Abstract:
OBJECTIVE:The aim of this study was to compare the fracture resistance of endodontically treated maxillary central incisors with incomplete crown ferrules after chewing simulation. MATERIAL AND METHODS:Forty caries-free maxillary central incisors were divided into 4 groups (n = 10). Endodontic treatment was performed. Teeth were decoronated 2 mm above the cemento-enamel junction (CEJ). Group I (control) provided a 360 degrees circumferential 2-mm ferrule. In group II, a 2-mm ferrule was present on the palatal aspect (status after occlusal overload), and in group III on the facial aspect (status after traumatic injury). In group IV, the ferrule was interrupted by bi-proximal cavitations (simulating caries treatment). The teeth received glass fiber reinforced posts and composite core restorations. All-ceramic crowns were adhesively cemented. Specimens were simultaneously exposed to thermal cycling and mechanical loading (1.2 million cycles; 6,000 cycles 5 degrees/55 degrees C) and finally statically loaded until failure in a universal testing machine (crosshead speed = 1 mm/min). For statistical analysis, the Kruskal-Wallis test was applied followed by the Mann-Whitney U-test as post hoc testing. RESULTS:The median fracture load values (min./max.) were: group I = 502 (326/561), group II = 658 (280/827), group III = 899 (396/1176), and group IV = 360 (279/646). Analysis revealed statistically significant differences between test groups, except between groups I and IV and groups II and IV. CONCLUSIONS:The fracture resistance of endodontically and post/core restored teeth is dependent on the degree of tooth conservation. An incomplete crown ferrule is associated with greater variation in load capacity and, despite high fracture values, inclines to fracture.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Naumann M,Preuss A,Rosentritt Mdoi
10.1080/00016350500331120subject
Has Abstractpub_date
2006-02-01 00:00:00pages
31-6issue
1eissn
0001-6357issn
1502-3850pii
J1G42835J161085Hjournal_volume
64pub_type
杂志文章abstract:AIM:Among all tooth types and movements, bodily labializing the upper lateral incisors is a challenging one. The main goal of this study is to introduce and analyze a method to labialize palatally erupted lateral incisors. MATERIALS AND METHODS:Five three dimensional finite element models were designed in SolidWorks 2...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.700059
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:To present a follow-up using the Dental Discomfort Questionnaire (DDQ) before and after the treatment of children, under the assumption that the number of toothache-related behaviors diminishes as a result of treatment, and to see whether this effect is related to the site of the carious teeth or to the treat...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350500264362
更新日期:2005-11-01 00:00:00
abstract::Qualitative and quantitative features of mammalian tooth enamel structure are increasingly being used in taxonomic and phylogenetic analyses, although the variability shown by these traits has not received adequate consideration. This study evaluates the variability displayed by nine quantitative parameters in deep, i...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358709094349
更新日期:1987-02-01 00:00:00
abstract:OBJECTIVE:The objective of this study is to evaluate clinical and patient reported outcomes of different bleaching products. MATERIALS AND METHODS:Thirty participants were randomly divided into three bleaching groups (n = 10). Bleaching was performed with high concentrations of hydrogen peroxide (HP) - Boost (40%) and...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,随机对照试验
doi:10.1080/00016357.2017.1376111
更新日期:2018-01-01 00:00:00
abstract::The aim of the study was to assess the oral health of a group of children, and to compare the findings with the results from an investigation performed 4 years earlier in children of the same age and living in the same area. The material consisted of 149 randomly selected 8-year-old children. The study included examin...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357509026354
更新日期:1975-01-01 00:00:00
abstract:OBJECTIVE:The main goal of periodontal treatment is to control infection and, thereby, curb disease progression. Recent studies have suggested that the use of a laser as an adjunct to scaling and root planing (SRP) might improve the effectiveness of conventional periodontal treatment. The aim of this study was to evalu...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,随机对照试验
doi:10.3109/00016357.2014.898088
更新日期:2014-11-01 00:00:00
abstract::The influence of different clinical variables on the marginal degradation of amalgam restorations was studied in a clinical trial of class-II amalgam restorations. Seven Scandinavian dentists using 5 different alloys placed 468 restorations in 210 patients. The marginal degradation was scored on impressions of the res...
