Incidence of inferior alveolar nerve sensory deficit and intra-operative nerve encounters after advancement of retrognathic mandible – A cross-sectional survey study

Aims and Objectives: The aim of the current cross?sectional study was to conduct a survey among the oral and maxillofacial surgeons of South India regarding their experiences of incidence of inferior alveolar nerve (IAN) neurosensory deficit after bilateral sagittal split osteotomy (BSSO) for correction of mandibular retrognathism and to assess the intra?operative nerve encounters and its effect on the inferior alveolar neurosensory deficit (NSD), 6 months post?operatively. Materials and Methods: A self?administered questionnaire (SAQ) was prepared using Google Forms (Google Inc.) and sent to the prospective participants through various social media outlets such as Facebook, WhatsApp groups etc., of the maxillofacial surgery specialty for a period of 3 months. SAQ from surgeons with more than 5 years of experience in orthognathic surgery were included. Results: The incidence of NSD post?BSSO advancement surgery from 859 cases after 6 months was 15.1% (130). After splitting the mandible, the IAN was seen in the proximal fragment in 472 sites and needed dissection. The nerve was transected and neurorrhaphy was carried out in 26 sites. A Chi?square test was used to analyse the qualitative variables. The IAN was not visible post?osteotomy in 140 sites and in the distal fragment in 1080 sites. These groups had decreased incidence of NSD. The NSD was significantly higher in cases where the nerve was transected and sutured, P value <0.001 as compared with the other nerve status, followed by the nerve in the proximal fragment needing dissection. Conclusion: The IAN status intra?operatively can be assumed to have a significant role in persisting NSD

Effects of hand-transmitted vibration on upper limbs of workers: A meta-analysis / 环境与职业医学

Background Hand arm vibration disease (HAVD) is one of the legal occupational diseases in China, and its pathogenesis is not clear. Operators exposed to electric vibration tools for a long time have an increased risk of HAVD. Objective To conduct a systematic evaluation of the effects of vibration operations on workers' upper limb nerves, blood vessels, and muscles. Methods Relevant studies on the effects of hand-transmitted vibration on HAVD were searched and collected from the China Knowledge Infrastructure, Wanfang, and PubMed databases, and the literature was published from January 1974 to April 2021. The quality of cohort and case-control studies was assessed by the Newcastle-Ottawa Scale (NOS), and the quality of cross-sectional studies was by the evaluation criteria recommended by the Agency for Healthcare Quality and Research (AHRQ). Statistical analyses of outcome indicators (OR) in the included literature were performed using RevMan 5.4.1 software, effect sizes in the literature on vibration-induced white finger and neurosensory impairment were combined using a random-effect model, those that included carpal tunnel syndrome were combined using a fixed-effect model, and subgroup and publication bias analyses were also performed. To explore sources of study heterogeneity, meta-regression was performed using Stata 16.0 software, and sensitivity analyses were performed on the included literature. Results A total of 716 papers were retrieved from the databases, and 18 articles were retrieved by manual searching. A total of 34 papers were included after excluding those not meeting the criteria. Of the papers, 11004, 7270, and 1722 subjects related to vibration-induced white finger, neurosensory impairment, and carpal tunnel syndrome, respectively. The results of meta-analysis showed that compared with the control group, the combined ORs of hand-transmitted vibration exposure were 4.25 (95%CI: 2.72−6.65) for vibration-induced white finger, 4.03 (95%CI: 2.46−6.61) for neurosensory impairment, and 2.44 (95%CI: 1.61−3.71) for carpal tunnel syndrome. Heterogeneity was identified in the original studies related to vibration-induced white finger (I2=81%, P < 0.001) and neurosensory impairment (I2=90%, P < 0.001), except carpal tunnel syndrome (I2=23%, P < 0.001). The results of sensitivity analysis showed that the combined effect sizes (ORs) were stable and reliable. The results of meta-regression showed that the factors contributing to high heterogeneity of combined vibration-induced white finger and neurosensory impairment were time of publication (t=−2.10, P=0.049) and working age (t=−2.40, P=0.032), respectively. Conclusion Hand-transmitted vibration is a risk factor for vibration-induced white finger, neurosensory impairment, and carpal tunnel syndrome in operators.

