ISRN dentistry最新文献_第6页

Dimensional accuracy of stone casts obtained with multiple pours into the same mold. 在同一模具中多次浇注获得的石铸件尺寸精度。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-12-24 DOI: 10.5402/2012/730674

Valdimar da Silva Valente, Artêmio Luiz Zanetti, Pedro Paulo Feltrin, Ricardo Tatsuo Inoue, Carmem Dolores Vilarinho Soares de Moura, Luiz Evaldo de Moura Pádua

{"title":"Dimensional accuracy of stone casts obtained with multiple pours into the same mold.","authors":"Valdimar da Silva Valente, Artêmio Luiz Zanetti, Pedro Paulo Feltrin, Ricardo Tatsuo Inoue, Carmem Dolores Vilarinho Soares de Moura, Luiz Evaldo de Moura Pádua","doi":"10.5402/2012/730674","DOIUrl":"https://doi.org/10.5402/2012/730674","url":null,"abstract":"Aim. The aim of the present study was to compare the dimensional accuracy of stone casts obtained with vinyl polysiloxane molds through the double-impression technique with three pours into the same mold. Methods. A stainless steel master model was constructed simulating a three-unit fixed prosthesis. Twelve impressions were taken of this master model with addition silicone, using the double-impression technique. Three pours of type IV gypsum were then made into each mold, thus producing 36 casts. The pours were made 1 hour, 6 hours and 24 hours after the impression procedure. Next, intra- and interabutment measurements were made in a coordinate measuring machine. Results. Comparative analysis of the dimensional accuracy of stone casts resulting from multiple pours was not statistically significant in pours first and second (P > 0.05). These values, however, were statistically significant at third pour in the height in abutment 1 and upper distance interabutment. Conclusion. The wait time (1 hour, and 6 hours) observed before pouring the stone into the same molds did not cause significant dimensional accuracy of the casts.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"730674"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3540701/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31162767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

An Investigation about the Influence of Bleaching on Shear Bond Strength of Orthodontic Brackets and on Enamel Colour. 漂白对正畸托槽剪切结合强度及牙釉质颜色影响的研究。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-03-22 DOI: 10.5402/2012/375849

Isabell Immerz, Peter Proff, Piero Roemer, Claudia Reicheneder, Andreas Faltermeier

{"title":"An Investigation about the Influence of Bleaching on Shear Bond Strength of Orthodontic Brackets and on Enamel Colour.","authors":"Isabell Immerz, Peter Proff, Piero Roemer, Claudia Reicheneder, Andreas Faltermeier","doi":"10.5402/2012/375849","DOIUrl":"https://doi.org/10.5402/2012/375849","url":null,"abstract":"The aim of the study was to investigate the effect of bleaching on the colouration of tooth enamel and shear bond strength of orthodontic ceramic brackets based upon current whitening practice. The bleaching and bonding techniques were performed on extracted bovine teeth for the investigation of their colorimetric spectrum and the adhesive bond strength on surface enamel. One group was designated as the control group with no pre-treatment. Another group was treated with a 45% hydrogen peroxide solution prior to bonding. The difference in colour was expressed as the Euclidian distance ΔE. The resulting shear bond strength was analyzed and evaluated by scores of Adhesion Remnant Index. Statistical analysis was performed using the Kruskall-Wallis and post-hoc test. The colorimetric analysis revealed statistically significant differences between original and bleached as well as bleached and debonded teeth setting off a blue colour shift. Furthermore, statistically there was no significant difference noted in bonding strength between non-treated surfaces and those treated with peroxide. It can be concluded that peroxide pre-treatment does result in colour differences of teeth. Bonding and debonding procedures seem to have no statistically significant influence on the enamel colour using current materials.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":" ","pages":"375849"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3318886/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40186036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

The prevalence of dental anomalies in the Western region of saudi arabia. 沙特阿拉伯西部地区牙齿异常的患病率。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-06-19 DOI: 10.5402/2012/837270

