Impact of splinting implant-supported crowns on the performance of adjacent posterior implants: A systematic review and meta-analysis.

STATEMENT OF PROBLEM: While rehabilitation with implant-supported crowns in the posterior region is widely practiced, guidance on clinical considerations when choosing between splinted or nonsplinted implant-supported crowns is limited. PURPOSE: The purpose of this systematic review with meta-analysis was to assess whether adjacent implants with internal connections in the posterior region should be treated with splinted or nonsplinted crowns. MATERIAL AND METHODS: The systematic review was registered on the prospective register of systematic reviews (PROSPERO) under the code, CRD42021248525. Two authors searched 4 electronic databases (PubMed, Cochrane Library, Scopus, and Web of Science) independently for articles published up to December 2023. Additionally, a hand search was conducted in the nonpeer-reviewed literature and the reference lists of included articles. Only clinical studies comparing splinted and nonsplinted hexagonal or conical internal connection adjacent implants in the posterior region were considered. A single-arm meta-analysis was conducted using RevMan. Risk of bias and quality were assessed using the Cochrane Collaboration's Tool for Assessing Risk and the Newcastle-Ottawa scale. RESULTS: Qualitative synthesis included 17 studies, and quantitative synthesis involved 13 studies. A total of 2085 implants (1244 splinted and 841 nonsplinted) were inserted in 1027 participants, with observation times ranging from 5 months to 16 years. Thirteen studies related the type of crown retention (cemented or screw-retained). Only 2 studies related annual bone loss results considering the type of crown retention, but whether they were splinted or nonsplinted crowns and significant differences were not specified. The meta-analysis revealed no statistical differences between splinted and nonsplinted implants for biological complications (P=.95, I2=0%). However, the nonsplinted implants exhibited significantly more mechanical complications than the splinted implants (P<.001, I2=1%, RR 0.37; 95% IC [0.26-0.54]). The studies included demonstrated a low risk of bias and were of good quality. CONCLUSIONS: Splinting was not found to affect the incidence of biological complications in posterior adjacent implants. However, more mechanical complications occurred in nonsplinted crowns than splinted ones.

Impact of CAD/CAM burs lifetime on surface properties of dental zirconia: Implications for biocompatibility of custom abutments.

OBJECTIVE: To evaluate the effect of the deterioration of computer aided design/computer aided manufacturing (CAD/CAM) burs during zirconia milling, on surface roughness, contact angle, and fibroblast viability. MATERIALS AND METHODS: Ceramic blocks were milled and 75 ceramic disks (8 × 1.5 mm) made and allocated into three groups (n = 25): G1-brand new 2L and 1L burs, G2-2L bur at the end of lifetime and brand new 1L bur and G3-both burs at the end of their lifetimes. Roughness (Ra, Rq, and Rz) was evaluated using a 3D optical profilometer, the contact angle by the sessile drop method and the cell viability of the mouse NIH/3T3 fibroblast, using the Alamar Blue assay at intervals of 24, 48, and 72 h (ISO 10993-5). Data were analyzed by one-way ANOVA and Kruskal-Wallis tests (p ≤ 0.05). RESULTS: Roughness increased as the burs deteriorated and G3 (0.27 ± 0.04) presented a higher value for Ra (p < 0.001). The highest contact angle was observed in G3 (86.2 ± 2.66) when compared with G1 (63.7 ± 12.49) and G2 (75.3 ± 6.36) (p < 0.001). Alamar Blue indicated an increase in cell proliferation, with no significant differences among the groups at 24 and 72 h (p > 0.05). CONCLUSIONS: The deterioration of the burs increased the surface roughness and decreased the wettability, but did not interfere in cell viability and proliferation. CLINICAL SIGNIFICANCE: The use of custom zirconia abutments represents an effective strategy for single crowns restorations. Our findings suggest that these abutments can be efficiently milled using CAD/CAM burs within their recommended lifetime.