Desórdenes neurosensoriales posextracción de terceros molares inferiores retenidos / Neurosensory disorders after removal of retained lower third molars

Introducción: Los desórdenes neurosensoriales aparecen vinculados a la exéresis de terceros molares inferiores; su mal diagnóstico y tratamiento acarrean una larga permanencia de los mismos. Objetivo: Caracterizar desde el punto de vista clínico y terapéutico los desórdenes neurosensoriales asociados a la extracción quirúrgica de terceros molares inferiores retenidos. Material y Método: Se realizó un estudio cuasi-experimental en 136 pacientes sometidos a exéresis quirúrgica de terceros molares inferiores retenidos con criterios específicos de inclusión en la Facultad de Estomatología de La Habana, período 2016-2017. Los pacientes fueron intervenidos y examinados a los 3 y 10 días tras la intervención para identificar desórdenes neurosensoriales. Se emplearon 3 test diagnósticos para definir el nivel de función neurológica; se utilizó escala VAS para evaluar el nivel de sensibilidad del paciente, y el interrogatorio estandarizado para categorizar los tipos de desórdenes sensoriales. Se registraron las variables: edad, sexo, clase de retención, modificación de técnica quirúrgica y hallazgos neurosensoriales. Resultados: Presentó desórdenes neurosensoriales 3,5 por ciento de los pacientes; 2,1 por ciento del sexo femenino. La clase III, posición C, mesioangular fue la retención más vinculada con 2,1 por ciento. El nervio dentario inferior fue el más involucrado (2,1 por ciento) y la parestesia fue el hallazgo más frecuente (60 por ciento). El 60 por ciento de los desórdenes involucionaron a los 180 días. Conclusiones: Los desórdenes neurosensoriales vinculados a la exéresis de terceros molares inferiores registran una baja frecuencia en la población estudiada, predomina en el nervio dentario inferior, en retenciones clase III, posición B, mesioangular y se asocia más a técnicas con ostectomías y odontosecciones. La disestesia es la entidad más refractaria al tratamiento(AU)

Introduction: Neurosensory disorders are linked to the removal of retained lower third molars; its misdiagnosis and poor treatment can lead to their long persistence. Objective: To characterize neurosensory disorders associated with the removal of retained lower third molars from the clinical and therapeutic point of view. Material and Method: A quasi-experimental study was conducted in 136 patients with specific inclusion criteria who underwent surgical removal of retained lower third molars in the Dental Faculty of the University of Havana, between 2016-2017. The patients were operated on and examined 3 and 10 days after surgery to identify the presence of neurosensory disorders. Three types of diagnostic tests were used to define the level of neurological function. VAS Scale was used to evaluate the sensitivity level in the patient, and the standardized interview was made to categorize the type of neurosensory disorders. Variables such as age, sex, kind of retention, modification of surgical techniques, and neurosensory findings were recorded. Results: 3,5 percent of patients had neurosensory disorders, 2,1 percent were female. Class III, position C, mesioangular was the most linked retention (2,1 percent). The inferior dental nerve was the most involved (2,1 percent), and paresthesia was the most frequent finding (60 percent). The 60 percent of disorders recovered their normal function after 180 days. Conclusions: The appearance of neurosensory disorders linked to the removal of lower third molars presented a low frequency in the population studied, predominating in the inferior dental nerve, in class III retentions, Position B, mesioangular position; and they are more linked to the surgical techniques of ostectomies and odontosections. Dysesthesia is the most refractory to treatment(AU)

Torpedo maculopathy with multifocal central serous chorioretinopathy: A rare case report

We present a very rare case of torpedo maculopathy (TM) with multifocal central serous chorioretinopathy. A 26-year-old male presented with painless loss of vision in the right eye of 2 months duration. Clinical examination showed a torpedo-shaped lesion temporal to fovea and subretinal fluid in foveal center. Fluorescein angiography showed multifocal leaks. Optical coherence tomography showed an optically clear space/neurosensory detachment at the site of lesion. Patient underwent focal laser to the leaks. TM is a rare congenital disorder detected accidentally during routine fundus examination. It is usually unilateral and does not affect vision.

