Evaluation of Removal Torque and Internal Surface Alterations in Frictional Morse Taper Connections After Mechanical Loading Associated or Not with Oral Biofilm.

PURPOSE: To evaluate the abutment removal torque and the morphologic aspects of wear in frictional Morse taper connections after axial loading with or without biofilm immersion. MATERIALS AND METHODS: Thirty sets of Morse taper implants and prosthetic abutments were divided into six groups based on the number of mechanical loading cycles and immersion in biofilm derived from human saliva: without load, without biofilm; without load, with biofilm; 100,000 cycles of load, without biofilm; 100,000 cycles of load, with biofilm; 500,000 cycles of load, without biofilm; and 500,000 cycles of load, with biofilm. Mechanical loading was applied at a force of 80 ± 15 N with a frequency of 2 Hz for 100,000 or 500,000 cycles. After removal torque evaluation, the internal surface of the implants was evaluated by scanning electron microscopy and optical profilometer. The results were statistically analyzed at a significance level of P = .05. RESULTS: Overall, the removal torque increased for samples submitted to loading (100,000 cycles of load, without biofilm = 83.8 ± 15.8 Ncm; 100,000 cycles of load, with biofilm = 160.6 ± 16.2 Ncm; 500,000 cycles of load, without biofilm = 147.0 ± 29.3 Ncm; 500,000 cycles of load, with biofilm = 154.5 ± 14.0 Ncm) compared to samples without loading (without load, without biofilm = 23.0 ± 9.4 Ncm; without load, with biofilm = 27.2 ± 7.5 Ncm). The removal torque was not different between groups that received the same number of loading cycles and varied on biofilm exposure (P > .05). However, samples immersed in biofilm showed higher values of removal torque. Surface analysis revealed that the damage on the internal surface of implants was lower in samples not submitted to cyclic mechanical loading (P < .05) independently of immersion in biofilm medium. CONCLUSION: Cyclic mechanical load on the frictional implant-abutment connection of Morse taper implants increased the removal torque of abutments. The findings of this research suggest that the presence of biofilm can potentially increase the removal torque in frictional Morse taper connections, although more studies are recommended to support this affirmation. Oral biofilm did not interfere with the presence of wear areas along the internal surface of Morse taper implants but increased the roughness values.

Optical Behavior of Zirconia-Based Restorations Over Teeth and Implants in the Esthetic Zone: A Clinical Report.

While various zirconia-based alternatives are available today for the restoration of teeth and implants in the esthetic zone, each treatment approach could result in different optical behavior. To clinically demonstrate these differences, this case report describes a rehabilitation in the esthetic zone using several options of teeth- and implant-supported restorations. Conventional veneered zirconia crowns, high-translucent monolithic zirconia crowns, and minimally veneered high-translucent zirconia crowns were proposed and assessed under different light sources before cementation. The patient and clinical team achieved consensus on the minimally veneered high-translucent zirconia crowns, which were then cemented and have performed well over both tooth and implant substrates.

Clinical and tomographic comparison of dental implants placed by guided virtual surgery versus conventional technique: A split-mouth randomized clinical trial.

AIM: Our objective was to compare guided virtual surgery to conventional surgery in terms of angular deviation of single dental implants placed in the posterior mandible. MATERIALS AND METHODS: Patients with bilateral homologous single teeth missing in the posterior mandible were eligible for this split-mouth randomized clinical trial. Cone beam computed tomography (CBCT) was performed for virtual planning of implant position and manufacturing of the stereolithographic guides. One week after the surgery, a second CBCT scan was superimposed to the initial planning. Primary endpoint was the angular deviation between virtual and clinical implant position. Secondary endpoints were linear deviations and patient-reported outcomes collected with a questionnaire. RESULTS: Data from 12 patients were available for analysis. Angular deviation was significantly lower using stereolithographic guides as compared to conventional guides (2.2 ± 1.1° vs. 3.5 ± 1.6°, p = .042). Linear deviations were similar for both techniques in the coronal (2.34 ± 1.01 vs. 1.93 ± 0.95 mm) and apical (2.53 ± 1.11 vs. 2.19 ± 1.00 mm) dimensions (p Ëƒ .05). The selection of the surgical technique had no significant impact on the patient-reported outcomes. CONCLUSION: Our data suggest that the angular discrepancy between the virtual and the clinical implant position is slightly lower when using stereolithographic guides as compared to conventional guides.

