Effectiveness of bilayer porous polyethylene membrane for alveolar ridge preservation: A randomized controlled trial

Abstract

Background Porous polyethylene has been successfully used in several medical applications with good outcomes. Based on this, a new bilayer porous polyethylene membrane (B‐PPM) was developed for possibly being used as a membrane in alveolar ridge preservation. Purpose To evaluate the clinical efficacy of a new B‐PPM in comparison to high‐density polytetrafluoroethylene membrane (d‐PTFE) in alveolar ridge preservation. Materials and methods Thirty patients were randomized into two groups according to the membranes used to cover the socket (B‐PPM or d‐PTFE). Wound healing was monitored at day 1, 3, 7, 14, 28, and 4 months postoperatively. Dimensional changes of alveolar ridge were measured immediately after tooth extraction and at 4 months later using intraoral scanner and cone beam computed tomography. Bone cores were harvested before implant placement. Implant stability at insertion and prior to prosthesis delivery were also measured. Results No significant difference in socket wound closure between groups was observed excepting at day 14 that B‐PPM showed a faster wound closure than d‐PTFE (P = .03). Greater bone resorptions were seen on buccal than lingual side and on coronal than apical part of the alveolar ridge. No significant difference in dimensional changes of alveolar ridge, new bone formation, connective tissue content, residual bone grafts, and implant stability between two groups. Conclusion B‐PPPM was safe and effective for alveolar ridge preservation.

Soft tissue dimensional changes after alveolar ridge preservation using different sealing materials: a systematic review and network meta-analysis

“…The IRR score from Cohen’s k statistic at the full text article selection stage was 0.81 (81%), suggestive of substantial agreement between the reviewers. Overall, 22 articles were included in the qualitative synthesis [ 18 , 24 – 44 ]. All included studies were RCTs and are described in detail in Table 1 and Table 2 .…”

“…In that study, the difference between micro-CT and STL measurements was always between 0.05 and 0.07 mm with Lin’s concordance correlation coefficient between 0.80 and 0.90 [ 53 ]. Three included studies [ 38 , 43 , 44 ] superimposed STL files on CBCT files to monitor soft tissue dimensional changes, which is likely a better way to isolate the soft tissue dimensional changes as opposed to just utilizing STL files alone which do not allow for an accurate analysis of soft tissue dimensional changes.…”

Customized 3D printed nanohydroxyapatite bone block grafts for implant sites: A case series

“…No significant resorption or nonfixation of the graft was observed. The same method of measurement was used as in previous studies [51,52]. Mean maximum horizontal bone gain was 3.56 ± 0.45 mm.…”

Avaliação das alterações dimensionais horizontais dos tecidos mole e ósseo por meio de diferentes técnicas de preservação do rebordo alveolar

“…Não obstante, esses resultados estão de acordo com a maioria dos estudos, que demonstram sempre haver uma perda dimensional no plano horizontal desses alvéolos, como comprovam os trabalhos (Jung et al, 2013;Araújo et al, 2015;Kauffmann et al, 2020;Wongpairojpanich et al, 2021) procedimento. E semelhantemente ao presente estudo, a largura horizontal dos rebordos estudados foram medidas em três pontos a partir da crista óssea, a 1, 3 e 5 mm.…”

“…Membranas não reabsorvíveis também podem ser empregadas, como a membrana de polipropileno que é bioinerte, impermeável e possui uma consistência capaz de evitar o colapso de tecidos mantendo o arcabouço para a formação e manutenção de coágulo (Salomão, Siqueira, 2009). Essa membrana tem sido usada com sucesso em diversas aplicações médicas com bons resultados (Wongpairojpanich et al, 2021) ou de politetrafluoretileno expandido ou PTFEe (PTFEe reforçado com titânio ou de alta densidade) que consiste em um polímero estável e inerte que não provoca reações adversas, porém, necessitam de uma segunda intervenção para serem removidas (Jovanovic, 1995;Bartee, 2001;Dinato et al, 2011;Zoio, 2013).…”