of cerebrospinal fluid leak. RESULTS: Application of the algorithms for diagnosis and treatment of encephalocele, suggested by the authors, enabled making the timely diagnose, defining the optimal surgical tactics, and achieving good treatment results. CONCLUSION: A differentiated approach to the choice of a surgical technique for basal encephalocele, the use of auto-tissues for skull base reconstruction, intraoperative and postoperative lumbar drainage, and simultaneous elimination of deformity of the fronto-naso-orbital region enable avoiding complications and achieving good functional and aesthetic results.


Assuntos
Encefalocele , Cirurgia Endoscópica por Orifício Natural/métodos , Procedimentos Neurocirúrgicos/métodos , Nariz/cirurgia , Procedimentos Cirúrgicos Reconstrutivos/métodos , Adolescente , Algoritmos , Criança , Pré-Escolar , Diagnóstico Diferencial , Encefalocele/congênito , Encefalocele/diagnóstico , Encefalocele/cirurgia , Feminino , Humanos , Lactente , Masculino , Base do Crânio/cirurgia , Resultado do Tratamento
3.
Stomatologiia (Mosk) ; 95(2): 37-47, 2016.
Artigo em Russo | MEDLINE | ID: mdl-27239996

RESUMO

The aim of the study was to apply an effective treatment protocol with low morbidity for children with syndromic and nonsyndromic micrognathia using curvilinear distractors, intraoral approach and early orthodontic treatment. We report 7 patients aged from 3 to 13 years with bilateral mandibular hypoplasia. These patients were characterized by severe malocclusion, esthetic facial deformation and respiratory disorders. In 3 patients mandibular hypoplasia was combined with anterior open bite. The intraoral surgical approach was used in all cases. Good functional and esthetic results were achieved during treatment. The less traumatic intraoral approach, curvilinear distractors, ultrasound callus formation control and early orthodontic treatment assure the good functional and esthetic results in severe cases facilitating the continuinty in complex rehabilitation of the growing child.


Assuntos
Mandíbula/anormalidades , Micrognatismo/reabilitação , Mordida Aberta/reabilitação , Ortodontia Corretiva/instrumentação , Sobremordida/reabilitação , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Mandíbula/cirurgia , Osteotomia Mandibular/métodos , Micrognatismo/complicações , Micrognatismo/cirurgia , Mordida Aberta/complicações , Mordida Aberta/cirurgia , Sobremordida/complicações , Sobremordida/cirurgia
5.
Phys Rev Lett ; 109(18): 187402, 2012 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-23215326

RESUMO

Under optical excitation, coupled quantum wells are known to reveal fascinating features in the photoluminescence pattern originating from dipole orientated indirect excitons. The appearance of an external ring has been attributed to macroscopic charge separation in the quantum well plane. We present a classical model of nonlinear diffusion to account for the observed fragmentation of the external ring into a periodic array of islands. The model incorporates the Coulomb interactions between electrons, holes, and indirect excitons. At low temperatures, these interactions lead to pattern formation similar to the experimentally observed ring fragmentation. The fragmentation is found to persist to temperatures above the quantum degeneracy temperature of indirect excitons.

6.
Vestn Khir Im I I Grek ; 171(1): 53-6, 2012.
Artigo em Russo | MEDLINE | ID: mdl-22645917

RESUMO

Two groups of patients in whom two-stage treatment of cholecystocholedocholithiasis was performed with different succession of using endoscopic papillosphincterotomy (EPST) and laparoscopic cholecystectomy (LCE) were compared. In 59 patients (1st group) EPST was used as the first stage, in 67 patients (2nd group) LCE and drainage of choledochus preceded the endoscopic intervention. The effectiveness of EPST was 93.3 and 95.5% correspondingly in the first and second groups. There were no considerable differences in the frequency of complications, period of treatment at the hospital in the two groups. Lythextraction was obtained considerably more often at the first attempt in the second group of patients (79.1% versus 59.9%, p < 0.05). Due to inefficiency of EPST in three cases in the second group of patients reoperations were required. Thus, EPST should be performed before LCE for the rationally planned further treatment in case of its inefficiency.


Assuntos
Colecistectomia Laparoscópica/métodos , Colecistolitíase/cirurgia , Coledocolitíase/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Esfinterotomia Endoscópica/métodos , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
8.
Phys Rev Lett ; 106(19): 196806, 2011 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-21668190

RESUMO

We report on the study of indirect excitons in moving lattices-conveyers created by a set of ac voltages applied to the electrodes on the sample surface. The wavelength of this moving lattice is set by the electrode periodicity, the amplitude is controlled by the applied voltage, and the velocity is controlled by the ac frequency. We found the dynamical localization-delocalization transition for excitons in the conveyers and determined its dependence on exciton density and conveyer amplitude and velocity.

12.
Int J Oral Maxillofac Surg ; 39(4): 397-401, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20005074

RESUMO

Two Russian brothers presented with recurring benign facial bone tumors and progressive limb bowing. The association of fibro-osseous jawbone lesions and long-bone bowing with cortical thickening suggested the diagnosis of gnathodiaphyseal dysplasia, in the absence of arguments in favor of fibrous dysplasia. Gnathodiaphyseal dysplasia is a rare autonomic dominant syndrome due to a mutation of the TMEM16E gene. The extreme and recurring phenotype of these two patients illustrates the variable expressivity of this disease. Differential diagnosis with other benign facial bone tumors is discussed.