Implante imediato com provisionalização imediata através de cicatrizador multifuncional de PEEK / Immediate implant placement and provisionalization using a multifunctional PEEK healing abutment

Este artigo teve por objetivo apresentar um caso clínico cuja prótese provisória utilizou um componente protético multifuncional de PEEK. Este é um polímero biocompatível personalizável e de boa aderência às resinas. O caso descrito é um implante imediato com carga imediata na região do 21. Foi realizado um approach palatino do implante, preenchimento do gap vestibular com um enxerto aloplástico (Nanosynt), um provisório imediato utilizando um componente provisório multifuncional de PEEK e um dente de estoque. O caso foi acompanhado até a fase de confecção da prótese defi nitiva, na qual foi verifi cada a arquitetura dos tecidos peri-implantares quanto à saúde e manutenção. Na Implantodontia contemporânea, o PEEK é a opção biológico-funcional com melhor custo-benefício nos casos de implantes colocados e carregados imediatamente.

The aim of this article was to present a clinical case where the provisional restoration was fabricated over a multifunctional PEEK healing abutment. This biocompatible polymer can be customized and has excellent bond strength to resin composites. A dental implant was loaded at the region of tooth 21. After a palatal approach for implant placement, the buccal gap was fi lled with an alloplastic graft (Nanosynt). Then, the immediate restoration was fabricated with the multifunctional PEEK and an acrylic tooth form. At the delivery of the defi nitive restoration, the peri-implant soft tissue health and architecture were preserved. In the contemporary implant dentistry, PEEK abutments provide the best biological and functional option with a signifi cant cost-benefi t ratio for cases of immediate implant loading

Can Time of Implant Placement influence Bone Remodeling?

Since the alveolar process is tissue "dental dependent," after the extraction of the dental element, this process suffers some degree of atrophy during the healing process, which can be reduced with the installation of immediate implants, aiming to maintain the original bone architecture. The aim of this study was to investigate the influence of the time of implant placement on bone formation around them. Seven dogs were selected and randomly divided into two groups: Group 1, where implants were placed immediately after extraction of two lower premolars without flap elevation, and group 2, where implants were delayed by 4 months after extractions. Each group received 14 implants, and 4 months after the second surgery, the samples were processed and analyzed histomorphometrically. A mean average analysis and the Kruskal-Wallis test (p < 0.05) were performed. The buccal bone-implant contact (BIC) mean average was found larger in immediate implants (42.61%) compared with delayed implants (37.69%). Group 1 had statistically higher outcomes in bone formation and BIC on the buccal bone wall. It was concluded that performing immediate implants with the palatal approach technique and leaving a buccal GAP enables a higher or at least equal rate to BIC and bone area around them, when compared with delayed implants. Actually, the patients and dentists want to do a shorter treatment with satisfactory results, but it is necessary to understand whether different times of implant placement can influence the results and longevity of the treatment.

Biofilm Formation on Different Materials Used in Oral Rehabilitation.

The aim of this study was to evaluate the density and the morphological aspects of biofilms adhered to different materials applied in oral rehabilitation supported by dental implants. Sixty samples were divided into four groups: feldspar-based porcelain, CoCr alloy, commercially pure titanium grade IV and yttria-stabilized zirconia. Human saliva was diluted into BHI supplemented with sucrose to grow biofilms for 24 or 48 h. After this period, biofilm was removed by 1% protease treatment and then analyzed by spectrophotometry (absorbance), colony forming unit method (CFU.cm-2) and field-emission guns scanning electron microscopy (FEG-SEM). The highest values of absorbance and CFU.cm-2 were recorded on biofilms grown on CoCr alloys when compared to the other test materials for 24 or 48 h. Also, FEG-SEM images showed a high biofilm density on CoCr. There were no significant differences in absorbance and CFU.cm-2 between biofilms grown on zirconia, porcelain and titanium (p<0.05). Microbiological assays associated with microscopic analyses detected a higher accumulation of oral biofilms on CoCr-based materials than that on titanium or zirconia that are used for prosthetic structures.

