Sn-Beta zeolites, with high Sn content and smaller crystal size, hydrothermally synthesized in F−-free medium using N-cyclohexyl-N,N-dimethylcyclohexanaminium hydroxide as the structure-directing agent with the assistance of Na+ and seed, are highly active as Lewis acid catalysts.

Early infection and peri‐implantitis after implant restoration are major reasons for dental implant failure. Implant‐associated infections are majorly attributed to biofilm formation. In this study, co‐incorporated zinc‐ (Zn‐) and strontium‐ (Sr‐) nanorod coating on sandblasted and acid‐etched (SLA) titanium (SLA‐Zn/Sr) was fabricated by hydrothermal synthesis. It was aimed at promoting osteogenesis while inhibiting biofilm formation. The nanorod‐like particles (φ 30–50 nm) were found to be evenly formed on SLA‐Zn/Sr (Zn: 1.49 ± 0.16 wt%; Sr: 21.69 ± 2.74 wt%) that was composed of well‐crystallized ZnTiO3 and SrTiO3 phases. With a sufficient interface bonding strength (42.00 ± 3.00 MPa), SLA‐Zn/Sr enhanced the corrosion resistance property of titanium. Besides, SLA‐Zn/Sr promoted the cellular initial adhesion, proliferation and osteogenic differentiation of rBMSCs in vitro while inhibiting the adhesion of Staphylococcus aureus and Porphyromonas gingivalis . In addition, through down‐regulating icaA gene expression, this novel surface reduced the secretion of polysaccharide intercellular adhesion (reduced by 87.9% compared to SLActive) to suppress the S. aureus biofilm formation. We, therefore, propose a new chemical modification on titanium for multifunctional implant material development. Due to the Zn/Sr co‐doping in coating, material properties, early osteogenic effect and antibacterial ability of titanium can be simultaneously enhanced, which has the potential to be applied in dental implantation in the future.

Objective To evaluate the long‐term integrity of implant–abutment complexes in implant systems with two internal conical angles. Material and Methods 12,538 bone‐level implants of two systems placed between January 2012 and December 2018 were retrospectively analyzed. Cumulative abutment/implant fracture rates in systems with larger (LA, 7.5°) and smaller (SA, 5.7°) internal conical angles were estimated using the Kaplan–Meier analysis and compared between groups. The association between implant systems and jammed abutment retrievability was evaluated by multivariable generalized estimating equation logistic regression modeling. Results For LA, the 8‐year cumulative incident rate was 0.10% (95% confidence interval (CI): 0–0.24%) for implant fracture and 0.26% (95% CI: 0.11%–0.41%) for abutment fracture, demonstrating a significant difference in gender (p = .03), implant diameter (p = .01), jaw (p = .006), and antagonist tooth (p < .001). For SA, the 8‐year cumulative incident rate was 0.38% (95% CI: 0–0.79%) for implant fracture and 2.62% (95% CI: 0.05%–5.13%) for abutment fracture, which was influenced by implant diameter (p < .001) and site (p = .03). The cumulative implant/abutment fracture rate was lower for LA implants, particularly for LA implant‐supported single crowns (SCs) (p < .05). The abutment‐retrieval success rate was 92.9% for LA and 57.1% for SA (p = .055). Conclusion LA implants exhibited a lower incidence of fracture in abutment–implant complexes and a relatively higher retrievability success rate for jammed abutments.

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