摘要:

SummaryIn this clinical 6‐year follow‐up study subjects with shortened dental arches (SDA,n= 55), characterized by the absence of molar support, are compared with subjects with complete dental arches (CDA,n= 52) with respect to occlusal stability. In addition, a small group of subjects with SDA and removable partial dentures in the lower jaw (SDA + RPD,n= 19) is included in this study. The aim of this study was to describe effects regarding occlusal stability in subjects with SDA during a 6‐year period. The applied parameters for occlusal stability are: number of occlusal contacts in the anterior region, overbite, interdental spacing and alveolar bone support.The results of this study show that: (i) SDA do provide durable occlusal stability; (ii) free‐end RPD do not contribute to occlusal stability in SDA; and (iii) SDA with periodontally involved teeth show continuing periodontal br

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01131.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThis study was performed to assess whether subgroups of patients with signs and symptoms of craniomandibular dysfunction (CMD) and a control group of dental patients with and without signs of CMD can be characterized by psychosocial variables, and whether there is evidence of stress‐induced muscle hyperactivity as a contributing factor in the development of signs and symptoms of CMD. A group of 127 care‐seeking patients and a control group of 158 dental patients completed a Questionnaire Battery (QB) designed to measure external stressors, stress‐related emotional reactions (anxiety and depression) and personal factors such as coping styles, health locus of control and personality. Patients with CMD with both a myogenous and an arthrogenous component reported more stress and stronger stress‐related emotional reactions than patients with either an arthrogenous or a myogenous CMD. However, patients with arthrogenous CMD did not differ on psychosocial variables from patients with myogenous CMD. In contrast to expectations, controls with signs of CMD reported more stress than patients with CMD. Compared with controls, CMD‐patients experienced less personal control over their health and they considered health to be determined by chance or fate. CMD‐patients also reported to cope differently with stress than controls. Analyses of covariance showed that the results were not influenced by differences in age, sex or pain reported in the head, neck and/or shoulders. Results were interpreted with regard to the psychophysiological theory of the development of signs and symptoms of CMD as a consequence of the progression of stress‐induced muscle hyperactivity. Differences between patients and controls in personal factors were interpreted with regard to treatment

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01132.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe effect of both the ethyl alcohol content of liquids and the type of plasticizer on the viscoelastic properties after gelation of tissue conditioners was studied by means of a stress relaxation test. The results are summarized as follows. The liquids containing the larger percentages of ethyl alcohol produced the larger flow after gelation. Furthermore, the ethyl alcohol content had a significant influence on changes in viscoelastic properties with the passage of time. Flow properties were found to reduce rapidly with time of storage with an increase in the ethyl alcohol content. The use of benzyl benzoate produced the larger flow after gelation than dibutyl phthalate, which in turn produced the larger flow than butyl phthalyl butyl glycolate. The type of plasticizer, however, was found to have no influence on changes in viscoelastic properties with the passage of time.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01133.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryMany principles guide preparation and fitting of provisional restorations. Their importance as a diagnostic tool is considered. Aesthetic, phonetic, functional, parafunctional and dysfunctional factors after evaluation in the provisional restorations have to be transferred to the master cast to incorporate them into the final restoration. A method for transferring morphology of provisional restorations to the master cast through preparation of a wax analogue fixed partial denture is presented. This method is precise, practical, suitable for most rehabilitation cases, and not clinically time‐consuming since most stages are carried out in the dental laborator

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01134.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThe aim of this study was to compare the electromyographic (EMG) activity of jaw‐closing muscles of individuals with normal and reduced periodontal bone support. Fourteen adult subjects with more than 24 remaining teeth and low levels of periodontal inflammation, were selected for the study. Subjects of the control group had 90% of the periodontal bone support left, while other subjects presented a reduction of 52% of the original periodontal bone. Chewing experiments were performed using silicone tablets, carrots and white bread. The EMG of masseter and anterior temporal muscles was performed bilaterally, using bipolar surface electrodes, and the EMG amplitude was full wave rectified, integrated and the area extension under the curve was used to access muscle activity. The results of the chewing experiments did not show any statistically significant difference in the EMG activity of the study groups, irrespective of the chewing stuff. The height of periodontal bone support did not seem to influence the electroactivity of jaw‐closing muscles, indicating that reduced periodontal support might equally be able to withstand masticatory loads. Hence, individuals with reduced periodontal bone support revealed a similar EMG activity compared to subjects with normal periodontal bone supp

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01135.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryAn epidemiologic study was conducted to investigate the relationship between craniomandibular dysfunction and malocclusion in 386 children aged 6 to 10 years with and without unpleasant life events.The results showed no statistically significant correlations between each clinical sign and each type of morphologic malocclusion in both groups. The chi‐square test, however, revealed statistically significant correlation between the pain in the temple region and posterior crossbite in the calm group but not in the not calm group. With respect to the functional malocclusion, the chi‐square test showed statistically significant correlations between interferences in the terminal hinge movement and TMJ tenderness and difficulties in opening wide. However, these correlations were found only in the calm group. When the definitional symptoms of craniomandibular dysfunction were aggregated, no statistically significant correlations were found between them and each type of malocclusion in both groups.The results of this study showed that the correlations between malocclusion and craniomandibular dysfunction were inconsist

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01136.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryThirty‐seven white Caucasian subjects with unsatisfactory dentures were tested for interocclusal thickness discrimination threshold. New dentures were prepared and the test was repeated on days 1, 4 and 90 (from delivery). Eight patients whose situation was still unsatisfactory were given osseointegrated implant anchored dentures and the test repeated at the same intervals. Results were analysed statistically. Improved denture fit was found to increase interocclusal sensitivity. Decreased sensitivity during follow‐up might indicate the need to check denture

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01137.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1994.tb01138.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY