摘要:

SummaryTwenty subjects referred to a sleep laboratory for evaluation of sleep apnoea and found not to have any sleep disordered breathing problems were evaluated in this study. Bruxing events were recorded for frequency, duration, association with sleep stage and sleep position. The possible association between leg movements and bruxing events was also evaluated, but did not reveal any common mechanism. This study revealed that heart rate during bruxing events increased on average by 16.6%.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01177.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe aim of this study was to evaluate objectively and clinically the relative improvement in retention forces of complete dentures with the use of three proprietary denture fixatives. Using the UCL Retentiometer, retention forces of ill‐fitting maxillary complete dentures were measured with saliva alone as the interface medium and with the use of the three test denture fixatives in edentulous subjects over a peroid of 6 h. Results showed that forces with saliva alone were consistently and significantly lower when compared with the forces measured at any test period with the use of the test fixatives. A sixfold improvement in forces from the salivary baseline values was observed when these materials were used. However, the test fixatives showed substantial variations in retention forces depending on the physical formulation of the material. Whilst the powder Variety was effective immediately after its application, retention forces with the liquid and paste materials did not peak until 3 h post‐insertion. Measurements at 6 h post‐insertion stage showed that the powder fixative was the least effective of the three materials. This was mainly attributed to the rapid washing of the active ingredients by saliva because of the absence of oily base present in the paste and liquid mate

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01178.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe degree of polymerization of an acrylic resin repair material, as established by residual monomer estimation, was compared using three different polymerization methods, i.e. bench‐cure, hydroflask‐cure and microwave irradiation cure. The repair strength of a conventional heat‐polymerized resin was then assessed following repairs using each of these three methods. The lowest level of residual monomer was achieved with the microwave irradiation cure. It was also demonstrated that of the three methods, polymerization using microwave energy resulted in the strongest r

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01179.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryTwo chemically different glass ionomer cements (Ketac Fil® and ChemFil II® Caps) and three different methods of conditioning the surface for repair were evaluated. Specimens of each material were prepared, aged and sectioned. The cut surfaces were treated with either phosphoric acid, polyacrylic acid or a combination of phosphoric acid followed by polyacrylic acid. Freshly mixed glass ionomer cement was injected against the treated surface and allowed to set under simulated intra‐oral conditions. The specimens were then tested to failure in flexion after 7 days storage. The flexural strength of the repaired specimens was compared with that of control specimens of the same materials. The flexural strength of the repaired specimens was less than that of the controls. Treatment of the fractured surface with polyacrylic acid produced the weakest repair, and the use of phosphoric acid as the conditioning agent produced repaired specimens approximately 80% of the strength of the contr

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01180.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryPsychosocial, socio‐demographic and symptom characteristics have been shown to be associated with treatment outcome in patients with craniomandibular dysfunction (CMD). This study was performed to assess to what extent symptoms and correlates of CMD change as a consequence of conservative treatment for CMD. Treatment outcome in a group of CMD patients treated with a stabilization splint (experimental group) was compared with that of a group of patients with CMD who were not treated for CMD (control group). Patients in the experimental group had fewer symptoms of CMD at the end of treatment. However, several symptoms and correlates of CMD also improved in the control group (severity of pain, joint noises, ear symptoms). It was therefore questioned whether all improvements in symptoms and correlates of CMD in the experimental group could be attributed to the treatment received. Results suggest that the main improvement that might be ascribed to therapy was a decrease in ‘jaw symptoms’. There was a noticeable decrease in depression and an increased use of ‘planned actions and rational thinking’ as a coping style in the experimental group whereas these variables did not change in the control group. Implications and suggestions for further research are

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01181.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryIn a previous study it was concluded that only a few changes in symptoms related to craniomandibular dysfunction (CMD) could be attributed to therapy. It was suggested that psychosocial and socio‐demographic variables, as well as symptom characteristics, could be responsible for the unconvincing treatment outcome in patients treated with a splint. The present study was performed to investigate whether socio‐demographic characteristics, symptom characteristics and various psychosocial variables are associated with treatment outcome in patients with CMD treated with a splint. Treatment outcome was determined by using self‐reported follow‐up data. Results showed that patients with a negative treatment outcome were older, reported more and more severe symptoms and correlates of CMD, reported fewer stressors and more frequently considered health to be determined by external factors than patients who were treated successfully. The two groups could not be differentiated with regard to anxiety and depression. Results are interpreted with regard to the prediction of treatment

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01182.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe study attempted to assess methods of prevention of the formation of a contraction gap in a cylindrical enamel and dentine cavity. The influence has been investigated of the tensile bond strength of cement/dentine and cement/composite resin and the direct tensile strength during setting of light‐cured glass‐ionomer cements. The interface between composite resin/cement and cement/dentine were viewed and photographed by replica techniques under an SEM (Scanning Electron Microscope). The most noticeable finding was that an enamel and dentine cavity applicated with light‐ and auto‐cured glass‐ionomer cement generally presented with a small construction gap at the tooth restoration interface. However, the light‐cured glass‐ionomer base (Vitrabond) exhibited significantly better tensile bond strength to dentine and resin performance than the conventional glass‐ionomer tested. This study revealed that there was no clear relationship between the adhesion to dentine and the adaptation to the denti

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01183.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryCross‐sectional data were obtained from 1182 Japanese high school girls of 12 and 15 years old. The data were analysed for the prevalence of specific occlusal features and the prevalence of cardinal Temporomandibular Joint Dysfunction (TMJD) symptoms in different occlusion groups. The associations between occlusal features and TMJD symptoms were analysed by the Z‐analysis. The results were as follows: the prevalence of TMJD symptoms (total) was about 23% in both age groups examined. Noise had the highest prevalence of the specific TMJD symptoms in both age groups (16% and 11%). With age and for different occlusion groups, there was a significant increase in deviation on opening (P<0.001) and a decrease in pain and noise (P<0.05). No significant associations were found between the occurrence of TMJD symptoms (total) and occlusal features in all the examined occlusion groups. With respect to specific TMJD symptoms, however, the investigation of the different groups revealed a significant association (P<0.05) of intra‐arch occlusal (crowding) features with the occurrence of deviation on opening and with the occurrence of the combined TMJD symptoms which include deviation on opening. This indicates that crowding may be an important sign for predisposing TMJD. For the other single disorder symptoms (except pain), we did not find a significant relationship (P<0.05) with aspects of occlusion, which may confirm a multifactorial TMJD problem wherein occlusal features can have a contribution to

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01184.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe heat of reaction of dentine bonding agents alone and dentine bonding agents with dentine, hydroxyapatite and collagen were measured using a differential scanning calorimeter (DSC) in the isothermal mode. The bonding agents were Scotchbond® and Panavia Ex® adhesives, and GC Fuji‐II glass ionomer cement. The heat of reaction for Scotchbond® and Panavin Ex® bonding adhesives were 44.3 and 6.9 mcal/mg, respectively. Furthermore, results support the view that the glass ionomer cements adhere to tooth structure by chemical bo

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01185.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryA group of patients with a myogenous origin of craniomandibular disorders was found to show a variation of condylar asymmetry with age. The curve obtained by plotting patient age against their asymmetry index was parabolic in nature. This differed from a group of patients with an arthrogenous origin of pain, where a linear correlation with age, with a negative slope, had previously been found. The mean asymmetry index for this group of patients was found to be 23.77%. This is higher than that reported for a group of patients with a craniomandibular disorder of arthrogenous origin, namely 18.76%. It appears that these two groups differ in the variation of condylar asymmetry with age.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01186.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY