Advances in Dentistry & Oral Health最新文献_第9页

Corrosion Analysis of Orthodontic Wires: An Interaction Study of Wire Type, pH and Immersion Time 正畸金属丝腐蚀分析:金属丝类型、pH值和浸泡时间的相互作用研究

Advances in Dentistry & Oral Health Pub Date : 2018-12-05 DOI: 10.19080/adoh.2018.10.555780

Nita Viwattanatipa

{"title":"Corrosion Analysis of Orthodontic Wires: An Interaction Study of Wire Type, pH and Immersion Time","authors":"Nita Viwattanatipa","doi":"10.19080/adoh.2018.10.555780","DOIUrl":"https://doi.org/10.19080/adoh.2018.10.555780","url":null,"abstract":"Variety of metal alloy wires are used in modern orthodontic treatment, such as, Stainless Steel (SS), cobalt-chromium, NickelTitanium (NiTi), Beta-Titanium (TMA), etc. These metal alloy wires are subjected to biodegradation in oral environments leading to corrosion. Although the risk is low, corrosion products such as nickel and chromium may cause sensitivities or allergic reactions during orthodontic treatment [1-5]. Other consequences may involve discoloration or roughening of surface leading to friction between the bracket and the arch wire [1,2]. Several intrinsic and environmental factors influence the corrosion reactions of orthodontic wires such as, types of alloys, surface roughness, surface coating, electrolyte, pH value, aging, immersion time and temperature [1,3,4,6-12]. Orthodontic appliances rely on the formation of a passive surface oxide film to resist corrosion. The addition of nickel and chromium in stainless steel alloy imparts corrosion resistance. The chromium in the stainless-steel forms a protective, passivating oxide layer (Cr2O3) that provides a barrier to oxygen diffusion and other corrosive environments [2]. The Australian wires are special type of high tensile stainless-steel wire, with rougher surface than other stainless steel [13,14]. The corrosion resistance of nickel-titanium wire is due to the large amount of titanium in its compositions with passivation surface film of several oxides (TiO, TiO2, Ti2O5) [2]. The beta-titanium alloy wire has excellent corrosion resistance and biocompatibility which is due to the presence of titanium oxide (TiO2) [2,15,16].","PeriodicalId":202100,"journal":{"name":"Advances in Dentistry & Oral Health","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129668834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Upper Lateral Incisor Replacement With Socket Preservation and An Implant After A Failed Resin-Retained Bridge (RRB): A Case Report and Literature Review 树脂保留牙槽桥(RRB)失败后用牙槽保留和种植体置换上侧切牙:1例报告和文献回顾

Advances in Dentistry & Oral Health Pub Date : 2018-12-05 DOI: 10.19080/adoh.2018.09.555781

R. Rafeek

引用次数: 0

Validation of the Metastatic Formula: A Method of Cervical Lymph Nodes Assessment in Oral Cancer Patients 转移公式的验证:口腔癌患者颈部淋巴结评估的一种方法

Advances in Dentistry & Oral Health Pub Date : 2018-11-29 DOI: 10.19080/adoh.2018.10.555777

Y. Eltohami

{"title":"Validation of the Metastatic Formula: A Method of Cervical Lymph Nodes Assessment in Oral Cancer Patients","authors":"Y. Eltohami","doi":"10.19080/adoh.2018.10.555777","DOIUrl":"https://doi.org/10.19080/adoh.2018.10.555777","url":null,"abstract":"Background: The Metastasis Score (MS) had been introduced in 2007 as a new method for cervical nodes assessment in oral and maxillofacial cancer patients. The metastasis score (MS) was taken from the CT scan interpretation in the preoperative assessment and was found to be reliable. Objectives: To validate and evaluate the accuracy of the metastasis score (MS); a new method for cervical lymph nodes ASSESSMENT for metastasis in oral and maxillofacial cancer patients, in comparison to histopathology results. Materials and Methods: The study was conducted in Khartoum Teaching Dental Hospital, the main oral and maxillofacial referral center, during the period 2011-2013. Clinical investigation, CT scan, the metastasis scores (MS); from the CT scan interpretation, was calculated preoperatively on 25 patients who undergone neck dissection for primary head and neck malignancy. Results: Seven cases had a score of (0-3) and 18 cases had a score of (6-10). Twelve (48.0%) cases were positive (+ve) for neck metastasis and 13 (53.0%) cases were negative (-ve) for neck metastasis in the histopathology results. The histopathology results for the cases with metastasis score (MS) (0-3) showed (-ve) results in all the cases with an accuracy of 100% as there was no (+ve) results. For metastasis score (MS) the group (6-10) the histopathology results were (-ve) in 6 cases with an accuracy of 33.3% and it was (+ve) in 12 cases with an accuracy of 66.7%. The Sensitivity (true +ve results) and specificity (true -ve results) of this study are 100% and 53% respectively. Conclusion: The metastasis score (MS) predicts cervical metastasis with an accuracy of 100% for the group (0-3) and with an accuracy of 66.7% for the group (6-10) as there was an incidence of false positive results; nevertheless, this group mostly present with clinically positive neck where prophylactic neck dissection is indicated. the Metastasis","PeriodicalId":202100,"journal":{"name":"Advances in Dentistry & Oral Health","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128406988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Oral Health Status and Attitudes of Saudi Adolescent Male Students in Albaha Province: A Cross-Sectional Study 沙特阿拉伯阿尔巴哈省青少年男生口腔健康状况及态度的横断面研究

