Influence of thermal cycles and disinfection on the roughness, microhardness and color of PETG/TPU and PMMA.

BACKGROUND: Occlusal splints can protect teeth during bruxism, preventing tooth wear, as well as during sports activities, shielding them from impacts. OBJECTIVES: To verify the influence of thermal cycles and disinfection on the roughness, microhardness and color of polyethylene terephthalate glycol/thermoplastic polyurethane (PETG/TPU) and poly(methyl methacrylate) (PMMA). MATERIAL AND METHODS: Thirty-six PETG/TPU samples and 36 PMMA samples were prepared (ø10 mm × 3 mm). Six groups were created according to the material and the disinfection method used (n = 12 each): PETG/TPU (glister), PETG/TPU (hypochlorite), PETG/TPU (soap), PMMA (glister), PMMA (hypochlorite), and PMMA (soap). Roughness, Knoop microhardness and color evaluations were performed before the experiments (T1), after thermocycling (T2) and after disinfection (T3). Three-way repeated measures analysis of variance (ANOVA) and Tukey's test were used for statistical evaluations. RESULTS: For roughness and color, ANOVA showed statistical significance based on the interaction between thermal cycling, material and disinfectant factors. In terms of Knoop microhardness, ANOVA showed statistical significance based on the interaction between thermal cycling and material factors. CONCLUSIONS: Roughness results were clinically acceptable in all groups at all time points, except the PETG/TPU and PMMA groups disinfected with hypochlorite. Microhardness significantly increased for both materials after thermal cycling, and at all time points, the microhardness of PMMA was significantly higher than that of PETG/TPU. After thermal cycling, the color changes were clinically unacceptable in all groups.

Estudo do nível de conhecimento e interesse do cirurgião dentista no diagnóstico e tratamento da síndrome da apnéia/hipopnéia obstrutiva do sono (SAHOS) / Study of the level of knowledge and interest of the dental surgeon in the diagnosis and treatment of obstructive sleep apnea/hypopnea syndrome (OSAHS)

Atualmente, o tratamento do ronco primário e da Síndrome da Apnéia/Hipopnéia Obstrutiva do Sono (SAHOS)1 através de aparelhos intra-orais (AIO) tem recebido a atenção dos pesquisadores pela comprovada eficácia destes dispositivos. Os aparelhos mais indicados são os reposicionadores de mandíbula que promovem um avanço mandibular, afastando os tecidos da orofaringe superior, o que evita a obstrução parcial ou total da área. Sua indicação é para casos de ronco primário e apnéias leves e moderadas2, no entanto é necessário que os candidatos apresentem número de dentes suficientes com saúde periodontal para a ancoragem do aparelho. Por ser uma doença de consequências sistêmicas graves, o tratamento da SAHOS é em sua essência de responsabilidade do médico especialista na área, porém o cirurgião dentista deve ter conhecimento para diagnosticar e tratar, quando o AIO for a opção terapêutica. A interpretação da polissonografia, exame que diagnostica e conduz para a escolha correta do tratamento, e dos dados cefalométricos são os principais quesitos ao Cirurgião Dentista que se propõe a tratar portadores da SAHOS. Nesse trabalho foi elaborado um questionário e aplicado aos cirurgiões dentistas de três diferentes cidades do Estado de São Paulo para que fosse possível avaliar o conhecimento desses profissionais a respeito do diagnóstico e tratamento da SAHOS. 70 Cirurgiões Dentistas foram entrevistados e os resultados mostraram que 70% destes têm interesse em trabalhar com os AIOs. Esse grupo se relacionou estatisticamente significante com aqueles que afirmaram já terem sido alguma vez questionado por algum paciente a respeito desse tratamento. Quanto à criação de uma especialidade para essa área, os profissionais da área de prótese e implante se mostraram mais interessados. E, do número total de entrevistados, apenas 25% já tiveram contato com esse tipo de aparelho, mas não conhece o protocolo de atendimento para o tratamento desses pacientes(AU)

