scholarly journals Indirect Sinus Augmentation With and Without the Addition of a Biomaterial

2019 ◽  
Vol 28 (6) ◽  
pp. 571-577 ◽  
Author(s):  
Hai Anh Trinh ◽  
Van Viet Dam ◽  
Bach Le ◽  
Pisha Pittayapat ◽  
Pasutha Thunyakitpisal
Keyword(s):  
Author(s):  
Gustavo V. O. Fernandes

RESUMO O advento da osseointegração e dos implantes dentários revolucionaram o tratamento e a reabilitação protética de pacientes edêntulos totais e parciais. Obstáculos anatômicos tais como o seio maxilar pneumatizado impediam a instalação imediata de implantes. Com o avanço da implantodontia, técnicas cirúrgicas para a reconstrução de rebordos, tais como o levantamento de seio maxilar, foram introduzidas, ampliando as possibilidades de tratamento. Esta técnica consiste no ganho ósseo a partir do assoalho do seio maxilar com a colocação de um material de enxertia. Para melhorar a reparação óssea, diversos estudos avaliaram os efeitos dos fatores de crescimento e de diferenciação tais como PDGF, VEGF, TGF, EGF, entre outros. Estes fatores são produzidos pelas plaquetas. O plasma rico em plaquetas (PRP), um concentrado autógeno de plaquetas humanas, vem sendo utilizado com destaque na prática clínica há mais de 15 anos a fim de otimizar a neoformação óssea quando associado aos enxertos. No entanto, ainda existe uma grande controvérsia acerca de sua eficácia. Assim, o objetivo deste estudo foi realizar a revisão sistemática da literatura sobre a eficácia do PRP associado ao xenoenxerto Bio-Oss® (osso bovino desproteinizado) em cirurgias de levantamento de seio maxilar. A busca com palavras-chaves [(PRP) OR (Platelet-Rich Plasma) AND Sinus Lift) OR (Sinus Lifting) OR (Sinus Augmentation) AND (Bio-Oss)] na base de dados PubMed retornou 189 artigos dos quais inicialmente foram encontrados 9 artigos sobre o tema em questão. Destes, apenas 2 artigos foram enquadrados nos critérios de elegibilidade e foram incluídos para análise final e discussão. Constatou-se que diversos estudos apresentaram falhas metodológicas comprometendo a confiabilidade dos resultados. Nos artigos considerados, observou-se que os resultados são contraditórios. Em uma avaliação de qualidade dos estudos enquadrados para análise, um foi classificado como de baixo risco de viés e o outro foi classificado como de alto risco de viés. Conclui-se que há grande carência de artigos sobre este assunto e que novos estudos clínicos que há grande carência de artigos sobre este assunto que há grande carência de artigos sobre este assunto e que novos estudos clínicos devem ser realizados com metodologias que considerem, por exemplo, randomização dos grupos e cegamento das análises. Palavras-Chave: PRP, plaquetas, Bio-Oss, Levantamento de seio maxilar, Revisão Sistemática


Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2159
Author(s):  
Giovanna Iezzi ◽  
Antonio Scarano ◽  
Luca Valbonetti ◽  
Serena Mazzoni ◽  
Michele Furlani ◽  
...  

Maxillary sinus augmentation is often necessary prior to implantology procedure, in particular in cases of atrophic posterior maxilla. In this context, bone substitute biomaterials made of biphasic calcium phosphates, produced by three-dimensional additive manufacturing were shown to be highly biocompatible with an efficient osteoconductivity, especially when combined with cell-based tissue engineering. Thus, in the present research, osteoinduction and osteoconduction properties of biphasic calcium-phosphate constructs made by direct rapid prototyping and engineered with ovine-derived amniotic epithelial cells or amniotic fluid cells were evaluated. More in details, this preclinical study was performed using adult sheep targeted to receive scaffold alone (CTR), oAFSMC, or oAEC engineered constructs. The grafted sinuses were explanted at 90 days and a cross-linked experimental approach based on Synchrotron Radiation microCT and histology analysis was performed on the complete set of samples. The study, performed taking into account the distance from native surrounding bone, demonstrated that no significant differences occurred in bone regeneration between oAEC-, oAFMSC-cultured, and Ctr samples and that there was a predominant action of the osteoconduction versus the stem cells osteo-induction. Indeed, it was proven that the newly formed bone amount and distribution decreased from the side of contact scaffold/native bone toward the bulk of the scaffold itself, with almost constant values of morphometric descriptors in volumes more than 1 mm from the border.


Author(s):  
Shingo Kato ◽  
Daniele Botticelli ◽  
Enzo De Santis ◽  
Masatsugu Kanayama ◽  
Sabrina Ferreira ◽  
...  

2021 ◽  
Vol 9 (6) ◽  
pp. 65
Author(s):  
Michael Medeiros Costa ◽  
Daniele Botticelli ◽  
Ofer Moses ◽  
Yuki Omori ◽  
Shigeo Fujiwara ◽  
...  

Background: Due to the lack of data comparing the biological behavior of two formulations, granules and paste, of alloplastic graft from microtomographic and histomorphometric points of view, the aim of the present experiment was to compare the histomorphometric and microtomographic healing of two formulations, i.e., granules (MR sites) or paste (MR-inject sites) of an alloplastic graft composed of a combination of beta-tricalcium phosphate and hydroxyapatite used for maxillary sinus lifting. Methods: A sinus lifting procedure was carried out bilaterally in 20 rabbits, and the elevated space was filled with either paste or granules of an alloplastic material. A collagen membrane was placed on the antrostomy and the animals were euthanized after 2 or 10 weeks, 10 animals each group. Microtomographic and histological analyses were performed. Results: Higher proportions of new bone formation were found at the MR, compared to the MR-inject sites both after 2 weeks (2.65 ± 2.89% vs. 0.08 ± 0.12%; p < 0.01) and 10 weeks of healing (34.20 ± 13.86 vs. 23.28 ± 10.35%; p = 0.022). Conclusions: It was concluded that new bone formation was faster in the MR sites, compared to the MR-inject. However, a longer time of healing should be allowed to make final conclusions about the efficiency in bone formation of the paste formulation of the biomaterial used in the present study.


2021 ◽  
Vol 10 (7) ◽  
pp. 1360
Author(s):  
Won-Bae Park ◽  
Ji-Young Han ◽  
Kyung Lhi Kang

Maxillary sinus floor augmentation (MSFA) is widely used and considered a predictable procedure for implant placement. However, the influence of MSFA on implant survival and marginal bone loss (MBL) is still inconclusive. The purpose of this retrospective observational study is to evaluate the long-term genuine influence of MSFA on the survival and MBL of implants by comparing those with and without MSFA only in maxillary molars within the same patients. Thirty-eight patients (28 male and 10 female), with a total of 119 implants, received implants with and without MSFA, and were followed up for 5.8 to 22 years. Patient- and implant-related factors were assessed with a frailty model for implant survival and with generalized estimation equations (GEE) for MBL around the implant. No variables showed a statistical significance for implant failure in the frailty model. In GEE analysis for MBL, MSFA did not show any statistical significance. In conclusion, MSFA demonstrated no significant influence on implant failure and MBL in posterior maxilla in this study.


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