Técnicas de transposição/lateralização do nervo alveolar inferior ­ uma revisão da literatura sobre o déficit neurossensorial e a taxa de sucesso dos implantes dentários / Transposition/lateralization techniques for the inferior alveolar nerve ­ a literature review on the neurosensorial and dental implant success rates

Objetivo: comparar as técnicas de lateralização (LNAI) e transposição do nervo alveolar inferior (TNAI) com a taxa de disfunção neurossensorial, bem como a taxa de sucesso dos implantes dentários. Material e métodos: uma pesquisa foi realizada no período de 1987 a 2016, no banco de dados Medline/PubMed, com as palavras-chave "implantes dentários", "nervo alveolar inferior", "lateralização", "transposição", "neurossensorial" e "taxa de sucesso". Foram incluídos artigos retrospectivos e prospectivos em seres humanos, e que apresentassem relatos de disfunção neurossensorial e taxa de sucesso dos implantes dentários na região posterior da mandíbula, após procedimentos de lateralização ou transposição do nervo alveolar. Resultados: dos 142 artigos encontrados na primeira fase de seleção, apenas 26 foram incluídos na técnica LNAI, com um total de 524 procedimentos, sendo 228 na técnica de TNAI e 296 na LNAI, que foram incluídos neste estudo. O número de implantes instalados pela técnica de TNAI foi de 625, e pela técnica de LNAI foi de 401. As técnicas de TNAI apresentaram um índice inicial maior de disfunção neurossensorial, quando comparadas à técnica de LNAI. A taxa de sucesso dos implantes para a té cnica de TNAI ficou entre 80% e 100%, e para a té cnica de LNAI fi cou entre 90,5% e 100%. Conclusão: a LNAI vem sendo uma boa indicação para a reabilitação de mandíbulas atróficas verticalmente, e sua execução com o piezo diminui o risco de distúrbio sensorial. As altas taxas de sucesso dos implantes podem ser atribuídas à possibilidade da instalação de implantes longos com ancoragem bicortical, favorecendo a estabilidade primária e a biomecânica.

Objective: to compare lateralization techniques (LNAI) and transposition of the inferior alveolar nerve (TNAI) with the rate of sensorineural dysfunction, as well as the success rate of dental implants. Material and methods: a survey was carried out between 1987 and 2016 in the Medline/PubMed database, with the key words "dental implants", "inferior alveolar nerve", "lateralization", "transposition", "neurosensorial", "success rate". Retrospective and prospective articles in humans that presented reports of sensorineural dysfunction and success rate of dental implants in the posterior region of the mandible after procedures of lateralization or transposition of the alveolar nerve were included. Results: in the fi rst phase of the selection, 142 articles were retrieved, but only 26 articles on LNAI, with a total of 524 procedures, 228 on TNAI technique and 296 the LNAI, were included in the study. The number of implants installed by the TNAI technique was 625 and by the LNAI 401. The TNAI present a higher initial index of sensorineural dysfunction than the LNAI and the success rate of the implants was for the TNAI between 80% to 100%, and for the LNAI between 90.5% and 100%. Conclusion: LNAI has been a good indication for the rehabilitation of atrophic mandibles vertically and its execution with piezo reduces the risk of sensory disturbance. The high success rates of implants can be attributed to the possibility of installing long implants with bicortical anchoring favoring primary stability and biomechanics.

Recovery of inferior alveolar nerve injury after bilateral sagittal split ramus osteotomy (BSSRO): a retrospective study / 대한악안면성형재건외과학회지