Currently, the treatment of primary snoring and Obstructive Sleep Apnea/Hypopnea Syndrome (OSAHS)1 through intraoral appliances (OA) has received the attention of researchers due to the proven effectiveness of these devices. The most suitable devices are jaw repositioning devices that promote mandibular advancement, moving the tissues away from the upper oropharynx, which prevents partial or total obstruction of the area. Its indication is for cases of primary snoring and mild to moderate apnea2, however it is necessary that candidates have a sufficient number of teeth with periodontal health to anchor the appliance. As it is a disease with serious systemic consequences, the treatment of OSAHS is, in essence, the responsibility of the specialist in the area, but the dental surgeon must have the knowledge to diagnose and treat, when OA is the therapeutic option. The interpretation of polysomnography, na exam that diagnoses and leads to the correct choice of treatment, and cephalometric data are the main requirements for the Dental Surgeon who proposes to treat patients with OSAHS. In this work, a questionnaire was developed and applied to dentalsurgeons from three different cities in the State of São Paulo so that it was possible to assess the knowledge of these professionals regarding the diagnosis and treatment of OSAHS. 70 Dental Surgeons were interviewed and the results showed that 70% of them are interested in working with AIOs. This group had a statistically significant relationshipwith those who stated that they had already been asked by a patient about this treatment. Regarding the creation of a specialty for this area, professional in the area of ??prosthesis and implant were more interested. And, of the total number of respondents, only 25% have already had contact with this type of device, but do not know the care protocol for the treatment of these patients(AU)

Aparelhos de registro tipo "George Gauge" para posição mandibular terapêutica em aparelhos intra-orais para ronco primeiro e síndrome obstrutiva da apneia e hiponeia / Obstrutiva do sono (SHAOS) type recording devices "George Gauge" recording devices for therapeutic mandibular position in intraoralappliances for snoring first and obstructive sleepapnea hyponea syndrome (SHAOS)

As multifatoriedades do aumento da SHAOS têm diversas causas, desdês de obesidades até sedendarismo de grande proporção. No entanto a ciência tem feito grandes esforços para isso se altere. Mesmo assim muito tem que se pesquisar para um tratamento efetivo que seja capaz de ajudar o paciente a ter um sono reparador e uma qualidade de vida mais satisfatória. A sofisticação dos CPAP, melhores alternativas para o tratamento se sofisticaram de tal em volume, barulho e tamanho que estão aumentanto em muito sua utilização. Os mini-cpaps são uma prova disso. No entanto ainda nos confrontamos com a baixa adesão do tratamento frente ao desconforto causado. Ao aparelhos intra-orais são uma alternativa viáveis para os casos de IAH (índice de apneia e hipopneia) leve, moderada e ronco primário. Importante frisar que sem um exame de polissografia e teleradiografias laterais o Cirurgião Dentista não pode fazer nada(AU)

The multifactorial causes of the increase in SHAOS have several causes, from obesity to a large sedentary lifestyle. However science has made great efforts to change this. Even so, much remains to be researched for an effective treatment that is capable of helping the patient to have a restful sleep and a more satisfactory quality of life. The sophistication of CPAP, the best alternatives for treatment, has become so sophisticated in volume, noise and size that its use is greatly increasing. The mini-cpaps are proof of that. However, we are still faced with the low adherence to the treatment due to the discomfort caused. Intraoral appliances are a viable alternative for cases of mild, moderate AHI (apnea and hypopnea index) and primary snoring. It is important to emphasize that without a polysomnography exam and lateral teleradiographies, the Dental Surgeon cannot do anything(AU)

A higiene do sono como início do tratamento do ronco primário e síndrome da apneia e hipopneia do sono / Sleep hygiene as a starting point for the treatment of primary snoring and sleep apnea and hypopnea syndrome

O valor inestimável ao sono, devido a estudos que comprovaram sua importância à saúde e à qualidade de vida. Tais conhecimentos levaram a identificação de doenças específicas, dentre elas a Síndrome de Apnéia e Hipopnéia Obstrutiva do Sono (SAHOS). Esta doença incide na obstrução das vias aéreas superiores durante o sono, acarretando paradas na respiração e consequências sistêmicas. Estudos atuais e características que interferem na qualidade de vida dos sujeitos, tal como produtividade. O objetivo deste trabalho é o profissional saber que com atitudes cotidianas podemos anemizar o quadro necessitando dessa forma de um tratamento mais brando e de melhor acesso a todos(AU)

