Restoration System Research Articles

Landsenses Ecology: A New Idea for Watershed Ecology Restoration

Watershed ecology restoration is the key to solving the ecological and environmental problems of watersheds and achieving sustainable development. As one direction of the frontiers of ecology, landsenses ecology is supported by science and technology and cares for humans. It has a great significance for enhancing the human habitat and achieving sustainable development. Combining landsenses ecology and the technical process of watershed ecology restoration allows the integration of people's visions into the system of strategies and applied technologies for watershed ecology restoration while ensuring the restoration of the ecological functions of watersheds. It is a complement to the traditional ecosystem restoration model. This study establishes the connection between landsenses ecology and watershed ecology restoration in terms of goals, models and focus of attention. It aims to construct an indicator system of restoration with the application of landsenses ecology, form a complete process of ecological restoration with the integration of landsenses ecology and apply it to the ecological restoration of watershed elements with relatively intensive human activity such as urban green areas, buildings and wetlands (rivers and lakes). Rather than just always emphasizing natural ecology, landsenses ecology treats human beings as part of nature. It tries to establish a more comprehensive, humanized ideal restoration model by taking "human perceptions" into consideration. Through a restoration process based on long-term and continuous coordination, feedback and improvement, it can improve the ecological benefits of the watershed and improve residents' well-being, so as to ultimately realize the establishment of a "community of life between man and nature".

Implementation of Restorative Justice on Elderly Actors in Criminal Law Enforcement Based on Justice Value in Indonesia

This study aims to analyze regulations related to the formulation of regulations on the application of criminal sanctions against elderly perpetrators, which at this time it is still possible to be sentenced to imprisonment which causes injustice to elderly people. So, it needs fair law enforcement. This study uses the constructivism paradigm, the type of research in the form of doctrinal law, and a juridical -normative approach. The data used in this study are secondary data obtained by conducting literature studies on various regulations and books, research results and various journals. The data obtained was then analyzed using a qualitative descriptive method. The results of this study are that criminal sanctions against elderly perpetrators (elderly) are still considered not fulfilling the principle of justice because the elderly factor as a judge's consideration in sentencing must look at Indonesia's positive legal arrangements, namely the Criminal Code. For now, the Criminal Code does not specifically regulate the factor of old age as a judge's consideration in sentencing. Thus, for criminal cases involving the defendant who is an elderly person, in applying positive law, the judge must look at the values and sense of justice that grow in society. The values here are related to social values that exist in society, namely, what is desired that influences social behavior and has a functional power in the development of life that has been going on for a long time in the habits of behavior in everyday life, while the sense of justice that grows in society reflects the form of the balance of social values in society in law. Weaknesses related to regulatory arrangements for the application of criminal sanctions against elderly offenders (elderly) at this time since the Criminal Code still adheres to a retributive system and the Restorative System has not yet been regulated. Justice in the Criminal Code Against Elderly Actors. Weaknesses in terms of legal structure due to factors Law Enforcement Officials tend to have a positivistic view of law and the rights of the elderly in the criminal system are still neglected. Weaknesses in terms of legal culture are due to the Psychological Consideration Factors of the Elderly and the Legal Awareness factor of the Elderly Community which is still lacking.

Evaluation method for the assessment of artificial coast ecological level: Typical coasts of Tianjin, China

Ecological problems such as coastal damage and hardening are prominent and can be influenced by human activity. It is necessary to carry out ecological restoration tailored to specific coastal ecological conditions. To obtain comparable evaluation results for coast ecological level and analyze the influencing factors, this study presented an evaluation method based on the ecological scenarios of coast sub-parts according to the structural heterogeneity of coast cross-sections. An empirical study of nine typical artificial coasts of Tianjin, China, determined that under the unified assessment guidelines, the overall ecological level of the living coasts was the highest, with fishery coasts being second highest. Meanwhile, the ecological level of the general defense coasts was poor; The load values of each principal component were obtained through principal component analysis, and the significant factors affecting the ecological level of the coast were selected. An orientation system for the ecological restoration of the typical artificial coasts of Tianjin was then established accordingly, which would be useful for guiding future ecological restoration work in coastal areas.

