Restorative Dentistry and Endodontics最新文献_第3页

Effect of CQ-amine ratio on the degree of conversion in resin monomers with binary and ternary photoinitiation systems cq -胺比对二元和三元光引发体系树脂单体转化率的影响

Restorative Dentistry and Endodontics Pub Date : 2012-05-01 DOI: 10.5395/RDE.2012.37.2.96

Ho-Jin Moon, D. Shin

{"title":"Effect of CQ-amine ratio on the degree of conversion in resin monomers with binary and ternary photoinitiation systems","authors":"Ho-Jin Moon, D. Shin","doi":"10.5395/RDE.2012.37.2.96","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.2.96","url":null,"abstract":"Objectives: This study evaluated the effect of camphorquinone (CQ)-amine ratio on the C=C double bond conversion of resins with binary and ternary photoinitiation systems. Materials and Methods: Two monomer mixtures (37.5 Bis-GMA/37.5 Bis- EMA/25 TEGDMA) with binary systems (CQ/DMAEMA in weight ratio, group A [0.5/1.0] and B [1.0/0.5]) and four mixtures with ternary system (CQ/OPPI/DMAEMA, group C [0.1/1.0/0.1], D [0.1/1.0/ 0.2], E [0.2/1.0/0.1] and F [0.2/1.0/0.2]) were tested: 1 : 2 or 2 : 1 CQ-amine ratio in binary system, while 1 : 1 ratio was added in ternary system. The monomer mixture was cured for 5, 20, 40, and 300 sec with a Demetron 400 curing unit (Demetron). After each exposure time, degree of conversion (DC) was estimated using Fourier transform infrared (FTIR) spectrophotometer (Nicolet 520, Nicolet Instrument Corp.). The results were analyzed by ANOVA followed by Scheffe test, with p = 0.05 as the level of significance. Results: DC (%) was expressed in the order of curing time (5, 20, 40, and 300 sec). Group A (, , , ); Group B (, , , ); Group C (, , , ); Group D (, , , ); Group E (, , , ); Group F (, , , ). Conclusion: All the monomers with ternary photoinitiation system showed higher DC than the ones with binary system, until 40 sec. Concerning about the effect of CQ-amine ratio on the DC, group A converted into polymer more than group B in binary system. However, there was no significant difference among groups with ternary system, except group C when cured for 5 sec only.","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76363301","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: 8

Color and hardness changes in artificial white spot lesions after resin infiltration 树脂浸润后人工白斑病变的颜色和硬度变化

Restorative Dentistry and Endodontics Pub Date : 2012-05-01 DOI: 10.5395/RDE.2012.37.2.90

Ji Hoon Kim, H. Son, Juhea Chang

{"title":"Color and hardness changes in artificial white spot lesions after resin infiltration","authors":"Ji Hoon Kim, H. Son, Juhea Chang","doi":"10.5395/RDE.2012.37.2.90","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.2.90","url":null,"abstract":"Objectives: The purpose of this study was to determine the effect of resin infiltration technique on color and surface hardness of white spot lesion (WSL) with various degrees of demineralization. Materials and Methods: Ten human upper premolars were cut and divided into quarters with a window on the enamel surface. Each specimens were separated into four groups (n = 10) and immersed in demineralization solution to create WSL: control, no treatment (baseline); 12 h, 12 hr demineralization; 24 h, 24 hr demineralization; 48 h, 48 hr demineralization. Resin infiltration was performed to the specimens using Icon (DMG). color parameters of the enamel-dentin complex were determined using a spectroradiometer at baseline, after caries formation and after resin infiltration. Surface hardness was measured by Vickers Micro Hardness Tester (Shimadzu, HMV-2). The differences in color and hardness among the groups were analyzed with ANOVA followed by Tukey test. Results: Resin infiltration induced color changes and increased the hardness of demineralized enamel. After resin infiltration, there was no difference in color change () or microhardness among the groups (p","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85742857","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: 5

Endodontic management of a maxillary lateral incisor with dens invaginatus and external root irregularity using cone-beam computed tomography 锥形束计算机断层对上颌侧切牙牙槽内陷和外根不规则的根管治疗