The priceless value of sleep, due to studies that have proven its importance to health and quality of life. Such knowledge led to the identification of specific diseases, among them the Obstructive Sleep Apnea and Hypopnea Syndrome (OSAHS). This disease focuses on obstruction of the upper airways during sleep, causing breathing stops and systemic consequences. Current studies and characteristics that inter the quality of life of subjects, such as productivity. The objective of this work is for the professional to know that with everyday attitudes we can anemize the condition, thus needing a milder treatment and better access to all(AU)

Os sinais e sintomas que o cirurgião dentista deve conhecer para ajudar na identificação de um paciente que precisa de tratamento de Síndrome da Apneia e Hipopneia do Sono / The signs and symptoms that the dentist should know to help in identifying a patient who needs treatment for Sleep Apnea and Hypopnea Syndrome

Ter um sono de qualidade é imprescindível para a saúde. Cada pessoa sabe a quantidade que a repara melhor. Dessa forma, sono em fora de hora de sesta pode ser problemas em potencial. Um paciente que adormeci em um tratamento dentário pode estar com um déficit de sono que o adormecer durante um tratamento dentário é uma situação inusitada que, pode ser um paciente que precisa de uma a polissonografia e um possível tratamento para o possível presente ronco primário e Síndrome da Apneia e Hipopneia Obstrutiva do Sono (SHAOS). O Cirurgião Dentista deve conhecer os sinais e sintomas mais comuns dos pacientes com problemas de sono para poder indicá-los corretamente a um médico especialista em sono. Dessa forma já se tem como certo que esse é um problema médico, no entanto o Cirurgião Dentista é um profissional importante nas modalidades de tratamento que temos para a síndrome. O simples ato da indicação e acompanhamento do tratamento faz o Cirurgião Dentista, importante nessa cadeia de tratamento(AU)

Getting quality sleep is essential for health. Each person knows the amount that repairs them best. So sleep outside of nap time can be potential problems. A patient who fell asleep in a dental treatment may have a sleep deficit that falling asleep during a dental treatment is an unusual situation that, may be a patient who needs a polysomnography and a possible treatment for the possible present primary snoring and syndrome. Obstructive Sleep Apnea and Hypopnea (SHAOS). The Dental Surgeon must know the most common signs and symptoms of patients with sleep problems in order to correctly refer them to a sleep specialist. Thus, it is already taken for granted that this is a medical problem, however the Dental Surgeon is an important professional in the treatment modalities we have for the syndrome. The simple act of indicating and monitoring the treatment makes the Dental Surgeon important in this treatment chain(AU)

Índices utilizados para diagnóstico e plano de tratamento do ronco primário e da síndrome da apnéia obstrutiva do sono (SAOS) / Assessment of the knowledge of dentists in the face of care for severe cardiac patients in primary care

Os distúrbios do sono vem sendo cada dia mais estudados e evidenciados perante a medicina, sendo que muitos destes estão atrelados a fatores etiológicos ligados a diversas doenças sistêmicas, tais como, hipertensão arterial, problemas cardíacos e fator de risco para diabetes. Sendo assim, a utilização de Índices como o de Epworth, Berlim e Pittsburgh como auxiliadores anamnésicos, é de grande valia para um correto diagnóstico. Por meio deste, pudemos concluir que tais índices são de extrema importância por serem referências iniciais para a solicitação de exames mais complexos e de alto custo. Portanto, este trabalho tem por objetivo fazer uma revisão da literatura sobre a essência científica de tais índices, analisando a eficácia dos mesmos(AU)

Sleep wake disorders see being increasingly studied day and evidenced before the medicine, and many of these disorders are linked to etiological factors related to various systemic diseases such as, hypertension, heart disease and a risk factor for diabetes. Thus, the use of indices such as the Epworth, Berlin and Pittsburgh as amnesic helpers, is of great value to a correct diagnosis. Through this we can conclude that such indices are extremely important because they are initial references to the request for more complex tests and costly. Therefore, this study aims to review the literature on the scientific essence of such indices, analyzing effectiveness(AU)

Reabilitação estética e funcional em paciente com desgaste dental acentuado: relato de caso clínico / Esthetic and functional rehabilitation in a patient with excessive dental wear: a case report

