Journal of Dental Rehabilitation and Applied Science最新文献_第7页

Effects of thickness and background on the masking ability of high-trasnlucent zirconias 厚度和背景对高透光氧化锆掩蔽能力的影响

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.199

Young-Gon Kim, Ji-Hye Jung, Hyun-Jun Kong, Yu-Lee Kim

{"title":"Effects of thickness and background on the masking ability of high-trasnlucent zirconias","authors":"Young-Gon Kim, Ji-Hye Jung, Hyun-Jun Kong, Yu-Lee Kim","doi":"10.14368/jdras.2021.37.4.199","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.199","url":null,"abstract":"Purpose: The purpose of this study was to compare and evaluate the masking ability of three types of high translucent zirconia according to the various thicknesses and backgrounds. Materials and Methods: Using three types of high-translucency zirconia (Ceramill zolid fx white, Ceramill zolid ht+ white, Ceramill zolid ht+ preshade A2), 10 cylindrical specimens were fabricated in 10mm diameter and each with four thicknesses (0.6 mm, 1.0 mm, 1.5 mm, 2.0 mm), respectively by CAD/CAM method. The background was 10 mm in diameter and 10 mm in thickness. A1, A2, A3 flowable resin backgrounds, blue-colored core resin background, and Ni-Cr alloy background were prepared, and black, white backgrounds provided by the spectrophotometer manufacturer (x-rite, Koblach, Austria) were used. zirconia specimens and the background specimen were stacked to measure L, a*, b* with Spectrophotometer (Color i5, x-rite, Koblach, Austria) and the ∆E value with the other background is calculated. The Calculated mean ∆E values were compared based on perceptibility threshold 1.0 and acceptability threshold 3.7. Nonparametric tests such as Kruskal-Wallis test were performed to verify statistical significance (α = 0.05). Results: There was a significant difference in the mean ∆E value according to the zirconia type, background and thickness change ( P = 0.000). Conclusion: According to the results of this study, the pre-colored high-translucent zirconia can obtain the desired zirconia shade when it is restored on teeth, composite resins, and abutments except for the blue resin core. (J Dent Rehabil","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82653791","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

Effect of applying adhesive after enamel etching on the shear bond strength of orthodontic brackets using light curing resin cements 牙釉质蚀刻后涂胶对光固化树脂胶泥正畸托槽剪切粘结强度的影响

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.209

Eung-Hyun Kim, Jin-Woo Kim, Se-Hee Park, Yoon Lee, Kyung-Mo Cho

引用次数: 0

Comparison of capsule type resin modified glass ionomer porosity according to mixing methods 不同混合方法下胶囊型树脂改性玻璃离聚体孔隙率的比较

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.217

Jung-min Kim, Jin-Woo Kim, Kyung-Mo Cho, Yoon Lee, Eung-Hyun Kim, Se-Hee Park

{"title":"Comparison of capsule type resin modified glass ionomer porosity according to mixing methods","authors":"Jung-min Kim, Jin-Woo Kim, Kyung-Mo Cho, Yoon Lee, Eung-Hyun Kim, Se-Hee Park","doi":"10.14368/jdras.2021.37.4.217","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.217","url":null,"abstract":"Purpose: The purpose of this study was to evaluate the porosity of resin modified glass ionomer (RMGI) by different mixing methods. Materials and Methods: Five specimens were prepared for each groups according to capsules and mixing methods. Two RMGI capsule and two mixing machines were used for this study. One resin-modified glass ionomer cement is Fuji II LC (F2LC) and the other is Photac Fil Quick Aplicap (PFQ). For Mixing of RMGI capsule, Rotomix using rotating motion and CM-II using shaking motion were used. After measuring height, radius and mass of specimens, Density was calculated. And porosity was measured using micro-computed tomography (micro-CT). All data were statistically analyzed using T-test, two-way ANOVA to compare between groups at 95% significance level to evaluate the affect of capsule and mixing method on the porosity. Results: The porosity was observed in all specimens generally. And there is significant differece between porosities according to RMGI capsule and Mixing method. The porosity of PFQ was lower than that of F2LC and the porosity of Rotomix was lower than that of CM-II. Conclusion: There was a difference of porosity according to kind of capsules and mixing methods. When using same capsule, less porosity was observed on PFQ than F2LC. When using same mixing mehod, less porosity was observed on Rotomix than CM-II. Using mixing machine of same coporation as that of RMGI capsule did not lead to lower porosity. Therefore, Selecting optimal mixing machine is important. (J Dent Rehabil Appl Sci 2021;37(4):217-24)","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79085616","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

Non-surgical root canal treatment of maxillary second premolar fused paramolar tubercle 上颌第二前磨牙融合旁磨牙结节的非手术根管治疗

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.268

Da-Kyung Choi, Hoon-Sang Chang, Y. Hwang, In-Nam Hwang, W. Oh, Chan Park, Bin-Na Lee

引用次数: 0

Characteristics of antimicrobial activity of Streptococcus salivarius K12 by culture condition 唾液链球菌K12的抑菌特性研究

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.244

Young-Gyun Song, Sung-Hoon Lee

{"title":"Characteristics of antimicrobial activity of Streptococcus salivarius K12 by culture condition","authors":"Young-Gyun Song, Sung-Hoon Lee","doi":"10.14368/jdras.2021.37.4.244","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.244","url":null,"abstract":"Purpose: The purpose of this study was to examine effects of culture conditions on the growth and antibacterial activity of Streptococcus salivarius K12. Materials and Methods: S. salivarius K12 was cultivated in medium containing animal and plant protein or in medium of neutral and acidic conditions. The growth of S. salivarius K12 was measured every 2 hours by a spectrophotometer. The antimicrobial activity of S. salivarius K12 against Streptococcus mutans and Porphyromonas gingivalis was investigated by the susceptibility assay using the spent culture medium. Results: the growth of S. salivarius K12 showed faster in medium containing plant protein and neutral pH condition. The antimicrobial and antifungal activity of S. salivarius K12 appeared stronger in medium containing plant protein than animal proteins. Conclusion: For application of S. salivarius K12 to bacterial oral disease, co-substances may be needed for S. salivarius K12 to colonize in the oral cavity and enhance the antimicrobial activity. (J Dent Rehabil Appl Sci 2021;37(4):244-50) incubated in the presence or absence of the SCM of S. salivarius K12. Bacterial growth was measured by a spectrophotometer. The experiments were carried out 4 times in duplicate, and data are expressed as mean ± standard deviation. * indicates statistically significant differences compared control group.","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74336619","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

Management of complicated crown fracture by tooth fragment reattachment with fiber post: a case report 纤维桩牙块再附着治疗复杂冠骨折1例

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.251

Yu-ri Kim, Kyoung-Hwa Jung, Sung-Ae Son, Jeong-Kil Park

引用次数: 0

A comparison study on shear bond strength of 3D printed resin and conventional heat-cured denture base resin to denture relining materials 3D打印树脂与传统热固化义齿基托树脂对义齿衬材剪切粘结强度的对比研究

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.232

Sung-Yoon Cho, Young-Gyun Song

{"title":"A comparison study on shear bond strength of 3D printed resin and conventional heat-cured denture base resin to denture relining materials","authors":"Sung-Yoon Cho, Young-Gyun Song","doi":"10.14368/jdras.2021.37.4.232","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.232","url":null,"abstract":"Purpose: The purpose of this study was to evaluate the shear bond strength of various 3D printed denture base resins and the conventional denture base resin to various denture relining materials. Materials and Methods: For denture base materials, a heat-cured (Vertex RS) and two types of 3D printed DENTCA Denture base II, NextDent TM Base) were used. And 4 types denture relining materials (Tokuyama Rebase II fast, Kooliner, Denture Liner, Denture Liner, Lang Jet Denture Repair Kit) with different components were used. It was classified into 12 groups. Adhesion was performed between the resin base and the relining materials in accordance with ISO/TS 11405 standard. The shear bonding strength was measured, and then the adhesion interface was observed with a stereoscopic microscope and a scanning electron microscope. The fracture pattern was investigated through the analysis of the fragment. Results: In the 3D printed denture resin group, the shear bonding strength with relining materials was significantly lower than that of the heat-cured resin group ( P < 0.05). The group of polymethyl methacrylate -based relining materials, high shear bonding strength was shown regardless of the type of denture. As for the fracture pattern, adhesive fracture appeared in most groups, and cohesive, mixed fracture appeared in some groups. Conclusion: The polymethyl methacrylate -based denture relining materials showed high shear bonding strength values compared to other denture relining materials. But, for direct methods, it is considered advantageous in terms of shear bonding strength to use a isobutyl methacrylate-based denture relining materials. (J Dent Rehabil Appl Sci 2021;37(4):232-43)","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78555222","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