Advances in Dentistry & Oral Health Pub Date : 2018-11-29 DOI: 10.19080/ADOH.2018.10.555779

A. Alzahrani

引用次数: 3

The Role of Human Papilloma Virus in the Development of Oral Squamous Cell Carcinoma in Pakistani Population 人乳头瘤病毒在巴基斯坦人群口腔鳞状细胞癌发展中的作用

Advances in Dentistry & Oral Health Pub Date : 2018-11-29 DOI: 10.19080/adoh.2018.10.555778

J. Azhar

引用次数: 2

Surgical Management of Drug-Induced Gingival Overgrowth (DIGO) Using A Periodontal Resective Flap Procedure: A Case Report 用牙周瓣手术治疗药物性牙龈过度生长1例

Advances in Dentistry & Oral Health Pub Date : 2018-11-15 DOI: 10.19080/adoh.2018.09.555775

Gillam Dg

{"title":"Surgical Management of Drug-Induced Gingival Overgrowth (DIGO) Using A Periodontal Resective Flap Procedure: A Case Report","authors":"Gillam Dg","doi":"10.19080/adoh.2018.09.555775","DOIUrl":"https://doi.org/10.19080/adoh.2018.09.555775","url":null,"abstract":"Gingival hyperplasia or Drug-induced Gingival Overgrowth (DIGO) may be caused by a variety of conditions or prescribed medications and/or therapies, for example, immuno-suppressive therapy (cyclosporin), anticonvulsants (phenytoin) and calcium channel blockers (nifedipine, amlodipine or diltiazem). According to Ellis [1] the prevalence of Gingival Overgrowth or DIGO is approximately 20% to 83% of the patients taking the medication. Of the medication prescribed 50% of DIGO is attributed to phenytoin, 30% to cyclosporin, and 10% to 20% to calcium channel blockers. Nifedipine appears to be the more prominent calcium channel blocker causing DIGO [2]. Hyperplasia of this nature is usually the result of a combination of the above-mentioned medications and a local irritant such as plaque biofilms. Plaque may be associated with dental calculus or a poorly adapted margin of a dental restoration, which may allow biofilm accumulation and maturation and therefore may impede its disruption and removal. If left untreated, this oral condition can affect the alignment of the teeth and increase the risk of developing gum disease. Gingival hyperplasia can be resolved by improving oral hygiene habits. In more severe cases, surgical treatment is necessary. It has been proposed that medication affects the normal inflammatory response with a resultant increase in gingival fibroblast proliferation and collagen production [3].","PeriodicalId":202100,"journal":{"name":"Advances in Dentistry & Oral Health","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128460312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compatibility of Different Composite Shades with VITA Shade Guide 不同复合阴影的兼容性与VITA阴影指南

Advances in Dentistry & Oral Health Pub Date : 2018-11-15 DOI: 10.19080/adoh.2018.10.555776

Ali A Razooki Al Shekhli

引用次数: 0

“ENDOCROWN”: A Reliable Alternative to Restorate RCT Molar! – Two Case Reports “ENDOCROWN”:修复RCT磨牙的可靠选择!-两宗个案报告

Advances in Dentistry & Oral Health Pub Date : 2018-09-24 DOI: 10.19080/ADOH.2018.09.555774

I. Debbabi, Ommega Internationals

引用次数: 7

The Bacterial Flora in A Healthy Oral Cavity 健康口腔中的细菌菌群

Advances in Dentistry & Oral Health Pub Date : 2018-09-12 DOI: 10.19080/ADOH.2018.09.555773

V. Ambarkova

引用次数: 2

Surgical Excision of An Epulis: Case Report 手术切除肱骨外眦肌1例

Advances in Dentistry & Oral Health Pub Date : 2018-09-12 DOI: 10.19080/ADOH.2018.09.555770

Gillam Dg

引用次数: 1