Biofilm Formation on Different Materials Used in Oral Rehabilitation

Abstract The aim of this study was to evaluate the density and the morphological aspects of biofilms adhered to different materials applied in oral rehabilitation supported by dental implants. Sixty samples were divided into four groups: feldspar-based porcelain, CoCr alloy, commercially pure titanium grade IV and yttria-stabilized zirconia. Human saliva was diluted into BHI supplemented with sucrose to grow biofilms for 24 or 48 h. After this period, biofilm was removed by 1% protease treatment and then analyzed by spectrophotometry (absorbance), colony forming unit method (CFU.cm-2) and field-emission guns scanning electron microscopy (FEG-SEM). The highest values of absorbance and CFU.cm-2 were recorded on biofilms grown on CoCr alloys when compared to the other test materials for 24 or 48 h. Also, FEG-SEM images showed a high biofilm density on CoCr. There were no significant differences in absorbance and CFU.cm-2 between biofilms grown on zirconia, porcelain and titanium (p<0.05). Microbiological assays associated with microscopic analyses detected a higher accumulation of oral biofilms on CoCr-based materials than that on titanium or zirconia that are used for prosthetic structures.

Resumo O objetivo deste estudo foi avaliar a densidade e os aspectos morfológicos dos biofilmes aderidos a diferentes materiais aplicados em reabilitação oral sobre implantes dentários. Sessenta amostras foram divididas em quatro grupos: porcelana à base de feldspato, liga de CoCr, titânio grau IV comercialmente puro e zircônia estabilizada com ítrio. Saliva humana diluída em BHI foi suplementada com sacarose para possibilitar a formação de biofilme por 24 e 48 h. Após este período, o biofilme foi removido utilizando protease a 1% e, em seguida, analisada por espectrofotometria (absorbância), unidades formadoras de colônia (CFU.cm-2) e microscopia eletrônica de varredura (MEV). Os valores mais elevados de absorbância e CFU.cm-2 foram encontrados em ligas de CoCr quando comparado com os outros materiais testados. Os resultados obtidos foram semelhantes nos biofilmes formados sobre titânio e zircônia durante 24 e 48 h (p<0,05). As análises microbiológicas e microscópicas demostraram uma maior tendência ao acúmulo de biofilmes orais sobre estruturas protéticas baseadas em CoCr quando comparadas com porcelana feldspática, titânio ou zircônia.

Influence of immediate/delayed implant placement and implant platform on the peri-implant bone formation.

AIM: To determinate the influence of the timing and position of the implant placement, as well as the presence and absence of a buccal gap, associated with different implant platforms on bone formation around implants. METHODS AND MATERIALS: In a first surgical stage, two premolars in one side of the mandibular arch of 07 mongrel dogs were extracted. After a 120-day healing period, a second-stage surgery was performed, in which a full flap was raised and two implants were installed. At this same stage, two contralateral premolars were extracted and two immediate implants were placed into the fresh sockets, through the "palatal approach technique" without flap elevation, totaling four implants per animal. The 28 installed implants constituted groups according to the timing (Immediate or delayed) of placement and the type of surface treatment. After 4 months, samples were collected and histomorphometric analysis was performed to determinate buccal surface BIC, lingual surface BIC, total BIC, buccal area, and lingual area of all implants. Kruskal-Wallis and pared Wilcoxon (P < 0.05) tests were performed for statistical analysis. RESULTS: After 4-month healing period, the groups of immediate implants presented better BIC scores, mainly on the buccal surface. Data also suggest better bone area formation around the implants of these same groups. Concerning the type of implant platform, better results were found using Morse taper. CONCLUSION: The flapless technique with "palatal approach," Morse taper implants, and immediate implant placement all have favorable influence on the bone formation around the implants.

