Abstract:
:The aim of this study was to measure the fatigue resistance of fibre-reinforced composite (FRC) reinforced polymeric parts of a removable orthodontic appliance beside the clasp. The effect of quantity and position of FRC-reinforcement were investigated. In addition, the influence of water storage on the fatigue properties was determined. The test specimens for eight groups (n=6) were manufactured from autopolymerizing acrylic resin. Polymethylmethacrylate pre-impregnated woven glass fibre was used as reinforcement of acrylic resin specimens at the region of steel wire clasp. The test specimens of the control group were not reinforced. In the second group, the test specimens were reinforced with one fibre layer (thickness: 0.06 mm) on the tension side, and in the third and fourth group with two fibre layers. Fatigue resistance was measured by applying repeated bending force to the clasp. The highest fatigue resistance values were achieved when the test specimens were fibre-reinforced with two fibre layers. The lowest fatigue resistance values resulted when the test specimens were not reinforced (P=0.046, anova). Water storage had a tendency to decrease the fatigue resistance in all fibre reinforced test specimen groups. The results suggest that use of the woven polymer pre-impregnated glass FRC-reinforcement increases the fracture resistance of orthodontic appliance made of acrylic polymer.
journal_name
J Oral Rehabiljournal_title
Journal of oral rehabilitationauthors
Rantala LI,Lastumäki TM,Peltomäki T,Vallittu PKdoi
10.1046/j.1365-2842.2003.01108.xkeywords:
subject
Has Abstractpub_date
2003-05-01 00:00:00pages
501-6issue
5eissn
0305-182Xissn
1365-2842pii
1108journal_volume
30pub_type
杂志文章abstract::Meniscectomy of the temporomandibular joint (TMJ) was frequently performed until a few years ago but now is seldom employed. This procedure induces important articular modifications but the complete extent of ultrastructural changes is still unknown. Twenty-one Wistar rats were submitted to unilateral meniscectomy. An...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2006.01647.x
更新日期:2006-10-01 00:00:00
abstract::This study investigated the subjective symptoms of craniomandibular disorder and the restriction in maximal mandibular opening of 891 elderly Singaporean citizens. A distribution of 22% of subjects (20% of the women and 26% of the men) reported subjective symptoms of craniomandibular disorders. The most common single ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1995.tb00794.x
更新日期:1995-06-01 00:00:00
abstract::In addition to bone-bonding biomaterials such as calcium phosphate ceramics and Bioglass/glass ceramics, an elastomeric poly(ethylene oxide) poly(butylene terephthalate) (PEO/PBT) segmented block co-polymer (Polyactive) was recently introduced. In contrast to ceramic biomaterials, Polyactive is a flexible material. In...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1995.tb01560.x
更新日期:1995-03-01 00:00:00
abstract::Oral food perception depends on somatosensory information that includes taste and can be modified by oral components and/or functions such as mastication. The purpose of this study was to describe the interplay between oral health, mastication and taste. A review according to the Preferred Reporting Items for Systemat...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,评审
doi:10.1111/joor.12535
更新日期:2017-12-01 00:00:00
abstract::Titanium (Ti) is thought to be a highly biocompatible material, and its clinical applications are becoming increasingly frequent. However, there have recently been some clinical papers reporting hypersensitivity and allergic reactions to Ti. The purpose of this study was to assess the corrosive properties of Ti in the...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2001.00690.x
更新日期:2001-06-01 00:00:00
abstract::The clinical performance of light polymerized resin-based composites (RBCs) is greatly influenced by the quality of the light curing unit (LCU). A commonly used unit for polymerization of RBC material is the halogen LCUs. However, they have some drawbacks. Development of new blue superbright light emitting diodes (LED...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2004.01399.x
更新日期:2005-02-01 00:00:00
abstract::This study investigated the prevalence of a preferred chewing side (PCS) and associations between a PCS and signs of temporomandibular disorders (TMD), antagonist contact and prosthetic restoration. A population representative sample of 4086 adults of the cross-sectional epidemiologic 'Study of Health in Pomerania' (S...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2842.2007.01790.x
更新日期:2008-08-01 00:00:00
abstract::The first purpose of this study was to translate the Oral Behaviours Checklist (OBC) into Dutch and to examine its psychometric properties. The second purpose was to examine the correlations between scores on the OBC and facial pain, while controlling for the possible confounding effects of psychosocial factors, such ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/joor.12114
更新日期:2014-02-01 00:00:00
abstract::We report here on a patient with bilateral cleft lip and palate (BCLP) and a missing premaxilla, who underwent dentoalveolar reconstruction of the cleft and premaxillary alveolus using endosteal implants after bone grafting. The patient, whose maxillary incisors and premaxilla were missing, had corticocancellous bone ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2003.00999.x
更新日期:2003-01-01 00:00:00
abstract::High-intensity eccentric-concentric contractions of the jaw-closing muscles induce muscle soreness, fatigue and functional impairment of the jaw, resembling the symptoms of myalgia, according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). However, it is claimed that repetition of similar exercise...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/joor.12656
更新日期:2018-08-01 00:00:00
abstract::A previous investigation identified three types of cuspal movement that occur as a result of polymerization shrinkage when extracted molar teeth are filled with a microfine or hybrid composite used in conjunction with a dentine adhesive. That investigation was extended further by dye penetration and SEM studies of the...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1990.tb00019.x
更新日期:1990-07-01 00:00:00
abstract::Peri-implant tissues of the single-crystal sapphire implant connected with neighbouring teeth by a metal bridge-work were examined clinically, radiographically, and histologically in ten monkeys. Professional tooth cleaning was performed during the study. At 3-12 months after insertion, most of the implants were firml...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1988.tb00147.x
更新日期:1988-01-01 00:00:00
abstract::In a sample of fifteen partially edentulous subjects assigned for immediate complete denture treatment, a correlation analysis was performed between pre-extraction facial morphology determined from lateral cephalograms, and EMG activity of the anterior temporal and masseter muscles in maximal clench and tapping of tee...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1983.tb00105.x
更新日期:1983-03-01 00:00:00
abstract::The purpose of this study was to make a longitudinal analysis of torque transmitted to a direct abutment tooth of a lower distal-extension removable partial dentures constructed with the conus crown telescopic system. Torque around the vertical and lateral axes of the tooth were measured during chewing of food at the ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1993.tb01616.x
更新日期:1993-05-01 00:00:00
abstract::This paper describes the application of a hydraulic intraoral jig to the establishment of the vertical dimension of occlusion for full denture construction. The device enables the patient to establish an occlusal height which is most comfortable without the intervention or guidance of the dentist. Six patients for who...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1988.tb00174.x
更新日期:1988-07-01 00:00:00
abstract::This study investigated how jaw kinematics, including cycle duration, three-dimensional (3-D) excursive ranges and velocities, and cycle shape, changed with increasing hardness of chewing gum. Twenty-six subjects (13 males and 13 females; mean age 23.6 +/- 2.5 years) with Class I normal occlusion were asked to chew tw...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2002.00862.x
更新日期:2002-07-01 00:00:00
abstract::The placement of dental implants in the molar region of the maxilla is often difficult because of insufficient bone volume and the inferior bone quality. In order to avoid these limitations, the pillar of bone, which is composed of the maxillary tuberosity, the pyramidal process of the palatine bone and the pterygoid ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2001.00741.x
更新日期:2001-02-01 00:00:00
abstract::The purpose of this study was to clarify whether the reverse cycle during chewing is abnormal in children with primary dentition. Children with normal primary dentition (N = 23; 5.5 +/- 0.8 years) and female adults (N = 25; 20.7 +/- 1.9 years) participated in this study. Chewing movement was recorded using an opto-ele...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2009.02006.x
更新日期:2010-01-01 00:00:00
abstract::Accuracy of fit of denture bases is critical to adequate retention. This study compared the dimensional change of a newer continuous-injection technique with a standard trial-pack technique as determined by measuring the posterior palatal border opening. The influence of palate shape and immersion were also assessed. ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1993.tb01511.x
