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1.
Materials (Basel) ; 16(13)2023 Jun 22.
Article in English | MEDLINE | ID: mdl-37444846

ABSTRACT

E. faecalis has been associated with bacteremia, sepsis, and bacterial endocarditis and peri-implantitis. This microorganism can remain in the alveolus even after extraction of the root remnant. This study aimed to evaluate the corrosion on different surfaces of commercially pure titanium (Ti) grade 4 (Ticp-G4) as a function of the bacterial biofilm effect of Enterococcus faecalis. A total of 57 discs were randomly divided according to their surface finish (n = 19). For microbiological analysis (n = 9), the discs were placed in 12-well plates containing E. faecalis culture and incubated at 37 °C for 7 days. The results show that for the intergroup analysis, considering the "electrolyte" factor, there was a difference between the groups. There was greater biofilm formation for the D.A.Zir group, with greater electrochemical exchange for Biofilm, and the presence of biofilm favored greater electrochemical exchange with the medium.

3.
PLoS One ; 14(10): e0223148, 2019.
Article in English | MEDLINE | ID: mdl-31639129

ABSTRACT

The aim of this research was to evaluate the efficacy of a commercial sealing agent at the abutment/implant interface against microleakage of single and dual-species biofilms of Candida albicans and Enterococcus faecalis into external hexagon (EH) and Morse taper (MT) prosthetic connections. A total of 216 samples of implants and their abutments were tested. Six groups (n = 36) were evaluated based on biofilm and period of incubation (7 and 14 days). The implant connections EH and MT (n = 18) were divided according to the use of the material (n = 9) (EH-T and MT-T: with the sealing agent; EH-C and MT-C: control). The biofilms were analyzed by microbial counting (CFU/mL) and SEM analysis and photographs of the material in the screw joints were also taken. Data were analyzed by Student t test, two-way ANOVA and Bonferroni test. For the single-species biofilms, there was a significant reduction in the growth of E. faecalis when compared MT-C and MT-T or EH-C and EH-T at 7 and 14 days. The same was observed for C. albicans biofilms. For dual-species biofilms of E. faecalis and C. albicans, the sealing agent was more effective in preventing microbial infiltration into the MT connection at 14 days, while microbial infiltration did not occur into EH connections even in absence of the sealing agent for both periods of evaluation. Overall, these data suggest that the presence of the sealing agent reduces or eliminates the microleakage of E. faecalis and C. albicans biofilms into the implants regardless of the period of incubation.


Subject(s)
Bone Screws/microbiology , Candida albicans/drug effects , Dental Materials/pharmacology , Enterococcus faecalis/drug effects , Biofilms/growth & development , Bone Screws/adverse effects , Candida albicans/growth & development , Candida albicans/pathogenicity , Dental Abutments/microbiology , Dental Implants/microbiology , Dental Stress Analysis , Enterococcus faecalis/growth & development , Humans , Materials Testing/methods , Titanium/chemistry , Titanium/therapeutic use
4.
Araçatuba; s.n; 2019. 78 p. ilus, graf.
Thesis in Portuguese | BBO - Dentistry | ID: biblio-1051629