Confecção de guia multifuncional para planejamento de reabilitação implantossuportada: relato de caso / Preparation of a multifuncional guide for the planning of implant-supported rehabilitations: case report / Elaboración de una guía multifuncional para la planificación de rehabilitación implantosoportada: informede caso

Introdução:Em busca da estética e da função mastigatória,é cada vez mais crescente aprocurapor reabilitações implantossuportadas. O guia multifuncional surgepara orientar a disponibilidade óssea e contribuir no planejamento da instalação tridimensional dos implantes, seguindo os princípios do planejamento reverso.Objetivo:Descrever, por meio de um caso clínico, a possibilidade de obtenção de resultados de excelente previsibilidade em coroas unitárias implantossuportadas, por meio do uso de guias multifuncionais, no planejamento do início ao fim de tratamento.Relato decaso:Paciente A.M.F, 44 anos, sexo feminino, compareceu à clínica de Prótese dentária do Departamento de Odontologia/UFRN com queixa de insatisfação da sua prótese removível e harmonia do sorriso. Ao exame clínico e radiográfico, observou-se ausência do elemento 12, apresentando um espaço interoclusal de 5mm e distância médio-distal de 7mm. Foi confeccionado o guia em resina acrílica, o qual foi preenchido o espaço desdentado com um dente de estoque. Em seguida, o dente deste guia teve seu centro perfurado com uma broca esférica para peça reta na região de cíngulo e com isso, preenchida com guta percha em bastão. Após isso, o paciente foi encaminhado para realizar uma tomografia computadorizada cone beam com o guia multifuncional em posição.As imagens obtidas permitiram o planejamento para instalação do implante, como inclinação e posicionamento favorável, bem como ausência de disponibilidade óssea na região. Além disso, o guia funcionou em outras etapas do tratamento da paciente, como na fase provisória.Conclusão:Os guias auxiliam em diversas fases do tratamento e permitem maior previsibilidade dos resultados em reabilitações protéticas unitárias implantossuportadas, apresentando-se como um dispositivo promissorpara ocorreto posicionamento do implante (AU).

Introduction:In search of esthetics and improved masticatory function, the demand for implant-supported rehabilitation is increasing. Multifunctional guides emerge to assess bone availability and help plan the three-dimensional installation of implants, following the principles of reverse planning. Objective:To describe, through a clinical case, the possibility of obtaining excellent predictability in implant-supported single crowns, through the use of multifunctional guides, inthe planning of a treatment from beginning to end. Case report:Patient A.M.F, 44 years old, female, came to the Prosthodontics clinic at the Department of Dentistry/UFRN complaining of dissatisfaction with her removable prosthesis and the harmony of her smile. Clinical and radiographic examination revealed the absence of element 12, with an interocclusal space of 5mm and a mid-distal distance of 7mm. The acrylic resin guide was made and the edentulous space was filled with a stock tooth. The center of theguide tooth was then drilled with a spherical straight-bit burr in the cingulum region and filled with gutta-percha stick. The patient was then referred for a cone beam computed tomography with the multifunctional guide in position. The images obtained allowed planning for implant installation, such as favorable inclination and positioning, as well as the absence of bone availability in the region. In addition, the guide was effective during other stages of the patient's treatment, such as the provisional phase.Conclusion:The guides assist in various phases of treatment and allow greater predictability of results in implant-supported single prosthetic rehabilitations, presenting themselves as a promising device for correct implant positioning (AU).

Introducción:En busca de estética y función masticatoria, la demanda de rehabilitaciones implantosoportadas es cada vez mayor. La guía multifuncional hasurgido para orientar la disponibilidad ósea y ayudar a planificar la instalación tridimensional de implantes, siguiendo los principios de la planificación inversa. Objetivo: Describir, a través de un caso clínico, la posibilidad de obtener una excelente predictibilidad en coronas unitarias implantosoportadas, mediante el uso de guías multifuncionales, en la planificación desde el início hasta el final del tratamiento. Informe de caso: Paciente A.M.F, 44 años, sexo femenino, compareció a la clínica de Prostodoncia del Departamento de Odontología/UFRN quejándose estar insatisfecha con su prótesis removible y con la armonía de su sonrisa. El examen clínico y radiográfico reveló la ausencia del elemento 12, con un espacio interoclusal de 5 mm y una distancia medio-distal de 7 mm. Se confeccionó una guía de resina acrílica y se rellenó el espacio edéntulo con un diente provisorio. A continuación, se perforó el centro del diente guía con una broca recta esférica en la región del cíngulo y se le rellenó con gutapercha en barra. Posteriormente, el paciente fue remitido a una tomografía computarizada cone beamcon la guía multifuncional en posición. Las imágenes obtenidas permitieron planificar la instalación del implante, como inclinación y posicionamiento favorables, así como la ausencia de disponibilidad ósea en la región. La guía también funcionó en otras fases del tratamiento del paciente, como en la fase provisional. Conclusión:Las guías ayudan en varias fases del tratamiento y permiten una mayor previsibilidadde los resultados en rehabilitaciones protésicas unitarias implantosoportadas, presentándose como un dispositivo prometedor para el correcto posicionamiento de los implantes (AU).

