Does the Use of Surface Electromyography Could Improve Quality of Life among Patients Rehabilitated by Mandibular Overdentures on Different Attachments?

Abstract Objective: To analyze and compare changes of quality of life parameter among dental patients rehabilitated by the implant-supported overdentures with different attachment systems. Material and Methods: Forty-eight patients were recruited as a study cohort. The implant placement procedure was based on the results obtained by CBCT scanning and individualized surgical templates manufactured for correct implant placement. Each individual received two k3Pro Implants (Sure Type with 4.0 or 4.5 mm in diameter) at the intraforaminal area due to standard protocol of implantation provided by the manufacturer under local anesthesia. All patients were distributed between two groups based on the fact of using either Locator- or ball-attachments. Rank correlation was measured using Spearman correlation coefficient, while linear correlation was evaluated by Pearson correlation coefficient. Results: No statistically meaningful differences were noted regarding patients' distribution among groups considering age (p>0.05) and gender (p>0.05). Provided patient-level analysis demonstrated that increase of conventional full denture service time was positively correlated with escalation of OHIP-EDENT scores. The most prominent inter-correspondences were noted specifically between longevity of denture service and elevation of scores within "Functional limitation" (r=0.61; p<0.05), "Physical pain" (r=0.51; p<0.05) and "Physical disability" (r=0.57; p<0.05) subdomains. No statistically argumented regressions were noted between increase tendency of OHIP-EDENT scores and gender (p>0.05) or age (p>0.05) parameters. Conclusion: Significant improvements of quality of life measured with OHIP-EDENT were noted for both types of attachments compared to the pre-treatment situation independently of additionally provided surface electromyography-based alignment.

Clinical and sociodemographic evaluation of peri-implant health of implant retained prostheses fabricated with an immediate oclusal loading protocol / Avaliação clínica e sociodemográfica da saúde peri-implantar de próteses retidas em implantes fabricadas com um protocolo de carga oclusal imediata

ABSTRACT Introduction Dental implant therapy, when well planned, can contribute to the patient's quality of life and is an important tool for solving a serious public health problem in various parts of the world. Objective This study investigated peri-implant health in fixed implants supported by an immediate loading technique and to associate those outcomes with sociodemographic conditions. Material and method After the disassembly of the prostheses on implants with the "Branemark Model" the peri-implant health of 93 patients was evaluated using dental plaque index (DPI), probing pocket depths (PPD), bleeding on probing (BOP), clinical attachment levels (CAL), and presence of gingival hyperplasia. Patients also answered a questionnaire about their gender, age, socioeconomic status (Brazilian Association of Research Companies - ABEP), general health and tobacco use. Result The most constant clinical findings were the presence of plaque, followed by gingival hyperplasia and periimplantitis, which was associated with disease progression. Most of the patients in the study were female, Caucasian, and under 60 years of age, with prostheses located in their lower arch, and they belonged to social classes A and B. Conclusion The presence of dental biofilm occurred in almost all implants and was not related to the presence of periimplantitis. The progression of periimplantitis with bone loss was related to sub gingival bleeding. The sociodemographic characteristics in the study did not present great correlations with the clinical variables of the dental implants studied.

RESUMO Introdução A terapia de implantes dentais, quando bem planejada, pode contribuir para a qualidade de vida do paciente e é uma ferramenta importante para solucionar um sério problema de saúde pública em várias partes do mundo. Objetivo Este estudo investigou a saúde peri-implantar em implantes fixos apoiados por uma técnica de carga imediata e associou esses resultados a condições sociodemográficas. Material e método Após a desmontagem das próteses sobre implantes com o "Modelo de Branemark", a avaliação peri-implantar de 93 pacientes foi avaliada por meio do índice de placa dental (IPD), profundidade de sondagem (PS), sangramento à sondagem (SS), níveis clínicos de fixação (NCF) e presença de hiperplasia gengival. Os pacientes também responderam a um questionário sobre sexo, idade, nível socioeconômico (Associação Brasileira de Empresas de Pesquisa - ABEP), saúde geral e tabagismo. Resultado Os achados clínicos mais constantes foram a presença de placa, seguida de hiperplasia gengival e periimplantite, que esteve associada à progressão da doença. A maioria dos pacientes do estudo era do sexo feminino, caucasiana e com idade inferior a 60 anos, com próteses localizadas na arcada inferior, pertencentes às classes sociais A e B. Conclusão A presença de biofilme dentário ocorreu em quase todos os implantes e não foi relacionado à presença de periimplantite. A progressão da peri-implantite com perda óssea foi relacionada ao sangramento subgengival. As características sociodemográficas do estudo não apresentaram grandes correlações com as variáveis clínicas dos implantes dentários estudados.