BACKGROUND: Bilateral sagittal split ramus osteotomy (BSSRO) is the most widely used mandibular surgical technique in orthognathic surgery and is easy to relocate the distal segments, accelerating bone repair by the large surface of bone contact. However, it can cause neurosensory dysfunction (NSD) or sensory loss by injury of the inferior alveolar nerve. The purpose of the present study was to evaluate NSD after BSSRO and modifiers at NSD recovery. METHODS: In this study, NSD characteristics after BSSRO from 2009 to 2014 at the Kyung Hee University Dental Hospital were evaluated. The pattern of sensory recovery over time was also evaluated based on factors such as field of sensory dysfunction, surgical procedure, presence of pre-operative facial asymmetry, and postoperative medications. RESULTS: Most of the patients had shown NSD immediately after orthognathic surgery. Among the 1192 sides of 596 patients, NSD was observed in 953 sides and 544 patients. Sexual predilection was shown in males (p value = 0.0062). In the asymmetric group of 132 patients, NSD was observed in 128 patients (96.97%). In the symmetric group of 464 patients, NSD was observed in 416 patients (89.45%); on the other hand, NSD was observed significantly higher in the asymmetric group (p = 0.025). NSD-associated factors were analyzed, and vitamin B12 may be beneficial for NSD recovery. CONCLUSIONS: There was a difference between the symmetric group and the asymmetric group in NSD recovery. Vitamin B12 can be regarded as an effective method to nerve recovery. However, a further prospective study is needed.

Therapeutic Observation of Deep Needling the Points around the Ear plus Scalp Acupuncture for Neurosensory Tinnitus / 上海针灸杂志

Objective To observe the clinical efficacy of deep needling the points around the ear plus scalp acupuncture in treating neurosensory tinnitus.Method Totally 210 patients with neurosensory tinnitus were randomized into a treatment group and a control group, 105 cases in each group. The treatment group was intervened by deep needling the points around the ear plus scalp acupuncture, while the control group was by conventional acupuncture. The clinical efficacies were compared between the two groups after 3 treatment courses.Result The total effective rate was 82.9% in the treatment group versus 63.8% in the control group, and the difference was statistically significant (P<0.05).Conclusion Deep needling the points around the ear plus scalp acupuncture is an effective method in treating neurosensory tinnitus.

Displasia de Mondini asociada a meningitis bacteriana recurrente, correlación clínico-imagenológica / Mondini dysplasia associated to recurrent bacterial meningitis-a clinical and imaging correlation

Se describe la displasia de Mondini asociada a pérdida auditiva y meningitis bacteriana recurrente. La malformación de Mondini representa el 30 por ciento de las anomalías congénitas del oído interno, puede ser unilateral o bilateral, y su principal característica consiste en el desarrollo coclear incompleto, causante de grados variables de hipoacusia neurosensorial. Se considera que la ocurrencia de esta malformación se produce por disrupción del desarrollo embrionario durante la séptima semana de gestación, en la cual se detiene el desarrollo coclear. Se presenta el caso de una niña de 12 años, atendida en los Servicios de Pediatría y Otorrinolaringología del Hospital Pediátrico Universitario William Soler, por presentar 3 infecciones meningoencefálicas, en las cuales se aisló Streptococcus pneumoniae serotipo 19F, y se constató hipoacusia neurosensorial severa en el oído izquierdo. La tomografía axial computarizada de alta resolución del oído (cortes axiales y coronales), evidenció la malformación coclear y vestibular, con presencia de tejido en el oído medio que se comunicaba directamente con el oído interno del lado izquierdo a nivel de la ventana oval. Se destaca la importancia de la sospecha clínica de displasia de Mondini, y el impacto científico de la tomografía computarizada del hueso temporal, para el diagnóstico precoz de fístula congénita en el oído interno asociada a meningitis bacteriana recurrente

Mondini dysplasia associated to hearing loss and recurrent bacterial meningitis was described in this paper. Mondini malformation accounts for 30 percent of congenital anomalies in the inner ear, either unilateral or bilateral, and its main characteristic is the incomplete cochlear development causing various grades of neurosensory hypoacusis. It is considered that the occurrence of this malformation results from the disruption of the embryonal development on the 7th week of gestation when the cochlear development ceases. This is the case of 12 years-old girl who was attended to at the pediatric and otorhinolaryngology service of William Soler" university pediatric hospital because she presented with three meningoencephalic infections from which Streptococcus pneumonia serotype 19F was isolated. It was also confirmed that she suffered severe neurosensory hypoacusis in her left ear. High-resolution computerized axial tomography of the ear (axial and coronal planes) evinced the cochlear and vestibular malformation, with tissue of the middle ear communicating directly with the inner ear of the left size at the oval window. This paper underlined the importance of the clinical suspicion of Mondini disease, and the scientific impact of the computerized axial tomography of the temporal bone in order to early diagnose the congenital fistula in the inner ear associated to recurrent bacterial meningitis

