Nonsexual violence against children and adolescents: a study in a Latin American tertiary and university hospital.

OBJECTIVE: The objective of this study was to assess interpersonal nonsexual violence against children and adolescents in a tertiary university hospital. METHODS: A cross-sectional study was performed in 240 patients under nonsexual violence situation for 15 consecutive years. Data analyses included demographic data, hospital referral site, type and author of nonsexual violence, legal referral, laboratorial and imaging examinations, and outcomes. RESULTS: Nonsexual violence situation was diagnosed in 240 (0.1%) of 295,993 patients for 15 years: 148 (61.7%) in children and 92 (38.3%) in adolescents. Out of 240, the most frequent types of violence were negligence in 156 (65.0%), physical 62 (25.8%), psychological/emotional aggression 52 (21.7%), Munchausen by proxy syndrome 4 (1.7%), and bullying/cyberbullying in 3 (1.3%). Out of 123, the most common pediatric chronic conditions were chronic kidney disease 24 (19.5%), human immunodeficiency virus 14 (11.4%), prematurity 9 (7.3%), cerebral palsy 8 (6.5%), and asthma 8 (6.5%). Further comparison between children versus adolescent under nonsexual violence situation revealed significant difference between the hospital referral sites. The frequency of patients under violence referred from outpatient clinics was significantly reduced in children versus adolescents (27.7 vs. 62%), whereas emergency department was higher in the former group (57.4 vs. 25.0%; p<0.001). All types of violence situations and pediatric chronic conditions were similar in both groups (p>0.05). CONCLUSIONS: Nonsexual violence against our pediatric population was rarely diagnosed in a tertiary hospital, mainly negligence, physical, and psychological/emotional aggression. Approximately two-thirds of violence diagnosis occurred in children, referred mainly by the emergency department. In contrast, approximately one-third of violence diagnosis occurred in adolescents, referred mostly by outpatient clinics.

Nonsexual violence against children and adolescents: a study in a Latin American tertiary and university hospital / Violência não sexual contra crianças e adolescentes: um estudo em um hospital universitário e terciário da América Latina

Abstract Objective: The objective of this study was to assess interpersonal nonsexual violence against children and adolescents in a tertiary university hospital. Methods: A cross-sectional study was performed in 240 patients under nonsexual violence situation for 15 consecutive years. Data analyses included demographic data, hospital referral site, type and author of nonsexual violence, legal referral, laboratorial and imaging examinations, and outcomes. Results: Nonsexual violence situation was diagnosed in 240 (0.1%) of 295,993 patients for 15 years: 148 (61.7%) in children and 92 (38.3%) in adolescents. Out of 240, the most frequent types of violence were negligence in 156 (65.0%), physical 62 (25.8%), psychological/emotional aggression 52 (21.7%), Munchausen by proxy syndrome 4 (1.7%), and bullying/cyberbullying in 3 (1.3%). Out of 123, the most common pediatric chronic conditions were chronic kidney disease 24 (19.5%), human immunodeficiency virus 14 (11.4%), prematurity 9 (7.3%), cerebral palsy 8 (6.5%), and asthma 8 (6.5%). Further comparison between children versus adolescent under nonsexual violence situation revealed significant difference between the hospital referral sites. The frequency of patients under violence referred from outpatient clinics was significantly reduced in children versus adolescents (27.7 vs. 62%), whereas emergency department was higher in the former group (57.4 vs. 25.0%; p<0.001). All types of violence situations and pediatric chronic conditions were similar in both groups (p>0.05). Conclusions: Nonsexual violence against our pediatric population was rarely diagnosed in a tertiary hospital, mainly negligence, physical, and psychological/emotional aggression. Approximately two-thirds of violence diagnosis occurred in children, referred mainly by the emergency department. In contrast, approximately one-third of violence diagnosis occurred in adolescents, referred mostly by outpatient clinics.

