bluuebunny/crossref_metadata_2025_split huggingface dataset:
Root resorption after orthodontic treatment
Authors: Armstrong David , Kharbanda Om P. , Petocz Peter , Darendeliler M. Ali 
Published: December 2023

Abstract

Background
Orthodontic treatment can result in root resorption.

Objective
To determine if apical root resorption is related to the type of appliance used and/or the direction and amount of tooth movement.

Methods
The pre- and post-treatment tooth lengths of the maxillary and mandibular first molars and incisors were measured on panoramic radiographs of 114 subjects. Associations between changes in the lengths of the incisors and positional changes in the upper and lower central incisors were determined for 45 subjects with pre- and post-treatment cephalometric radiographs.

Results
Taking into account the gender and OPT machine seven statistically significant differences were found between the appliance groups for the lengths of teeth 31 and 41. Within the groups four teeth decreased significantly in length when the pre-adjusted appliance was used (teeth 12, 11, 21, 26) and four teeth when the Speed appliance was used (teeth 26, 31, 41, 42). Only tooth 31 was shorter when the Tip-Edge appliance was used. Lower incisors were significantly shorter post-treatment if the apices were moved close to the lingual cortex.

Conclusions
When panoramic radiographs are used to assess treatment-induced changes in the lengths of the incisors, apical resorption is only one factor that should be considered. The images of lower incisors proclined during treatment may be foreshortened and/or the apices may lie outside the focal plane: both may result in ‘shorter’ teeth post-treatment. Because of the confounding factors panoramic radiographs may not be a reliable method of determining apical root resorption.
Comparison of surgical and non-surgical methods of treating palatally impacted canines. II - Aesthetic outcomes
Authors: Ling Kwok K. , Ho Christopher T. C. , Kravchuk Olena , Olive Richard J. 
Published: December 2023

Abstract

Background
Palatally impacted maxillary canines may appear unsightly after treatment because of changes in position and colour.

Aim
To determine if palatally impacted canines treated either by surgical exposure and orthodontic repositioning or by creation of space in the arch and unassisted eruption have different aesthetic outcomes.

Methods
Twenty eight subjects with unilateral palatally impacted canines who had completed orthodontic treatment at least 6 months previously were recruited from three specialist practices. In 14 subjects the canines had been treated by surgical exposure, orthodontic extrusion and repositioning in the arch (SE group) and in the remainder the deciduous canines were extracted and excess space created in the arch for the canines to erupt naturally (OT group). The contralateral canines were used as controls. The mean pretreatment ages of the subjects in the SE and OT groups were 13.5 (SD: 1.6) years and 13.5 (SD: 1.3) years respectively. The position and colour of the canines were assessed on post-treatment study models and 35 mm slides using the American Board of Orthodontics Objective Grading System (ABO OGS) and subjective appraisal by two orthodontists. Each subject used a semantic scale to rate the aesthetic outcome of treatment.

Results
Sixty four per cent of the treated canines in the SE group were significantly more ‘intruded’ than the treated canines in the OT group (p = 0.004) and the control canines (p = 0.004). The ABO OGS grades of the canines in the SE and OT groups were similar (p = 0.173). While the assessors detected a lack of labial root torque and gingival margin changes in the canines in the SE group, the subjects in both groups were satisfied with the appearance of the canines post-treatment.

Conclusions
Palatally impacted canines treated by surgical exposure, extrusion and orthodontic treatment were more likely to be displaced vertically (‘intruded’) after treatment than palatally impacted canines treated by extraction of the overlying deciduous canines and creation of excess space in the arch. Small occlusal and aesthetic changes detected by the orthodontists, but not the ABO OGS, did not appear to detract from the satisfaction of the subjects with the results of orthodontic treatment.
The relationships between malocclusion, fixed orthodontic appliances and periodontal disease. A review of the literature
Authors: van Gastel Jan , Quirynen Marc , Teughels Wim , Carels Carine 
Published: December 2023

Abstract

Aims
To review the literature on the periodontal implications of malocclusion and fixed orthodontic appliances.