更新日期:1993-01-01 00:00:00
abstract::The aims of this investigation were: (i) to study a group of dry mouth Sjögren's syndrome (SS) patients comprising individuals with pathological and non-pathological amounts of rest saliva and (ii) to compare these two categories of SS patients with a sex- and age-matched control group with respect to their periodonta...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2003.01088.x
更新日期:2003-04-01 00:00:00
abstract::The activity of anterior temporal muscle, the number of tooth contacts, and total duration of closure during maximal and habitual clenching were studied in varied chair positions. Fifteen subjects were evaluated. The means for the muscle activity of anterior temporal muscle during habitual clenching were 63.5-73.5% of...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:
更新日期:1997-03-01 00:00:00
abstract::This study investigated the experience of endossoseus implants in the U.K. - how success rates compare with other countries; the common causes of failure; early detection, definition and treatment of the failing implant. Information was gathered by means of a questionnaire sent to 120 centres in the U.K. Thirty-nine c...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,多中心研究
doi:10.1046/j.1365-2842.1999.00355.x
更新日期:1999-01-01 00:00:00
abstract::The periodontal regeneration of interproximal bone defects of the posterior teeth produced by guided tissue regeneration (GTR), with expanded Polytetrafluoroethylene barrier membranes and conventional therapy, was clinically evaluated in 20 intrabony periodontal defects in 10 patients. The material included the presen...
journal_title:Journal of oral rehabilitation
pub_type: 临床试验,杂志文章
doi:10.1046/j.1365-2842.1996.d01-206.x
更新日期:1996-09-01 00:00:00
abstract::The purpose of this in vitro study was to compare the efficacy of a new chemomechanical caries removal agent, Carisolv (MediTeam AB, Sävedalen, Sweden), with conventional slow-speed rotary instrument (bur). Fourteen extracted human molar teeth with deep dentine caries and no enamel coverage were selected for the study...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2003.01627.x
更新日期:2003-12-01 00:00:00
abstract::The effect on healthy dental pulp of thermal increases ranging from 8.9 to 14.7 degrees C was evaluated. These temperature increases correspond approximately to those caused by certain restorative procedures, such as tooth preparation with high-speed instruments and the fabrication of direct provisional crowns. Two cr...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.1997.00566.x
更新日期:1997-11-01 00:00:00
abstract::An I-bar clasp is one of the most popular direct retainers for distal-extension removable partial dentures. However, no adequate information is available on preferable shape as determined by biomechanics. This study aimed (1) to investigate, by finite element analysis (FEA), the dimensions and stress of I-bar clasps h...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2001.00673.x
更新日期:2001-05-01 00:00:00
abstract::The present study was designed to analyse the average depth of the microporosity of a nickel-chromium (Ni-Cr) system alloy (Verabond II). The metal surface was subject to one of the following surface treatment: (i) Electrolytic etching in nitric acid 0.5 N at a current density of 250 mA cm(-2); (ii) chemical etching w...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.2003.01102.x
更新日期:2003-05-01 00:00:00
abstract::Patients treated at a prosthodontic department during the years 1968-73 with fixed restorations (at least five units) were followed up in 1991-92. The aim of the present study was to compare marginal and periapical periodontal conditions on radiographs from 1968-73 and 1991-92 and relate the changes to the results of ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1996.tb01217.x
更新日期:1996-02-01 00:00:00
abstract::This study aimed to examine the association between the degree of recovery from dysphagia and changes in functional independence measure (FIM) items in stroke patients after acute phase by conducting a historical cohort study, because none explains the effects of activities of daily living (ADL) on recovery of swallow...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/joor.12212
更新日期:2014-12-01 00:00:00
abstract::Autopsy was performed on the right temporomandibular joint in eleven individuals with a mean age of 71 years. Standard positions indicative for protrusion, laterotrusive border movement and posterior opening movement were photographed in the sagittal plane. Size of movements of the disc and condylar head were recorded...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1978.tb01241.x
更新日期:1978-07-01 00:00:00