Objetivo: Avaliar violência interpessoal não sexual contra crianças e adolescentes em um hospital universitário terciário. Métodos: Foi realizado um estudo transversal com 240 pacientes em situação de violência não sexual por 15 anos. A análise incluiu: dados demográficos, local de referência do hospital, tipo e autor da violência, encaminhamento legal, exames laboratoriais e de imagem, e desfechos graves. Resultados: Situações de violência não sexual foram diagnosticadas em 240 de 295.993 (0,1%) pacientes durante os 15 anos do período: 148/240 (61,7%) em crianças e 92/240 (38,3%) em adolescentes. Os tipos de violências mais frequentes foram negligência em 156/240 (65,0%), violência física 62/240 (25,8%), agressão psicológica/emocional 52/240 (21,7%), síndrome de Münchausen por procuração 4/240 (1,7%) e bullying/cyberbullying em 3/240 (1,3%). As condições crônicas pediátricas mais frequentes foram: doença renal crônica 24/123 (19,5%), vírus da imunodeficiência humana 14/123 (11,4%), prematuridade 9/123 (7,3%), paralisia cerebral 8/123 (6,5%) e asma 8/123 (6,5%). Comparações entre crianças e adolescentes em situação de violência não sexual revelaram que houve diferença significativa entre os locais de referência do hospital. A frequência de pacientes sob violência encaminhados de ambulatórios foi significantemente reduzida em crianças versus adolescentes (27,7 vs. 62%), enquanto encaminhamentos de pronto-socorro foram mais numerosos no primeiro grupo (57,4 vs. 25%, p<0,001). Os tipos de violências e condições pediátricas crônicas foram semelhantes nos dois grupos(p>0,05). Conclusões: Violência não sexual na nossa população pediátrica foi raramente diagnosticada em um hospital terciário, principalmente negligência, agressão física e psicológica/emocional. Aproximadamente dois terços dos diagnósticos de violência ocorreram em crianças, preferencialmente encaminhadas pelo departamento de emergência. Em contrapartida, cerca de um terço dos diagnósticos de violência ocorreu em adolescentes, encaminhados principalmente pelos ambulatórios.

Employment of U-Shape Technique at Reentry Surgery for Papillae Coronal Migration on the Rehabilitation of Anterior Single Implant: 3-Year Follow-Up Case Report.

INTRODUCTION: The rehabilitation of a maxillary single dental implant represents a great challenge at clinical practice. Harmony among the implant-supported crown and adjacent teeth is required in which concerns pink and white esthetics. The aim of the present case report is to depict a multidisciplinary treatment in which the U-shape flap technique for papillae preservation at second stage surgery was used. CASE PRESENTATION: One female patient presenting an un-rehabilitated dental implant at the left central incisor position sought treatment at the Centre of Education and Research on Dental Implants (CEPID). Alterations of color, shape, and position were observed on the anterior maxillary teeth. For proper treatment planning, radiograph, wax-up, and mock-up were performed. Second stage surgery was performed by the U-shape flap technique. A trunnion abutment was installed at the implant and a provisional subcontoured cemented crown was manufactured. Dental bleaching, feldspathic veneers, and a ceramic crown were performed. Oral hygiene instructions were recommended. Follow-up appointments were set at 1.5 and 3 years after restoration placement. After 3-year follow-up, soft tissue stability and health were preserved and papillae coronal migration around the single dental implant was observed. A complication-free treatment was reached, and patient demonstrated satisfaction towards esthetic and function. CONCLUSIONS: The use of U-shape technique at second stage surgery associated to adequate prosthetic contour improved soft tissue esthetic outcomes, while the multidisciplinary treatment planning provided adequate solutions, refining harmony between dental and implant-supported components.

Prótese unitária metalocerâmica para implantes colocados em nível ósseo: a estratégia para o pilar Gold / Single-tooth implant-supported metalloceramic crowns for bone level implants: the Gold abutment strategy

O planejamento protético sobre os atuais sistemas de implantes dentais tipo cone-morse junto à prótese parafusada procura obter uma versatilidade protética, facilidade de elaboração, boa resposta biológica, reversibilidade e estética, apresentando-se como um pilar protético com cilindro de plástico que permite fabricação diretamente para a fixação no implante, envolvendo o mecanismo antirrotacional, e sendo uma alternativa no tratamento de reabilitação em casos de requerimento estético em implantes instalados no nível ósseo (Bone level, Straumann). Este relato de caso descreveu o procedimento de exodontia atraumática, seguida da instalação de implante imediato com preenchimento de gap, e subsequente sequência clínica da reabilitação sobre implante cone-morse com componente protético com cilindro de plástico (Gold abutment, Straumann), que promove maior previsibilidade estética na reabilitação em implantes instalados no nível ósseo, apresentando um prognóstico satisfatório e equilíbrio mecânico/funcional que envolve mecanismo antirrotacional.