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.50

Y. Lim, S. Nam, Sung-Ho Jung, D. Shin, S. Shin, K. Min

引用次数: 9

Evaluation of internal adaptation of dental adhesive restorations using micro-CT 显微ct评价牙粘接剂修复体的内适应性

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.41

Oh-Hyun Kwon, Sung-ho Park

{"title":"Evaluation of internal adaptation of dental adhesive restorations using micro-CT","authors":"Oh-Hyun Kwon, Sung-ho Park","doi":"10.5395/RDE.2012.37.1.41","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.1.41","url":null,"abstract":"Objectives: The internal adaptation of composite restorations with or without resin modified glass ionomer cement (RMGIC) was analyzed non-destructively using Microcomputed tomography (micro-CT). Materials and Methods: Thirty intact human teeth were used. The specimens were divided into 3 groups. In the control group, the cavities were etched with 10% phosphoric acid for 15 sec. Composite resin was filled into the cavity without adhesive. In group 1, light cured glass ionomer cement (GIC, Fuji II LC, GC) was applied as a base. The cavities were then etched, bonded, light cured and filled with composites. In group 2, the cavities were then etched, bonded, light cured and filled with composites without base application. They were immersed in a 25% silver nitrate solution. Micro-CT was performed before and after mechanical loading. One-way ANOVA with Duncan analysis was used to compare the internal adaptation between the groups before or after loading. A paired t-test was used to compare internal adaptation before and after mechanical loading. All statistical inferences were made within the 95% confidence interval. Results: The silver nitrate solution successfully penetrated into the dentinal tubules from the pulp spaces, and infiltrated into the gap between restoration and pulpal floor. Group 2 showed a lower adaptation than the control group and group 1 (p","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81100197","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: 12

Effect of different chlorhexidine application times on microtensile bond strength to dentin in Class I cavities 不同氯己定应用次数对ⅰ类牙本质微拉伸结合强度的影响

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.9

H. Kang, Ho-Jin Moon, D. Shin

{"title":"Effect of different chlorhexidine application times on microtensile bond strength to dentin in Class I cavities","authors":"H. Kang, Ho-Jin Moon, D. Shin","doi":"10.5395/RDE.2012.37.1.9","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.1.9","url":null,"abstract":"Objectives: This study evaluated the effect of 2% chlorhexidine digluconate (CHX) with different application times on microtensile bonds strength (MTBS) to dentin in class I cavities and intended to search for ideal application time for a simplified bonding protocol. Materials and Methods: Flat dentinal surfaces with class I cavities () in 40 molar teeth were bonded with etch-and-rinse adhesive system, Adper Single Bond 2 (3M ESPE) after: (1) etching only as a control group; (2) etching + CHX 5 sec + rinsing; (3) etching + CHX 15 sec + rinsing; (4) etching + CHX 30 sec + rinsing; and (5) etching + CHX 60 sec + rinsing. Resin composite was builtup with Z-250 (3M ESPE) using a bulk method and polymerized for 40 sec. For each condition, half of the specimens were immediately submitted to MTBS test and the rest of them were assigned to thermocycling of 10,000 cycles between and before testing. The data were analyzed using two-way ANOVA, at a significance level of 95%. Results: There was no significant difference in bond strength between CHX pretreated group and control group at the immediate testing period. After thermocycling, all groups showed reduced bond strength irrespective of the CHX use. However, groups treated with CHX maintained significantly higher MTBS than control group (p","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90190882","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: 5

Effect of fluoride concentration in pH 4.3 and pH 7.0 supersaturated solutions on the crystal growth of hydroxyapatite pH 4.3和pH 7.0过饱和溶液中氟浓度对羟基磷灰石晶体生长的影响

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.16

Haneol Shin, Sung-ho Park, Jeong-Won Park, Chan-Young Lee

引用次数: 1

Coronal microleakage of four temporary restorative materials in Class II-type endodontic access preparations 四种临时修复材料在ⅱ类根管通路预备物中的冠状微渗漏