What Promotes Natural Forest Protection and Restoration? Insights from the Perspective of Multiple Parties

The natural forest protection and restoration (NFPR) system is imperfect due to contradictions between the objectives of natural forest protection and the reality of situations, outdated cultivation concepts, conflicting interests among participating parties, and the lack of regulation guarantees and assessment criteria. These problems are not only common in China but also in international forest protection. As the NFPR system is more focused on the protection of natural forests, the level of natural forest restoration in China has been poor, with low natural forest quality and forest productivity. At the same time, the value of natural forest ecosystem services does not match the demand of farmers, forest management, and other multiple participating parties. As a result, except for the government, other multiple parties lack the intrinsic motivation to participate in NFPR, ultimately forming a sustainable management dilemma. Under the institutional analysis and development (IAD) framework, the objective of this research was to explore the influencing factors and outcomes of the participation of multiple parties in NFPR and to construct a multiple parties’ participation mechanism for solving this dilemma. This research found that among external variables, multiple parties’ characteristics, biophysical conditions, attributes of community, and rules-in-use jointly influence and constitute the driving mechanism of multiple parties’ participation in NFPR. The rules-in-use directly impact the participation action scenario and regulate the other three external variables. Various factors and mechanisms in NFPR interact in the action space and produce outcomes that create positive incentives for each external variable, thus promoting the whole mechanism to achieve a virtuous cycle of sustainable management. This study provides a theoretical contribution to understanding the behavior of multiple parties participating in NFPR.

Development of insulation moisture level criteria as a result of technological progress in the maintenance system of oil-filled transformers

Transformers are critical elements of electrical networks and systems. The operational reliability of oil-filled transformers largely depends on the characteristics of the insulation, which is confirmed by the failure statistics. A number of factors affecting the insulation of electrical machines are identified, including excessive moisture, with its negative consequences outlined. The complexity and shortcomings of the use of traditional technologies for drying solid insulation are indicated, which focus on the search and implementation of the latest technologies in the system of maintenance and repair of transformers — automated insulation restoration systems (AIRS).Taking into account the development of technical progress in the field of service maintenance of transformers, the negative impact of moisture on the reliability, durability and overload capacity of electrical machines, especially those beyond their normal service life, a new look at the criteria for the moisture content of cellulose insulation is proposed. A review is made of the normative requirements for the moisture content of the insulation of oil-filled transformers of a number of Russian and foreign standards. On the basis of the Oommen equilibrium curves, the shortcomings of the lack of comparability of the humidity criteria for solid and liquid insulation in STO 34.01–23.1– 001–2017 and RD 34.45–51.300–97 are presented. It is proposed to single out several areas of the operational state of transformers in terms of “moisture content of solid insulation (paper)”. The optimal period for the use of AIRS has been determined.The AIRS technology is implemented in a TRANSEC module, which enables to carry out work under load, without adversely affecting predictive diagnostics. The design features of the TRANSEC module, the principle of operation, functional and design differences from standard transformer units – thermosiphon /adsorption filters — are outlined. The results of testing the TRANSEC technology in an existing electrical installation serviced by PJSC Rosseti are presented. Six months of trial operation of the TRANSEC module demonstrated the restoration of insulation characteristics on operating equipment without additional involvement of personnel. Besides, during the testing of the TRANSEC technology, the influence of oil temperature on the information content of the assessment of solid insulation parameters was confirmed. Proposals are formulated on the revision of industry documentation in the established part.

Pulse-based cropping systems for soil health restoration, resources conservation, and nutritional and environmental security in rainfed agroecosystems.