The prosthetic design on the current cone morse dental implant systems, together with the screwed prosthesis, seeks prosthetic versatility, ease of preparation, good biological response, retrievability and aesthetics, presenting a prosthetic abutment with a plastic burnout cylinder for direct connection to the implant with an antirrotational mechanism for esthetic situations involving a bone level implant (Straumann). This case report describes the atraumatic extraction procedure, followed by the installation of an immediate gap filling implant, and a subsequent clinical sequence using the Gold abutment (Straumann) plastic prosthetic component, which promotes greater aesthetic predictability in the rehabilitation of implants installed at the bone level, presenting a satisfactory prognosis and mechanical/functional balance involving antirotation mechanism.

A Step-by-Step Management of Extraction Sites in Areas of Maxillary Sinus Pneumatization: A Literature Review and a Case Presentation of a New Surgical Technique.

INTRODUCTION: The rehabilitation of the posterior maxilla with implant-supported prosthesis is often complicated by pneumatization of the maxillary sinus. Bone grafting is commonly required in these cases. Over the years, a number of techniques have been developed for this type of reconstruction. AIM: Present and discuss the possibility of alveolar bone regeneration for subsequent placement of oral implants using Fugazzotto's technique in combination with particulate autograft harvested from the mandibular ramus and a connective tissue pedicle flap to cover the graft. METHODS: A case of a 37-year-old woman with a molar perforated during endodontic treatment and indicated for extraction and implant placement is reported. RESULT AND CONCLUSION: The clinical case showed the possibility of grafting of extraction sites combined with atraumatic elevation of the maxillary sinus floor can be achieved using non-conventional techniques such as Fugazzotto's technique associated with alveolar bone regeneration.

Prótese cimentada-parafusada. Uma proposta em reabilitação implantossuportada / Screwed cement retained prosthesis. A proposal for implant supported rehabilitation

Para que o sucesso em reabilitações com prótese sobre implante seja alcançado e se obtenha longevidade, é necessário que haja harmonia com os tecidos circundantes. Uma das maneiras de classificar tais próteses é de acordo com o método de retenção, podendo as mesmas serem parafusadas ou cimentadas. Ambas se encontram bem descritas na literatura e bem aceitas por cirurgiões-dentistas, porém apresentam algumas limitações técnicas, biológicas e/ou estéticas. Com o objetivo de contornar estas limitações, pode-se utilizar uma técnica pouco descrita e difundida, que consiste na associação dos métodos de retenção, resultando em uma prótese cimentada/parafusa, que oferece uma maior versatilidade protética, facilidade de fabricação, boa resposta biológica, estética e reversibilidade, permitindo a remoção da prótese para eventuais reparos sem comprometimento da mesma. No presente caso, esta técnica será descrita de maneira clara e eficaz, permitindo a reprodução da mesma. O paciente foi reabilitado com este novo design de prótese, o resultado obtido foi satisfatório e o mesmo não apresentou nenhuma evidência clínica ou complicação após a instalação e no acompanhamento após 1 ano. As condições de função, características do tecido peri-implantar e estética permanecem mantidas durante o período de acompanhamento, garantindo o sucesso do caso...

In order to obtain a successful and lasting rehabilitation with implant-supported prosthesis it is necessary to achieve harmony with the surrounding tissues. Regarding retention method, prostheses can be classified as screwed or cemented. Both techniques are well described in the literature and accepted by dentists, but present some technical, biological and/ or aesthetic limitations. In order to overcome these limitations, it is possible to use a rarely described and widespread technique that consists in the combination of retention methods, resulting in a cemented-screwed prosthesis. This technique enables greater versatility, easier manufacturing, good biological response, aesthetics and reversibility, allowing removal of the prosthesis for repairs without compromising the structure. The present study describes this technique in a clear and effective way in order to allow its reproduction. The patient was rehabilitated with this new prosthesis design, with satisfactory result and no clinical signs nor complications after installation and along the 1 year follow-up. The conditions of function, features of peri-implant tissue, and aesthetics were maintained during the period of monitoring, ensuring the success of the case...

Occlusal rehabilitation of pseudo-class III patient.