One-year prospective clinical study comparing patient satisfaction and masticatory performance of mandibular overdentures supported by one versus two implants

Abstract There is a lack of clinical evidence on mandibular overdentures (MOD) supported by a single implant. Objective: To compare patient satisfaction and masticatory performance in MOD supported by one versus two implants in a two-group parallel randomized clinical trial. Material and Methods: Twenty-one patients wearing new maxillary and mandibular complete dentures (CDs) were randomly divided to receive one (GI, n = 11) or two (GII, n = 10) implants in the mandibular arch. Four months after implant placement, o-ring abutments were installed in the implants, and matrix attachments were placed in the lower complete dentures. Patient satisfaction with their dentures and masticatory performance were compared at baseline, 3, 6, and 12 months after the procedure. Data on patient satisfaction were analyzed using the Friedman test and the Mann-Whitney U test. Data on masticatory performance were analyzed using one-way repeated measures analysis of variance (ANOVA) and Student's t test (α=0.05). Results: Both groups exhibited a significant increase in overall patient satisfaction in all periods evaluated (p<0.05), except for GI after 12 months, which had values similar to baseline (p=0.74). Satisfaction levels of GI and GII were similar at baseline, 3 and 6 months, but GII showed higher satisfaction levels (p=0.01) than GI at 12 months. GI and GII exhibited a significant increase (p<0.05) in masticatory performance for all periods relative to baseline. However, GII had higher masticatory performance with dentures than GI, regardless of the period (p<0.05). Conclusion: MOD supported by two implants demonstrated better patient satisfaction in the follow-up at 12 months and better masticatory performance than MOD supported by one implant.

Post-operative hemimaxillectomy rehabilitation using prostheses supported by zygoma implants and remaining natural teeth

OBJECTIVES: This study aimed to evaluate the stability of prostheses supported by zygoma implants and remaining teeth for subjects who had undergone hemi-maxillectomy. METHODS: Ten patients were included in the study. Oral rehabilitation was performed using a temporary prosthesis that was supported by remaining teeth for the first three months. Then, a zygoma implant was placed to provide support for a final prosthesis in addition to the remaining teeth. Each prosthesis was tailor-made according to biomechanical three-dimensional finite element analysis results. The patients were assessed using the prosthesis functioning scale of the Memorial Sloan-Kettering Cancer Center. In addition, retention and bite force were recorded for both the temporary prosthesis and the final prosthesis. RESULTS: The mean bite force of the prosthetic first molar was increased to 69.2 N. The mean retentive force increased to 13.5 N after zygoma implant insertion. The bite force on the prosthetic first molar was improved to 229.3 N. CONCLUSION: Bite force increased significantly with the support of a zygoma implant. The use of zygoma implants in the restoration of maxillary defects improved functional outcome and patient satisfaction.

Prevalence of peri-implant disease on platform switching implants: a cross-sectional pilot study

The objective of this study was to assess the prevalence of mucositis and peri-implantitis associated with the use of two types of implants—conventional versus platform switching after one year of loading. A longitudinal study of 64 implants in 25 patients was performed. Clinical variables, such as clinical pocket depth and bleeding upon probing, plaque, mobility, gingival recession, clinical attachment loss, and radiographic bone loss, were analyzed. The case definition for peri-implantitis was established as pockets of ≥ 5 mm with bleeding and bone loss ≥ 2 mm. One year after implant loading, the prevalence of mucositis and peri-implantitis with conventional implants (CIs) was 81.2% and 15.6%, respectively. For platform switching implants (PSIs) the prevalence was 90% and 6.6%, respectively. These differences were not statistically significant (p = 0.5375). However, there was a trend towards a lower prevalence of peri-implantitis with platform switching Implants.

