Endodontics & dental traumatology最新文献

The sealing ability of an epoxy resin root canal sealer used with five gutta-percha obturation techniques. 环氧树脂根管密封剂与五种杜仲胶充填技术的密封性能。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006291.X

R. Moor, J. D. Boever

{"title":"The sealing ability of an epoxy resin root canal sealer used with five gutta-percha obturation techniques.","authors":"R. Moor, J. D. Boever","doi":"10.1034/J.1600-9657.2000.016006291.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006291.X","url":null,"abstract":"The purpose of the present study was to evaluate the apical sealing ability of an epoxy resin root canal sealer (AH-26) when used with different gutta-percha obturation techniques (i.e. cold lateral condensation, warm vertical condensation, hybrid condensation) and with Thermafil and Soft-Core obturators. Straight single-rooted teeth with mature apices were prepared according to the crown-down/step-back technique and divided in five groups of 45 teeth and one group of 12 control teeth. After root canal filling 15 teeth of each group were kept for 1 day, another 15 teeth for 1 week, and another 15 teeth for 4 months at 37 degrees C in vacutainers in 80% relative humidity. The 237 teeth were immersed in india ink for 90 hours, each root was split and sectioned longitudinally, and the maximum extent of leakage was measured using a stereomicroscope at x6 magnification. It became clear that leakage occurred whatever technique was combined with AH26 and that leakage increased with time. The amount of apical leakage and the number of leaking teeth in the Soft-Core obturator groups was significantly higher than all other 4 gutta-percha obturation techniques combined with AH26. In this respect, the hybrid gutta-percha condensation technique turned out to be superior to the four other condensation techniques.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 1","pages":"291-297"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006291.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507603","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: 28

The influence of sample dimensions on hydroxyl ion release from calcium hydroxide products. 样品尺寸对氢氧化钙产物中羟基离子释放的影响。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006251.X

P. Murray, P. Lumley, A. Smith, H. F. Ross

{"title":"The influence of sample dimensions on hydroxyl ion release from calcium hydroxide products.","authors":"P. Murray, P. Lumley, A. Smith, H. F. Ross","doi":"10.1034/J.1600-9657.2000.016006251.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006251.X","url":null,"abstract":"The purpose of this study was to compare the rate of hydroxyl ion release from commercially available setting and non-setting calcium hydroxide products. The rate of hydroxyl ion release is important, as this has been suggested to be the main factor in the therapeutic activity of these products. In total, hydroxyl ion release was measured from 1104 samples of Dycal, Life, Calasept and Hypocal in solution using in vitro titration. The rate of hydroxyl ion release was measured for up to 14 days, using two sizes of sample surface area. The dimensions of the exposed sample surface area was found to be an important physical constraint to the hydroxyl ion release from non-setting calcium hydroxide products, whereas this was not found to be the case with setting products. The range in hydroxide activity between products was found to be 298%. In rank order of hydroxide ion release, from the most to the least active was: Hypocal, Calasept, Life and Dycal. The differences in the rate of hydroxyl ion release from these products may have some implications for their clinical applications. It is suggested that in cases where the oral healing responses have been poorer than expected, the size and seal of prepared cavities could have negatively influenced the therapeutic release of hydroxyl ions from non-setting calcium hydroxide products.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"114 1","pages":"251-7"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006251.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507003","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: 13

Dentine chips produced by nickel-titanium rotary instruments. 镍钛旋转器械生产的牙本质芯片。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006258.X

D. R. Guppy, R. Curtis, T. Ford

{"title":"Dentine chips produced by nickel-titanium rotary instruments.","authors":"D. R. Guppy, R. Curtis, T. Ford","doi":"10.1034/J.1600-9657.2000.016006258.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006258.X","url":null,"abstract":"This study aimed to compare the cross-sectional shape of two nickel-titanium rotary instruments, namely ProFile and Quantec files, both ISO 25, 0.06 taper, and sought to relate this to the chips produced by cutting dentine. A limited comparison was made with stainless steel engine reamers. First, five files of each type were sectioned transversely at 12 mm, 8 mm and 4 mm from the tip and examined by scanning electron microscopy. The cutting angles were assessed by a direct measurement technique which allowed for the inclination of a cutting edge to the root canal. Second, eight samples of cutting debris were collected from instrumentation by each type of nickel-titanium file and four samples from the engine reamers. The major and minor axis, area and roundness of the dentine chips in each sample were measured using computerized particle analysis. The results demonstrated that all files had a negative cutting angle which varied at the different levels (ProFiles range 69.4 degrees to 58.4 degrees and Quantec range 74.8 degrees to 56.8 degrees). The consistency within files of the same type was good as demonstrated by low standard deviations, except for Quantec files at the 4 mm level where higher standard deviations of 4.1 degrees and 5.5 degrees for the two blades were found. The chip analysis showed significant differences between chips produced by ProFile and Quantec files (P < 0.05). The latter were larger and rounder. The chips from the ProFile and the engine reamer chips were similar in dimension (P > 0.05). No simple relationship existed between file geometry and the dentine chips produced during instrumentation.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 6 1","pages":"258-64"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006258.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507171","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