Ahmed R Afify, Khalid H Zawawi

{"title":"The prevalence of dental anomalies in the Western region of saudi arabia.","authors":"Ahmed R Afify, Khalid H Zawawi","doi":"10.5402/2012/837270","DOIUrl":"https://doi.org/10.5402/2012/837270","url":null,"abstract":"Objective. The aim of this cross-sectional study was to investigate the prevalence of dental anomalies that could be a cause of malocclusion in the western region of Saudi Arabia. Materials and Methods. A retrospective study of 878 digital orthopantomograms (OPGs) taken of patients, age ranging between 12 and 30 years, who presented to treatment at the Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia between 2002 and 2011. The OPGs and dental records were reviewed for congenitally missing teeth, supernumerary teeth, impactions, ectopic eruption, transposition, germination, fusion, dilacerations, taurodontism, dens in dent, and any other unusual conditions that can be assessed with OPG. Results. The prevalence of patient that exhibited at least one dental anomaly was 396 (45.1%) patients. The prevalence of congenitally missing teeth was 226 (25.7%), impacted teeth 186 (21.1%), dilacerated teeth 10 (1.1%), supernumerary teeth 3 (0.3%), odontoma 1 (0.1%), and taurodontism was also 1 case (0.1%) of the total radiographs reviewed. Conclusions. Congenitally missing teeth were found to be the most prevalent anomaly (25.7%), and the second frequent anomaly was impacted teeth (21.1%), whereas root dilacerations, supernumerary teeth, and taurodontism were the least frequent anomalies (1.1%, 0.3% and 0.1%, resp.).","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"837270"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/837270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30750049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 128

Comparison of the anterior limit of the dentition in patients treated with self-ligating straight-wire, conventional straight-wire and standard edgewise appliances. 自结扎直丝、常规直丝和标准边缘矫治器治疗患者牙列前边界的比较。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-07-01 DOI: 10.5402/2012/748758

Luca Lombardo, Paolo Ficara, Ivano Maltoni, Lorenz Moser, Maria Paola Guarneri, Giuseppe Siciliani

{"title":"Comparison of the anterior limit of the dentition in patients treated with self-ligating straight-wire, conventional straight-wire and standard edgewise appliances.","authors":"Luca Lombardo, Paolo Ficara, Ivano Maltoni, Lorenz Moser, Maria Paola Guarneri, Giuseppe Siciliani","doi":"10.5402/2012/748758","DOIUrl":"https://doi.org/10.5402/2012/748758","url":null,"abstract":"THE AIM OF THIS STUDY WAS TO IDENTIFY AND COMPARE ANY DIFFERENCES IN THE POSITION OF THE ANTERIOR LIMIT OF THE DENTITION PROVOKED BY THREE DIFFERENT TYPES OF ORTHODONTIC MECHANICS: traditional edgewise, straightwire and self-ligating. A sample of 54 patients (selected from a group of 289 patients) possessed a range of Little's Irregularity Index values for the upper and lower dental arches between a minimum of 6.5 and a maximum of 13.5 at T0, and corresponding final values no greater than 2 and hence of minimal irregularity. The 54 patients were subdivided into three groups according to the type of brackets used in their treatment: Group 1 was composed of 24 patients treated using the self-ligating technique, Group 2 of 15 patients treated using a conventional straight-wire technique (Roth) and Group 3 of 15 patients treated using the standard edgewise technique. Cephalometric tracings were performed on laterolateral teleradiography. Group 1 value was found to be nonsignificant, whereas significant labial inclination was noted in Groups 2 and 3 (P < 0.05). A significant labial inclination of the upper incisors was also evidenced in all three sample groups.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"748758"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/748758","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30774039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Do the indonesians receive the dental care treatment they need? A secondary analysis on self-perceived dental care need. 印尼人得到他们需要的牙齿护理治疗了吗?自我感知牙齿护理需求的二次分析。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-07-19 DOI: 10.5402/2012/769809

Diah Ayu Maharani

引用次数: 11

The Antibacterial Efficacy of Biopure MTAD in Root Canal Contaminated with Enterococcus faecalis. 生物纯MTAD对粪肠球菌污染根管的抗菌效果。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-08-01 DOI: 10.5402/2012/390526