Autopercepção da qualidade de vida associada à saúde bucal em idosos reabilitados com prótese total inferior tipo ôoverdentureõ / Self-perceived quality of life related to oral health in elderly patients rehabilitated with mandibular overdenture

O objetivo deste estudo foi o de relatar a autopercepção da qualidade de vida associada à saúde bucal em indivíduos idosos reabilitados com próteses totais inferiores implanto- -mucoso-suportadas (overdenture) pelo Projeto de Extensão Implante seu Sorriso vinculado ao Núcleo de Atenção ao Idosos (NAI) da UFPE no período de 2011 e 2012. A satisfação do paciente foi avaliada através de entrevista conduzida por meio do questionário OHIP Edent (Oral Health Impact Profile in Edentulus Adults) específico para esse fim. Da amostra participaram 10 idosos, com idade variando de 65 a 81 anos, sendo o maior número de participantes do sexo feminino (80%). Houve diferença significante do impacto na qualidade de vida avaliado pelo OHIP-EDENT. Esse impacto negativo diminuiu com a substituição das próteses totais removíveis inferiores convencionais por próteses implantorretidas tipo ôoverdentureõ, já que as respostas ônuncaõ ocorreram nos domínios: disfunção social (90%), incapacidade (85%), disfunção psicológica (70%). Concluiu-se, portanto, que a qualidade de vida associada à saúde bucal dos indivíduos idosos foi influenciada positivamente pela utilização de próteses totais implantorretidas tipo ôoverdentureõ, ou seja, houve melhora

The aim of this study was to report the self perceived quality of life related to oral health in elderly patients submitted to smile rehabilitation using overdentures. The patients have participated of the project ôImplant your Smileõ and were treated at the Federal University of Pernambuco between 2011 and 2012. The assessment of patient satisfaction was carried out using the Oral Health Impact Profile in Edentulus Adults questionnaire. A number of 10 patients with age between 65 and 81 years old have participated of the study and 80% of them were women. There was a significant difference regarding impact on quality of life waccording to the OHIP-EDENT. Based on the number of answers æneverÆ to the questions about: social dysfunction (90%), inability (80%) and psychological dysfunction (70%) it is possible to state that the replacement of mandibular dentures by implant supported overdenture has improved quality of life. We have concluded that the use o overdenture enhances quality of life related to oral health of elderly patients

Patient satisfaction concerning implant-supported prostheses: an observational study

The aim of this observational study was to assess the degree of patient satisfaction toward implant-supported prostheses. A questionnaire was used with two scales (one consisting of detailed adjectival and the other of numerical responses) regarding chewing, esthetics, speaking, comfort and overall satisfaction. The scales were administered to a sample of 147 patients treated with implants and prostheses. The data were submitted to the Kappa statistic and the Chi-square test to analyze the association between dependent and independent variables. High degrees of satisfaction (greater than 91%) were found for all categories evaluated, regardless of gender, age, number of implants or type of prosthesis. “Comfort” was associated significantly with the number of implants (p = 0.038), and “speaking” was associated significantly with the type of prosthesis (p = 0.029). Positive agreement was found between the scales for all categories evaluated, without statistically significant differences regarding respondent preference (p = 0.735). Patients treated with implant-supported prostheses were highly satisfied with the treatment.

Does the number of implants have any relation with peri-implant disease?