To treat a patient with anterior crossbite, the clinician should first assess if it is a genuine class III or a pseudo-class III malocclusion. Cephalometric analysis is important; however, registering a patient's centric relation (CR) is simple, quick, and costless and can play a decisive role in a differential diagnosis for this type of patient profile. This clinical report depicts a patient clinically diagnosed as class III. After mandible manipulation in CR, it was noted that the patient in question was a pseudo-class III. The treatment was based on the pseudo-class III diagnosis. Therefore, the patient was rehabilitated by occlusal adjustments and conventional and implant-supported prostheses and without the need for invasive orthognathic surgery.

Passo a passo de sele‡Æo de componentes prot‚ticos / Step by step of abutment selection

Para as restaura‡ães prot‚ticas implantossuportadas alcan‡arem sucesso com longevidade e previsibilidade, ‚ de fundamental importƒncia a sele‡Æo adequada do sistema de reten‡Æo/conexÆo com o implante. O objetivo deste estudo foi esclarecer e fornecer embasamento cient¡fico aos cirurgiães dentistas para escolha adequada do tipo de restaura‡Æo implantossuportada nas mais variadas situa‡ães cl¡nicas. Segundo a revisÆo da literatura ‚ imprescind¡vel o conhecimento de fatores, como posicionamento do implante, aspectos oclusais, espa‡o interoclusal, requisitos est‚ticos, tecidos moles peri-implantares, necessidade de manuten‡Æo e reversibilidade da restaura‡Æo. Os profissionais da Implantodontia devem atentar para a enorme variedade de componentes prot‚ticos, bem como estarem aptos a realizar sua correta indica‡Æo e utiliza‡Æo.

In order to achieve success with predictability and longevity of implant restorations the proper selection of the retention system is extremely important. The objective of this study was to clarify and provide a scientific basis to guide dentists on the choice of the most appropriate type of implant supported restoration in different clinical situations. According to the literature it is essential to know factors, such as positioning of the implant, occlusal aspects, interocclusal space, aesthetic requirements, peri-implant soft tissues, maintenance and restoration of reversibility, prosthetic components and existing abutments. The professional must consider the variety of prsothetics components available, and be able to prescribe and utilize them properly.

Treatment of odontogenic myxoma: a multidisciplinary approach-6-year follow-up case.

The most aggressive diseases that affect the oral environment are considered tumors of the jaw. The surgical treatment is preferably done by surgical resection of the lesion, resulting in a great loss of tissue and esthetics. Multidisciplinary planning is required for the rehabilitation of these cases. Autogenous grafting techniques or vascularized flaps allow ridge reconstruction for implant placement, restoring function, and esthetics. This paper reports a 6-year follow-up case of an odontogenic myxoma treated with wide resection and mandibular bone reconstruction for posterior rehabilitation with dental implants.

Reflexões sobre ciência translacional: a experiência de 12 anos de um programa brasileiro de pós-graduação em Implantodontia / On the reflexions of translational science: the 12-year experience of a Brazilian post-graduate program on Implant Dentistry

Em 12 anos, o Programa de pós-graduação em Odontologia (área de concentração em Implantodontia) da UFSC desenvolveu ciência translacional através de três linhas de pesquisa: a) neoformação óssea peri-implantar; b) engenharia tecidual; e c) microbiologia aplicada à Implantodontia. Os resultados foram: a) factibilidade da proliferação de osteoblastos ser independente do tratamento ácido utilizado na descontaminação de implantes expostos à peri-implantite, criação de um novo modelo de cultura de células diretamente sobre implantes, contato osso/implante (BIC) incrementado com o uso de estímulos elétricos, neoformação óssea com aumento de densidade, espaços trabeculares menores e maior BIC para implantes imediatos com approach palatino; b) proliferação de fibroblastos estimulada pelo PRP ativado, estabelecimento de linhagem viável de fibroblastos gengivais humanos, proliferação de osteoblastos aumentada com PRP a 50%, determinação de linhagem viável de osteoblastos humanos, desenvolvimento de parafuso ósseo bovino para osteopromoção, ligamento periodontal como fonte alternativa viável de células progenitoras para uso em terapias com células-tronco, expansão mecânica de tecido conjuntivo para uso em enxertos subepiteliais, elaboração de arcabouços para estímulo da neoformação óssea, uso da sinvastatina como alternativa para promover a osteoindução, viabilidade de obtenção de células-tronco mesenquimais do saco pericoronário de dentes permanentes; e c) indício do uso de lactamas e nanopartículas de prata como potenciais agentes antibiofilmes e antimicrobianos. Coletivamente, estas três linhas de pesquisa fizeram a transição entre ciência e prática clínica, enfatizando a formação de docentes e a capacitação de novos pesquisadores.