O condicionamento de tecido peri-implantar na reabilitação estética de próteses unitárias sobre implantes: relato de caso clínico / Peri-implant tissue conditioning in the esthetic rehabilitation of unitary prostheses on implants: Clinical case report / Acondicionamiento del tejido periimplantario en la rehabilitación estética de prótesis unitarias sobre implantes: Informe de caso clínico

Introdução:A reabilitação protética implantosuportada de espaços edêntulos na região do sorriso é um desafio para o cirurgião-dentista. Para obtenção da estética em próteses unitárias sobre implante é necessário considerar aspectos como o correto posicionamento do implante e sua harmonia com os tecidos moles e duros. Objetivo:relatar o resultado estético e funcional de um tratamento com auxílio de coroa provisória associada ao condicionamento gengival na reabilitação final com coroa unitária implantossuportada. Relato de caso clínico: Paciente MJFA, 36 anos, sexo feminino, compareceu à clínica de Prótese Dentária do Departamento de Odontologia/UFRN queixando-se de trauma dentário com perda do elemento dentário 15 e necessidade de "ficar com sorriso mais bonito". Após instalação de implante com conexão cônica e período de osseointegração, foi realizada a confecção da coroa provisória sobre implante e iniciada sessões de condicionamento gengival por meio de acréscimos com resina acrílica, utilizando a técnica de pressão gradual sob a margem gengival. Observou-se uma melhora no tecido periimplantar e um perfil de emergência adequado. O caso possui proservação de 3 anos. Conclusões:a realização de condicionamento gengival previamente a prótese final é uma etapa importante para alcançar umareabilitação com característicasestéticas e funcionais semelhantes à de dentes naturais (AU).

Introduction:Implant-supported prosthetic rehabilitation of edentulous spaces in the smile areais a challenge for dental surgeons. To achieve pleasing esthetics in single implant prostheses it is necessary to consider aspects such as the correct positioning of the implant and its harmony with the soft and hard tissues.Objective:to report the esthetic and functional results of a treatment with the aid of a provisional crown associated with gingival conditioning in the final rehabilitation with a single implant-supported crown.Clinical case report:Patient MJFA, 36 years old, female, attended the Prosthodonticsclinic of the Department of Dentistry/UFRN complaining of dental trauma with loss of tooth 15 and the need to "havea more beautiful smile". Afterinstalling an implant with a conical connection and a period of osseointegration, a temporary crown was made on the implant and gingival conditioning sessions were initiatedby means of acrylic resin augmentations, using the gradual pressure technique under the gingival margin. An improvement in the peri-implant tissue and an adequate emergenceprofile were observed. The case has a 3-year follow-up period.Conclusions:performing gingival conditioning prior to the final prosthesis is an important step in achieving rehabilitation with esthetic and functional characteristics similar to those of natural teeth (AU).

Introducción: La rehabilitación protésica implantosoportada de espacios edéntulos en el áreade la sonrisa es un desafío para el cirujano dentista. Para conseguir una buena estética en las prótesis unitarias sobre implanteses necesario tener en cuentaaspectos como el posicionamiento correctodel implante y su armonía con los tejidos blandos y duros.Objetivo: informar losresultadosestéticosy funcionalesde un tratamiento con ayuda de coronas provisionales asociado al acondicionamiento gingival en la rehabilitación final con corona única implantosoportada.Relato de caso clínico: Lapaciente MJFA, 36 años, sexo femenino, se dirigióa la clínica de Prostodonciadel Departamento de Odontología/UFRN quejándose de un traumatismodental con pérdida del diente 15 y de la necesidad de "tener una sonrisa más bonita". Después de la colocación de un implante con conexión cónica y de un período de osteointegración, se realizó una corona provisional sobre el implante y se iniciaron sesiones de acondicionamiento gingival con aumentos de resina acrílica, utilizando la técnica de presión gradual bajo el margen gingival. Se observó una mejora del tejido periimplantario y un perfil de emergencia adecuado. El caso tiene un seguimiento de 3 años. Conclusiones: el acondicionamiento gingival previo a la prótesis definitiva es una etapaimportante para conseguiruna rehabilitación con características estéticas y funcionales similares a las de los dientes naturales (AU).