Pulses are an important source of energy and protein, essential amino acids, dietary fibers, minerals, and vitamins, and play a significant role in addressing global nutritional security. The global pulse area, production, and average productivity increased from 1961 to 2020 (60 years). Pulses are usually grown under rainfed, highly unstable, and complex production environments, with substantial variability in soil and environmental factors, high year-to-year output variability, and variation in soil moisture. Since the last six decades, there is not much satisfactory improvement in the yield of pulses because of their cultivation in harsh environments, coupled with their continuous ignorance of the farmers and governments in policy planning. As a result, the global food supplies through pulses remained negligible and amounted to merely ~1.0% of the total food supply and 1.2% of the vegan food system. In this situation, protein-rich food is still a question raised at the global level to make a malnutrition-free world. Pulses are a vital component of agricultural biological diversity, essential for tackling climate change, and serve as an energy diet for vegetarians. Pulses can mitigate climate change by reducing the dependence on synthetic fertilizers that artificially introduce nitrogen (N) into the soil. The high demand and manufacture of chemical fertilizers emit greenhouse gases (GHGs), and their overuse can harm the environment. In addition, the increasing demand for the vegetal protein under most global agroecosystems has to be met with under a stressed rainfed situation. The rainfed agroecosystem is a shelter for poor people from a significant part of the globe, such as Africa, South Asia, and Latin America. Nearly, 83% [over 1,260 million hectares (ha)] of cultivated land comes under rainfed agriculture, contributing significantly to global food security by supplying over 60% of the food. In rainfed areas, the limitation of natural resources with the shrinking land, continuous nutrient mining, soil fertility depletion, declining productivity factor, constantly depleting water availability, decreasing soil carbon (C) stock, augmented weed menace, ecological instability, and reduced system productivity are creating a more challenging situation. Pulses, being crops of marginal and semi-marginal soils of arid and semi-arid climates, require less input for cultivation, such as water, nutrients, tillage, labor, and energy. Furthermore, accommodation of the area for the cultivation of pulses reduces the groundwater exploitation, C and N footprints, agrochemical application in the cropping systems, and ill effects of climate change due to their inherent capacity to withstand harsh soil to exhibit phytoremediation properties and to stand well under stressed environmental condition. This article focuses on the role of pulses in ecological services, human wellbeing, soil, environmental health, and economic security for advanced sustainability. Therefore, this study will enhance the understanding of productivity improvement in a system-based approach in a rainfed agroecosystem through the involvement of pulses. Furthermore, the present study highlighted significant research findings and policy support in the direction of exploring the real yield potential of pulses. It will provide a road map to producers, researchers, policymakers, and government planners working on pulses to promote them in rainfed agroecosystems to achieve the United Nations (UN's) Sustainable Development Goals (SDGs).

CTCF-mediated chromatin looping is coupled to the formation of phase-separated transcriptional condensate.

The CCCTC-binding factor (CTCF) is thought as one of essential architectural proteins along with cohesin for chromatin loop formation in the mammalian genome structure. Recent live-cell imaging approaches have observed some key transcription factors form condensates in a manner of transcription dependence, while the spatial base of the transcriptional condensates in the genome structure has not been addressed. Here, we investigated whether the formation of transcriptional condensates is related to chromatin loop formation by CTCF. We used the auxin-inducible degron (AID) system for acute conditional depletion and restoration of CTCF. With RNA Polymerase II (Pol II) Hi-Chip, we found chromatin loops are dramatically reduced upon CTCF depletion, especially on super-enhancers. In addition, our super-resolution fluorescence imaging found that transcriptional condensates are mostly dissolved upon CTCF depletion, which come back upon CTCF restoration. Taken together, our results indicate that chromatin loop formation by CTCF is crucial to the formation of transcriptional condensates in the cell nucleus, as a spatial groundwork in the genome structure.

Factors affecting savanna and forest regeneration in pastures across the cerrado

The Cerrado region comprises the world's most biodiverse savanna and the largest cultivated pastures for cattle in Brazil. Forty percent of these pastures are unproductive or degraded, with bare soil and native vegetation increasingly replacing exotic forage grasses. This study sought to investigate the regeneration of native vegetation in the pastures of the Cerrado and to evaluate the contribution of biophysical, land management, and landscape attributes to this process. Across the Cerrado, we analyzed pasture plant communities and the attributes of pasture management intensification, fire events, landscape native vegetation cover, and climate and soil types of 93 active pastures and 15 abandoned pastures. For the abandoned pastures, time since abandonment was an additional variable. On actively cultivated pastures, savanna regeneration varied from 0 to 70%, with a diversity of herbs and woody species. Pasture management was the main predictor of savanna regeneration on cultivated pastures. On abandoned pastures, time since abandonment was the main predictor. Exotic grass cover had a strong negative relationship with savanna regeneration and they were present even in pastures abandoned for 44 years. Our study reveals the potential of natural regeneration of the Cerrado and its particular predictors. The occurrence of pastures with high natural regeneration indicates that national policies can promote native vegetation restoration and silvopastoral systems with predictable, low cost implementation.