Fatores que influenciam na fratura coronal em próteses totais fixas implantossuportadas / Factors affecting coronal fractures in implant-supported fixed prosthesis

Este artigo avaliou a prevalência e fatores clínicos relacionados com fratura coronal em próteses totais fixas implantossuportadas. Foram examinados 26 pacientes, portadores de 148 implantes osseointegrados e 264 unidades dentais em função. Os fatores analisados incluíram sexo, idade, número de unidades dentárias, localização, tempo em função e antagonista. Foi aplicado o teste estatístico qui-quadrado. Vinte e seis fraturas de coroa protética (9.85%) ocorreram em 10 pacientes (38.46%). A localização, o tempo em função e o antagonista foram os fatores relacionados com a maior prevalência de fraturas (p<0.05). Assim, as fraturas de coroa protética em próteses totais fixas implantossuportadas metaloplásticas estão relacionadas com região superior e anterior, menos de 5 anos em função e com próteses fixas implatossuportadas como antagonistas

This article has evaluated the prevalence and clinical factors related with coronal fractures in implant-supported fixed prosthesis. Twenty six patients were examined, with a total of 148 osseointegrated implants and 264 dental units in function. The analyzed factors included gender, age, number of dental units, positioning, time in function and antagonist. Chi-square test was applied for statistical analysis. Twenty six prosthetic crown fractures (9.85%) occurred in 10 patients (38.46%). Positioning, time in function and antagonist were the factors related with the highest prevalence of fractures (p<0.05). Prosthetic crown fractures in metalloplastic implant-supported fixed prosthesis are associated with anterior maxilla region, less than 5 years in function and antagonists being implant-supported fixed prosthesis

A new portable vibrator for plaster pouring: effect on the marginal fit at cylinder-abutment.

OBJECTIVE: The aim of this study was to test a new portable vibrator for plaster pouring (developed for this purpose), comparing the effect of its use on the accuracy of working cast of implant-supported restorations to the conventional vibrator. MATERIAL AND METHODS: From a master cast with 2 implants, 30 transfer moldings were made randomly and divided into three groups: group I (GI): pouring performed in an outsourced dental laboratory with conventional plaster vibrator (10 casts), group II (GII): pouring performed in the laboratory of the Federal University of Santa Catarina (UFSC) with conventional plaster vibrator (10 casts) and group III (GIII): pouring performed with the portable vibrator fabricated for this study (10 casts). The position of the analogue and marginal adaptation of the infrastructure were verified by testing the single screw on the master model and on the working model. The measurement of misfit was blindly performed with a precision microscope and analyzing unit, Quadra-Check 200. The data were statistically analyzed by analysis of variance (ANOVA) and the Holm-Sidak test (α=0.05). RESULTS: Means±standard deviations were as follows: GI: 19.19±4.73 µm; GII: 21.72±5.41 µm; GIII: 13.5±2.39 µm (P<0.05), with GIII significantly lower as compared to the other groups. CONCLUSION: Within the limitations of this study, it was concluded that a greater accuracy of working cast was achieved when a portable vibrator was used for casting molds.

A new portable vibrator for plaster pouring: effect on the marginal fit at cylinder-abutment

OBJECTIVE: The aim of this study was to test a new portable vibrator for plaster pouring (developed for this purpose), comparing the effect of its use on the accuracy of working cast of implant-supported restorations to the conventional vibrator. MATERIAL AND METHODS: From a master cast with 2 implants, 30 transfer moldings were made randomly and divided into three groups: Group I (GI): pouring performed in an outsourced dental laboratory with conventional plaster vibrator (10 casts), Group II (GII): pouring performed in the laboratory of the Federal University of Santa Catarina (UFSC) with conventional plaster vibrator (10 casts) and Group III (GIII): pouring performed with the portable vibrator fabricated for this study (10 casts). The position of the analogue and marginal adaptation of the infrastructure were verified by testing the single screw on the master model and on the working model. The measurement of misfit was blindly performed with a precision microscope and analyzing unit, Quadra-Check 200. The data were statistically analyzed by analysis of variance (ANOVA) and the Holm-Sidak test (α=0.05). RESULTS: Means±standard deviations were as follows: GI: 19.19±4.73 µm; GII: 21.72±5.41 µm; GIII: 13.5±2.39 µm (P<0.05), with GIII significantly lower as compared to the other groups. CONCLUSION: Within the limitations of this study, it was concluded that a greater accuracy of working cast was achieved when a portable vibrator was used for casting molds.