Cytotoxic effect of four root filling materials. 四种根填充物的细胞毒作用。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006287.X

I. Miletić, I. Anić, Z. Karlović, T. Maršan, S. Pezelj-Ribaric, M. Osmak

引用次数: 41

Bone-like tissue growth in the root canal of immature permanent teeth after traumatic injuries. 未成熟恒牙外伤后根管内骨样组织的生长。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006298.X

I. Heling, I. Slutzky-Goldberg, J. Lustmann, Y. Ehrlich, A. Becker

引用次数: 20

Treatment of traumatic dental injuries in a cohort of 16-year-olds in northern Sweden. 瑞典北部一群16岁青少年创伤性牙损伤的治疗。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006276.X

E. Borssén, A. Holm

{"title":"Treatment of traumatic dental injuries in a cohort of 16-year-olds in northern Sweden.","authors":"E. Borssén, A. Holm","doi":"10.1034/J.1600-9657.2000.016006276.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006276.X","url":null,"abstract":"The prevalence and yearly incidence of traumatic tooth injury between 1 and 16 years of age have been studied in a cohort of 16-year-olds, born in 1975, and residing in the County of Västerbotten. The study material comprised 3007 dental records from the Public Dental Health Service. Of these, 1040 contained information on dental injuries. Out of 1000 injured primary teeth, 32% were lost, either avulsed at the time of the accident or extracted due to complications. A majority (92%) of the extractions was performed at the first or second follow-up. A total of 690 tooth injury episodes had occurred in the permanent dentition, involving 981 teeth. In 10% of the teeth more than one diagnosis was recorded for the same tooth. 416 restorations were performed due to crown fractures, the majority at the emergency visit. 44% of the patients had to come back one or more times to revise the composite restoration. Complicated fractures or serious luxation injuries constituted only 5% of the total number of injuries in the permanent dentition. 77 (8%) of the traumatised teeth were treated endodontically. Two percent of the teeth with uncomplicated crown fractures required endodontic treatment due to pulp necrosis, while 28% of teeth with a combination of crown fractures and luxation injury were endodontically treated. Out of 6 avulsed incisors, 4 survived after endodontic treatment. A total of 7 incisors were lost as a consequence of the injuries. A specialist treated 4% of the patients.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 6 1","pages":"276-81"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006276.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507435","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: 43

Bacterial leakage in obturated root canals following the use of different intracanal medicaments. 使用不同的管内药物后封闭根管内细菌渗漏。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006282.X

C. Barthel, S. Zimmer, G. West, J. Roulet

{"title":"Bacterial leakage in obturated root canals following the use of different intracanal medicaments.","authors":"C. Barthel, S. Zimmer, G. West, J. Roulet","doi":"10.1034/J.1600-9657.2000.016006282.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006282.X","url":null,"abstract":"The aim of this study was to examine whether intracanal medication prior to root canal obturation has an inhibitory effect on corono-apical penetration of bacteria. 93 single rooted teeth were instrumented and sterilized with ethylene oxide. They were assigned to three control groups and four test groups with n = 20 each. For one week, they were dressed with different medicaments: The first group with a 5% chlorhexidine gel, the second with Ledermix, the third with a fresh mix of calcium hydroxide and water and the fourth without any medication. After obturation (lateral condensation, AH26) the roots were fixed between a top and a bottom chamber. The top chamber contained 3 mL trypticase soy broth with 10(8) Staphylococcus epidermidis CFU's/mL, whereas the bottom chamber contained sterile trypticase soy broth. For one year, the mounts were incubated at 37 degrees C. They were checked on a regular basis for turbidity in their bottom chambers indicating bacterial growth. None of the test samples leaked for three months. After one year, the calcium hydroxide group had only 6 leaking samples whereas the chlorhexidine group had 14, the Ledermix group 15, and the unmedicated group had 13 leaking samples. It may be concluded that under the conditions of this study, calcium hydroxide was the medicament of choice to avoid bacterial penetration of the root canal. Ledermix did not perform better than no premedication. Chlorhexidine was superior to Ledermix in the second third of the observation period.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 6 1","pages":"282-6"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006282.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507577","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: 21

Pulp capping with adhesive resin-based composite vs. calcium hydroxide: a review. 粘接树脂基复合材料盖髓与氢氧化钙的对比研究。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006240.X