ABSTRACT

O objetivo desse estudo foi avaliar, in vitro, a corrosão em diferentes superfícies de Titânio comercialmente puro-Grau 4 (Ticp-G4) em função do efeito de biofilme bacteriano de Enterococcus faecalis. 57 discos foram utilizados divididos aleatoriamente de acordo com a superfície (n=19): Grupo I superfície usinada (USI); Grupo II superfície texturizada por duplo ataque ácido (D.A.) e Grupo III superfície texturizada por duplo ataque ácido e jateamento por zircônia (D.A.Zir). Para análise microbiológica (n=9), os discos foram posicionados em placas de 24 poços contendo cultura de Enterococcus faecalis à 1.5 x 105 células/mL em meio BHI caldo e incubados por 168 horas (7 dias) a 37° C. Após este período os discos foram removidos e as bactérias aderidas em sua superfície foram avaliadas por meio de contagem de Unidades Formadora de Colônias/mL (UFC/mL). Para análise corrosiva (n=5), novos espécimes foram inoculados da mesma forma em cultura de E. faecalis e após 7 dias, estes foram destinados ao ensaio eletroquímico por meio de espectroscopia de impedância eletroquímica (EIE), utilizando como eletrólitos BHI e biofilme e BHI caldo estéril. Os resultados foram submetidos à análise estatística: microbiológico (ANOVA com pós teste Tukey; 5%) e ensaio eletroquímico (ANOVA 2 Fatores e pós teste Tukey 5%). Na avaliação da contagem celular bacteriana, somente D.A.Zir (média 34 UFC/ml) diferiu de USI (média 16 UFC/ml) (p = 0,034), mas não de D.A. (24 UFC/ml). Na espectroscopia de impedância eletroquímica, para Nyquist e BODE, o grupo D.A.Zir (Biofilme) manifestou pior comportamento eletroquímico. Para resistência à polarização o USI (BHI) teve melhor resistência de troca iônica com o meio. Para o estudo eletroquímico D.A.Zir (Biofilme) tive o pior comportamento eletroquímico e o grupo USI (BHI) teve melhor capacidade de resistir as trocas iônicas. Conclui-se que houve maior formação de biofilme para o grupo D.A.Zir, com maior troca eletroquímica para D.A.Zir (Biofilme) e a presença biofilme favoreceu uma maior troca eletroquímica para com o meio(AU)


The objective of this study was to evaluate, in vitro, the corrosion in different surfaces of Titanium commercially pure-Grade 4 (Ticp-G4) as a function of the bacterial biofilm effect of Enterococcus faecalis. 57 disks were randomly divided according to the surface (n = 19): Group I machined surface (USI); Group II surface textured by double acid attack (D.A.) and Group III surface textured by double acid etching and zirconia (D.A.Zir). For microbiological analysis (n = 9), the discs were positioned in 24-well plates containing Enterococcus faecalis culture at 1.5 x 10 5 cells / ml in broth BHI medium and incubated for 168 hours (7 days) at 37 ° C. period the discs were removed and the bacteria adhered on its surface were evaluated by means of Colony Forming Units / mL (CFU / mL) counts. For corrosive analysis (n = 5), new specimens were inoculated in the same way in E. faecalis culture and after 7 days, they were destined to the electrochemical test by means of electrochemical impedance spectroscopy (IEE) using BHI and biofilm electrolytes and BHI sterile broth. The results were submitted to statistical analysis: microbiological (ANOVA with Tukey post test, 5%) and electrochemical test (ANOVA 2 Factors and post test Tukey 5%). In the evaluation of bacterial cell count, only D.A.Zir (mean 34 CFU / ml) differed from USI (mean 16 CFU / ml) (p = 0.034), but not D.A. (24 CFU / ml). In electrochemical impedance spectroscopy, for Nyquist and BODE, the D.A.Zir (Biofilm) group showed worse electrochemical behavior. For resistance to polarization the USI (BHI) had better ion exchange resistance with the medium. For the electrochemical study D.A.Zir (Biofilm) had the worst electrochemical behavior and the USI group (BHI) had better ability to resist ionic exchanges. It was concluded that there was a higher biofilm formation for the D.A.Zir group, with a higher electrochemical exchange for D.A.Zir (Biofilm) and the biofilm presence favored a greater electrochemical exchange with the medium(AU)


Subject(s)
Titanium , Enterococcus faecalis , Biofilms , Corrosion , Dental Implantation, Endosseous
5.
Arch. health invest ; 7(12): 508-510, dez. 2018. ilus
Article in Portuguese | BBO - Dentistry | ID: biblio-994820