O uso de facetas cerâmicas de dissilicato de lítio é uma excelente opção para a correção estética e funcional de dentes com alteração de formato, como o causado por desgaste dental acentuado, pois esse material apresenta características mecânicas e ópticas adequadas. Assim, o objetivo deste estudo foi descrever os procedimentos de reabilitação com facetas cerâmicas de um paciente jovem com desgaste dental acentuado. Paciente do gênero masculino, 26 anos, buscou atendimento devido à cor insatisfatória dos seus dentes. Durante a anamnese, paciente relatou não ranger ou apertar os dentes, contudo afirmou elevado consumo de alimentos ácidos e uso de força excessiva durante a escovação dental. Durante o exame clínico, foi observado desgaste dental acentuado na face vestibular dos dentes maxilares e leve na superfície oclusal dos dentes posteriores. Foi proposta a instalação de facetas cerâmicas de dissilicato de lítio dos elementos 15 ao 25 e de placa interceptora. O resultado da reabilitação foi satisfatório para o paciente devido ao reestabelecimento da estética, função e auto-estima(AU)

The use of ceramic facets of lithium disilicate is an excellent option for the aesthetic and functional correction of teeth with alteration of shape, such as that caused by accentuated dental wear, since this material presents adequate mechanical and optical characteristics. Thus, the objective of this study was to describe the rehabilitation procedures with ceramic facets of a young patient with marked dental wear. A male patient, 26 years old, sought care due to the unsatisfactory color of his teeth. During the anamnesis, patient reported no grinding or grinding of teeth, however, he stated high consumption of acidic foods and excessive force during dental brushing. During the clinical examination, sharp dental wear was observed on the buccal face of the maxillary teeth and light on the occlusal surface of the posterior teeth. It was proposed the installation of ceramic facets of lithium disilicate of elements 15 to 25 and of interceptor plate. The result of the rehabilitation was satisfactory for the patient due to the reestablishment of aesthetics, function and self-esteem(AU)

Tratamento com aparelho intra-oral da síndrome obstrutiva do sono (SAHOS): relato de caso / Treatment with intra-oral appliance of obstructive sleep apnea syndrome (OSAS): case report

O objetivo deste trabalho foi analisar o tratamento com o uso de aparelhos intra- orais para a síndrome de apneia e hipopnéia obstrutiva do sono e relatar o caso de um paciente portador da síndrome em estágio moderado. O presente caso clínico trata-se de um paciente de 37 anos de idade, portador de síndrome de apneia e hipopneia obstrutiva do sono (SAHOS) moderada, diagnosticada por um exame de polissonografia, que se apresentou com os seguintes sintomas: sonolência e cansaço diurno, possuía apneias durante o sono, além de reportar que sofria de bruxismo e ronco, segundo ele, tudo referido por sua cônjuge. A modalidade de tratamento utilizada foi o aparelho intrabucal, do tipo protrusor mandibular, o qual é um tratamento não invasivo indicado a princípio nos casos de ronco primário e nessa síndrome de grau leve e moderado. O tratamento realizado foi eficaz na melhora da sintomatologia, desobstruindo a passagem de ar nas vias aéreas superiores, permitindo melhor ventilação do paciente e controlando os efeitos colaterais e secundários da síndrome. Os resultados da polissonografia com a utilização do aparelho intra-oral, foi alvo de discussão relatada neste trabalho(AU)

The objective of this study was to analyze the treatment with the use of intra-oral devices for sleep apnea-hypopnea syndrome Obstructive sleep and report the case of a patient with the syndrome in the moderate stage. The present case it is of a white, 37-year-old boy with an apnea-hypopnea syndrome moderate obstructive sleep, who presented with the following symptoms: sleepiness and daytime tiredness, had sleep apneas, and informed us that suffered from bruxism and snoring. The treatment modality used was the intraoral appliance, which is a non-invasive treatment used for this syndrome of mild to moderate. Final Thoughts: The treatment was effective in improving symptoms, clearing the air passage in the upper airway, allowing better ventilation of the patient and controlling side effects and secondary syndrome. However polissonografy results was object of discussion in the paper(AU)

Exames para o diagnóstico da síndrome da apnéia obstrutiva do sono: conhecimentos gerais para o cirurgião dentista que atua na área do sono / Investigations for the diagnosis of the syndrome obstructive sleep apnea: general knowledge for the dentist surgery that works in the sleep area