Methods
The PubMed database was searched for original articles on ‘orthodontics and gingivitis/periodontology/plaque/microbiology/histology’, ‘bracket and gingivitis/periodontology/plaque/microbiology/histology’, ‘crowding/spacing/overbite/overjet/open bite/crossbite traumatic occlusion and gingivitis/periodontology/plaque/microbiology/histology’. Only articles published between 1970 and 30 April 2007 were used. The search was augmented by screening the references cited in each paper for additional articles that might have been missed by the electronic search.

Results/Conclusions
Dental plaque is the primary cause of gingival inflammation and periodontitis. Conditions that encourage the growth and retention of dental plaque result in a localised gingivitis, which rarely progresses to periodontal disease. Only a few studies report attachment loss during orthodontic treatment. The contradictory findings on the impact of malocclusion and orthodontic appliances on periodontal health may be partly due to the selection of materials and differences in the research methods employed.
Comparison of hydroxyapatite and dental enamel for testing shear bond strengths
Authors: Imthiaz Nishat , Georgiou George , Moles David R. , Jones Steven P. 
Published: December 2023

Abstract

Aims
To investigate the feasibility of using artificial hydroxyapatite as a future biomimetic laboratory substitute for human enamel in orthodontic bond strength testing by comparing the shear bond strengths and nature of failure of brackets bonded to samples of hydroxyapatite and enamel.

Method
One hundred and fifty hydroxyapatite discs were prepared by compression at 20 tons and fired in a furnace at 1300°C. One hundred and five enamel samples were prepared from the buccal and palatal/lingual surfaces of healthy premolars extracted for orthodontic purposes. Orthodontic brackets were bonded to each sample and these were subjected to shear bond strength testing using a custom-made jig mounted in an Instron Universal Testing Machine. The force value at bond failure was obtained, together with the nature of failure which was assessed using the Adhesive Remnant Index.

Results
The mean shear bond strength for the enamel samples was 16.62 MPa (95 per cent CI: 15.26, 17.98) and for the hydroxyapatite samples 20.83 MPa (95 per cent CI: 19.68, 21.98). The difference between the two samples was statistically significant (p < 0.001). When the nature of failure was assessed with the ARI Index, 83 per cent of the enamel samples scored 2 or 3, while 49 per cent of the hydroxyapatite samples scored 0 or 1.

Conclusions
Hydroxyapatite was an effective biomimetic substrate for bond strength testing with a mean shear bond strength value (20.83 MPa) at the upper end of the normal range attributed to enamel (15–20 MPa). Although the difference between the shear bond strengths for hydroxyapatite and enamel was statistically significant, hydroxyapatite could be used as an alternative to enamel for comparative laboratory studies until a closer alternative is found. This would eliminate the need for extracted teeth to be collected. However, it should be used with caution for quantitative studies where true bond strengths are to be investigated.
The effect of topical fluoride agents on the physical and mechanical properties of NiTi and copper NiTi archwires. An in vivo study
Authors: Ramalingam Arthi , Kailasam Vignesh , Padmanabhan Sridevi , Chitharanjan Arun 
Published: December 2023

Abstract

Aim
The aim of this in vivo study was to determine the effect of topical fluoride agents on the mechanical properties of NiTi and copper NiTi archwires.

Methods
Thirty patients with fixed appliances were randomly divided into three groups: Group I (Control group) used no topical fluoride agents; Group II used a fluoride rinse; Group III applied a fluoride gel to the teeth. After 30 days, the archwires were retrieved and the moduli of elasticity and yield strengths measured. The groups were compared with the one-way ANOVA, and Tukey’s HSD test was used to identify the significant groups. One wire was randomly selected from each group and the surface examined with a scanning electron microscope.

Results
During unloading the modulus of elasticity of the NiTi archwire fell significantly in the gel group. The moduli of elasticity and yield strengths of the NiTi archwires during loading, and the copper NiTi archwires during loading and unloading, were not affected by either the gel or the rinse. Scanning electron microscopic analysis revealed that the copper NiTi archwires in the gel group had the most pitting.