Motor development of Brazilian breastfeeding infants in socially unfavorable condition of life

The early years of life are of essential importance for child development and growth. The child's development in a social vulnerability and unfavorable life condition can be injured, and that early detection of disorders is fundamental for healthy development. PURPOSE: To assessment the Alberta Infant Motor Scale as an assessment tool to identify early of disorders in infants until 18 months. METHODS: This is an observational, cross-sectional study undertaken in "educational program for the growth and development promotion" at the health unit administered by reference hospital of Health Public System, in Paraisópolis community, São Paulo. The sample (n=71) was composed for infants less than 18 months of age, eutrophic, low biological risk at birth; singleton, full-term births, weight at birth between 2,000g e" and d" 4,500g and no associated congenital neurological, cardiac or orthopedic pathologies at the clinical exam. RESULTS: This study presented the greatest prevalence of delay motor neuromotor when compared with the AIMS reference population. First, 8.5% of the breastfeeding infants are classified as being mdA and 7.0% are classified as dmS and secondly that, although the category mdT contains 84.5% of the children, the median of the z-score has shifted from the central point of the normal standardized distribution, only 33.7% of the children, i.e., 24 in 71, being equal to or above Z=0 (p<0.05). CONCLUSION: The use of AIMS was efficient, practice, low cost and quick applies. Plus a quick view of motor milestone presents by infant. Features that became possible take decision by health team...

Os primeiros anos de vida são de importância essencial para o desenvolvimento infantil. O desenvolvimento neurosensoriomotor de crianças, vivendo em condição de pobreza, pode ser prejudicado, sendo a detecção precoce de anormalidades essencial para um desenvolvimento saudável. OBJETIVO: Avaliar o uso da AIMS como instrumento de avaliação para detecção precoce de anormalidades. MÉTODO: Trata-se de um estudo descritivo, do tipo transversal, realizado com lactentes brasileiros matriculados no "Programa educativo de promoção do crescimento e desenvolvimento", do ambulatório de uma unidade de saúde gerenciada por um Hospital de referência do Sistema Público de Saúde, na Comunidade de Paraisópolis, São Paulo. A amostra (n = 71) foi composta por lactentes menores de 18 meses, eutróficos, de baixo risco biológico ao nascimento, nascidos de parto único, termo, peso ao nascer entre 2.000g e 4.500g, sem associação com patologias congênitas neurológicas, cardíacas ou ortopédicas no exame clinico. RESULTADOS: Este estudo apresenta prevalência de atraso motor quando comparado com a população de referencia da AIMS. Primeiro, 8,5% dos lactentes foram classificados como mdA e 7% como dmS, além da categoria mdT conter 84,5% dos lactentes, a media do escore Z tem modificado o ponto central da distribuição padronizada, apenas 33,7% do grupo, isto e, 24 em 71, estão igual ou acima do Z = 0 (p < 0.05). CONCLUSÃO: A utilização da AIMS neste estudo foi eficiente na avaliação do desenvolvimento motor, prática, de baixo custo e rápida aplicação. Forneceu rápida visualização da posição do lactente. Característica que permite tomada de decisões oportunas pelos profissionais que integram as equipes de saúde...

Effect of bevacizumab (Avastin™) on mitochondrial function of in vitro retinal pigment epithelial, neurosensory retinal and microvascular endothelial cells.

Purpose: To evaluate the effect of bevacizumab on the mitochondrial function of human retinal pigment epithelial (ARPE‑19), rat neurosensory retinal (R28) and human microvascular endothelial (HMVEC) cells in culture. Materials and Methods: ARPE‑19 and R28 cells were treated with 0.125, 0.25, 0.50 and 1 mg/ml of bevacizumab. The HMVEC cultures were treated with 0.125, 0.25, 0.50 and 1 mg/ml of bevacizumab or 1 mg/ml of immunoglobulin G (control). Mitochondrial function assessed by mitochondrial dehydrogenase activity (MDA) was determined using the WST‑1 assay. Results: Bevacizumab doses of 0.125 to 1 mg/ml for 5 days did not significantly affect the MDA of ARPE‑19 cells. Bevacizumab treatment at 0.125 and 0.25 mg/ml (clinical dose) did not significantly affect the MDA of R28 cells; however, 0.50 and 1 mg/ml doses significantly reduced the R28 cell mitochondrial function. All doses of bevacizumab significantly reduced the MDA of proliferating and non‑proliferating HMVEC. Conclusion: Bevacizumab exposure for 5 days was safe at clinical doses in both ARPE‑19 and R28 retinal neurosensory cells in culture. By contrast, bevacizumab exposure at all doses show a significant dose‑dependent decrease in mitochondrial activity in both the proliferating and non‑proliferating HMVEC in vitro. This suggests a selective action of bevacizumab on endothelial cells at clinical doses.