ABSTRACT

A oclusão equilibrada e em perfeita harmonia é objetivo primordial em prótese total. Este trabalho tem como objetivo mostrar a influência da utilização dos princípios na confecção de prótese total e seu resultado. Paciente do sexo feminino, 67 anos, portadora de prótese total bimaxilar buscou atendimento especializado tendo como queixa principal mobilidade de sua prótese total superior, acompanhada de queixa estética. Dentre os planos de tratamento propostos, foi realizada a confecção de novas próteses totais respeitando princípios e passos visando o reestabelecimento de função e estética. No momento da instalação observou-se a oclusão bilateral balanceada, tendo objetivo do tratamento alcançado. A confecção de prótese odontológica deve respeitar os princípios básicos e fundamentais de confecção, bem como os requisitos inerentes às possibilidades reabilitadoras, tendo em vista que o seu resultado influencia diretamente na qualidade de vida do paciente(AU)


The right balanced occlusion and perfect harmony are the main target in full arch prosthesis. The aim of this work is to evidence the influence on correct use of full arch prosthetic rehabilitation precepts in manufacture and its result. A 67-year-old female patient with a total bimaxillary prosthesis sought specialized care having as main complaint the mobility of her maxillary total prosthesis and aesthetic complaint. Among the proposed treatment plans, it was carried out making new dentures respecting principles and steps towards the function and aesthetics re-establishment. When installing observed balanced bilateral occlusion, with the aim reached treatment. The preparation of dental prosthesis must respect the steps and basic principles of preparation and requirements inherent to rehabilitation possibilities, considering that its result directly influences the quality of life of patient(AU)


La oclusión equilibrada y en perfecta armonía eres objetivo primordial en prótesis total. Este trabajo tiene como objetivo mostrar la influencia de la utilización de los básicos principios en la confección de prótesis total y su resultado. Paciente, sexo femenino, 67 años, hace uso de prótesis total bimaxilar recurrió al atendimiento especializado y como principal reclamación la movilidad de su prótesis total superior tan cómo la estética. Entre las proposiciones de planos de tratamiento, se fue realizada la confección de nuevo par de prótesis totales respetando los principios y etapas en busca de la devolución de función y estética. Al momento de la instalación se fue posible observar la oclusión bilateral balanceada, teniendo el objetivo alcanzado. Para que la prótesis odontológica sea confeccionada se debe respetar los principios básicos fundamentales de la confección y los requisitos inherentes a las posibilidades rehabilitadoras, observando que su resultado tiene directa influencia en la calidad de vida del paciente(AU)


Subject(s)
Humans , Female , Aged , Dental Occlusion , Denture, Complete , Esthetics, Dental , Quality of Life
6.
Arch. health invest ; 7(9): 375-378, set. 2018.
Article in English | BBO - Dentistry | ID: biblio-988607

ABSTRACT

The aim of this study was to evaluate the anaesthetic failure rate of the pterygomandibular technique with an inferior alveolar nerve block in lower third molar extraction procedures. Materials and Methods: A total of 67 healthy patients (men and women, aged between 18­35 years) requiring third molar extractions were selected from the Discipline of Surgery, of the Araçatuba Dental School. The anaesthetic technique utilised was a pterygomandibular block using 2% mepivacaine hydrochloride with epinephrine 1:100,000 (Mepivalem®) in a maximum standardised amount of three tubes (5.4 ml) per procedure (performed by the same operator). Surgical procedures were initiated after confirming the sensation of anaesthesia in the area anesthetised at the inferior alveolar nerve. Painful symptoms were recorded during surgery. Results: In total, 117 surgical procedures, i.e., 114 exodontias and three coronectomies, were performed. During surgical procedures, four patients reported pain during manoeuvres of odontosection, representing an anaesthetic failure rate of 3.41%. Alternative techniques utilised in these four patients involved milohioideo nerve, intraligamentaria, and intrapulpal anaesthesia. Conclusion: The success of inferior alveolar nerve block anaesthesia is difficult to predict due to large anatomical variations, and it is difficult to observe via diagnostic means. The relatively low percentage of anaesthetic failure reported in this study may be related to the number of procedures performed(AU)