A Síndrome da Apneia e Hipopnéia Obstrutiva do Sono (SAHOS) foi descrita há quase três décadas na literatura, porém somente há pouco tempo tem conseguido o crescente interesse dos cirurgiões-dentistas; por isso foi feita esta revisão de literatura sobre a inter-relação entre a análise cefalométrica e os pacientes portadores desta patologia. Os estudos revisados mostram que existem diferenças significantes entre uma série de características da via aérea superior e das dimensões esqueléticas entre os pacientes com SAHOS e indivíduos normais. Foi observado que a análise cefalométrica tem sido utilizada como um importante meio auxiliar no diagnóstico e no planejamento do tratamento da Síndrome da Apneia e Hipopnéia Obstrutiva do Sono, associando um grande número de variáveis à prevalência desta síndrome. Esses conhecimentos básicos são de grande importância para o Cirurgião Dentista que atua na área da Odontologia do Sono(AU)

The Syndrome Obstructive Sleep Apnea (OSA) was described almost three decades ago in the literature, but only recently has stimulated a growing interest of dental surgeons; therefore was done this review of literature on the interrelationship between cephalometric analysis and patients with this pathology. The reviewed studies show that there are significant differences between a number of characteristics of the upper airway and skeletal dimensions between OSA patients and people in their normal stages. It was observed that the cephalometric analysis has been used as an important tool in the diagnosis and treatment planning Syndrome Obstructive Sleep Apnea, associating an extensive number of variables to the prevalence of this syndrome. This basic knowledge is of great importance for the Dental Surgeon who works in the area of Odontology Sleep(AU)

Expander Eye Prosthesis Assisting Ocular Rehabilitation in Child with Eye Loss.

This clinical report describes the ocular rehabilitation of a child, initially using an acrylic expander and subsequently the conventional prosthesis. A two-month-old anophthalmic female patient was referred to Araçatuba Dental School, for rehabilitation with ocular prosthesis. The treatment chosen was the manufacturing of expander prostheses changed periodically until the socket reached an adequate size, so that a definitive ocular prosthesis could be installed. The acrylic expander remained in patient's anophthalmic socket for 60 days in order to restore its volume. After this period, ocular prosthesis was installed and replaced according to facial growth. It can be observed that the expander prostheses increased the anophthalmic cavity and provided patient's adaptation for using an ocular prosthesis. The ocular prosthesis set the face aesthetic balance which eventually reflects positively on psychological and social development of the child.

Systemic Trans- and Postoperative Evaluations of Patients Undergoing Dental Implant Surgery.

OBJECTIVE: The aims of this study were to examine the trans- and postoperative systemic characteristics of patients undergoing dental implant surgery and to investigate the relationship between pre- and post- surgery anxiety levels. MATERIAL AND METHODS: Thirty-nine patients were analyzed in 3 call centers to determine anxiety levels, pain levels, and preoperative and postoperative histories using the State-Trait (STAI) questionnaire. RESULTS: A total of 93 dental implants were installed, with a success rate of 100%. The most frequently reported systemic disease was hypertension. There was a significantly higher rate of effective clamping (torque) to the mandibular bone than to the maxillary bone. The association between postoperative surgical complications and longer operative time was not significant, but there was a significant correlation between the alteration of mouth opening and daily routine activities and a significant decrease in anxiety levels between the day of surgery and the postoperative time point (p =0.006). CONCLUSION: A longer surgical time was associated with surgery-related complications and with a higher anxiety index on the preoperative evaluation.

Systemic Trans- and Postoperative Evaluations of Patients Undergoing Dental Implant Surgery

OBJECTIVE: The aims of this study were to examine the trans- and postoperative systemic characteristics of patients undergoing dental implant surgery and to investigate the relationship between pre- and post- surgery anxiety levels. MATERIAL AND METHODS: Thirty-nine patients were analyzed in 3 call centers to determine anxiety levels, pain levels, and preoperative and postoperative histories using the State-Trait (STAI) questionnaire. RESULTS: A total of 93 dental implants were installed, with a success rate of 100%. The most frequently reported systemic disease was hypertension. There was a significantly higher rate of effective clamping (torque) to the mandibular bone than to the maxillary bone. The association between postoperative surgical complications and longer operative time was not significant, but there was a significant correlation between the alteration of mouth opening and daily routine activities and a significant decrease in anxiety levels between the day of surgery and the postoperative time point (p =0.006). CONCLUSION: A longer surgical time was associated with surgery-related complications and with a higher anxiety index on the preoperative evaluation.