Assuntos
Ossos do Braço/patologia , Doenças do Desenvolvimento Ósseo/genética , Ossos Faciais/patologia , Ossos da Perna/patologia , Adolescente , Cementoma/diagnóstico , Criança , Diagnóstico Diferencial , Diáfises/patologia , Fibroma Ossificante/diagnóstico , Displasia Fibrosa Poliostótica/diagnóstico , Seguimentos , Humanos , Masculino , Proteínas de Membrana/genética , Mutação/genética , Tumores Odontogênicos/diagnóstico , Doenças Raras , Recidiva
13.
Zh Vopr Neirokhir Im N N Burdenko ; (2): 35-42; discussion 42, 2009.
Artigo em Russo | MEDLINE | ID: mdl-19569547

RESUMO

Le Fort III midfacial distraction using internal and external devices is a generally accepted procedure for midfacial retrusion in patients with craniosynostoses. Many novel techniques for correction of cranial deformities in craniosynostoses are being introduced today. The authors described 14 consecutive cases of Le Fort III midfacial distraction using internal and external distraction devices. The paper discusses advantages and limitations of these methods.


Assuntos
Disostose Craniofacial/cirurgia , Craniossinostoses/cirurgia , Osteogênese por Distração/métodos , Osteotomia de Le Fort/métodos , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Humanos , Fixadores Internos , Masculino , Osteogênese por Distração/instrumentação , Osteotomia de Le Fort/instrumentação , Tomografia Computadorizada Espiral , Resultado do Tratamento , Adulto Jovem
14.
Nano Lett ; 9(5): 2094-8, 2009 May.
Artigo em Inglês | MEDLINE | ID: mdl-19382780

RESUMO

We report on the study of indirect excitons in elevated traps. The transition from a normal to elevated trap results in the appearance of narrow lines in the emission spectrum. The density, temperature, and voltage dependences indicate that these lines correspond to the emission of individual states of indirect excitons in a disorder potential in the elevated trap.

15.
Int J Oral Maxillofac Surg ; 38(3): 218-23, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19038533

RESUMO

The Central Institute for Stomatology and Maxillo-facial Surgery in Moscow is one the main centers for the treatment of pediatric head and neck tumors in the territory of the former Soviet Union. A series of 33 patients presenting with cherubism (24 children and 9 of their parents) is presented. The authors discuss the atypical clinical presentations, the relevant associated anomalies and the different treatment strategies. They report the first case of cherubism associated with gingival hypertrophy without neurological signs.


Assuntos
Querubismo/patologia , Fibromatose Gengival/complicações , Hipertrofia Gengival/complicações , Mandíbula/anormalidades , Anormalidades Dentárias/complicações , Querubismo/complicações , Querubismo/genética , Querubismo/terapia , Criança , Pré-Escolar , Feminino , Fibromatose Gengival/patologia , Hipertrofia Gengival/patologia , Humanos , Masculino , Mandíbula/patologia , Maxila/anormalidades , Maxila/patologia , Pais , Linhagem , Estudos Retrospectivos , Federação Russa , Índice de Gravidade de Doença , Articulação Temporomandibular/anormalidades , Articulação Temporomandibular/patologia , Anormalidades Dentárias/patologia
17.
Stomatologiia (Mosk) ; 87(3): 55-60, 2008.
Artigo em Russo | MEDLINE | ID: mdl-18577925

RESUMO

Congenital cleft of upper lip and palate (CCULP) is one of the most widely spread and complicated developmental malformation of maxillofacial region, its frequency makes up for 16.4% of the total number of inherited defects. Ultrasound study (USS) let receive clinically significant information about anatomical structures peculiarities of upper lip, alveolar process and palate in patients with crest CCULP that could be important for surgical and prosthetic treatment planning and also significant for assessment of immediate and postponed treatment results. Verification of the received during surgical interventions and orthodontic manipulations data showed high diagnostic reliability of the USS results.


Assuntos
Fenda Labial/diagnóstico por imagem , Fissura Palatina/diagnóstico por imagem , Adolescente , Criança , Pré-Escolar , Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Cuidados Pós-Operatórios , Cuidados Pré-Operatórios , Ultrassonografia
19.
J Phys Condens Matter ; 19(29): 295215, 2007 Jul 25.
Artigo em Inglês | MEDLINE | ID: mdl-21483067

RESUMO

In order to explain the photoluminescence (PL) of indirect excitons collected from localized spots in experiments with a defocused laser excitation of coupled quantum wells (QWs), we model the in-plane carrier transport and charge distribution with a set of drift-diffusion, Poisson and thermalization equations. The quantum statistical corrections are included in our description via a generalized Einstein relationship and quantum mass action law. The PL spots are attributed to transverse current filaments crossing the structure and injecting electrons in the coupled QWs. The accumulated electron charge forms an anti-trap for indirect excitons. Our model quantitatively reproduces the whole set of the relevant experimental data.

20.
Phys Rev Lett ; 96(22): 227402, 2006 Jun 09.
Artigo em Inglês | MEDLINE | ID: mdl-16803343

RESUMO

Optical trapping and manipulation of neutral particles has led to a variety of experiments from stretching DNA-molecules to trapping and cooling of neutral atoms. An exciting recent outgrowth of the technique is an experimental implementation of atom Bose-Einstein condensation. In this Letter, we propose and demonstrate laser-induced trapping for a new system--a gas of excitons in quantum well structures. We report on the trapping of a highly degenerate Bose gas of excitons in laser-induced traps.


Assuntos
Biofísica/métodos , Lasers , Modelos Químicos , Teoria Quântica , DNA/química
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