Antimicrobial effects of commensal oral species are regulated by environmental factors.

OBJECTIVES: The objectives of this study are to identify oral commensal species which can inhibit the growth of the main periodontopathogens, to determine the antimicrobial substances involved in these inhibitory activities and to evaluate the influence of environmental factors on the magnitude of these inhibitions. METHODS: The spotting technique was used to quantify the capacity of 13 commensal species to inhibit the growth of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia. By altering experimental conditions (distance between spots and size of spots and concentration of commensal and pathogen) as well as environmental factors (inoculation sequence, oxygen and nutrition availability) the influence of these factors was evaluated. Additionally, the mechanism of inhibition was elucidated by performing inhibition experiments in the presence of peroxidase, trypsin and pepsin and by evaluating acid production. RESULTS: Streptococcus sanguinis, Streptococcus cristatus, Streptococcus gordonii, Streptococcus parasanguinis, Streptococcus mitis and Streptococcus oralis significantly inhibit the growth of all pathogens. The volume of the spots and concentration of the commensal have a significant positive correlation with the amount of inhibition whereas distance between the spots and concentration of the pathogen reduced the amount of inhibition. Inhibition is only observed when the commensal species are inoculated 24h before the pathogen and is more pronounced under aerobic conditions. Hydrogen peroxide production by the commensal is the main mechanism of inhibition. CONCLUSION: Bacterial antagonism is species specific and depending on experimental as well as environmental conditions. Blocking hydrogen peroxide production neutralizes the inhibitory effect. CLINICAL SIGNIFICANCE: Identifying beneficial oral bacteria and understanding how they inhibit pathogens might help to unravel the mechanisms behind dysbiotic oral diseases. In this context, this study points towards an important role for hydrogen peroxide. The latter might lead in the future to novel preventive strategies for oral health based on improving the antimicrobial properties of commensal oral bacteria.

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.

Implantoplastia no tratamento da peri-implantite û relato de caso / Use of Implantoplasty in the treatment of peri-implantitis û case report

A Implantoplastia é uma terapia cirúrgica utilizada com sucesso no tratamento da peri- -implantite. A técnica consiste no alisamento e polimento das roscas expostas do implante, que sofreu perda óssea e contaminação por micro-organismos patogênicos. Este artigo objetiva demonstrar, a partir de um relato de caso clínico, a execução do procedimento de Implantoplastia, bem como seu resultado e acompanhamento. O controle do caso ocorreu com 7 dias, 14 dias e 6 meses...

Implantoplasty is a surgical therapy successfully used in the treatment of peri-implantitis. The technique consists of smoothing and polishing the exposed implant surfaces, which has suffered bone loss and contamination by pathogenic microorganisms. This article aims to demonstrate, with a case report, the Implantoplasty technique as well as its result and monitoring. Follow-up was performed at 7 days, 14 days, and six months...

Implante imediato com estética imediata, definitiva e acompanhamento tomográfico da tábua óssea vestibular û relato de caso / Immediate implant, immediate aesthetic and final restoration with tomographic follow-up of the buccal plate û case report

O resultado da terapia com implantes osseointegrados não é apenas mensurado pela taxa de sobrevivência, mas também pela estabilidade/ integridade estética e funcional dos tecidos peri-implantares a longo prazo. A técnica do implante imediato tornou-se uma opção viável para a manutenção da arquitetura peri-implantar, além de reduzir significantemente o tempo do tratamento. O presente caso clínico descreve a resolução de um único elemento dentário maxilar anterior perdido (elemento 22), através da instalação de implante imediato pós-exodontia sem retalho, estética imediata e definitiva, com acompanhamento tomográfico de 6 meses e 1 ano das alterações da tábua óssea vestibular. Este tipo de abordagem de tratamento diminui o número de intervenções cirúrgicas, bem como o tempo de instalação da restauração protética final, aumentando a satisfação estética e funcional do paciente. É evidente que o sucesso desta técnica requer a seleção correta dos casos, exodontia atraumática e estabilidade primária.