Papel do cirurgião dentista no tratamento do ronco primário e apneia obstrutiva do sono / Surgeon’s role in dentist husky primary treatment and sleep apnea obstructive

A Síndrome da Apneia Obstrutiva do Sono (SAOS) vem despertando muito interesse por ser uma condição não estabelecida totalmente na medicina. Trata-se de microdespertares que geram a fragmentação do sono, e consequentemente, prejudica a coordenação motora, deficiências hormonais, capacidade de raciocínio, entre outros. Os sinais e sintomas comuns são o ronco, sonolência excessiva diurna, perda de memória, irritabilidade, falta de atenção. Para diagnóstico, a Polissonografia (PSG) é o exame padrão ouro e um treinamento aos cirurgiões dentistas é necessário para que saibam interpretá-lo e realizar o tratamento cabível a classe odontológica

Obstructive Apnea Syndrome (OSAS) is attracting much interest because it is a condition not fully established in medicina. Trata up of arousals that generate sleep fragmentation, and consequently impairs motor coordination, hormone deficiencies, thinking ability , among others. The common signs and symptoms are snoring, excessive daytime sleepiness, memory loss, irritability, lack of attention. For diagnosis, polysomnography (PSG) is the gold standard examination and training to dentists need to know to interpret it and perform the appropriate treatment the dental profession

O tratamento da apneia obstrutiva do sono e a utilização de implantes osseointegráveis - revisão de literatura / The treatment of obstructive sleep apnea and dental implants use - literature review

A síndrome da apneia obstrutiva atinge milhões de pessoas ao redor do mundo. Os aparelhos reposicionadores da mandíbula têm sido indicados nos casos de grau leve/moderado da síndrome, entretanto, nos pacientes edêntulos a sua utilização é deficiente, pois não há retenção. Assim, o objetivo deste estudo foi realizar uma revisão sob a utilização deste método de tratamento quando utilizado simultaneamente aos implantes osseointegráveis. Realizou-se uma revisão nas bases de dados Medline/PubMed, ISI, Cochrane, Dentistry Oral Science, Clinical Trials, Controlled Trials e Bireme-Bvs sobre o tema dental implant / sleep apnea syndrome, e localizou-se 22 artigos. Após avaliação sob os critérios de inclusão, selecionou-se 2 estudos e complementou-se a revisão com uma análise de estudos randomizados e controlados nas sete bases anteriores com os unitermos: sleep apnea syndrome and appliance oral and randomized controlled Trial, e 37 artigos foram localizados que, após os critérios de inclusão, selecionou-se 17. Os estudos abordando a utilização de implantes osseointegráveis como meio coadjuvante na estabilização de aparelhos reposicionadores da mandíbula são escassos, e são do tipo caso clínico que apontam efetividade na técnica. Os estudos analisando o efeito desses aparelhos em pacientes dentados indicam melhoria nos níveis de apneia e ronco. A utilização de aparelhos reposicionadores mandibulares em pacientes dentados é uma técnica efetiva em pacientes com síndrome da apneia obstrutiva leve/moderada. São necessários estudos com controle e randomizados para analisar a utilização de aparelhos de reposição mandibular com auxílio de implantes osseointegráveis nesta década.

The obstructive sleep apnea syndrome affects millions of people around the world. The mandibular repositioning devices have been indicated in cases of mild/moderate syndrome; however in edentulous patients its use is deficient since there is no retention. Therefore the objective of this study was to conduct a review on the use of this treatment method combined to osseointegrated implants. A search on the theme: Dental implant and sleep apnea syndromewas performed in the Medline/PubMed, ISI, Cochrane, Dentistry Oral Science, Clinical Trials, Controlled Trials, and Bireme-BvS, databases, and 22 articles were found. After an evaluation 2 studies were selected and the review was complemented with an analysis of randomized controlled trials in the previous seven bases using the key-words: Sleep apnea syndrome, Oral appliance and Randomized controlled trial. The search returned 37 articles, and after they were submitted to inclusion criteria 17 studies were selected. There are a small number of studies presenting the use of dental implants as a mean to assist the stabilization of the mandibular repositioning appliances; those that are available are case reports that focusing on the effectiveness of the technique. Studies examining the effect these appliances in dentate patients indicate improvement in the levels of apnea and snoring. The use of mandibular repositioning appliances in dentate patients is an effective technique in treatment of patients with obstructive sleep apnea syndrome mild/moderate. Randomized controlled trials are required in order to enable an analysis of the use of mandibular repositioning devices with the aid of dental implants