Microbiological analysis of oral biofilms in patients admitted to intensive care unit: Pilot study.

AIM: To identify Pseudomonas aeruginosa and Staphylococcus aureus in oral biofilms of intubated and non-intubated patients admitted to an Intensive Care Unit (ICU). METHODS: This was a cross-sectional study, with 30 biofilm sites sampled. S. aureus and P. aeruginosa were identified by conventional biochemical assays. Antimicrobial susceptibility was tested by disk-diffusion. RESULTS: Of 30 sites, 50% contained P. aeruginosa and 3.33% S. aureus. P. aeruginosa was detected in similar amounts in all 3 sample sites, with 5 colonized sites (50%). S. aureus colonized a single supragingival site (3.33%). There was resistance to multiple antimicrobial agents of P. aeruginosa in 7 sites (100%) and S. aureus in 1 (100%). CONCLUSIONS: This study revealed an important relationship between P. aeruginosa and S. aureus colonization at supragingival, subgingival and lingual sites and intubation, thus revealing antimicrobial resistant bacteria colonization of medical interest, which may contribute to the therapy choice directed to these microorganisms.

Impact of orthognathic surgery on the treatment of gummy smile: an integrative review.

The gingival smile is considered unpleasant and can be treated in different ways according to its etiological factor. When caused by maxillary vertical growth excess, orthognathic surgery may be indicated to correct the vertical excess. The aim of this integrative review was to evaluate the impact of orthognathic surgery on the treatment of gingival smile. An electronic search was performed of the PubMed/Medline, Cochrane Library, Scopus, and Google Scholar databases. The selection of studies was performed by two blinded reviewers. Firstly, studies were selected by reading the titles and the abstracts of articles. The references from each study selected were then searched to find articles that were not found in the electronic search. After reading the full-text articles, studies that met the inclusion criteria were selected. A total of 667 studies were identified, but only 19 were selected for the integrative review after applying the inclusion and exclusion criteria. The selected articles reported maxillary impaction from 2 to 10 mm, but this amount of superior repositioning of maxilla does not appear to be related to the initial gingival exposure described. Orthognathic surgery is not the first choice of treatment for gingival smile, but it appears to be a suitable therapy for other conditions in the same patient for improving a gummy smile by correction of gingival exposure.

Avaliação da qualidade da assistência em saúde bucal para prevenção e tratamento da mucosite oral em pacientes submetidos ao transplante de células-tronco hematopoiéticas / Assessment of the quality of oral health care for the prevention and treatment of oral mucositis in patients undergoing hematopoietic stem cell transplantation

Introdução: A mucosite oral (MO) é uma inflamação da mucosa oral, bastante prevalente em pacientes submetidos ao Transplante de Células-Tronco Hematopoiéticas (TCTH), sendo uma das principais complicações associadas. A terapia de fotobiomodulação (FBM) tem sido proposta devido à sua ação preventiva e terapêutica para MO. Objetivo: Avaliar a qualidade da assistência em saúde bucal por meio do processo e resultado na prevenção e tratamento da MO em pacientes submetidos ao TCTH. Materiais e métodos: Estudo observacional descritivo, prospectivo e de avaliação de qualidade em saúde, adequado conforme o Squire 2.0. A amostra foi constituída por trinta e seis pacientes que receberam tratamento odontológico prévio e FBM como protocolo preventivo de mucosite oral. Quando diagnosticados com mucosite, os pacientes receberam FBM terapêutico. Os pacientes foram acompanhados e avaliados durante o regime de condicionamento (T0), um dia pós-TCTH (T1), com 5 dias pós-TCTH (T2) e com 10 dias pós-TCTH (T3). Para avaliar o processo foram utilizados os seguintes indicadores: Terapia baseada em evidências, Avaliação e registro dos sintomas em todas as visitas, Cuidado preventivo com FBM durante a internação e Plano terapêutico para irrupção de sintomas e agravamentos. Os indicadores de resultados foram expressos em percentuais, sendo eles, o Percentual de indivíduos que desenvolveram: MO; MO de acordo com a gravidade; Dor; Dor severa, leve e/ou moderada; Alterações bucais; MO segundo o sexo; MO em indivíduos leucopênicos. Acrescido de percentual de indivíduos que utilizaram analgésicos durante a terapia; Redução da dor; Presença de outro tratamento associado; Indivíduos com comorbidades que desenvolveram MO e Indivíduos com transplante autólogo e alogênico que desenvolveram MO. Realizou-se análise descritiva e estatística dos indicadores através do teste não-paramétrico de Wilcoxon e do Quiquadrado com nível de significância de 5%. Resultados: Para o processo, observou-se que em todos os indicadores, 100% da amostra obtiveram assistência dentro do padrão desejável. Os indicadores do resultado mostraram que 66,6% dos pacientes apresentaram Mucosite Oral em pelo menos um tempo de acompanhamento, com aumento estatisticamente significativo entre os tempos T1 e T2, como também entre os tempos T1 e T3 (p<0.05), com predominância do grau I (p = 0.014). Quatro pacientes (16,7%) referiram dor, tanto no T2 quanto no T3, com aumento estatisticamente significativo entre T1 e T2 (p<0.05), sendo a dor moderada a mais observada, sem relatos de dor severa. Na avaliação da contagem leucocitária, pode-se observar que no período em que os pacientes apresentaram maior número de mucosite oral (T2 e T3), exibiram quadros de leucopenia, porém sem diferenças estatisticamente significativas (p>0,05). A MO não teve associação estatisticamente significativa com a dor, tratamento associado, leucopenia, comorbidades e o tipo de transplante, apresentando para o sexo feminino (p=0.015). Para a redução da dor não houve associação estatisticamente significativa. Conclusão: Os resultados apresentados exibiram excelentes indicadores de processo utilizados para a avaliação da qualidade da prestação do serviço em saúde. Os resultados dos protocolos da fotobiomodulação demonstraram que, apesar de ainda haver o desenvolvimento de MO nesses pacientes, houve predomínio do grau I, com menor gravidade da MO bem como da dor associada (AU).