Hipoacusia neurosensorial en un síndrome de Noonan y secuencia Poland / Neurosensory hypoacusis in a Noonan's syndrome and Poland's sequence

Se calcula que el 50 por ciento de los casos de sordera profunda en la infancia puede ser de origen genético. Se presenta el caso de un niño de 9 años, atendido en los Servicios de Otorrinolaringología y Genética del Hospital Pediátrico Docente William Soler, por presentar hipoacusia neurosensorial grave unilateral y displasia congénita de Mondini en el oído izquierdo, del lado contrario a la hipoplasia del músculo pectoral mayor, lo cual coincide con un síndrome de Noonan y secuencia de Poland, que resulta de especial interés. Se constató la hipoacusia con audiometría tonal y potencial evocado auditivo de tallo cerebral. En la tomografía del oído se observó una hipoplasia coclear con agenesia de la espira apical. Se destacan las manifestaciones clínicas y la importancia del estudio otológico e imaginólogico en el diagnóstico de la pérdida auditiva

It is estimated that the 50 percent of cases of deep deafness during childhood may be or genetic origin. This is the case of a child aged 9 seen in Otorhinolaryngology and Genetics Services of the Wiliam Soler Teaching Children Hospital due to a unilateral severe neurosensory hypoacusis and Mondini's congenital dysplasia in left ear contralateral to the major pectoral muscle hypoplasia, an interesting situation. Hypoacusis was confirmed using tone audiometry and auditory evoked potential of brain stem. Ear tomography demonstrated a cochlear hypoplasia with agenesis of apical spiral. The clinical manifestations and the significance of the ontological and imaging study in diagnosis of auditory loss are emphasized

Emissões otoacústicas transientes como método complemantar no topodiagnóstico das perdas auditivas neurossensoriais / Passing otoacustic emissions as a complementar method in the topodiagnosis of the neurosensories hearing loss

Introdução: Não faz parte da rotina clínica avaliar as emissões otoacústicas (EOAETs) em pacientes com perda auditiva neurossensorial. Entretanto obter-se-ia informações valiosas em relação ao topodiagnóstico. Objetivo: Identificar sinais de alteração retrococlear em indivíduos com diagnóstico de disacusia neurossensorial. Método: Estudo prospectivo, quantitativo, observacional e transversal. Foram analisados 34 prontuários de usuários do Serviço de Atendimento Fonoaudiológico. Foram incluídos no estudo indivíduos com perda auditiva neurossensorial de grau moderado a profundo. Realizou-se avaliação de Emissões Otoacústicas Transientes (EOAETs) em todos os indivíduos da amostra. Os que não apresentaram EOAETs tiveram a condição das orelhas média e externa avaliadas por meio de meatoscopia e timpanometria para eliminar orelhas com sinais de alteração condutiva. Resultados: Após aplicados os critérios de exclusão, restaram 13 indivíduos, totalizando 26 orelhas: quatro com perda auditiva de grau moderado (15%), quatro com grau moderadamente severo (15%), duas com grau severo (8%), 15 com grau profundo (58%) e uma com anacusia (4%). As curvas timpanométricas encontradas foram 22 (85%) Tipo A e quatro (15%) Tipo C. Verificou-se presença de EOAETs em apenas duas orelhas (8%) de um mesmo sujeito. Conclusão: Verificou-se predomínio de ausência de EOAETs em sujeitos com perda auditiva neurossensorial de grau moderado a profundo. Em um único caso as EOAETs foram registradas, o que sugere alteração retrococlear. Levantando a suspeita de alterações retrococleares.