Uso de implantes zigomáticos na fixação de próteses bucomaxilofaciais / Use of zygomatic implants in the fixacion of maxillofacial prothesis

A prótese bucomaxilofacial tem como objetivo a reabilitação de indivíduos com deformidades craniofaciais, decorrentes de traumatismos, más formações congênitas ou tumores. Muitas pesquisas foram realizadas para melhorar a estabilidade e retenção das próteses em pacientes mutilados. Com o advento da osseointegração, a prótese bucomaxilofacial sofreu um grande avanço tornando possível a realização de trabalhos protéticos com estabilidade, qualidade estética e resultados previsíveis. Esse trabalho faz uma revisão de literatura a respeito do uso de implantes zigomáticos na fixação de próteses bucomaxilofaciais...

The maxillofacial prosthetic rehabilitation aims of individuals with craniofacial deformities resulting from trauma, congenital malformations or tumors. Many researches have been done to improve the stability and retention of dentures in patients. With the advent of osseointegration, the maxillofacial prosthesis suffered a major advance making possible the realization of prosthetic works with stability, aesthetic quality and predictable results. This paper reviews the literature regarding the use of zygomatic implants in the fixation of maxillofacial prostheses...

Effect of thermal cycling and disinfection on microhardness of acrylic resin denture base.

The purpose of this study was to investigate the effect of thermal cycling and disinfection on the microhardness of acrylic resins denture base. Four different brands of acrylic resins were evaluated: Onda Cryl, QC 20, Classico and Lucitone. Each brand of acrylic resin was divided into four groups (n = 7) according to the disinfection method (microwave, Efferdent, 4% chlorhexidine and 1% hypochlorite). Samples were disinfected during 60 days. Before and after disinfection, samples were thermal cycled between 5-55 °C with 30-s dwell times for 1000 cycles. The microhardness was measured using a microhardener, at baseline (B), after first thermal cycling (T1), after disinfection (D) and after second thermal cycling (T2). The microhardness values of all groups reduced over time. QC-20 acrylic resin exhibited the lowest microhardness values. At B and T1 periods, the acrylic resins exhibited statistically greater microhardness values when compared to D and T2 periods. It can be concluded that the microhardness values of the acrylic resins denture base were affected by the thermal cycling and disinfection procedures. However, all microhardness values obtained herein are within acceptable clinical limits for the acrylic resins.

Photoelastic analysis of the influence of residual ridge inclination in conjugated class I mandibular prostheses with different attachment systems.

OBJECTIVES: The aim of this study was to evaluate the stress distribution in mandibular free-end removable partial dentures (RPD) associated with FPD in the abutment teeth considering different inclinations of the residual ridge: (1) horizontal and (2) distal descending ridges and two designs of free-end RPD with different attachment systems were tested: (1) clasp and (2) system ERA. METHODS: Axial loads (100 N) were applied on the teeth of the RPD. The images were recorded and the stress distribution was evaluated through photoelastic fringes. RESULTS: In general, the distal descending ridge presented more photoelastic fringes in the region of the roots of the abutment teeth while the horizontal ridge exhibited higher compression in the base of the prosthesis. In the horizontal ridge, the denture with clasp presented more favourable stress distribution than the denture with the system ERA. In the distal descending ridge, the denture with the system ERA relieved the region of the abutment teeth and overloaded the residual ridge. CONCLUSION: The horizontal ridge presented more favourable performance; the dentures with clasp exhibited better performance for both ridges evaluated; the denture with the system ERA presented better results in the distal descending ridge.

Implant-retained finger prosthesis with modified retention system.