Review on factors affecting the optical properties of dental zirconia 影响牙用氧化锆光学性能的因素综述

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.177

Chan-Ho Park, Kyung-Ho Ko, Chan-Jin Park, L. Cho, Yoon-Hyuk Huh

{"title":"Review on factors affecting the optical properties of dental zirconia","authors":"Chan-Ho Park, Kyung-Ho Ko, Chan-Jin Park, L. Cho, Yoon-Hyuk Huh","doi":"10.14368/jdras.2021.37.4.177","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.177","url":null,"abstract":"Clinical applications of translucent zirconia as well as traditional zirconia (3 mol% yttria stabilized tetragonal zirconia polycrystal, 3Y-TZP) are increasing. For this reason, studies on factors affecting the optical properties of dental zirconia have been continuously reported. The optical effect of dental zirconia may vary depending on the yttria content, the thickness of the prosthesis, the sintering process, polishing, glazing and cementation in laboratory and clinical procedures. Increasing the yttria concentration can reduce the masking effect. Translucency decreases as the thickness of the restoration increases, but the required thickness may vary depending on the properties of the zirconia block. The high-speed sintering method can shorten the manufacturing time, but in some cases, the translucency of the prosthesis may decrease. In addition, the optical properties can be affected by the surface roughness of zirconia and the polishing process. The use of an appropriate colored cement can help with the masking effect of zirconia and can be useful for color matching for more esthetic results. (J Dent Rehabil Appl Sci 2021;37(4):177-85)","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89011533","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

Regenerative procedure using rotary titanium brush for surface decontamination of peri-implantitis: 3 cases with a 2-year follow-up 旋转钛刷再生治疗种植体周围炎:3例，随访2年

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.259

Min-Woo Baek, Jeoung-A Yu, Seong-Ho Choi, Dong-Won Lee

引用次数: 0

Prosthetic rehabilitation by obturator considering the biomechanics in partially edentulous patient after maxillectomy 考虑生物力学的部分无牙患者上颌切除术后闭孔修复修复

Journal of Dental Rehabilitation and Applied Science Pub Date : 2021-12-31 DOI: 10.14368/jdras.2021.37.4.281

Kang-Shin Lee, Ju-mi Park, Seung-Geun Ahn, Jae-Min Seo, Yeon-Hee Park, Jung-Jin Lee

{"title":"Prosthetic rehabilitation by obturator considering the biomechanics in partially edentulous patient after maxillectomy","authors":"Kang-Shin Lee, Ju-mi Park, Seung-Geun Ahn, Jae-Min Seo, Yeon-Hee Park, Jung-Jin Lee","doi":"10.14368/jdras.2021.37.4.281","DOIUrl":"https://doi.org/10.14368/jdras.2021.37.4.281","url":null,"abstract":"Patients who went through maxillectomy can have severely impaired swallowing, mastication, and pronunciation functions because of palatal defects. Leakage occurs through the nasal cavity while eating, chewing becomes difficult due to the loss of teeth and alveolar ridges, and oral and nasal passages are not separated, leading to hyper-nasal sound, and significantly reducing the quality of life. To prosthetically reconstruct the defect, the weight of the obturator should be reduced as much as possible to minimize dropout because of gravity, and the bulb of the obturator should be properly extended into the defect to get additional retention and stability. In this case of a partially edentulous patient who underwent additional maxillary resection because of tumor recurrence, a metal framework was designed by applying the basic design principles of removable partial dentures. An obturator with improved retention, stability, and support was fabricated through functional impressions. The patient was satisfied with the improved facial expression, mastication, swallowing, and pronunciation, and showed stable occlusion and oral hygiene management during the follow-up period. (J Dent Rehabil Appl Sci 2021;37(4):281-93)","PeriodicalId":15594,"journal":{"name":"Journal of Dental Rehabilitation and Applied Science","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90257948","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