Introduction: To evaluate the otoacustic emissions (EOAETs) in patients with neurosensory hearing loss do not belong to the clinical routine. However it would obtain valuables information concerning the topodiagnosis. Objective: To identify signs of retro cochlear alteration in individuals with neurosensory dysacusis diagnosis. Method: A transversal, observational, quantitative and, prospective study. Were analyzed 34 patients' records of users of the Speech Therapy Attendance Service. In the study were included individuals with neurosensory hearing loss of moderate to deep degree. An evaluation of Passing Otoacustic Emissions (EOAETs) was performed in all the individuals of the sample. Those that do not presented EOAETs had the external and middle ear' condition evaluates through meatoscopy and tympanometry to eliminate ears with sings of conductive alteration. Results: Before that the exclusion criteria were applied, they have remained 13 individuals, totalizing 26 ears: four with hearing loss of moderate degree (15%), four with moderately severe degree (15%), two with severe degree (8%), 15 with deep degree (58%) and, one with deafness (4%). The tympanometric curves found were 22 (85%) Type A and, four (15%) Type C. It was verified the presence of EOAETs in only two ears (8%) of a same individual. Conclusion: It was verified the predominance of the EOAETs absence in individuals with neurosensory hearing loss of moderate to deep degree. In one case the EOAETs were registered, that suggest retrocochlear alteration. Raising suspicion of retrocochlear alterations.

Processamento auditivo temporal em idosos / Temporal auditory processing in elders

Introdução: No processo de envelhecimento todas as estruturas do organismo se modificam, gerando intercorrências na qualidade da audição e da compreensão. A perda auditiva que ocorre em decorrência deste processo ocasiona uma redução da função comunicativa, causando, também, um afastamento do convívio social. Objetivo: Comparar o desempenho do processamento auditivo temporal entre indivíduos idosos com e sem perda auditiva. Método: O presente estudo se caracteriza por ser um estudo de campo, transversal, prospectivo e de caráter diagnóstico. Foram analisados 21 idosos (16 mulheres e 5 homens, com idades entre 60 a 81 anos) divididos em dois grupos, um grupo "sem perda auditiva" (n=13) com limiares auditivos normais ou perda auditiva restrita a frequências isoladas e um grupo "com perda auditiva" (n= 8) com perda auditiva neurossensorial de grau variável entre leve a moderadamente severo. Ambos os grupos realizaram os testes de frequência (PPS) e duração (DPS), para avaliar a habilidade de sequenciamento temporal, e o teste Randon Gap Detection Test (RGDT), para avaliar a habilidade de resolução temporal. Resultados: Não houve diferença estatisticamente significativa entre os grupos, avaliados pelos testes DPS e RGDT. A habilidade de sequenciamento temporal foi significativamente maior no grupo sem perda auditiva, quando avaliada pelo teste PPS na condição "murmurando". Este resultado apresentou uma crescente significância em paralelo com o aumento da faixa etária. Conclusão: Não houve diferença no processamento auditivo temporal na comparação entre os grupos.

Introduction: In the trial of aging all the structures of the organism are modified, generating intercurrences in the quality of the hearing and of the comprehension. The hearing loss that occurs in consequence of this trial occasion a reduction of the communicative function, causing, also, a distance of the social relationship. Objective: Comparing the performance of the temporal auditory processing between elderly individuals with and without hearing loss. Method: The present study is characterized for to be a prospective, transversal and of diagnosis character work. They were analyzed 21 elders (16 women and 5 men, with ages between 60 to 81 years) divided in two groups, a group "without hearing loss"; (n = 13) with normal auditive thresholds or restricted hearing loss to the isolated frequencies and a group "with hearing loss" (n = 8) with neurosensory hearing loss of variable degree between light to moderately severe. Both the groups performed the tests of frequency (PPS) and duration (DPS), for evaluate the ability of temporal sequencing, and the test Randon Gap Detection Test (RGDT), for evaluate the temporal resolution ability. Results: It had not difference statistically significant between the groups, evaluated by the tests DPS and RGDT. The ability of temporal sequencing was significantly major in the group without hearing loss, when evaluated by the test PPS in the condition "muttering". This result presented a growing one significant in parallel with the increase of the age group. Conclusion: It had not difference in the temporal auditory processing in the comparison between the groups.

