Treatment of Resorbed Mandibles with Titanium Plate and Immediate Implant-Supported Prosthesis - Case Series.

Severely resorbed mandibles with only cortical bone remaining can fracture during or after implant placement. This case series presents a technique to reduce the risk or the consequences of mandibular fracture. Seven patients with only cortical mandibular bone remaining were treated with the fixation of a titanium plate in the frontal surface previously to implant placement, during the same surgical procedure. Immediate complete-arch implant supported prosthesis were installed. Patient's systemic and local conditions that could influence implant survival were registered previously to surgery and during the follow up period. Biological and biomechanical complications were recorded. The condition of peri-implant tissues was evaluated. The follow-ups ranged from 12 to 84 months. Twenty-nine implants were placed and no implant failure or other biological complication was observed. The peri-implant tissue evaluation demonstrated most implants was surrounded by keratinized tissue (89.5%). No marginal recession (implant platform cervical to gingival margin) was observed. Probing depth was normal, ranging from 0 to 3 mm. Low scores of plaque index or bleeding on probing were recorded. Biomechanical complications evolved loosening of 4 prosthetic screws and 1 fractured. The use of a titanium plate for the fixation of severely resorbed mandibles with only cortical bone remaining was a safe treatment procedure, avoiding biological and major biomechanical complications in the treatment with immediate complete-arch implant-supported prosthesis.

Treatment of resorbed mandibles with titanium plate and immediate implant-supported prosthesis - case series

Abstract Severely resorbed mandibles with only cortical bone remaining can fracture during or after implant placement. This case series presents a technique to reduce the risk or the consequences of mandibular fracture. Seven patients with only cortical mandibular bone remaining were treated with the fixation of a titanium plate in the frontal surface previously to implant placement, during the same surgical procedure. Immediate complete-arch implant supported prosthesis were installed. Patient's systemic and local conditions that could influence implant survival were registered previously to surgery and during the follow up period. Biological and biomechanical complications were recorded. The condition of peri-implant tissues was evaluated. The follow-ups ranged from 12 to 84 months. Twenty-nine implants were placed and no implant failure or other biological complication was observed. The peri-implant tissue evaluation demonstrated most implants was surrounded by keratinized tissue (89.5%). No marginal recession (implant platform cervical to gingival margin) was observed. Probing depth was normal, ranging from 0 to 3 mm. Low scores of plaque index or bleeding on probing were recorded. Biomechanical complications evolved loosening of 4 prosthetic screws and 1 fractured. The use of a titanium plate for the fixation of severely resorbed mandibles with only cortical bone remaining was a safe treatment procedure, avoiding biological and major biomechanical complications in the treatment with immediate complete-arch implant-supported prosthesis.

Resumo Mandíbulas severamente reabsorvidas com apenas osso cortical remanescente podem fraturar durante ou após a colocação de implantes. O presente relato de casos apresenta uma técnica para reduzir o risco ou as consequências da fratura mandibular. Pacientes com apenas osso cortical remanescente foram tratados com a fixação de placa de titânio na superfície frontal, previamente a colocação dos implantes, no mesmo procedimento cirúrgico. Próteses totais implanto-suportadas foram instaladas com carga imediata. Condições locais e sistêmicas dos pacientes que poderiam influenciar a sobrevivência dos implantes foram registradas previamente a cirurgia e durante o período de acompanhamento. Complicações biológicas e biomecânicas foram registradas. A condição dos tecidos peri-implante foi avaliada. Sete pacientes completaram o período de acompanhamento, variando entre 12 e 84 meses. Vinte e nove implantes foram colocados e nenhuma falha ou complicação biológica foi observada. A avaliação do tecido peri-implante demonstrou que a maioria dos implantes possuía tecido queratinizado (89,5%). Nenhuma recessão marginal (plataforma do implante cervical à margem gengival) foi observada. Profundidade de sondagem mostrou-se normal, variando entre 0 e 3 mm. Baixos escores de índice de placa ou sangramento à sondagem foram observados. Complicações biomecânicas envolveram perda de 4 e 1 fratura de parafusos protéticos. O uso da placa de titânio para fixação de mandíbulas severamente reabsorvidas com apenas osso cortical remanescente pode ser considerado tratamento seguro, evitando alterações biológicas e maiores complicações biomecânicas no tratamento com próteses totais imediatas implanto-suportadas.