journal_title:Acta odontologica Scandinavica
pub_type: 临床试验,杂志文章
doi:10.3109/00016359009029069
更新日期:1990-12-01 00:00:00
abstract:OBJECTIVE:To examine whether long-term utilization of dental care, treatment with fillings and crowns and persistent tooth loss between age 50 and 65 years associate with subsequent changes in OHRQoL from age 65 to 70 years. METHOD:In 1992, a census of 50-year-olds received invitation to participate in a questionnaire...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2018.1474249
更新日期:2018-11-01 00:00:00
abstract::Occlusar carious lesions from human molars, preserved in continuous humidity after extraction, were removed using conventional clinical techniques. Bacteriological samples were taken after rinsing the cavity with water only, after experimentally infecting the cavity and after treating uninfected cavities either with a...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357709064125
更新日期:1977-01-01 00:00:00
abstract:OBJECTIVES:Vinyl polysiloxane (VPS) is elastomeric dental impression material which, despite having very few reports of adverse reactions, has shown high levels of cytotoxicity that is difficult to be interpreted without referencing to the positive control material. Therefore, in this study, positive control VPS was de...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2013.879996
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVE:Non-human primates, dogs, rats, hamsters and ferrets, have frequently been used as laboratory animals in periodontal biology and pathology. In the past, mice have been used less for this purpose, but nowadays attract a lot of interest because gene knockout and transgenic technologies utilize mice primarily. I...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350802443474
更新日期:2009-01-01 00:00:00
abstract::Plaque formed during a 5-day xylitol or sucrose chewing gum diet was used as an irritating agent in bone and macrophage culture. The release of hydrolytic enzymes was monitored. The contents of protein, DNA, and ATP were analyzed, to characterize plaque formed during different dietary periods. The release of glycosida...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358309162320
更新日期:1983-06-01 00:00:00
abstract::The occlusal traits of Class II occlusion in the deciduous dentition include distal terminal plane of the second deciduous molars, distal canine relation, large overjet, and large overbite. Other findings are narrow upper dental arch and maxillary base and poor anterior spacing. Skeletally, Class II children differ le...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/000163598428356
更新日期:1998-12-01 00:00:00
abstract:OBJECTIVE:Toothbrush abrasion is significant in the development of tooth wear, particularly when combined with erosion. This in vitro study aimed to evaluate the impact of toothpaste slurry abrasivity and toothbrush filament stiffness on abrasion of eroded enamel. MATERIAL AND METHODS:Eroded enamel samples (hydrochlor...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350802195041
更新日期:2008-08-01 00:00:00
abstract::The adolescent growth of 212 randomly selected Swedish urban children has been investigated by using a graphical analysis of unsmoothed increments of height. The adolescent growth period has been divided into the pubertal spurt and the postpubertal period. On average, the pubertal spurt began at 10.0 years in girls, a...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358008997719
更新日期:1980-01-01 00:00:00
abstract:OBJECTIVE:This study investigated the association between dental fear and alcohol use disorder and smoking controlling for age, gender and attained level of education as well as anxiety and depressive disorders. MATERIALS AND METHODS:Nationally representative data on Finnish adults, 30 + years old (n = 5953), were gat...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.680902
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVE:This study aimed at providing the norms of polymorphic gender- variation in the sequence of permanent tooth emergence in Jordanian children and adolescents. MATERIALS AND METHODS:A total of 2650 Jordanian children and adolescents (1232 males and 1418 females) aged 4-16 years were examined for permanent tooth...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2011.647068
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVE:To investigate the gender-related differences in upper airway dimensions and hyoid bone position in Chinese Han children and adolescents (6-18 years) using cone-beam computed tomography (CBCT). MATERIALS AND METHODS:CBCT-scans of 119 boys and 135 girls were selected and divided into four groups (group 1: 6-9...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2014.978366
更新日期:2015-07-01 00:00:00