Foreign Legal System of Ecological Restoration and Its Enlightenment to China

Foreign Legal System of Ecological Restoration and Its Enlightenment to China

Discussion on the construction of legal system for ecological restoration of territorial space

Discussion on the construction of legal system for ecological restoration of territorial space

Environmental factors influencing the competitiveness of the regional tourism and recreation sphere

The article emphasizes the significant role of environmental factors in the development of sustainable tourism. The essence of the competitiveness of the tourism and recreation sphere in the context of the environmental component is determined. The purpose of the article is to determine the environmental factors influencing the competitiveness of the tourism and recreation sphere of the region, evaluate them from the point of view of manageability, and determine the prerequisites for ensuring the sustainable development of the region. The main elements influencing the ecological stability of the tourism and recreation sphere are substantiated. Groups of managed and unmanaged environmental factors influencing the competitiveness of tourism and recreation are identified. The assessment of the competitiveness of the tourism and recreation sphere of the regions of Ukraine is based on the general methodological approaches used in the calculation of the travel and tourism competitiveness indices (The Travel & Tourism Competitiveness Index, TTCI). An algorithm and environmental indicators are defined. The results of the assessment of the impact of environmental factors on the competitiveness of the tourism and recreation sphere are presented. The article points out that in the conditions of the war and the post-war period, the assessment of the impact of environmental factors and the forecasting of their consequences on the competitiveness of the tourism and recreation sphere of the region is complicated by the need to carry it out from different positions: damage to natural resources and ecosystems; environmental pollution; loss of biodiversity; reconstruction of tourist identity. The following methods and strategies are proposed to contribute to the achievement of ecological development of the tourism and recreation industry: ensuring the sustainable use of natural resources; using environmentally friendly technologies and materials in hotels and other tourist infrastructure; developing ecotourism and other forms of tourism that contribute to the preservation of the natural environment and draw attention to environmental issues; applying the system of ecosystem restoration and waste minimization; developing ecological management of tourism; conducting environmental education among the local population and tourists.

长江三角洲生态环境脆弱带生态修复技术研究进展

PDF HTML阅读 XML下载 导出引用 引用提醒 长江三角洲生态环境脆弱带生态修复技术研究进展 DOI: 10.5846/stxb201912312842 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 南京市政府重点科技专项（长江生态文明发展史与战略研究（043013005001））；国家科技部重点专项目（2018YF0800201） Research progress on ecological restoration technology of ecological fragile zone of the Yangtze River Delta Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:我国长江三角洲作为中国第一大经济区，综合实力最强的经济中心，其城市化和工业化发展迅速，但在人类活动的高强度影响和干预下，该地区的资源环境问题日益突出：生态环境脆弱性程度的增高，脆弱性发展趋势的加快等等一系列问题严重影响着长江三角洲的可持续发展，该区域生态环境呈现出的脆弱性特征已成为我国新的生态环境脆弱带。基于长江三角洲自然、经济、社会和环境状况的数据基础，及国内外脆弱性综合评价指标（自然因素和人为因素），对长江三角洲进行生态环境评估发现该区域具体的生态环境问题主要为土壤污染、城区大气污染、水环境污染，以及地面沉降等。通过剖析长江三角洲4类生态环境问题（土壤污染、大气污染、水环境污染、地面沉降）的现状、形成的具体原因及带来的影响，结合国内外生态修复技术的研究成果，详细论述了该区域4类生态环境问题的生态修复技术类型（物理方法、化学方法、生物方法、生态方法）、基本原理及各自的优缺点，同时评估了不同生态修复技术在污染治理过程中的可行性、安全性、经济性，旨在以上述理论研究为参照标准评估该区域环境污染治理过程中生态修复技术的修复潜力，为长江三角洲生态环境问题的治理修复提供方案及理论参考。长江三角洲生态环境的健康发展需要多方面的努力，需要全体社会成员增强生态环境保护意识，需要建立健全的生态修复相关政策及法律法规，需要运用多学科交叉综合修复技术，需要修订生态修复理论体系和技术规范，以上措施旨在为我国长江三角洲生态文明建设和可持续发展提供技术保障，促进该区域生态环境保护与经济社会的协调发展。 Abstract:As the largest economic zone and the economic center with the strongest comprehensive strength in China, the Yangtze River Delta has developed rapidly in urbanization and industrialization. However, under the high-intensity influence and intervention of human activities, the resource and environmental problems in the region have become increasingly prominent:the increase of ecological environment vulnerability, the acceleration of vulnerability development trend and a series of problems have seriously affected the sustainable development of the Yangtze River Delta, the fragile characteristics of the regional ecological environment have become a new ecological environment fragile zone in China. Based on the data of the natural, economic, social and environmental conditions of the Yangtze River Delta and the comprehensive vulnerability assessment indicators at home and abroad (natural and human factors), the ecological environment assessment of the Yangtze River Delta was carried out. It was found that the specific ecological and environmental problems in the region mainly included soil pollution, urban air pollution, water environment pollution, land subsidence and so on. By analyzing the current situation, specific causes and impacts of four types of eco-environmental problems (soil pollution, air pollution, water environment pollution and land subsidence) in the Yangtze River Delta, combined with the research results of ecological restoration technology at home and abroad, the types of ecological restoration technology (physical method, chemical method, biological method and ecological method), basic principles, advantages and disadvantages of four types of eco-environmental problems in the region were discussed in detail. At the same time, the feasibility, safety and economy of different ecological restoration technologies in the process of pollution control were evaluated aiming to evaluate the restoration potential of ecological restoration technologies in the process of environmental pollution control in the region with the above theoretical research as the reference standard, so as to provide a scheme and theoretical reference for the treatment and restoration of ecological environmental problems in the Yangtze River Delta. The healthy development of the ecological environment in the Yangtze River Delta requires various efforts, all members of society need to enhance their awareness of ecological and environmental protection, establish sound policies, laws and regulations related to ecological restoration, apply interdisciplinary comprehensive restoration technology, and revise the theoretical system and technical specifications of ecological restoration. The above measures were designed to provide technical guarantee for the construction of ecological civilization and sustainable development in the Yangtze River Delta, and promote the coordinated development of ecological and environmental protection and economy and society in the region. 参考文献 相似文献 引证文献