BACKGROUND: Amputations affect both the physical and the psychological aspects of an individual, causing significant impact on self-esteem. The main causes of finger amputations are work-related accidents with dangerous machinery, road traffic accidents, and animal bites, as well as systemic diseases such as diabetes. This report aims to describe a simple technique for fabrication of implant-retained finger prosthesis with a modified base of the retention system. CASE DESCRIPTION AND METHODS: The O-Ring retention system was used with a modified hexagon-shaped base and a metallic capsule adapted to the acrylic resin to attach the prosthesis to the implant. FINDINGS AND OUTCOMES: The prosthesis was made with silicone, and after osseointegration, it was installed without complications, leading to a patient satisfied with the end result and encouraged to return to social life. CLINICAL RELEVANCE: Restoring self-esteem in the patient and static and functional rehabilitation.

Solução estética para prótese sobre implante / Aesthetic solution for implant supported prosthesis

Próteses sobre implantes esteticamente favoráveis estão diretamente relacionadas com a condição dos tecidos moles e duros que as envolvem. A preservação dos tecidos mucogengivais ao redor de implantes dentários instalados na maxila anterior propicia um sorriso harmonioso, com uma estética bastante agradável. No entanto, em alguns casos, isso não ocorre principalmente pela grande reabsorção tecidual na região, na qual deveria ter sido realizado enxerto ósseo, antes mesmo da instalação dos implantes. Desse modo, o objetivo deste trabalho foi apresentar uma solução reabilitadora estética para essas possíveis falhas durante o planejamento com reabilitações sobre implantes, por meio de gengiva artificial cerâmica

Implant supported prosthesis aesthetically favorable are directly related to the condition of the hard and soft tissues that surround them. The mucogengival tissue preservation around dental implants installed in the anterior maxilla provides a harmonious smile, with a pretty nice aesthetic. However, in some cases, this does not occur primarily by large tissue resorption on the region, in which should have been performed bone graft, even before the installation of the implants. Thus, the aim of this paper was to present a solution for these aesthetic rehabilitative potential failures during the planning of rehabilitation with implants through ceramic artificial gingiva

Higienização em prótese sobre implante / Hygiene in implant denture

Com a evolução dos princípios da osseointegração as próteses implantossuportadas estão se transformando em uma opção rotineira de tratamento. O sucesso de um implante está associado inicialmente à técnica cirúrgica, a estabilidade primária e a ausência de contaminação bacteriana do implante. Posteriormente, a ausência de trauma mecânico ou sobrecarga e periimplantite são fundamentais para esse sucesso. Portanto, para que a reabilitação com próteses implantossuportadas seja adequada, a manutenção rigorosa de higiene oral é necessária para evitar o acumulo de placa bacteriana ao redor do implante. A principal responsabilidade do cirurgião em relação aos pacientes que serão reabilitados é fornecer um prognóstico favorável a longo prazo. Para isso, durante a confecção da prótese o protesista deve observar o design e o perfil de emergência da prótese, a profundidade do sulco periimplantar e também ocorrência de distúrbio motor ou psicológico por parte do paciente. Os indivíduos que perderam dentes e serão submetidos à esse tipo de reabilitação necessitam de motivação e instrução adequada em relação à higienização e sua importância, pois a melhor maneira de se obter longevidade da prótese e consequentemente a satisfação do paciente em relação ao tratamento é a prevenção. Diante do exposto, o objetivo do presente trabalho foi realizar uma revisão de literatura sobre higienização em prótese sobre implante

With the advances of osseointegration principles, the use of implant-supported prosthesis has become a routine treatment option. The success of an implant is initially associated to the surgical technique, primary stability and absence of bacterial contamination on the implant site. Subsequently, the absence of mechanical trauma (overload) and peri-implantitis are sine qua non conditions to the longitudinal success of implant treatment. Therefore, the strict maintenance of oral hygiene is highly important to avoid biofilm accumulation around the implant and consequently to provide last-long implant-supported dentures. The clinician has the responsibility to supply a favorable prognosis to the patient so that the rehabilitation succeed. For this reason, during prosthesis fabrication the clinician should observe the design and emergency profile of the prosthesis, the peri-implant sulcus depth as well as the presence of motor or psychological impairment by the patient. Subjects with missing teeth and that will be submitted to the implant treatment should be motivated and adequate instructed regarding oral hygiene and its importance since the best option to obtain treatment longevity and consequently patient’s satisfaction is the prevention. Therefore, this study aimed to perform a literature review about the hygiene of implant-supported prosthesis