Objective: The aim of this study was to evaluate the relationship between the number of pillar implants of implant-supported fixed prostheses and the prevalence of periimplant disease. Material and Methods: Clinical and radiographic data were obtained for the evaluation. The sample consisted of 32 patients with implant-supported fixed prostheses in function for at least one year. A total of 161 implants were evaluated. Two groups were formed according to the number of implants: G1) ≤5 implants and G2) >5 implants. Data collection included modified plaque index (MPi), bleeding on probing (BOP), probing depth (PD), width of keratinized mucosa (KM) and radiographic bone loss (BL). Clinical and radiographic data were grouped for each implant in order to conduct the diagnosis of mucositis or peri-implantitis. Results: Clinical parameters were compared between groups using Student’s t test for numeric variables (KM, PD and BL) and Mann-Whitney test for categorical variables (MPi and BOP). KM and BL showed statistically significant differences between both groups (p<0.001). Implants from G1 – 19 (20.43%) – compared with G2 – 26 (38.24%) – showed statistically significant differences regarding the prevalence of peri-implantitis (p=0.0210). Conclusion: It seems that more than 5 implants in total fixed rehabilitations increase bone loss and consequently the prevalence of implants with periimplantitis. Notwithstanding, the number of implants does not have any influence on the prevalence of mucositis. .

A 3-year follow-up study of all-ceramic single and multiple crowns performed in a private practice: a prospective case series

OBJECTIVES: Zirconia-based prostheses are commonly used for aesthetic crown and fixed restorations, although follow-up data are limited, especially for implant-supported crowns. The aim of this study was to evaluate the threeyear clinical results of the installation of 463 zirconia core crowns by a general dental private practice. METHODS: This study followed 142 patients (69 men and 73 women; aged 28-82 years) who had received 248 single crowns (202 tooth-supported, 36 implant-supported) and 225 multiple units of up to six elements (81 toothsupported, 144 implant-supported). Clinical events, including fracture and loss of retention, secondary caries, and marginal integrity, were recorded. The overall failure rate was computed for the fractured and lost prostheses. Aesthetic, functional, and biological properties were rated, and patient satisfaction was investigated. RESULTS: During the three-year follow-up period, four patients were lost from the study (18 crowns, 4 percent of the total crowns). Three of the zirconia prostheses suffered fractures in more than three units (11 crowns; one- vs. three-year follow-up, p,0.05, Wilcoxon signed-rank test), and the cumulative prosthesis survival rate was 98.2 percent. Twelve units lost retention and were re-cemented, and no secondary caries of the abutment teeth were reported. The aesthetic, functional, and biological properties were generally well-rated, and there were no differences between tooth- and implant-supported crowns. The lowest scores were given regarding the anatomical form of the crowns, as some minor chipping was reported. Relatively low scores were also given for the periodontal response and the adjacent mucosa. Overall, patient satisfaction was high. CONCLUSIONS: At the three-year follow-up, the zirconia-core crowns appeared to be an effective clinical solution as they had favorable aesthetic and functional properties. Only the marginal fit of the prostheses should be improved upon.

Acompanhamento longitudinal das reabilitações sobre implantes mandibulares: análise do índice de satisfação dos pacientes e comportamento dos componentes e da prótese / Longitudinal follow-up of rehabilitations on mandibular implants:analysis of patient satisfaction rates and behavior of dentures and components

Objetivos: Analisar o comportamento dos implantes e das próteses dos casos tratados no aperfeiçoamento em Implantologia da Escola Instituto de Ensino, Aperfeiçoamento e Pesquisa em Odontologia do Mercosul, Porto Alegre, Rio Grande do Sul, Brasil, e avaliar a importância do acompanhamento. Métodos: Foram avaliados 29 pacientes com 120 implantes (Neodent Implantes Osseointegráveis, Curitiba, Brasil), com faixa etária média de 64 anos. As reabilitações foram próteses fixas mandibulares de arco total. O item de avaliação estatístico foi a quantidade de implantes em função sem mobilidade e o número de parafusos protéticos que se mantinham apertados após períodos que variaram entre 18 e 72 meses após a instalação das próteses. Resultados: A análise de sobrevivência revelou que 100% dos 120 implantes obtiveram sucesso e 85% dos parafusos das próteses mantiveram o aperto. Os resultados demonstraram que os implantes apresentam sucesso, independente do período em função e também independente de ser ou não prótese com carga imediata. No entanto, os parafusos protéticos não apresentam o mesmo índice de sucesso. O índice de satisfação dos pacientes com o tratamento foi de 82,75%. Conclusão: Com base nos dados obtidos, é possível concluir que o acompanhamento dos casos é um procedimento clínico muito importante para a manutenção do sucesso alcançado

