Abstract:One of the major and important challenges in dental composite resin and restoration is the mechanical performance and property of materials. Nanotechnology can produce nanoscale materials that are used in dentistry to help stabilize and strengthen the dentistry. In this work, we study the synthesis and characterization of PLA/Al 2 O 3 nanoscaffold in different conditions such as concentration, temperature, pH, microwave power and irradiation time. PLA/Al 2 O 3 nanoscaffolds were prepared by a micelle-assisted … Show more
“…Ranjbar et al. observed increased flexural strength, modulus, and compressive strength in PLA/Al 2 O 3 nano-scaffolds compared to traditional resins [44] . The composite material was synthesized through crosslinking the polymer with Al 2 O 3 nanoparticles.…”
Section: Applicationsmentioning
confidence: 99%
“… Fig. 6 Illustration of the fabrication process of PLA/Al 2 O 3 nanoscaffolds for resin composites [44] . Fig.…”
Polylactic acid (PLA) is a versatile biopolymer. PLA is synthesized with ease from abundant renewable resources and is biodegradable. PLA has shown promise as a biomaterial in a plethora of healthcare applications such as tissue engineering or regenerative medicine, cardiovascular implants, dental niches, drug carriers, orthopedic interventions, cancer therapy, skin and tendon healing, and lastly medical tools / equipment. PLA has demonstrated instrumental importance as a three-dimensionally (3D) printable biopolymer, which has further been bolstered by its role during the Coronavirus Disease of 2019 (Covid-19) global pandemic. As an abundant filament, PLA has created desperately needed personal protective equipment (PPE) and ventilator modifications. As polymer chemistry continues to advance, so too will the applications and continued efficacy of PLA-based modalities.
“…Ranjbar et al. observed increased flexural strength, modulus, and compressive strength in PLA/Al 2 O 3 nano-scaffolds compared to traditional resins [44] . The composite material was synthesized through crosslinking the polymer with Al 2 O 3 nanoparticles.…”
Section: Applicationsmentioning
confidence: 99%
“… Fig. 6 Illustration of the fabrication process of PLA/Al 2 O 3 nanoscaffolds for resin composites [44] . Fig.…”
Polylactic acid (PLA) is a versatile biopolymer. PLA is synthesized with ease from abundant renewable resources and is biodegradable. PLA has shown promise as a biomaterial in a plethora of healthcare applications such as tissue engineering or regenerative medicine, cardiovascular implants, dental niches, drug carriers, orthopedic interventions, cancer therapy, skin and tendon healing, and lastly medical tools / equipment. PLA has demonstrated instrumental importance as a three-dimensionally (3D) printable biopolymer, which has further been bolstered by its role during the Coronavirus Disease of 2019 (Covid-19) global pandemic. As an abundant filament, PLA has created desperately needed personal protective equipment (PPE) and ventilator modifications. As polymer chemistry continues to advance, so too will the applications and continued efficacy of PLA-based modalities.
“…Considering the involvement of biomedical research with human studies and the general scarcity of information in this regard, especially in dental field in Iran, and in continuing our interest in medical research [12,13], the present study aimed to assess the knowledge and attitude of Kerman Medical University dental students about research ethics.…”
Objective: To evaluate the knowledge and attitude of the students of Kerman dental school (Iran) about ethics in dental research. Material and Methods: This cross-section study was conducted on 307 dental students selected through the census sampling method. Data were collected by a researcher-made questionnaire consisting of 12 items about knowledge and 17 items about attitude toward research ethics. Data analyzed in SPSS software using t-test and linear regression test. P-values of less than 0.05 were considered statistically significant. Results: Of the respondents, 33.9% were male and 66.1% were female, and 44% had good knowledge and 20.8% had a positive attitude about research ethics. A significant correlation was found between knowledge and attitude. A significant correlation was also observed between knowledge and participation in research workshops. Knowledge and attitude showed no significant correlation with gender or year of admission. Conclusion: Participants had appropriate knowledge and attitude about research ethics. There is some room for improvement in research ethics education concerning experimental works and retrospective studies on biologic samples. Holding research workshops with an introduction to ethical codes of research is recommended.
“…Regarding the group of biobased "synthetic polymers", we found poly(lactic acid) (PLA), poly(butylenes succinate) (PBS), bio-polyolefins (bio-PP, bio-PE), and bio-poly(ethylene terephtalic acid) (bio-PET). In this group, PLA and PBS are biodegradable/compostable polymers, and PLA is the most promising biodegradable polymer for different applications, such as food packaging [8,9], automotive applications [10], and biomedical applications [11,12], among others. Bio-PP, bio-PE, and bio-PET are not biodegradable materials, and the only contribution for reducing environmental impact comes from reducing the carbon footprint.…”
There is a strong public concern about plastic waste, which promotes the development of new biobased materials. The benefit of using microbial biomass for new developments is that it is a completely renewable source of polymers, which is not limited to climate conditions or may cause deforestation, as biopolymers come from vegetal biomass. The present review is focused on the use of microbial biomass and its derivatives as sources of biopolymers to form new materials. Yeast and fungal biomass are low-cost and abundant sources of biopolymers with high promising properties for the development of biodegradable materials, while milk and water kefir grains, composed by kefiran and dextran, respectively, produce films with very good optical and mechanical properties. The reasons for considering microbial cellulose as an attractive biobased material are the conformational structure and enhanced properties compared to plant cellulose. Kombucha tea, a probiotic fermented sparkling beverage, produces a floating membrane that has been identified as bacterial cellulose as a side stream during this fermentation. The results shown in this review demonstrated the good performance of microbial biomass to form new materials, with enhanced functional properties for different applications.
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