Moldagem de transferência e registro interoclusal: técnica diferenciada / Transfer molding and interocclusal record: differentiate technique

O sucesso da reabilitação oral depende de precisão tanto na moldagem quanto na montagem no articulador. Quando temos uma prótese em rebordo de extremidade livre, com grandes espaços edêntulos, a intercuspidação torna-se sujeita a erros e um registro estável e preciso da relação interoclusal é necessário. O objetivo desse artigo é apresentar uma técnica de moldagem de transferência que, ao unir os cilindros para a moldagem, já realizamos o registro interoclusal, obtendo o modelo de trabalho e o registro para o correto relacionamento entre os modelos no mesmo procedimento clínico. A técnica é conveniente, de fácil manuseio e garante bons resultados clínicos (como pode ser observado no resultado final), e poucos ajustes foram necessários para a finalização do trabalho protético

The success of oral rehabilitation depends on the accuracy, both in impression and cast mounting on an articulator. When we have prosthesis in the free end edge, with large edentulous spaces, intercuspation becomes subject to errors and a stable and accurate record of the interocclusal relationship is recquired. The aim of this paper is to present a implant impression technique that, while splinting the cylinders to prepare the impression already makes the interocclusal record, getting the working model and the record for the correct relationship between the models in the same clinical step. The technique is convenient, easy to use and provides good clinical results as observed in final results, requiring only few adjustments for the completion of the prosthetic work

Accident in implant dentistry: involuntary screwdriver ingestion during surgical procedure. A clinical report.

Although unusual, foreign body ingestion occurs in dentistry and may result in serious complications, such as intestinal perforation. The presence of the foreign body should be confirmed with the use of radiographs. The exam will allow the correct diagnosis and the treatment to be conducted according to the specific situation of the object in the gastrointestinal (GI) tract. The orientation of the patient as well as the awareness of the patient's medical history are key factors in preventing serious complications. Generally, instruments that enter the GI tract pass asymptomatically and atraumatically within 4 days to 2 weeks. Sometimes, a surgical approach is necessary to remove the instrument when there is bleeding, obstruction, or impaction in the GI tract. Thus, a correct diagnosis is vital to avoid unnecessary surgical interventions. The aim of this article is to report an accidental ingestion of a screwdriver by a patient who had previously undergone a hemi-mandibulectomy and its medical resolution.

Arcada dentária reduzida: conceitos e atualidades: revisão da literatura / Shortened dental archs: Concepts and current knowledge: literature review

Objetivos: evidenciar as vantagens e desvantagens do conceito de arcada dentária reduzida na reabilitação dos pacientes com prótese convencional e prótese sobre implantes, ampliando as opções de tratamento aos pacientes. Revisão de literatura: o conceito restaurador tradicional faz com que a dentição entre num ciclo de reparo permanente, mais de 50% dos trabalhos restauradores consistem no reparo de restaurações prévias. A arcada dentária reduzida tem sido estudada já há bastante tempo e há evidências que atestam a sua previsibilidade como opção nos tratamentos odontológicos. Discussão: a arcada dentária reduzida é indicada para simplificar o plano de tratamento, mas é importante considerar suas limitações em pacientes jovens, por terem um alto requerimento funcional, pacientes com mordida aberta anterior, pacientes com relação oclusal tipo Classe II e III severa, desgastes oclusais severos e pacientes bruxistas. Conclusão: o tratamento dentário visa manter a função natural da dentição durante a vida, incluindo as funções sociais e biológicas, como a auto-estima, estética, fonética, mastigação e conforto bucal. A filosofia da arcada dentária reduzida atende a todos esses requisitos, ampliando as opções de tratamento aos pacientes.