Objectives: Analyze the behavior of implants and dentures of cases treated at the dental implant improvement center of the Instituto de Ensino, Aperfeiçoamento e Pesquisa em Odontologia do Mercosul school, Porto Alegre, RS, Brazil, and to evaluate the importance of long-term follow-up. Methods: Twenty nine patients with a mean age of 64 years, and 120 implants (Neodent Implantes Osseointegráveis, Curitiba, Brasil) were evaluated. The rehabilitations were mandibular complete fixed dentures. The evaluation item used in the Kaplan-Meier survival statistic analysis was the number of implants in function with no mobility (success) and the number of prosthetic screws that remained tight after periods ranging from 18 to 72 months of the prostheses in mouth. Results: The survival analysis revealed that 100% of 120 implants were successful and 85% of the screws remained tightly fastened. The results showed that the implants were successful irrespective of the period in function and irrespective of whether or not the dentures received immediate load; however, the screws did not show the same success rate, since loosening occurred in the course of time. The patient rate of satisfaction with the treatment was 82.75%. Conclusion: Based on the data it was concluded that long-term follow-up is a very important clinical procedure for maintaining the success achieved.

Implantología oral: prótesis inmediata individual: estudio prospectivo multicéntrico en 100 implantes; resultado a 7 años / Oral implantology: seven year results of 100 cases in a prospective multicentric study of single tooth immediate restoration

Se presentarán los resultados de un estudio clínico multicéntrico de tres centros clínicos que realizaron prótesis inmediata individual sobre implantes en sector anterior y posterior, con una evolución de 7 años (5 años promedio), con un número de 100 casos clínicos con implantes de diferentes marcas. El 63 por ciento de la población es de sexo femenino y el 37 por ciento de sexo masculino (Fig. 1), con una edad promedio de 50 años de funcionamiento de +/- 5 años. La incidencia de tabaquismo es del 27 por ciento de los casos, todos ellos fumadores de hasta 10 cigarrillos (Fig. 2). Se evaluarán las distintas variables clínicas de aplicación, así como también las modificaciones tecnológicas actuales.

Qualidade de vida associada à saúde bucal em portadores de próteses totais convencionais e implantorretidas: relato de dois casos / Oral health-related quality of life in conventional and implant-retained complete denture wearers: two case reports

O termo qualidade de vida associada à saúde bucal (QVSB) tem sido adotado para definir medições de como o paciente percebe as suas próprias condições bucais. O objetivo deste estudo foi relatar a autopercepção da QVSB de dois portadores de próteses totais convencionais ou implantorretidas. Uma entrevista foi conduzida com dois pacientes por meio de um questionário baseado no OHIP-EDENT, com respostas em formato aberto. Um deles portava uma overdenture mandibular com prótese total convencional maxilar e o outro, um par de próteses fixas. Evidenciou-se que as próteses totais sobre implantes restauraram efetivamente o conforto físico e psicossocial. Limitações relativas ao tratamento foram percebidas, como a retenção de alimento sob próteses fixas, apesar de não infuenciarem a QVSB de forma pronunciada. Concluiu-se que, do ponto de vista subjetivo, o uso de prótese total ancorada sobre implantes mostrou-se como uma excelente modalidade de tratamento, apesar de os resultados variarem grandemente em função das necessidades percebidas pelo paciente.

The term oral health-related quality of life (OHRQoL) has been employed for the measurement of subjective parameters of oral conditions. In other words, those parameters are based on self-perception of the patients. The aim of this study was to relate the self-perception by the OHRQoL for conventional and implant-retained complete dentures from two edentulous patients. An interview was conducted by using open format questions similar to those of the OHIP-EDENT inventory. Prosthetic status of the patients comprised (I) a conventional maxillary complete denture and a mandibular overdenture and (II) bimaxillary fixed complete dentures. According to the reports, implant-retained complete dentures restored physical and psycho-social comfort. Functional limitations, i.e. food retention under the denture bases, were perceived but did not infuence the quality of life on a pronounced manner. Although the results have widely changed due to the different perceived needs by the patients, it was concluded that implant-retained prostheses are an excellent modality of treatment for edentulous people.