Conclusions
Topical fluoride agents alter the mechanical properties of NiTi wires and, hence, may prolong orthodontic treatment.
The Effect of Revitalisation on the Value of Residential Premises in Historic Urban Layouts
Authors: Bieda Agnieszka , Maniak Weronika 
Published: December 2023

Abstract
The aim of this research was to analyze the effects of revitalization activities performed in a selected historical urban layout using the mixed method in which statistical analysis was supported by Geographic Information System (GIS) tools on the price level of residential premises on the secondary market. The subject of the analyses is “Old” Nowa Huta (Krakow, Poland), which was designed as an ideal independent city in the mid-20th century. The analysis covered the period from January 1, 2007 to December 31, 2020.
The conducted analyses have demonstrated that the transaction prices (and hence the value) of residential premises located in “Old” Nowa Huta increased during the performed revitalization activities. However, based on the results obtained, it could not be confirmed that this was the direct result of the revitalization itself, because the price level within the research site increased in proportion to the rising prices in the entire city. It seems, however, that although the changes in the quality of space in the analyzed area are not spectacular, they serve to improve the quality of life of the local community and are one of the ways to protect this historic urban layout.
Dampak COVID-19 Terhadap Hasil Analisis Kelayakan Investasi pada Saham Perusahaan BUMN
Authors: Susila Muktar Redy 
Published: December 2023

The aim of the research is to analyze the impact of COVID-19 on the stock performance of State-Owned Enterprises (BUMN). The research sample is the shares of BUMN companies. The sampling technique used in this research is purposive sampling. The number of samples that met the research criteria were 19 state-owned companies. The method used to analyze the CAPM. The results of the analysis prior to COVID-19 found that five state-owned companies were efficient shares. The results of the analysis at the time of COVID-19 obtained that fifteen BUMN companies were efficient shares. The results of the different tests on the performance of BUMN shares before and during COVID-19 concluded that there were differences. The results of the study show that with COVID-19 the feasibility of state-owned company shares has changed.Keywords : Stocks; COVID-19; CAPM; State-Owned Companies
Tingkat Kecukupan Cadangan Kerugian Kredit Ekspektasian di Era Pandemi Pada Bank Pembangunan Daerah Bali
Authors: Santana Dewa Ketut Wira , Budiasih I Gusti Ayu Nyoman 
Published: December 2023

The research aims to analyze the formation of Expected Credit Loss Reserves (CKKE) at the Bali Regional Development Bank (BPD) during the COVID-19 pandemic in accordance with POJK 17 of 2021 concerning the Second Amendment to Financial Services Authority Regulation Number 11/Pojk.03/2020 concerning National Economic Stimulus As a Countercyclical Policy on the Impact of the Spread of Coronavirus Disease 2019. The research uses a qualitative method approach with research subjects in all credit sectors owned by Bank BPD Bali. The methods used in collecting data in research are interviews and documentation studies. The data analysis technique used by the research uses triangulation, namely data reduction, data presentation, and drawing conclusions. The results of the study show that the level of adequacy of the establishment of BPD Bali's Expectation Credit Loss Reserves (CKKE) is in sufficient condition to be able to cover credit restructuring due to the impact of the COVID-19 pandemic, which can be seen from the average coverage ratio which has been 100%.
Keywords: Banking, Credit Expectations, Economic Impactsiko debitur.
Reaksi Pasar atas Pengumuman Larangan Ekspor Crude Palm Oil dan Produk Turunannya
Authors: Cahyani Dwi Ega , Putra I Nyoman Wijana Asmara 
Published: December 2023

This research aims to determine the reaction of capital market investors to the announcement of a ban on the export of Crude Palm Oil (CPO) and its derivative products. This research uses an event study approach for 7 days of observation in 2022. Market reactions in this research are measured using Cumulative Abnormal Return (CAR). The population of this research is oil palm plantation companies listed on the Indonesia Stock Exchange in 2022. The sampling method uses a purposive sampling technique. The number of samples obtained was 20 companies. This research uses one sample t-test data analysis techniques. The results of data analysis show that investors in palm oil plantation companies reacted negatively to the announcement of a ban on exports of CPO and its derivative products. This proves that investors pay attention to external events that can influence company performance.
Keywords: Market Reaction; Event Study; Abnormal Return; CPO Export Ban
Leverage, Firm Size, Likuiditas, Financial Distress, dan Aktivitas Hedging Dengan Instrumen Derivatif
Authors: Condronegoro Azhar , Hasibuan Henny Triyana 
Published: December 2023

