Avaliação retrospectiva de 774 implantes cônicos de hexágono externo e interno, de superfície jateada com Al2O3 seguido de três ataques ácidos: acompanhamento clínico de sete anos / Retrospective evaluation of 774 external and internal hexagonal tapered surface dental implants with Al2O3 surface treatment followed by three acid-etching protocols: a 7-year follow-up

Objetivo: analisar o sucesso do tratamento através de implantes cônicos de hexágono externo e interno, de superfície jateada com Al2O3 seguido de três ataques ácidos, com acompanhamento clínico de sete anos. Material e métodos: foi realizado um estudo retrospectivo aprovado pelo comitê de ética da Universidade de Guarulhos, entre os anos de 2009 e 2016, no qual foram selecionados 136 pacientes após os critérios de inclusão e exclusão, sendo instalados 774 implantes cônicos de hexágono externo e interno nos maxilares. Após o tempo de osseointegração, os implantes receberam as coroas protéticas finais. Resultados: a avaliação retrospectiva de 774 implantes cônicos de hexágono externo e interno, de superfície jateada com Al2O3 seguido de três ataques ácidos, com um acompanhamento clínico de sete anos, resultou em índices totais de sucesso na osseointegração de 98,39%, com uma perda óssea marginal de 1,08 mm após este período. Conclusão: a previsibilidade de sucesso no tratamento através dos implantes cônicos de hexágono externo e interno, de superfície jateada com Al2O3 seguido de três ataques ácidos, foi de 98,3%. A qualidade óssea é fundamental na previsibilidade do tratamento.

Objective: to analyze the treatment success of Al2O3 sandblasted, acid-etched, external and internal tapered connection dental implants after 7 years of follow-up. Material and methods: upon approval by the Ethics Committee of the University of Guarulhos, a retrospective study involving 136 patients receiving 774 dental implants in the jaws was performed. After the osseointegration period, definitive prosthetic restorations were delivered. Results: after 7 years of follow-up, the overall success rate was of 98.33% with a marginal bone loss of 1.08 mm. Conclusion: the treatment predictability of alumina sandblasted, external and internal tapered implants was significant. Bone quality is fundamental for treatment success.

Impact of Different Implant Surfaces Topographies on Peri-Implant Tissues: An Update of Current Available Data on Dental Implants Retrieved from Human Jaws.

The high success range obtained with the implant-supported restorations has improved its applicability on routine of the daily clinical practice. This elevated percentage of success is related to the previous pre-clinical data obtained from animal and in vitro studies that evaluated the impact of implant surface topographies on bone tissue. However, the histological evaluation of human bone tissue is scarce. Therefore, the aim of this review is to depict an actual panorama of the data available on boneto- implant contact (BIC) of retrieved implants from human jaws. Some aspects of implant surface topography as well as systemic conditions as osteoporosis and smoking habit were demonstrated to have a strong impact, suggesting that the data obtained from human bone tissue is still valuable for the better understanding of the osseointegration process. This article also highlighted that most data in humans are difficult to interpret, due to the lack of detailed information about the surfaces found in retrieved implants. Without the definition of the surface characteristics, it is difficult to link exactly the surface patterns to specific clinical observations, and all observations remain de facto incomplete. As a conclusion, data from implants retrieved from human jaws are very important for our understanding, however the studies remain scarce and data is fragmented. This important approach should be improved, completed and developed in the future.

Short (6-mm) dental implants versus sinus floor elevation and placement of longer (≥10-mm) dental implants: a randomized controlled trial with a 3-year follow-up.

OBJECTIVES: To investigate whether short (6-mm) dental implants could be an alternative to sinus floor elevation (SFE) and placement of longer (≥10-mm) implants in the posterior maxilla. MATERIALS AND METHODS: Over a 3-year period, all patients presenting with partial edentulism in the posterior maxilla were considered for inclusion in this randomized controlled trial. Patients were randomly chosen either to receive short (6-mm) implants (test group [TG]) or to undergo SFE with simultaneous placement of standard-length (≥10-mm) implants (control group [CG]). SFE was performed using the lateral technique. In both groups, tapered implants (AnyRidge, MegaGen, Gyeongbuk, South Korea) were placed. All implants were loaded after 4 months of healing. At each annual follow-up session, clinical and radiographic parameters were assessed. Primary outcomes were implant survival, stability (measured with the implant stability quotient [ISQ]), marginal bone loss (MBL), and complications; secondary outcomes were patient satisfaction and treatment time and cost. RESULTS: Thirty-three patients were assigned to the TG and 20 to the CG. Forty-five implants were inserted in each group. At 3 years, implant survival rates were 100% and 95.0% for the TG and CG, respectively; this difference was not statistically significant (P = 0.38). The mean ISQ values of the TG and CG did not differ at placement (68.2 vs. 67.8, P = 0.1), at delivery of the final restoration (69.5 vs. 69.4, P = 0.9), and after 1 year (71.0 vs. 71.5, P = 0.1); at 3 years, the CG had a significantly higher mean ISQ than the TG (72.4 vs. 71.6, P = 0.004). Mean MBL was significantly higher in the CG than in the TG, both at 1 year (0.14 mm vs. 0.21 mm, P = 0.006) and at 3 years (0.20 mm vs. 0.27 mm, P = 0.01). A few complications were reported. Surgical time and cost were significantly higher in the CG than in the TG (P < 0.0001). Patient satisfaction was high in both groups. CONCLUSIONS: In this randomized controlled trial, results for short (6-mm) implants were similar to those for longer (≥10-mm) implants in augmented bone. Short implants might be preferable to SFE, because the treatment is faster and less expensive. Long-term randomized controlled trials are required to confirm these results.