Neurosensory deficit after orthognathic surgery

AIMS:This study was designed to determine the incidence of altered sensation in patients undergoing orthognathic surgery. METHOD: Seventy two patients who underwent orthognathic surgery between January, 1999 and December, 1999 constituted the study group. Seven patients were excluded because of lack of follow up. Sixty five patients were followed using objective and subjective neurologic testing during the period immediately following operation, 1 month, 2 months, 6 months, and 1 year postoperatively. Age ranged from 17 to 38 years, with a mean of 24.5 years. Male patients were 21, female 44. Twenty eight bilateral sagittal splitting ramus osteotomy(BSSRO) of mandible were performed, 35 BSSRO with genioplasty, 2 genioplasties. Information on the degree of intraoperative nerve encounter was obtained from the surgical reports in 47 patients and was divided into the following three categories: (1) the nerve was not encountered in 23 patients; (2) the nerve was exposed in 11 patients; (3) the nerve was exposed and repositioned from the proximal segment in 13 patients. RESULTS: Four patients reported altered nerve sensation of lower lip and/or chin(6.2%) at final follow up. Two patients underwent BSSRO and the other two patients BSSRO with genioplasty. Three of the patients underwent nerve exposure during the operation. CONCLUSION: We suggest that the nerve exposure during the operation might be partly responsible for nerve dysfunction after orthognathic surgery.

Neurosensory Recovery Of The Inferior Alveolar Nerve After Bilateral Sagittal Split Osteotomy

Inferior alveolar nerve repositioning in the atrophic posterior mandibular alveolar ridge

Preliminary Study of Neurosensory recovery after BSSRO

Preliminary study on histologic changes in the nerve and surrounding tissues after inferior alveolar nerve transposition in rabbits

PURPOSE: The purpose of this study was 1) to find nerve damage after inferior alveolar nerve transposition and 2) to examine whether the soft tissue or bone changes around the nerve produce the compression to the nerve in the healing period. MATERIALS AND METHOD: Inferior alveolar nerve was exposed through the bony window and the scratch was made in the bone to be thought as the inferior alveolar canal. Suture was made after the nerve was repositioned. The nerve and surrounding tissues were examined with the light microscope and the fluorescent microscope before surgery and at 1 month, 3 months, and 5 months after surgery. RESULTS: After surgery, the epineurium was damaged and the nerve was divided to several fascicles covered with the perineurium The newly formed fibrous connective tissue and vessels were seen around fascicles. There was new bone formation. However the nerve was not compressed by the connective tissue or the new bone. CONCLUSION: The results of this study suggest that neurosensory disturbances after inferior alveolar nerve transposition are resulted by the direct trauma in surgery rather than the compression to the nerve by the scar or new bone formation in the healing period.

Unilateral Idiopathic Maculopathy

This is a report of five patients who experienced slow, severe, unilateral central vision loss without a history of any other systemic illness. All patients were female and the age of the patients ranged from 21 to 33 years, with a mean age of 27 years. The follow-up period was 1 to 3 years. Each patient had a small yellowish spot in the fovea, which was associated with subretinal or retinal hemorrhage. No inflammatory cells were found in the vitreous or anterior chamber. Most patients presented with a visual acuity of 0.3 to 0.6. In one patient, the presenting visual acuity was 1. 0. Each patient described a central scotoma which was confirmed by Amsler`s grid test. The presenting manifestations of the disorder did not progress or recur in any of these patients during the period of follow-up. Visual acuity recovered to the visual acuity of the initial visit in three of five patients. The fluorescein angiogram revealed the early hyperfluorescence in the spot of the fovea which remained the same through the late phase. Three of five patients demonstrated a neurosensory detachment of the macula usually with irregular margins. The spot of the fovea showed hypofluorescence on the indocyanine green angiography. No hyperfluorescence in the center of the macula was found on the ICG-A. To the best of our knowledge, this unique clinical entity does not seem to be consistent with any previously described maculopathies in its clinical, angiographic features, and its natural course.