This research aims to determine the effect of leverage, firm size, liquidity and financial distress on hedging activities in textile and garment subsector companies listed on the Indonesia Stock Exchange due to unstable exchange rate changes. The sample method used is purposive sampling with 65 observations collected during the 2017-2021 period. The secondary data used is obtained from the company's financial reports available on the website of the Indonesia Stock Exchange (IDX) and other sources. Data analysis was performed using logistic regression method. The findings of this research show that leverage does not have a significant influence on hedging activities, while firm size and financial distress have a positive influence on hedging activities, and liquidity has a negative influence on hedging activities.
Keywords: Leverage; Firm Size; Liquidity; Financial Distress; Hedging Activities
PERANCANGAN RUANG EDUKASI DAN INTERAKSI MAHASISWA SEBAGAI RUANG KETIGA DI JAKARTA BARAT
Authors: Varani Gabriella Baptista , Suteja Mekar Sari 
Published: December 2023

The learning process is one of the important activities in a student’s daily life. The higher level of education would get more academic demands that will lead to the regular learning processes and concentration needed. The needs for good quality of learning process is also experienced by college students. Based on the level of the study period time, college students are divided into first, middle, and final levels. Each level has a different way of learning. Sometimes stress or pressure arises due to academic demands and the difficulties experienced by college students in their learning process. A comfortable ambiance in the study room is needed to support the learning process and reduce student’s stress. Based on this phenomenon, college students are starting to look for other places outside their campus and homes that can accommodate their learning needs and reduce stress. Public buildings and facilities are chosen by them as a place for their learning activities. The use of public spaces has begun to function as study spaces because college students consider these places more comfortable and flexible for studying individually or in groups. The higher the need, a public facility that is built for college student learning activity is needed. Not just as a space, but specifically designed to be able to support various ways of learning and be able to reduce the student’s stress.
Keywords: flexible; learning; public; space; student
Abstrak
Kegiatan belajar tidak lepas dari kehidupan sehari-hari pelajar, terutama mahasiswa. Semakin tinggi tingkat pendidikan maka tuntutan akademik semakin besar sehingga proses belajar yang rutin dan konsentrasi yang cukup diperlukan. Keperluan akan tingginya kebutuhan belajar turut dialami oleh mahasiswa perguruan tinggi. Berdasarkan tingkatannya masa studinya, mahasiswa terbagi menjadi tingkat pertama, menengah, dan akhir. Masing-masing tingkatan memiliki cara belajar yang berbeda. Tidak jarang timbul stres atau tekanan yang dialami akibat tuntutan akademik dan kesulitan yang dialami oleh mahasiswa dalam proses belajar. Kenyamanan dalam ruang belajar diperlukan untuk menunjang proses belajar dan meminimalisir stres mahasiswa. Berdasarkan fenomena tersebut, mahasiswa kini mulai mencari tempat lain di luar kampus dan rumah yang dapat mengakomodir kebutuhan belajar dan mengurangi stres yang terjadi dalam prosesnya. Bangunan dan fasilitas publik dipilih oleh mahasiswa untuk melangsukan kegiatan belajarnya. Akibatnya penggunaan ruang publik mulai banyak yang terfungsikan sebagai ruang belajar karena mahasiswa menganggap tempat tersebut lebih nyaman, leluasa dan fleksibel untuk belajar secara individu maupun berkelompok. Semakin tingginya kebutuhan tersebut, maka diperlukan suatu fasilitas publik yang dibangun untuk kegiatan belajar mahasiswa. Tidak sekedar ruang saja, tetapi yang terdesain secara khusus untuk dapat menunjang berbagai cara belajar dan mampu mengurangi stres yang dialami oleh mahasiswa.
RELOKASI KAMPUNG NELAYAN CILINCING
Authors: Wihardani Dominikus Gusti , Carina Nina 
Published: December 2023