Introduction: Oral mucositis (OM) is an inflammation of the oral mucosa, quite prevalent in patients undergoing Hematopoietic Stem Cell Transplantation (HSCT), contributing to the interruption of antineoplastic treatment. Photobiomodulation therapy (PBM) has been proposed due to its preventive and therapeutic action for OM. Objective: To evaluate the quality of oral health care through the process and result in the prevention and treatment of OM in patients undergoing HSCT. Materials and methods: Observational, descriptive, prospective and health quality assessment study, appropriate according to Squire 2.0. The sample consisted of thirty-six patients who received previous dental treatment and PBM as a preventive protocol for oral mucositis. When diagnosed with mucositis, patients received therapeutic PBM. The patients were followed up and evaluated during the conditioning regime (T0), one day after HSCT (T1), with 5 days after HSCT (T2) and with 10 days after HSCT (T3). The following indicators were used to evaluate the process: Evidence-based therapy, Assessment and recording of symptoms at all visits, Preventive care with PBM during hospitalization and Therapeutic plan for the outbreak of symptoms and worsening. The result indicators were expressed in percentages, being the Percentage of individuals who developed: OM; OM according to gravity; Ache; Severe, mild and / or moderate pain; Oral changes; OM according to sex; OM in leukopenic individuals. Plus percentage of individuals who used painkillers during therapy; Pain reduction; Presence of another associated treatment; Individuals with comorbidities who developed OM and Individuals with autologous and allogeneic transplants who developed OM. Descriptive and statistical analysis of the indicators was performed using the non-parametric Wilcoxon test and the Chisquare test with a significance level of 5%. Results: For the process, it was observed that in all indicators, 100% of the sample obtained assistance within the desirable standard. Result indicators showed that 66.6% of patients had Oral Mucositis in at least one follow-up period, with a statistically significant increase between times T1 and T2, as well as between times T1 and T3 (p <0.05), with a predominance grade I (p = 0.014). Four patients (16.7%) reported pain, both at T2 and T3, with a statistically significant increase between T1 and T2 (p <0.05), with moderate pain being the most observed, with no reports of severe pain. In the evaluation of the leukocyte count, it can be observed that in the period in which the patients had a greater number of oral mucositis (T2 and T3), they exhibited leukopenia, but without statistically significant differences (p> 0.05). OM had no statistically significant association with pain, associated treatment, leukopenia, comorbidities and the type of transplant, presenting for females (p = 0.015). There was no statistically significant association for pain reduction. Conclusion: The results presented showed excellent process indicators used to assess the quality of health service provision. The results of the photobiomodulation protocols demonstrated that although there is still the development of OM in these patients, there was a predominance of grade I, with less severity of OM as well as associated pain (AU).