Rehabilitation of a Severely Resorbed Posterior Mandible with 4-mm Extra-Short Implants and Guided Bone Regeneration: Case Report with 3-year Follow-up.

Alveolar bone resorption has been a major challenge for implant placement in regions limited by anatomical structures. New alternatives have been introduced with the inclusion of extra-short implants in dentistry. The association of guided bone regeneration (GBR) with the use of extra-short implants might be a viable alternative for regions with limited bone height. This case report aimed to present the rehabilitation of a patient with severe mandibular bone resorption in the posterior region. The association of GBR with the use of extra-short implants was a viable alternative after a 3-year follow-up.

Fibrina rica em plaquetas e piezocirúrgico em comparação com instrumento rotatório convencional e coágulo em cirurgia de terceiros molares inferiores impactados: relato de caso

Objetivo: avaliar os resultados pós-operatórios em cirurgias de terceiros molares inferiores impactados com um desenho split mouth. Em um dos lados, foi utilizada fibrina rica em plaquetas (PRF) e piezocirúrgico, no lado oposto, foi realizada osteotomia rotatória convencional e coágulo. Foram avaliados a relação entre as duas técnicas de osteotomia, o tempo cirúrgico e a gravidade das sequelas no pós-operatório, incluindo dor, edema, trismo e reparo. Relato de caso: este trabalho apresenta um relato de caso clínico como projeto-piloto de uma série de casos clínicos. Os terceiros molares inferiores indicados para extração, foram pareados pela classificação de Pell e Gregory, sendo divididos em: grupo A (hemiarco direito), utilizando o piezocirúrgico e PRF, e grupo B (hemiarco esquerdo), seguindo os padrões tradicionais com brocas rotatórias e coágulo. As exodontias foram realizadas em um único momento pelo mesmo cirurgião-dentista. O piezocirúrgico, comparado à técnica convencional, demonstrou menor dor pós-operatória pela escala de VAS, além de diminuir o número de analgésicos consumidos e reduzir significativamente o trismo após 72 horas da cirurgia. Em contrapartida, o seu tempo cirúrgico foi superior ao da técnica convencional. Considerações finais: conclui-se que o uso de piezocirúrgico e PRF obteve melhores resultados nas condições pós-operatórias com relação a dor, edema e reparo. Porém, o tempo cirúrgico foi maior que a osteotomia convencional e coágulo. Sendo assim, o presente estudo mostrou que a piezocirurgia e a utilização combinada de PRF têm efeitos positivos nos resultados pós-operatórios, após a exodontia de terceiro molar impactado.

Fixation of a severely resorbed mandible for complete arch screw-retained rehabilitation: A clinical report.

Severely resorbed mandibles with placed endosteal dental implants can fracture. Therefore, techniques to reduce the risk or minimize the consequences of these fractures are needed. This clinical report presents a technique for placing a titanium plate in a severely resorbed mandible subjected to complete-arch implant therapy. The titanium plate is placed in the same surgical procedure as the implants, allowing immediate implant loading. This technique provides safe implant-supported treatment for patients with severe mandibular resorption.

Clinical evaluation of anodized surface implants submitted to a counter torque of 25 ncm after 60 days of osseointegration: study in humans.

INTRODUCTION: Decreasing the time needed for osseointegration has always been a big challenge for modern implantodontics. The main factor which helps to decrease the time needed for osseointegration is the newly developed surfaces being used, as well as their microstructures, in relation to their osseoinductive properties. The aim of this work is to clinically evaluate the osseointegration of the implants when using The anodized surfaces in humans, following a 60 days-period of osseointegration. METHODOLOGY: Forty-Five implants were placed in different kinds of bones, according to the technique recommended by the manufacturer. Those implants were opened after 60 days of osseointegration. The success of evaluation was made through assessing the counter torque resistance of 25 Ncm. The implants which could withstand the applied torque were considered osseointegrated. RESULTS: Of the forty-five implants made in different kinds of bones, only one failed to present osseointegration, resulting in a success rate of 97.7 %. CONCLUSIONS: With this methodology it was possible to conclude that anodized surface implants present primary osseointegration after 60 days of healing, after which they can function normally.

Comparative study of immediately inserted dental implants in sinus lift: 24 months of follow-up.