Comparative Evaluation of Fracture Resistance of Maxillary Premolars with Class II Cavities Restored with Glass Hybrid Restorative System and Nanohybrid Composite Resin: An In-vitro Study

Introduction: Maxillary premolars are the most susceptible teeth to fracture if both marginal ridges are compromised. Composite restorations have performed remarkably in restoring the marginal ridges. However, it has certain disadvantages, thus to overcome this, modified glass ionomer based restorative materials with improved mechanical properties were introduced. Aim: To compare and evaluate the fracture resistance of maxillary premolars with class II Mesio-Occluso-Distal (MOD) cavities which received Glass hybrid restorative system and Nanohybrid Composite resin. Materials and Methods: The present study was an in-vitro study at KM Shah Dental College and Hospital, Vadodara, Gujarat from December 2019 to June 2020, on 30 Extracted Maxillary premolars were selected. Total samples were divided into group A (n=15) restored by glass hybrid restorative system and group B (n=15) restored by nanohybrid composite resin. Standardised class II MOD Cavity preparation was done in all the samples. The samples were subjected to a thermocycling procedure, and a universal testing machine measured the fracture resistance. Data obtained from all the samples was analysed by Independent sample t-test with a p-value set at less than 0.05. Results: In group A, mean fracture resistance (at mean force 947.07±236.41) was found to be greater than in Group B. However, the difference among the groups was not statistically significant with a p-value of 0.555. Conclusion: Glass Hybrid restorative system showed better fracture resistance than Nanohybrid Composite Resin in maxillary premolars with class II MOD Cavities.

A comparative life cycle assessment of dental restorative materials.

Different types of direct-placement dental materials are used for the restoration of structure, function and aesthetics of teeth. The aim of this research investigation is to determine, through a comparative cradle-to-gate life cycle assessment, the environmental impacts of three direct-placement dental restorative materials (DRMs) and their associated packaging. Three direct-placement dental materials; dental amalgam, resin-based composite (RBC) and glass polyalkenoate cements (GIC) are assessed using primary data from a manufacturer (SDI Limited, Australia). The functional unit consisted of 'one dental restoration' of each restorative system under investigation: 1.14g of dental amalgam; 0.25g of RBC (plus the adhesive = 0.10g); and 0.54g of GIC. The system boundary per restoration included the raw materials and their associated packaging materials for each DRM together with the processing steps for both the materials and packaging. The environmental impacts were assessed using an Egalitarian approach under the ReCiPe method using Umberto software and the Ecoinvent database. Nine different impact categories were used to compare the environmental performance of these materials. Dental amalgam had the highest impact across most of the categories, but RBC had the highest Global Warming Potential. The highest sources of the environmental impacts for each restorative material were: Amalgam, derived from material use; RBC, derived from energy use in processing material and packaging material; GIC, derived from material and energy use for packaging. Less intensive energy sources or more sustainable packaging materials can potentially reduce the impacts associated with RBC and GIC thus making them suitable alternatives to dental amalgam.