abstract::The aim was to construct and illustrate the use of diagnostic standards for recording of DFS incidence. Separate standards are presented for ranking of subjects; the mean "intermediate" DFS score per subject, which represented the majority decision of three dentists; and a certainty scale for individual tooth surfaces...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357709055996
更新日期:1977-05-01 00:00:00
abstract::An index for evaluation of dental wear based on Ryge's system comprising three satisfactory and two not acceptable categories was tested in two different age groups of individuals with brain damage. Group 1 consisted of 12 individuals, 3 women and 9 men, with a mean age of 34.5 years. Group 2 consisted of 13 individua...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358709096359
更新日期:1987-10-01 00:00:00
abstract::The purpose of this study was to assess the antimicrobial effect of TiF4 as compared with equimolar solutions of NaF, APF, and SnF2 and to evaluate the effect, if any, on bacterial growth on topically treated tooth surfaces. In an in vitro study, paper discs impregnated with 20 microliters of equimolar solutions of Sn...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359009005872
更新日期:1990-06-01 00:00:00
abstract::The aim of this study was to determine dental health status in two separate groups of Chilean and Polish refugees in Sweden. In Scandinavia, Sweden has the largest number of immigrants--1 million out of a population of 8.3 million. Since 1975, most immigrants have been refugees and their families. During 1978-82 Swede...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358809004742
更新日期:1988-02-01 00:00:00
abstract:OBJECTIVE:This study evaluated the influence of surface characteristics of various denture lining materials on the adherence of Candida albicans. MATERIALS AND METHODS:Four different types of materials (tissue conditioners, acrylic and silicone soft liners and hard reline materials) were selected. Disk-shaped material...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.671360
更新日期:2013-01-01 00:00:00
abstract::The influence of the nature of the root surface on the demineralization and remineralization processes within artificial fluoride-treated caries lesions was investigated using microscopic and X-ray microanalytical methods. Traces of fluoride were detected in the outer parts (about 25 micrometers) of the lesions after ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163502760148025
更新日期:2002-08-01 00:00:00
abstract::On the basis of the criteria of the California Dental Association (CDA), 66 CAD/CAM-manufactured ceramic class-II inlays (Cerec) were compared intraindividually after they had been cemented with either a chemically cured or a dual-cured composite resin luting agent in 27 patients. Plaque and gingival conditions, the o...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359509005995
更新日期:1995-10-01 00:00:00
abstract:OBJECTIVE:Semaphorin 3A (Sema3A) is an essential chemorepellant controlling peripheral axon pathfinding and patterning, but also serves non-neuronal cellular functions. Incisors of rodent are distinctive from molars as they erupt continuously, have only one root and enamel is present only on the labial side. The aim of...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2011.600717
更新日期:2012-05-01 00:00:00
abstract::A method to analyse cephalometric radiographs with the help of a computer has been described. With the system a cephalometric radiograph can be analysed and the results compared to corresponding analyses of individuals with ideal occlusion. The results can also be visualized as schematic figures of the patients. The c...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357809029087
更新日期:1978-01-01 00:00:00
abstract::Induction of mucosal immunity by oral immunization with protein antigen alone is difficult: potent mucosal adjuvants, vectors, or other special delivery systems are required. Cholera toxin (CT) has been shown to be an effective adjuvant for the development of mucosal vaccines and, when given with vaccine, induces both...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/000163501750541174
更新日期:2001-10-01 00:00:00
abstract::Over the past 2 decades, it has been suggested that with the generalized availability of fluoridated dentifrices, and coupled with a possible increased likelihood of fluorosis, the benefits of community-based fluoridation have receded. However, while this may be so for dentally motivated populations, there are convinc...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/000163599428616
更新日期:1999-12-01 00:00:00
abstract::Using dentist characteristics, our aim was to evaluate the reasons for replacements of fillings, the age of failed restorations in the posterior teeth of young adults, and replacement rates. Altogether 205 patient records from the Public Oral Health Service of the City of Vantaa, Finland were evaluated. Patient age wa...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163502762667333
更新日期:2002-12-01 00:00:00