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.29

Sang-Mi Yun, L. Karanxha, Hee-Jin Kim, Sung-Ho Jung, Sujung Park, K. Min

{"title":"Coronal microleakage of four temporary restorative materials in Class II-type endodontic access preparations","authors":"Sang-Mi Yun, L. Karanxha, Hee-Jin Kim, Sung-Ho Jung, Sujung Park, K. Min","doi":"10.5395/RDE.2012.37.1.29","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.1.29","url":null,"abstract":"Objectives: The purpose of this study was to evaluate the microleakage of 4 temporary materials in teeth with Class II-type endodontic access preparations by using a glucose penetration model. Materials and Methods: Glucose reaction test was performed to rule out the presence of any reaction between glucose and temporary material. Class II-type endodontic access preparations were made in extracted human premolars with a single root (n = 10). Each experimental group was restored with Caviton (GC), Spacer (Vericom), IRM (Dentsply-Caulk), or Fuji II(GC). Microleakage of four materials used as temporary restorative materials was evaluated by using a glucose penetration model. Data were analyzed by the one-way analysis of variance followed by a multiplecomparison Tukey test. The interface between materials and tooth were examined under a scanning electron microscope (SEM). Results: There was no significant reaction between glucose and temporary materials used in this study. Microleakage was significantly lower for Caviton and Spacer than for Fuji II and IRM. SEM observation showed more intimate adaptation of tooth-restoration interfaces in Caviton and Spacer than in IRM and Fuji II. Conclusions: Compared to IRM and Fuji II, Caviton and Spacer can be considered better temporary sealing materials in Class II-type endodontic access cavities.","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78260208","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

Effects of canal enlargement and irrigation needle depth on the cleaning of the root canal system at 3 mm from the apex 根管扩大和灌洗针深度对离根尖3mm处根管系统清洁的影响

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.24

Ho-Jin Moon, C. Hong

{"title":"Effects of canal enlargement and irrigation needle depth on the cleaning of the root canal system at 3 mm from the apex","authors":"Ho-Jin Moon, C. Hong","doi":"10.5395/RDE.2012.37.1.24","DOIUrl":"https://doi.org/10.5395/RDE.2012.37.1.24","url":null,"abstract":"Objectives: The aim of this study was to test the hypothesis, that the effectiveness of irrigation in removing smear layer in the apical third of root canal system is dependent on the depth of placement of the irrigation needle into the root canal and the enlargement size of the canal. Materials and Methods: Eighty sound human lower incisors were divided into eight groups according to the enlargement size (#25, #30, #35 and #40) and the needle penetration depth (3 mm from working length, WL-3 mm and 9 mm from working length, WL-9 mm). Each canal was enlarged to working length with Profile.06 Rotary Ni-Ti files and irrigated with 5.25% NaOCl. Then, each canal received a final irrigation with 3 mL of 3% EDTA for 4 min, followed by 5 mL of 5.25% NaOCl at different level (WL-3 mm and WL-9 mm) from working length. Each specimen was prepared for the scanning electron microscope (SEM). Photographs of the 3mm area from the apical constriction of each canal with a magnification of , , , were taken for the final evaluation. Results: Removal of smear layer in WL-3 mm group showed a significantly different effect when the canal was enlarged to larger than #30. There was a significant difference in removing apical smear layer between the needle penetration depth of WL-3 mm and WL-9 mm. Conclusions: Removal of smear layer from the apical portion of root canals was effectively accomplished with apical instrumentation to #35/40 06 taper file and 3 mm needle penetration from the working length.","PeriodicalId":21126,"journal":{"name":"Restorative Dentistry and Endodontics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76912591","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: 1

Effects of matrix metallproteinases on dentin bonding and strategies to increase durability of dentin adhesion 基质金属蛋白酶对牙本质结合的影响及提高牙本质粘附持久性的策略

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.2

Jung-Hyun Lee, Juhea Chang, H. Son

引用次数: 0

Pulp necrosis following luxated injury to teeth in a patient with uncontrolled type II diabetes mellitus: a case report 2型糖尿病患者脱位后牙髓坏死1例报告

Restorative Dentistry and Endodontics Pub Date : 2012-03-01 DOI: 10.5395/RDE.2012.37.1.61

Haneol Shin, Seung‐Jong Lee, I. Jung, Chan-Young Lee

引用次数: 0