OBJECTIVES: The primary aim of this study is to evaluate the success rate of immediately inserted dental implants in sinus lift and the secondary aim is to assess the reliability of performing simultaneous surgery for sinus lift, grafting and implant placement in situations of very low residual bone heights (<4 mm) in the posterior maxillae. MATERIALS AND METHODS: A series of consecutive patients who sought dental implant rehabilitation were included in this study. The sinus lift cases were selected and divided into two groups based on the maxillary alveolar height, ≥4 mm of radiographically measurable bone height (Group 1) and < 4 mm of bone height (Group 2). RESULTS: A total of 13 implants were installed in Group 1, whereas 8 implants were installed in Group 2. The success rate for dental implants in the sinus lifts reached 95.2% after a period of 24 months of evaluation, at 100% for Group 1 (bone height ≥ 4 mm) and 87.5% for Group 2 (bone height with < 4 mm). Besides the differences between the percentages of success, statistical differences were not reached when the groups were compared (Fisher's exact test, P = 0.38). CONCLUSIONS: Despite the limitations of this study, including its low number of participants, the results indicate that simultaneous surgery for sinus lifting, grafting and dental implants in posterior maxillae with very low bone heights (<4 mm) can be performed safely, although with lower success rates than found in patients with higher residual bone heights (>4 mm).

Tratamento da fratura de mandíbula atrófica associada reabilitação com implantes dentários – relato de caso / Treatment of atrophic mandible fracture combined to rehabilitation with dental implants – case report

O aumento da população idosa e o incremento da procura por tratamentos reabilitadores faz com que os profissionais dedicados a esta arte se depararem com a necessidade de reabilitação de mandíbulas atróficas e com o risco de sua fratura. A proposta deste trabalho foi apresentar o relato de um caso de tratamento de fratura de mandíbula atrófica. O caso foi tratado sob anestesia geral, com instalação de placa de fixação mandibular concomitante a instalação de 4 implantes cone morse para futura confecção de protocolo com desenho all on four. A técnica proporcionou adequada resolução para a fratura e proporcionou segurança para a futura reabilitação implantossuportada.

The increasing elderly population and increasing demand for rehabilitation treatments make professionals dedicated to this art faced with the need for rehabilitation of atrophic jaws and the risk of fracture. The purpose of this study was to present the case report of the treatment of atrophic mandible fractures. The patient was treated under general anesthesia, with installation of the mounting plate concomitant mandibular installing 4 morse taper implants for future preparation of protocol design on all four. The technique provided adequate resolution for fracture and provided security for the future rehabilitation implant.

Avaliação da presença de estruturas anatômicas em radiografia panorâmica que interfiram na técnica de levantamento do seio maxilar / Evaluation of the presence of anatomical structures in panoramic radiography that interfere with the survey technique of the sinus lift

O objetivo desse trabalho foi identificar em radiografias panorâmicas estruturas anatômicas que interfiram no procedimento cirúrgico de levantamento de seio maxilar, mais precisamente septos intersinusais, raízes e invaginações radiculares do seio maxilar. Os métodos utilizados para analisar a frequência e o tipo de estrutura anatômica envolvida foram interpretação radiográfica e desenho radiográfico. As radiografias que foram consultadas pertencem ao curso de pós-graduação em Implantodontia da Unoesc/ Joaçaba. Os desenhos foram realizados na sala de radiologia para otimizar a interpretação, sob orientação e treinamento de um professor do curso de pós-graduação. A avaliação dos desenhos foi realizada também pelo mesmo professor em vários momentos, com intervalos semanais entre as avaliações para maior concordância possível. Os resultados encontrados foram similares aos encontrados na literatura para os septos, as invaginações do assoalho do seio maxilar e projeções radiculares mostraram índice significativo para interferência no levantamento de seio maxilar. O estudo mostrou falta de simetria para os casos avaliados. A presença de septos, invaginações do assoalho do seio maxilar e projeções radiculares são constantes e nem sempre simétricas, podendo gerar dificuldades na técnica como perfurações da membrana do seio maxilar. Para a técnica de levantamento de seio maxilar é necessário bom diagnóstico e planejamento para prevenir complicações transoperatórias.