Manutenção em implantes dentários / Maintenance in dental implants

A manutenção em implantes é um fator decisivo para a obtenção de sucesso quando se utiliza overdenture e próteses sobre implantes. Neste trabalho, apresenta-se um caso clínico de um paciente do gênero masculino, 70 anos, leucoderma, com rebordo inferior desdentado total, reabsorção óssea grave, com presença apenas de osso basal e ausência de vestíbulo. O tratamento consistiu em instalação de overdenture inferior, inicialmente sobre três implantes na região anterior interforames, sendo que o implante esquerdo transfixou no osso basal de 2 a 3 milímetros; onze anos mais tarde, foram instalados mais dois implantes e foi confeccionada uma carga imediata até os primeiros molares para a colocação de uma prótese fixa implanto-suportada. Durante todo o tratamento foi realizada uma manutenção meticulosa, com acompanhamento por 14 anos, interrompida pelo óbito do paciente. A partir do terceiro mês após a abertura dos três implantes inicialmente instalados, observou-se a presença de mucosa ceratinizada, definição do vestíbulo, maturação do rebordo e formação de osso na região mentual. Conclui-se que um bom planejamento, aliado ao domínio da técnica e uma manutenção adequada, foram pré-requisitos necessários à obtenção de resultados favoráveis, ao sucesso do caso e à obtenção de uma melhor qualidade de vida pelo paciente.

In implants, maintenance is a decisive factor for obtaining success when implant supported overdentures and dentures are used. The present stud presents, a clinical case of a patient, a 70 year-old white man, with a completely edentulous mandibular alveolar ridge, severe bone resorption with presence of basal bone only, and absence of vestibule. Initially, treatment consisted of the placement of a mandibular overdenture, supported on three implants in the anterior inter-foramen region, as the left implant was transfixed in the basal bone of 2 to 3 millimeters. Eleven years later, another two implants were placed in the anterior area and an immediate load was performed up to the first molars, for the placement of an implant supported fixed. Throughout the entire treatment, meticulous maintenance was carried out, with follow-up for fourteen years, interrupted by the patient's death. From the third month after the opening the three implants initially placed, the presence of keratinized mucosa, definition of the vestibule, maturation of the alveolar ridge and bone formation in the mento region were observed. It was concluded that good planning, allied to mastery of the technique and adequate maintenance were the prerequisites necessary for obtaining favorable results, success of the present case, and for the patient to have a better quality of life.

Exodontia múltipla preventiva e instalação de implantes cônicos, utilizando a técnica de múltiplas incisões circulares na preservação do rebordo alveolar e obtenção de perfil gengival estético / Preventive multiple extraction and installation of conical implants, using the technique of multiple circular incisions for the preservation of the alveolar rim and attachment of aesthetic profile gingival

Atualmente os implantes bucais são parte importante na reabilitação bucal, sendo que cada vez mais pacientes e profi ssionais optam por esta modalidade de tratamento. O presente trabalho relata um caso clínico, no qual através de um planejamento detalhado, foram feitas preventivamente as extrações dos elementos dentais remanescentes da maxila, por estarem comprometidos devido a perda óssea generalizada e doença periodontal crônica com mobilidade graus II e III. Após a instalação de nove implantes cônicos foi fi xada uma prótese provisória de arco total aparafusada, sendo a mesma ferulizada parcialmente em estrutura de titânio, soldada a laser e revestida em resina acrílica termopolimerizável. As incisões conservadoras, realizadas com punch durante a cirurgia para instalação dos implantes, permitiram um melhor contorno mucosal, tempo cirúrgico menor devido à ausência de suturas, maior estabilidade dimensional dos tecidos duros e moles devido à ausência de retalho mucoperiostal. A instalação de implantes cônicos favoreceu a estabilização primária dos mesmos em osso de baixa densidade, o que possibilitou a aplicação de carga imediata, reduzindo o tempo de tratamento e a perda óssea, devolvendo, assim, a auto-estima da paciente e melhorando a sua interação social.