The outcome of the therapy with osseointegrated implants is not only measured through survival rate, but also through aesthetic and function stability of the peri-implant tissue during long-term. Immediate implants technique has become an option for maintaining the peri-implant architecture and reduce the time of treatment. This case report presents the complete resolution of a single anterior maxillary tooth loss (element 22), by installing an implant immediately after tooth extraction without flap, immediate and definitive aesthetic, with 6 months and 1 year CT scan follow-up to analyze alterations on the buccal bone plate. This type of approach reduces the number of surgical interventions, as well as the installation time of final prosthetic restoration, increasing functional and aesthetic satisfaction of the patient. It is evident that the success of this technique requires proper selection of cases, atraumatic extraction of the tooth and primary stability of the implant.

Influência da elevação do retalho, durante a instalação de implantes imediatos, na remodelação óssea peri-implantar / Influence of flap elevation during immediate implant placement on peri-implant bone remodeling

Verificar a influência dos retalhos cirúrgicos na formação óssea peri-implantar. Métodos: quatro pré-molares da arcada inferior de sete cães, de raça não definida, foram extraídos, e quatro implantes imediatos foram instalados. Os grupos foram divididos em G1, sem retalho, e G2, com elevação de retalho de espessura total, totalizando 14 implantes em cada grupo. Após quatro meses, realizou-se a coleta das amostras e a análise histomorfométrica, a fim de se observar contato osso-implante (BIC) vestibular, BIC total, área vestibular e área total de todos os implantes. Para análise estatística intergrupos utilizou-se o teste de Mann-Whitney (p < 0,05). Resultados: observou-se que o grupo referente aos implantes instalados sem elevação de retalho apresentou melhores taxas de BIC, tanto na face vestibular quanto no BIC total. Os dados também mostraram-se superiores estatisticamente em prol do grupo sem retalho, quanto à área óssea na face vestibular dos implantes. Conclusão: conclui-se que a técnica cirúrgica sem retalho têm influência favorável na formação óssea ao redor dos implantes...

The aim of this study was to assess the influence of surgical flaps over boneformation around implants. Methods: Seven mongrel dogs had four mandibular pre-molars extracted and four immediate implants placed. The experimental groups were divided into G1 (flapless) and G2 (full-thickness flap), totaling 14 implants in each group. After four months, samples were collected and histomorphometric analysis was carried out with a view to assessing buccal bone-to-implant contact (BIC), total BIC, buccal area, and total area of all implants. For intergroup statistical analysis, Mann-Whitney test was applied (p < 0.05). Results: The group comprising implants without flap elevation had better BIC rates, both buccal and total BIC, than the flap elevation group. Additionally,data yielded better results in favor of the group without flap, which was statistically significant, particularly with regard to bone formation on the buccal surface of implants. Conclusion: The flapless surgical technique produces favorable effects on bone formation around implants...

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.

Creeping attachment involving dental implants: two case reports with a two-year follow-up from an ongoing clinical study.

Introduction. This paper describes case reports where coronal growth of soft tissue on implant threads was observed after surgery for soft tissue graft. This phenomenon is known as "creeping attachment." Methods. Two patients were submitted to gingival graft procedure including subepithelial connective tissue graft and masticatory mucosal graft. A two-year follow-up appointment was performed. Results. After a two-year follow-up gingival growth over titanium surfaces characterizing the "creeping attachment" phenomenon was observed. This gingival growth happened over abutment and threads surfaces. Conclusion. The creeping attachment phenomenon is possible over titanium surfaces and has not yet been reported in the relevant literature over this kind of structure.

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. .