Indirect restorative systems-A narrative review.

The background and clinical understanding of the properties of currently available indirect restorative systems and fabrication methods is, along with manufacturer and evidence-based literature, an important starting point to guide the clinical selection of materials for tooth and/or implant supported reconstructions. Therefore, this review explores most indirect restorative systems available in the market, especially all-ceramic, along with aspects of manufacturing process, clinical survival rates, and esthetic outcomes. Progressive incorporation of new technologies in the dental field and advancements in materials science have enabled the development/improvement of indirect restorative systems and treatment concepts in oral rehabilitation, resulting in reliable and predictable workflows and successful esthetic and functional outcomes. Indirect restorative systems have evolved from metal ceramics and polymers to glass ceramics, polycrystalline ceramics, and resin-matrix ceramics, aiming to improve not only biological and mechanical properties, but especially the optical properties and esthetic quality of the reconstructions, in attempt to mimic natural teeth. Based on several clinical research, materials, and patient-related parameters, a decision tree for the selection of indirect restorative materials was suggested to guide clinicians in the rehabilitation process. The pace of materials development is faster than that of clinical research aimed to support their use. Since no single material provides an ideal solution to every case, professionals must continuously seek information from well designed, long-term clinical trials in order to incorporate or not new materials and technological advancements.

Adaptive Lightweight License Plate Image Recovery Using Deep Learning Based on Generative Adversarial Network

Many Convolutional Neural Networks (CNNs) methods have already surpassed traditional approaches to image restoration tasks. Those CNNs models were usually designed to enhance single tasks such as an image resolution (super-resolution) or image denoising, but we came up with unconventional goals, that is, multiple recovery tasks from a single network design. Although the Transformer design has recently gained attention in image recovery task but they are too slow. In order to work with license plate images from a traffic camera stream, the system has to be fast. So, we proposed a lightweight deep learning-based data recovery system using a Generative Adversarial Network (GAN) principle named License Plate Recovery GAN (LPRGAN). The design has a proposed encoder-decoder style inspired by an autoencoder aided by dual classification networks. This style is suitable for problem-characteristic learning because strong contextual information retrieves from the down-scaled representations. This proposed system has three main features, identifying a problem, data recovery, and a fail-safe mechanism. The data recovery unit (LPRGAN) is used to recover license plate images from multiple degraded input images. Most existing image restoration systems do not have self-awareness, leading to an inefficiency problem. Unlike existing works, this system has anomaly detection and will only process on a degraded input, reducing workload overhead and improving efficiency as well as a fail-safe feature to prevent an unexpected bad output. Hence, it is a light and efficient system so it could be possible to deploy on a low-power machine such as edge computing devices, opening up new possibilities in on-device computing. Our proposed research can recover several degraded problems up to 720p resolution at 15 frames per second on a single graphic card, 256x128 resolution at 17 frames per second on a CPU-only workstation machine, or 7 frames per second on an ultra-low-power tablet PC.

Efeito da termociclagem na microdureza interna de resinas compostas bulk fill de alta e baixa viscosidade aplicadas em cavidades classe I

ABSTRACT Objective: To evaluate the effect of thermocycling on the Knoop internal microhardness of high- and low viscosity bulk fill resins applied in Class I cavities. Methods: Thirty third molars with Class I cavity preparations were randomly divided into 3 groups according to the restorative system: nanoparticulated composite resin (Filtek™ Z350 XT 3M ESPE) (oblique increments of 2mm); low viscosity bulk fill resin (Filtek™ Bulk fill Flow, 3M ESPE) (3mm increments covered with a 1-mm layer of nanoparticulated resin); high viscosity bulk fill resin (Filtek™ Bulk fill, 3M ESPE) (single 4-mm increment). After 24h, half of samples was submitted to thermocycling (1,000 cycles). All samples (n=5) were sectioned in half to measure the internal microhardness at bottom and top of restoration. Results: Analysis of variance indicated that, for nanoparticulated composite resin, without thermocycling, the microhardness at the top was statistically lower than at the bottom. After thermocycling, there was no difference in microhardness between the top and the bottom. For low viscosity bulk fill resin, without thermocycling, there was no significant difference in microhardness means between the top and the bottom. After thermocycling, significantly higher microhardness was found at the top than at the bottom (p <0.05). For high viscosity bulk fill resin there was no significant difference between the microhardness values at the top and bottom, regardless of thermocycling (p> 0.05). In all composite resins, an increase in microhardness was observed after thermocycling (p <0.05). Conclusion: Thermocycling increased the internal microhardness of resin restorations, and, for the low viscosity bulk fill resin, the microhardness at the top was higher than at the bottom after thermocycling.