A. Schuurs, R. Gruythuysen, P. Wesselink

{"title":"Pulp capping with adhesive resin-based composite vs. calcium hydroxide: a review.","authors":"A. Schuurs, R. Gruythuysen, P. Wesselink","doi":"10.1034/J.1600-9657.2000.016006240.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006240.X","url":null,"abstract":"The results of some short-term experiments suggest that direct capping of a vital pulp with the modern resin-based composite systems may be as effective as capping with calcium hydroxide. Total cavity etching with 10% phosphoric acid seems to be safe for the exposed pulp, but unless annulled by calcium hydroxide 35% phosphoric acid may be disastrous. For hemostasis and cleaning of the pulp wound both sodium hypochlorite and saline seem suitable, whereas the effectiveness of a 2% chlorhexidine solution is questionable. Although hard-setting calcium hydroxide cements may induce the formation of dentin bridges, they appear not to provide an effective long-term seal against bacterial factors. Within a few years, the majority of mechanically exposed and capped pulps show infection and necrosis due to microleakage of such capping materials and tunnel defects in the dentin bridges. It is unknown whether newer types of resin containing calcium-hydroxide-products will act as a permanent barrier. The cytotoxicity of the resin-based composites and the temperature rise during polymerisation may not be of concern, but microleakage, sensitisation and allergic reactions may pose problems. Based on available data, pulp capping with resin-based composites may be said to be promising, but more and long-term research is mandatory before the method can be recommended.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 6 1","pages":"240-50"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006240.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57506959","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: 146

The effect of zinc oxide-eugenol on the shear bond strength of a commonly used bonding system. 氧化锌-丁香酚对常用粘接体系剪切强度的影响。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006265.X

J. Leirskar, H. Nordbø

{"title":"The effect of zinc oxide-eugenol on the shear bond strength of a commonly used bonding system.","authors":"J. Leirskar, H. Nordbø","doi":"10.1034/J.1600-9657.2000.016006265.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006265.X","url":null,"abstract":"It has been claimed that eugenol has a detrimental effect on resin composites and dentin bonding systems. The aim of the present study was to examine whether zinc oxide-eugenol (ZOE) cement would reduce the efficacy of a bonding system. Human third molars were selected for the study, and cylindrical posts of a resin composite (Z100) were bonded vertically to a standardized flat dentinal surface, prepared on the buccal surface of the teeth and treated with Scotchbond Multi-Purpose. The tooth surfaces involved were either freshly cut, or had been exposed to ZOE cement for 6 days, with and without a subsequent thorough cleansing with ethanol. The bond strength in shear was measured after 24 hours. The results showed that ZOE cement had no negative effect on the bond strength of the resin composite (Z100) to dentin when this bonding system was used. The mean shear bond value for the specimens covered with ZOE cement for 6 days was 28.1 MPa. For specimens covered with ZOE cement and cleansed with 96% ethanol, the mean shear bond value was 23.5 MPa. The corresponding value for the controls was 19.0 MPa. These findings suggested that eugenol-containing temporary filling materials may be used safely prior to inserting resin based restorative materials, when Scotchbond Multi-Purpose is employed as the bonding agent.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"16 6 1","pages":"265-8"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006265.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507214","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: 45

Comparison of profiles of key periodontal pathogens in periodontium and endodontium. 牙周组织与牙髓组织主要病原菌的比较。

Endodontics & dental traumatology Pub Date : 2000-12-01 DOI: 10.1034/J.1600-9657.2000.016006269.X

S. Rupf, S. Kannengiesser, K. Merte, W. Pfister, B. Sigusch, K. Eschrich

{"title":"Comparison of profiles of key periodontal pathogens in periodontium and endodontium.","authors":"S. Rupf, S. Kannengiesser, K. Merte, W. Pfister, B. Sigusch, K. Eschrich","doi":"10.1034/J.1600-9657.2000.016006269.X","DOIUrl":"https://doi.org/10.1034/J.1600-9657.2000.016006269.X","url":null,"abstract":"Despite the established anatomical relationship between the periodontal and pulpal tissues, bacterial migration between endodontium and periodontium is still under discussion. The objective of this study was an investigation of profiles of periodontal pathogens in pulpal and periodontal diseases affecting the same tooth by means of 16S rRNA gene directed polymerase chain reaction (PCR). 31 intact teeth with both pulp and marginal infections were investigated. The diagnosis was based on clinical and radiological examination. Samples were taken from the gingival sulcus or periodontal pocket, respectively, with sterile paper points before trepanation of the teeth. After trepanation sterile paper points and Hedstroem files were used for taking samples from the root canal. Specific PCR methods were used to detect the presence of the following pathogens: Actinobacillus actinomycetemcomitans, Bacteroides forsythus, Eikenella corrodens, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia and Treponema denticola. In addition, quantitative competitive PCR was used to determine the total bacterial count of the samples. The investigated pathogens were proven to be present in the endondontium in all disease categories. Particularly in endodontic samples of \"chronic apical periodontitis\" and \"chronic adult periodontitis\" profiles of the periodontal pathogens were found. The results confirmed that periodontal pathogens often accompany endodontic infections and supported the idea that the periodontic-endodontic interrelationships should be considered as critical pathways which might contribute to refractory courses of endodontic or periodontal diseases.","PeriodicalId":77113,"journal":{"name":"Endodontics & dental traumatology","volume":"101 1","pages":"269-75"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1034/J.1600-9657.2000.016006269.X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57507310","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: 114