Aim: To highlight the advantages and disadvantages of the concept of shortened dental arch in the rehabilitation of a dentition with conventional and implant supported prosthesis, expanding treatment options to patients. Review: The traditional restorative concept makes the dentition a cycle of permanent repair, more than 50% of the restorative treatments consists on the repair of previous restorations. The shortened dental arch has been studied for some time and there is evidence that shows its predictability as an option in dental treatments. Discussion: The shortened dental arch is indicated to simplify the treatment plan, but it is important to consider their limitations in young patients that frequently have a high requirement for functionality, in patients with anterior open bite or with occlusal relationship type Class II and III, severe occlusal wear and in patients with bruxism. Conclusion: Dental treatment aims to maintain the natural function of the dentition during life, including social and biological functions, such as self-esteem, aesthetics, phonetics, chewing and oral comfort. The philosophy of the shortened dental arch meets all these requirements, expanding treatment options to patients.

Temporary implants for patients with low bone density of the upper maxilla: an alternative rehabilitation strategy.

BACKGROUND: The use of removable provisional prosthesis after implant placement is undesirable for many patients. In addition, removable prostheses place unfavorable pressure over implants during the healing period. PURPOSE: The use of temporary implants enable greater stability and functionality of the prostheses. MATERIALS AND METHODS: This clinical report shows the use of temporary implants in a low density maxilla in conjunction with a fixed provisional prosthesis. RESULTS: The temporary implants contributed to the support of the provisional fixed upper arch prosthesis and to patient comfort with a fixed prosthesis during the healing period. CONCLUSIONS: Fixed provisional prostheses are a potentially desirable alternative treatment strategy.

Resistance of three implant-abutment interfaces to fatigue testing

The design and retentive properties of implant-abutment connectors affect the mechanical resistance of implants. A number of studies have been carried out to compare the efficacy of connecting mechanisms between abutment and fixture. Objectives: The aims of this study were: 1) to compare 3 implant-abutment interfaces (external hexagon, internal hexagon and cone-in-cone) regarding the fatigue resistance of the prosthetic screw, 2) to evaluate the corresponding mode of failure, and 3) to compare the results of this study with data obtained in previous studies on Nobel Biocare and Straumann connectors. Materials and METHODS: In order to duplicate the alternating and multivectorial intraoral loading pattern, the specimens were submitted to the rotating cantilever beam test. The implants, abutments and restoration analogs were spun around their longitudinal axes while a perpendicular force was applied to the external end. The objective was to determine the force level at which 50 percent of the specimens survived 10(6) load cycles. The mean force levels at which 50 percent failed and the corresponding 95 percent confidence intervals were determined using the staircase procedure. RESULTS: The external hexagon interface presented better than the cone-in-cone and internal hexagon interfaces. There was no significant difference between the cone-in-cone and internal hex interfaces. Conclusion: Although internal connections present a more favorable design, this study did not show any advantage in terms of strength. The external hexagon connector used in this study yielded similar results to those obtained in a previous study with Nobel Biocare and Straumann systems. However, the internal connections (cone-in-cone and internal hexagon) were mechanically inferior compared to previous results.

Resistance of three implant-abutment interfaces to fatigue testing.

UNLABELLED: The design and retentive properties of implant-abutment connectors affect the mechanical resistance of implants. A number of studies have been carried out to compare the efficacy of connecting mechanisms between abutment and fixture. OBJECTIVES: The aims of this study were: 1) to compare 3 implant-abutment interfaces (external hexagon, internal hexagon and cone-in-cone) regarding the fatigue resistance of the prosthetic screw, 2) to evaluate the corresponding mode of failure, and 3) to compare the results of this study with data obtained in previous studies on Nobel Biocare and Straumann connectors. MATERIALS AND METHODS: In order to duplicate the alternating and multivectorial intraoral loading pattern, the specimens were submitted to the rotating cantilever beam test. The implants, abutments and restoration analogs were spun around their longitudinal axes while a perpendicular force was applied to the external end. The objective was to determine the force level at which 50% of the specimens survived 10(6) load cycles. The mean force levels at which 50% failed and the corresponding 95% confidence intervals were determined using the staircase procedure. RESULTS: The external hexagon interface presented better than the cone-in-cone and internal hexagon interfaces. There was no significant difference between the cone-in-cone and internal hex interfaces. CONCLUSION: Although internal connections present a more favorable design, this study did not show any advantage in terms of strength. The external hexagon connector used in this study yielded similar results to those obtained in a previous study with Nobel Biocare and Straumann systems. However, the internal connections (cone-in-cone and internal hexagon) were mechanically inferior compared to previous results.