Biomechanics of anterior endocrowns with different designs and depths: Study of finite elements.

To date, there is no clear consensus in the literature on which endocrown design and depth is the most effective treatment option for restoring endodontically treated maxillary central incisors. Aim: To determine the stress distribution of the anterior endocrowns by means of finite element analysis. Nine 3D finite element models (groups A - I) were made, each one representing a restoration system of endodontically treated upper central incisors. The models were endocrowns with and without ferrules at 0, 1, 3, and 5 mm depth and a post-core stump control group. A static load of 100N of force was applied to the palatal face at 45º from the long axis of the tooth. The Von Mise values and the maximum stress in the crown, dentin and resin cementum were evaluated separately. The maximum stress distribution was C < B < A < D < H < F < E < G < I and the Von Mises stresses were in the upper 1/3 of the retainer of endocrowns A, B, C and D. ; in the vestibular neck in endocrowns E and F; in the final 1/3 of the retainer in the endocrown G; in the middle 1/3 of the retainer in the H endocrown; and at the level of the vestibular neck of the crown in model I. The smallest distribution of maximum and Von Mises stresses was observed in model C. Key words:Finite element analysis, Biomechanics, upper central incisor, endodontically treated teeth, dental restoration.

Esthetic and clinical outcomes after immediate placement and restoration: Comparison of two implant systems in the anterior maxilla-A cross-sectional study.

To assess the esthetic and clinical performance of a novel self-tapping implant system for single-tooth restorations in the esthetic zone after immediate placement and provisionalization. This cross-sectional study included 52 patients contributing a total of 52 immediately placed and restored implants with ≥12 months after functional loading, comparing two different implant systems: Straumann® BLX (Institut Straumann AG, Basel, Switzerland; 25 patients) and Ankylos® (Dentsply Sirona, Hanau, Germany; 27 patients). As the primary outcome measure, peri-implant tissue esthetics were assessed by means of pink esthetics score (PES) rated by three independent clinicians. Moreover, as secondary outcome measures, the peri-implant tissue health was assessed by means of bleeding on probing, probing depth, and suppuration. Apart from that, the modified plaque index, keratinized mucosa width, and the presence of mucosal recessions were also assessed. When clinical signs suggested the possibility of peri-implantitis, radiographs were indicated to assess progressive bone loss. The mean PES ratings were 12.10± 1.10 for Ankylos versus 11.2± 1.86 for BLX, both achieving good esthetic results without significant differences (p= 0.143). There were no differences among most clinical parameters (plaque, bleeding on probing, probing depth, peri-implant mucosal recession), although peri-implant mucositis was present in one-third of the cases. The inter-rater agreement on esthetics was not significant (p < 0.250). Within the limitations of the present study, it was concluded that the use of either BLX or Ankylos implant systems was associated to comparable peri-implant health and good pink esthetic outcomes during immediate implantation and restoration protocols, for at least 12 months.

Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts

Spatial variability in carbon dioxide (CO2) and oxygen (O2) was assessed within an Indigenous Hawaiian fishpond undergoing active ecosystem restoration. The brackish, tidal fishpond is located within Kāne‘ohe Bay, Hawai‘i. Following a year of monthly discrete sampling, a significant shift in DIC and percent O2 saturation was observed along the North-South axis within the pond. The south end of the pond was higher in DIC (+35 μmol·kg⁻¹) and lower in percent O2 saturation (-19%) than the north end, which exhibited values similar to those observed in water entering the fishpond from the bay. Water quality parameters and inequal proximity to water flux sites suggested that a difference in residence time may exist along the north-south axis. In addition, ΔTA/ΔDIC relationships revealed a respiration signal in south end of the pond, which was enhanced at depth. While physical processes strongly affect CO2 and O2 across various temporal scales, spatial patterns in biological processes may also affect variability within the fishpond. These findings demonstrate that changes in water chemistry within the fishpond are the result of ecosystem restoration efforts. In turn, future management decisions at the fishpond will play an important role in preserving its viability as a healthy habitat for the intended marine species.