The aim of this study was to identify anatomical structures on panoramic radiographs that interfere with the surgical procedure of maxillary sinus lifting, more precisely intersinusal septa, roots and root invaginations of the maxillary sinus. The methods used to analyze the frequency and type of anatomical structure involved were the radiographic interpretation and radiographic design. Radiographs that were found belong to the postgraduate course in Implantology of Unoesc/Joaçaba. The drawings were made in the radiology suite to optimize the interpretation under the guidance and training of a professor of graduate school. The evaluation of the designs was also carried out by a professor of postgraduate studies at various times at weekly intervals between assessments for a much agreement as possible. The results were similar to those found in the literature for the septa, the invaginations of the maxillary sinus floor and root projections show a significant index for interference in the maxillary sinus lifting. The study showed a lack of symmetry for the cases evaluated. The presence of septa, invaginations of the maxillary sinus floor and root projections are constant and not always symmetrical, and may cause difficulties in the technique as holes in the membrane of the maxillary sinus. The technique for maxillary sinus lifting is required a proper diagnosis and planning to prevent setbacks.

Enxerto ósseo interposicional: uma alternativa viável para ganho ósseo vertical / Interpositional bone graft: a viable alternative to vertical bone augmentation

Nos planejamentos cirúrgicos para a Implantodontia, diferentes abordagens terapêuticas são possíveis para o tratamento dos defeitos ósseos, quando relacionados a defeitos em espessura. Porém, quando nos deparamos com defeitos verticais, a resolução torna-se mais complexa, uma vez que as técnicas aposicionais de enxertia são deficientes para o ganho ósseo vertical. Para tanto, a utilização da técnica de osteotomias segmentares seguida de enxertos de interposição fornece previsibilidade e segurança clínica. Com o objetivo de demonstrar essa técnica, apresenta-se um caso clínico de osteotomia segmentar seguida de enxerto interposicional com hidroxiapatita sintética reabsorvível na região anterior da maxila

In planning for surgical implants, some therapeutic approaches are possible for treating bone defects in thickness. However, when facing vertical defects, the resolution becomes more complex, since appositional grafting techniques are deficient for vertical bone gain. Therefore, using the technique of segmental osteotomies followed by interposition grafts provides predictable and clinically safe resolution. To demonstrate this technique, this paper presents a case of segmental osteotomy followed by interpositional graft with resorbable synthetic hydroxyapatite in the anterior maxilla

Estudo com desenho split-mouth com enxertos onlay de bloco alógeno e autógeno na maxila para futura colocação de implantes osseointegrados: resultados tomográficos e histológicos / A split-mouth study on allogeneic and autogenic onlay bone grafts in the maxillary arch for further dental implant placement: CBCT and histological results

O objetivo deste estudo foi verificar os resultados clínicos e histológicos de blocos onlay de osso autógeno e alógeno colocados na maxila. Um paciente feminino, 45 anos, recebeu, contralateralmente (split-mouth), blocos ósseos autógenos de ramo mandibular e blocos ósseos homógenos frescos congelados, de banco de ossos, e após oito e seis meses, respectivamente, para osso homógeno e autógeno, foi realizada a instalação de seis implantes. Clinicamente, observou-se maior reabsorção óssea nos blocos homógenos, com aspecto superficial mais irregular; já nos blocos autógenos, esta reabsorção foi menor, de aspecto superficial liso e contínuo. No momento da instalação dos implantes, observou-se menor densidade e/ou resistência ao corte nos blocos homógenos, porém, não alterando a estabilidade primária dos implantes; em ambos os blocos obteve-se 40 Ncm. Histologicamente, nos tempos utilizados de oito e seis meses, respectivamente para homógeno e autógeno, o resultado obtido na análise das lâminas foi muito semelhante, com presença de osteócitos aprisionados na matriz óssea, evidenciando tecido vital em ambas as amostras

The aim of this study was to evaluate the clinical and histological outcomes of onlay bone block and allografts placed in the maxillary arch. A female, 45 years-old patient received mandibular autogenous bone blocks and fresh-frozen allogenic grafts in a split-mouth design. After eight and six months for homogenous and autogenous bone, respectively, six dental implants were installed. Clinically, greater bone resorption was observed in the homogenous blocks, with more irregular surface aspect; in the autogenous blocks, the reabsorption degree was lower and smooth with a continuous surface. Upon implant placement, lower density and cutting resistance were seen in homogenous blocks, although not changing the final implant primary stability (40Ncm). Histologically, the obtained results were very similar, with the presence of osteocytes trapped into the bone matrix, showing vital tissue after eight and six months in both groups.