Correção de sorriso gengival com osteotomia sem retalho: previsibilidade com o mínimo de morbidade / Correcting gingival smile through flapless osteotomy:predictability with minimal morbidity

O aumento de coroa clínica estético pode ser uma das alternativas para correção ou minimização do sorriso gengival, ou para pequenas discrepâncias estéticas na margem gengival. Tradicionalmente, esse procedimento é realizado por meio da elevação do retalho e posterior osteotomia/osteoplastia. Porém, em casos bem indicados, é possível realizar tal procedimento, via sulco gengival, com microcinzéis, sem a necessidade de elevação do retalho. Esse artigo demonstra, indica e discute, a partir de um relato de caso, a possibilidade de correção do sorriso gengival por meio da técnica de osteotomia sem retalho (Flapless)...

Esthetic crown lengthening might be a possible alternative to correct or minimize gingivalsmile or slight discrepancies in esthetic gingival margin. Traditionally, this procedure is performedusing flap elevation and subsequent osteotomy/osteoplasty. However, in very specific cases,such procedure can be performed through the gingival sulcus with micro-chisels and without theneed for flap elevation. This article demonstrates, indicates and discusses, based on a case report,the possibility of correction of gingival smile by means of the flapless osteotomy technique...

Otimização da regeneração óssea guiada em alvéolo pós-extração, por meio da técnica de Fugazzoto / Optimization of guided bone regeneration in post-extraction socket by means of the Fugazzoto technique

Introdução: durante o planejamento cirúrgico da reabilitação protética usando implantes osseointegráveis, é comum nos depararmos com limitações, como com seios maxilares pneumatizados. Nessas ocasiões, podemos lançar mão de procedimentos de regeneração alveolar e enxertia óssea. Métodos: entre as várias técnicas existentes, esse artigo discute e apresenta uma possibilidade de regeneração alveolar, por meio de um relato de caso. Resultados: foi obtido um ganho ósseo considerável, que possibilita a instalação do implante sem mais nenhum procedimento de enxertia. Conclusão: notou-se uma boa previsibilidade com a regeneração óssea guiada e a otimização do tratamento cirúrgico...

Introduction: During the surgical planning for prosthetic rehabilitation performed by means of osseointegrated implants, we often face some limitations such as pneumatized maxillary sinus, in which case we can make use of alveolar regeneration and bone grafting procedures. Objective: This article discusses and reports a case of alveolar regeneration. Results: Treatment resulted in bone gain that allows implant placement without further grafting procedures. Conclusion: Guided bone regeneration (GBR) provided predictability and optimization of surgical treatment...

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.

Implante imediato em área de septo inter-radicular: relato de caso / Immediate implant in inter-radicularseptum area: case report

Introdução: o planejamento reabilitador de elementos dentários perdidos procura obter uma boa cicatrização dos tecidos moles ao redor da prótese, criando o correto perfil de emergência. Com isso, pode-se evitar a manipulação excessiva desses tecidos, aproveitando o tecido e/ou osso existente. Objetivo: esse relato de caso descreve a extração de um primeiro molar inferior fraturado, extraído atraumaticamente, seguida de instalação imediata de implante dentário no alvéolo preparado em região de septo ósseo inter-radicular. Métodos: a técnica operacional atraumática e a inserção imediata do implante resultaram na preservação dos tecidos duros e moles no local de extração. Resultados: o paciente não apresentou qualquer evidência clínica de complicações, permitindo a instalação de prótese definitiva implantossuportada, que apresentou-se em harmonia com os tecidos peri-implantares, função, conforto e, o mais importante: preservação dos tecidos.

Introduction: The purpose of rehabilitation after tooth loss is the optimal healing of soft tissues aroundthe prosthesis so that an adequate emergence profile can be achieved. Excessive handling of these tissuesmay be avoided by using existing bone. Objective: This case report describes the atraumatic extractionof a fractured mandibular first molar and the immediate placement of an implant in the inter-radicularseptum. Methods: The atraumatic technique and the immediate placement of the implant preserved hardand soft tissues in the extraction site. Results: The patient had no clinical evidence of complications, thedefinitive implant-supported prosthesis was immediately placed. The adaptation of peri-implant tissueswas satisfactory; function and comfort were restored, and, above all, tissues were preserved.