O objetivo deste estudo foi avaliar a taxa de falha anestésica da técnica pterigomandibular com bloqueio do nervo alveolar inferior em procedimentos de extração do terceiro molar inferior. Material e Método: um total de 67 pacientes saudáveis (homens e mulheres, com idade entre 18-35 anos) que requeriam extrações do terceiro molar foram selecionados da Disciplina de Cirutgia da Faculdade de Odontologia de Araçatuba. A técnica anestésica utilizada foi um bloqueio pterigomandibular usando cloridrato de mepivacaína a 2% com epinefrina 1: 100,000 (Mepivalem®) em uma quantidade máxima padronizada de três tubos (5,4 ml) por procedimento (realizado pelo mesmo operador). Os procedimentos cirúrgicos foram iniciados após confirmação da sensação de anestesia na área anestesiada no nervo alveolar inferior. Sintomas dolorosos foram registrados durante a cirurgia. Resultados: No total, foram realizados 117 procedimentos cirúrgicos, isto é, 114 exodontias e três coronectomias. Durante os procedimentos cirúrgicos, quatro pacientes relataram dor durante as manobras de odontossecção, representando uma taxa de falha anestésica de 3,41%. As técnicas alternativas utilizadas nesses quatro pacientes envolveram nervo milohioideo, intraligamentar e anestesia intrapulpar. Conclusão: o sucesso da anestesia com bloqueio do nervo alveolar inferior é difícil de prever devido a grandes variações anatômicas e é difícil de observar por meio de meios diagnósticos. A porcentagem relativamente baixa de falha anestésica relatada neste estudo pode estar relacionada ao número de procedimentos realizados(AU)


El objetivo de este estudio fue evaluar la tasa de falla anestésica de la técnica pterigomandibular con bloqueo del nervio alveolar inferior en procedimientos de extracción del tercer molar inferior. Material y método: un total de 67 pacientes sanos (hombres y mujeres, con edad entre 18-35 años) que requerían extracciones del tercer molar fueron seleccionados de la Disciplina de Cirutía de la Facultad de Odontología de Araçatuba. La técnica anestésica utilizada fue un bloqueo pterigomandibular usando clorhidrato de mepivacaína al 2% con epinefrina 1: 100,000 (Mepivalem®) en una cantidad máxima estandarizada de tres tubos (5,4 ml) por procedimiento (realizado por el mismo operador). Los procedimientos quirúrgicos se iniciaron después de confirmar la sensación de anestesia en el área anestesiada en el nervio alveolar inferior. Los síntomas dolorosos se registraron durante la cirugía. Resultados: En total, se realizaron 117 procedimientos quirúrgicos, es decir, 114 exodontias y tres coronectomías. Durante los procedimientos quirúrgicos, cuatro pacientes relataron dolor durante las maniobras de odontosección, representando una tasa de falla anestésica del 3,41%. Las técnicas alternativas utilizadas en estos cuatro pacientes involucraron nervio milohioideo, intraligamentar y anestesia intrapulpar. Conclusión: el éxito de la anestesia con bloqueo del nervio alveolar inferior es difícil de predecir debido a grandes variaciones anatómicas y es difícil de observar por medio de medios diagnósticos. El porcentaje relativamente bajo de falla anestésica reportada en este estudio puede estar relacionado al número de procedimientos realizados(AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Anesthesia, Dental , Molar, Third/surgery , Anesthesia, Local , Molar, Third
7.
J Craniofac Surg ; 29(6): e591, 2018 Sep.
Article in English | MEDLINE | ID: mdl-30028394

ABSTRACT

The migration of a dental implant into the maxillary sinus is an uncommon event of occurrence. Disrespect for concepts of implantology, low alveolar bone density at the site, high incidence of masticatory force in posterior region, and clinical intercurrences predispose to failure in rehabilitation.


Subject(s)
Dental Implantation, Endosseous/adverse effects , Dental Implants/adverse effects , Foreign-Body Migration/complications , Maxillary Sinusitis/etiology , Postoperative Complications , Dental Implantation, Endosseous/methods , Device Removal , Female , Foreign-Body Migration/diagnosis , Foreign-Body Migration/surgery , Humans , Maxillary Sinus , Maxillary Sinusitis/diagnosis , Maxillary Sinusitis/surgery , Middle Aged , Tomography, X-Ray Computed
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