The Cilincing Fishermen Village, located in North Jakarta, Indonesia, has a history dating back to the 1920s as a fishing village. The majority of its residents work as fishermen, relying on the sea's resources as their livelihood. The village follows a linear two-sided settlement pattern, stretching along the road. Currently, the fishermen of Cilincing face environmental and economic challenges, such as frequent flooding and pollution from industries, impacting their livelihoods. This study also involves an analysis of social and cultural dynamics, categorizing main livelihoods, supporting livelihoods, family roles, social values, and fishing community skills before and after the relocation of the village to the sea. This will help understand the values, norms, and social practices crucial to the fishing community. The study aims to design a floating settlement that meets the physical, social, and economic needs of the fishermen, taking into account the geographical and environmental conditions. The goal is to create a sustainable relocation of the fishing community, considering architectural, economic, social, and environmental aspects that suit the fishermen's and marine environment's conditions.
Keywords: fishing village; floating; community; fishermen; marine environment
Abstrak
Kampung Nelayan Cilincing, yang terletak di Jakarta Utara, Indonesia, memiliki sejarah sebagai kampung nelayan sejak tahun 1920-an, sebagian besar penduduknya bekerja sebagai nelayan yang mengandalkan hasil laut sebagai penopang kehidupan mereka, dengan pola pemukiman sejajar (linier dua sisi) merupakan permukiman yang memanjang di sepanjang jalan. Saat ini nelayan Cilincing menghadapi tantangan lingkungan dan ekonomi, seperti banjir yang sering terjadi, dan pencemaran dari industri, yang mempengaruhi penghidupan nelayan. Studi ini juga harus melibatkan analisis tentang dinamika sosial dan budaya dengan kategori yang dibagi dalam mata pencaharian utama, mata pencaharian pendukung, peran keluarga, nilai sosial, dan keterampilan komunitas nelayan sebelum dan setelah pemindahan kampung ke laut. Hal ini akan membantu memahami nilai-nilai, norma, dan praktik sosial yang penting bagi komunitas nelayan. Studi ini bertujuan untuk merancang pemukiman terapung yang memenuhi kebutuhan fisik, sosial, dan ekonomi nelayan dengan mempertimbangkan kondisi geografis dan lingkungan sekitarnya. Agar dapat Merancang relokasi permukiman nelayan yang berkelanjutan, dengan memperhatikan aspek-aspek arsitektural, ekonomi, sosial, dan lingkungan yang sesuai dengan kondisi masyarakat nelayan dan lingkungan laut.
Web laboratory for supercomputer multiscale modeling of spraying problems
Authors: Тарасов Н.И. , Подрыга В.О. , Поляков С.В. 
Published: December 2023

Работа посвящена анализу принципов построения веб-лабораторий, предназначенных для суперкомпьютерного математического моделирования сложных физических процессов и явлений. Основными целями подобных цифровых платформ являются: автоматизация вычислительных экспериментов, формирование базы знаний и обеспечение совместной работы исследователей в выбранной предметной области. В работе рассмотрены существующие сегодня решения и принципы построения предметно-ориентированных платформ. На основе выполненного анализа была разработана и практически реализована веб-лаборатория, связанная с решением задач напыления. В работе приведены архитектура и детали программной реализации платформы. Основными ее преимуществами являются возможность динамического встраивания проблемно-ориентированных приложений и удаленных вычислительных ресурсов. Реализованная веб-лаборатория была протестирована посредством проведения серии вычислительных экспериментов по модельным задачам сверхзвукового холодного газодинамического напыления. Также в работе предлагаются направления для последующего развития оригинальной веб-лаборатории.
The work is devoted to the analysis of the principles of constructing the web laboratories intended for supercomputer mathematical modeling of complex physical processes and phenomena. The main goals of such digital platforms are the automation of computational experiments, formation of a knowledge base and ensuring collaboration of researchers in a subject area. The work discusses the solutions that exist today and the principles for constructing subject-oriented platforms. Based on the analysis performed, a web laboratory related to solving spraying problems was developed and implemented. The work provides the architecture and details of the software implementation of the platform. Its main advantages are the ability to dynamically integrate problem-oriented applications and remote computing resources. The implemented web laboratory was tested through a series of computational experiments on model problems of supersonic cold gas-dynamic spraying. The work suggests directions for the subsequent development of the original web laboratory.