Blerim Kamberi, Donika Bajrami, Miranda Stavileci, Shuhreta Omeragiq, Fatmir Dragidella, Ferit Koçani

{"title":"The Antibacterial Efficacy of Biopure MTAD in Root Canal Contaminated with Enterococcus faecalis.","authors":"Blerim Kamberi, Donika Bajrami, Miranda Stavileci, Shuhreta Omeragiq, Fatmir Dragidella, Ferit Koçani","doi":"10.5402/2012/390526","DOIUrl":"https://doi.org/10.5402/2012/390526","url":null,"abstract":"Aim. The purpose of this in vitro study was to assess the antimicrobial efficacy of Biopure MTAD against E. faecalis in contaminated root canals. Materials and Methods. Forty-two single rooted extracted human teeth were inoculated with E. faecalis and incubated for four weeks. The samples were divided in two control and five experimental groups irrigated with 1.5% sodium hypochlorite solution (NaOCl); 3% NaOCl; BioPure MTAD; 1.5% NaOCl/17% EDTA; or 3% NaOCl/17% EDTA. After a one-week incubation, complete disinfection was confirmed by the absence of turbidity in the incubation media. Dentin shavings were taken from samples with no turbidity to verify whether E. faecalis was present in dentin tubules. Results were analyzed statistically using Fisher's exact test, with the level of significance set at P < 0.05. Results. Statistical analysis of the data obtained at Day 7 and after dentin shaving analysis showed that BioPure MTAD had significantly greater antibacterial activity than 1.5% NaOCl, 1.5% NaOCl/17% EDTA and 3% NaOCl/17% EDTA. No significant difference was detected between MTAD and 3% NaOCl. Conclusions. These findings suggest that BioPure MTAD possesses superior bactericidal activity compared with NaOCl and EDTA against E. faecalis.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"390526"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/390526","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30916350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Evaluation of the periodontal status in acromegalic patients: a comparative study. 肢端肥大症患者牙周状况的评价:一项比较研究。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-12-06 DOI: 10.5402/2012/950486

Ali N Harb, Birte Holtfreter, Nele Friedrich, Henri Wallaschofski, Matthias Nauck, Thomas Kocher

{"title":"Evaluation of the periodontal status in acromegalic patients: a comparative study.","authors":"Ali N Harb, Birte Holtfreter, Nele Friedrich, Henri Wallaschofski, Matthias Nauck, Thomas Kocher","doi":"10.5402/2012/950486","DOIUrl":"10.5402/2012/950486","url":null,"abstract":"Aim. The aim was to compare the periodontal status of the acromegalic patients with healthy subjects from a large population-based cohort (Study of Health in Pomerania, SHIP). Materials and Methods. We studied 32 acromegalic patients (16 females) and 128 randomly selected SHIP subjects (controls) using a 1 : 4 matching. Serum IGF-I and IGFBP-3 levels were measured using the Immulite 2500 system. Periodontitis was assessed by clinical attachment loss (CAL), probing depth (PD), and number of missing teeth. Linear and logistic regression models were used to assess differences in periodontal variables between acromegalic patients and controls. Results. IGF-I levels were comparable in acromegalic patients and controls, whereas IGFBP-3 levels were significantly higher in acromegalic patients (P = 0.004). In multivariate modelling, both groups did not differ significantly with respect to mean CAL (P = 0.12) and high tooth loss (P = 0.36). Mean PD was higher in acromegalic patients by trend (B = 0.28 (-0.00; 0.56)). Conclusion. In acromegalic patients, periodontal disease severity did not differ from their healthy SHIP controls.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"950486"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3529431/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31151909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dental Caries, and Supragingival Plaque and Calculus among Students, Tanga, Tanzania. 坦噶，坦尚尼亚，学生龋齿、龈上菌斑及牙石。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-03-12 DOI: 10.5402/2012/245296

L C Carneiro, M N Kabulwa

引用次数: 20

Periodontal Status amongst Substance Abusers in Indian Population. 印度人口中药物滥用者的牙周状况。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-04-17 DOI: 10.5402/2012/460856

Shantipriya Reddy, Sanjay Kaul, Chaitali Agrawal, M G S Prasad, Jaya Agnihotri, Nirjhar Bhowmik, D Amudha, Soumya Kambali

{"title":"Periodontal Status amongst Substance Abusers in Indian Population.","authors":"Shantipriya Reddy, Sanjay Kaul, Chaitali Agrawal, M G S Prasad, Jaya Agnihotri, Nirjhar Bhowmik, D Amudha, Soumya Kambali","doi":"10.5402/2012/460856","DOIUrl":"https://doi.org/10.5402/2012/460856","url":null,"abstract":"Background. In India there have been limited number of studies on periodontal status among drug addicts, and thus this study aims to assess the Oral hygiene and periodontal status in substance abusers and compare it with non-substance abusers. Methods. A comparative study was conducted to assess the periodontal status in substance abusers. Non-substance abusers were procured from the general population of Bangalore. From the control group 250 non-substance abusers were age and sex matched with the study population of substance abusers. The oral hygiene and periodontal condition of all subjects was assessed using Oral hygiene index- simplified (OHI-S), Russell's periodontal indices and Gingival bleeding index. Results. The mean of OHI-S and Periodontal Index (Russell's Index) scores were higher (2.70 and 3.68, resp.) in substance abusers than the control group (2.45 and 2.59, resp.). The mean Gingival bleeding score was lower (9.69) in substance abusers than the control group (22.7) and found to be statistically significant. A positive correlation found between OHI-S and Russell's periodontal index whereas negative correlation was found between OHI-S and Gingival bleeding in substance abusers. Conclusions. Though the oral hygiene was fair, more periodontal destruction and less of gingival bleeding were observed in substance abusers as compared to control group.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"460856"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/460856","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30605339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Changes in the upper and lower pharyngeal airway spaces associated with rapid maxillary expansion. 上颌快速扩张引起的上、下咽气道间隙改变。

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-06-18 DOI: 10.5402/2012/290964

Fitin Aloufi, Charles B Preston, Khalid H Zawawi

{"title":"Changes in the upper and lower pharyngeal airway spaces associated with rapid maxillary expansion.","authors":"Fitin Aloufi, Charles B Preston, Khalid H Zawawi","doi":"10.5402/2012/290964","DOIUrl":"https://doi.org/10.5402/2012/290964","url":null,"abstract":"Objectives. The primary objectives of this retrospective study were first to compare the upper and lower pharyngeal airway spaces between orthodontic patients with and without maxillary constriction and second to evaluate the effect of rapid maxillary expansion (RME) on these airway spaces. A secondary objective was to compare the mode of breathing between groups. Materials and Methods. The experimental (RME) group consisted of 30 patients (mean age, 14.2 ± 1.3 years, 16 boys and 14 girls) with maxillary constriction who were treated with hyrax-type RME. The control group comprised the records of age- and gender matched patients (mean age, 13.8 ± 1.5 years, 16 boys and 14 girls) with no maxillary constriction but requiring nonextraction comprehensive orthodontic treatment. Cephalometric measurements in the sagittal dimension of upper and lower airway spaces for the initial and final records were recorded. Mode of breathing and length of treatment were also compared. Results. The sagittal dimension of the upper airway increased significantly in the RME group (mean = 1.3 mm) compared to the control group (mean = 0.5 mm), P = 0.016. However, there was no significant difference in the lower pharyngeal airway measurement between the RME group (mean = 0.2) and the control group (mean = 0.4), P = 0.30. There was no significant difference with respect to mode of breathing between the two groups (P = 0.79). Conclusion. Rapid maxillary expansion (RME) during orthodontic treatment may have a positive effect on the upper pharyngeal airway, with no significant change on the lower pharyngeal airway.","PeriodicalId":89396,"journal":{"name":"ISRN dentistry","volume":"2012 ","pages":"290964"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/290964","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30750544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43