摘要:

SummaryA comparison has been made between clinical and radiographical findings in a study of eighty‐nine patients suffering from craniomandibular disorders. In general it was found that condylar changes were more common in these patients than in earlier studies concerning the severe problems of craniomandibular disorders. A statistically significant correlation between clinical and radiographical findings was found for crepitation with osteophyte formation of the condyle (P<0.01). After clinical separation of the patients into two groups based upon the origin of pain, myogenous versus arthrogenous, no radiographical correlation could be made except for condylar osteophytes. With the clinical method used for separation of patients it was found that the clicking of the temporomandibular joint (TMJ) was more common among myogenous patients (P<0.05); crepitation was more common among arthrogenous patients (P<0.01), as was limited mouth opening (P<0.05) and deviation on opening (P<0.05). Radiographically, the only statistical difference between the two groups was found for osteophyte formation of the condyle, this was more common among arthrogenous patients (P<0.05). As the clinical method has been tested earlier, the results of this study lends support to the idea that conventional radiographical examination is of limited use in the initial diagnostics of craniomandibular disorders. Therefore new alternatives have to be develope

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00151.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryThis second report establishes that the success of treatment with resin‐bonded bridges was dependent upon many factors. Factors controlled by the clinician, such as case selection and treatment planning greatly influence the clinical success. It was possible to show that framework preparation and the amount of available enamel were significant factors, whereas isolation technique, type of retention mechanism and type of adhesive used were of less importance. Longitudinal studies are needed to confirm these observations.Seventeen clinicians placed 496 resin‐bonded bridges and splints with different retention mechanisms and bonding agents. These reconstructions were examined in regard to the failure rate and in regard to reattachment problems. Ninety‐seven per cent of the bridges and 90% of the splints were still in place after 1 year. For bridges and splints a 90% success rate was ascertained after 2

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00152.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00153.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryThe present study was performed to derive cephalometric standards for Saudi Arabian boys aged from 9–12 years. The sample was then compared with a British sample aged 9–12 years to detect statistical differences. The differences between both samples demonstrated a slightly prognathic Saudi face, more protrusive upper and lower incisors, and low Gonial and saddle ang

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00154.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryThe object of this study was to determine for amalgam restorations the relationship between marginal breakdown and (i) over‐ or undercarving; (ii) the amalgam margin angle (AMA); and (iii) the incidence of carious occlusal enamel adjacent to the restoration. Fifty‐two extracted human teeth with occlusal amalgam fillings from the Chicago (C) area and forty‐three teeth from the Jerusalem (J) area, were examined with a probe. Employing common clinical criteria, it was found that replacement of the fillings was indicated due to extensive marginal defects, in 45% of the C teeth, and 41% of the J teeth. The occlusal amalgam margins and the incidence of caries adjacent to these margins were studied on facio‐lingual sections. The incidence and the average AMA values for six margin types were measured on random sections and were found to be: all margins (100%, 67°); intact flush margins (31%, 69°); fractured flush margins (21%, 56°); undercarved margins which fractured (22%, 74°), or did not fracture (9%, 80°) near the cavity margin; margins with amalgam deficiencies (12%, 62°); and margins with separation between enamel and amalgam by remnants of linings (5%). Marginal breakdown was found in 42% of the margins and was associated mainly with flush carving at low AM As, and with broken flashes resulting from undercarving. Occlusal carious enamel was detected on 19% of the J teeth and none of the C teeth. Sixty‐three per cent of these lesions were associated with fractured unde

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00155.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryThis study examined and compared bilabial compression force difference limen (DL) values (the minimally perceivable difference between two compression forces) for a group of twenty normal‐speaking female subjects (mean age, 25 years) under conditions with and without the teeth clenched. In addition, measures of maximum bilabial compression force under conditions with and without the teeth clenched were obtained. Mean DL values obtained against a standard of 100 gm were 36 gm for the clenched condition and 38 gm with no clenching. Discrimination performance under these two conditions was not significantly different (P>0.05). Mean maximum bilabial compression force was 411 gm with the teeth clenched and 568 gm without clenching. This difference in performance was significant (P<0.01). This study provides initial normal data against which individuals with labial sensorimotor dysfunction can be compare

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00156.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryA dimethyl siloxane triacetoxy terminated silane, Type A adhesive, was modified with the base component of a medium grade polydimethyl siloxane with vinyl groups, MDX 4–4210, to produce a more pliable maxillofacial prosthesis. Force–displacement curves of various ratios of Type A adhesive/MDX 4‐4210 were determined and compared with force–displacement curves obtained from human subjects. Within the force range of 0.4 to 1.2 N, the force–displacement slopes obtained on human subjects compared favourably with some of the Type A adhesive/ MDX 4‐4210 test specimens. The force–displacement slopes for the elastomers and humans were not in agreement for force

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00157.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryThe applicability of an electronic thermometer CRAFTEMP® in taking intraoral temperatures was determined. Sublingal temperatures in ten young subjects with complete natural dentitions, and the temperatures at the denture base–mucosa interface and on the polished surface of both maxillary and mandibular complete dentures in ten elderly patients were measured. The results showed that there was a temperature difference between the polished surface of the maxillary denture and the denture base–mucosa interface. This was statistically significant in the female but not in the male subjects. No temperature difference could be demonstrated with any of the mandibular dentures. The CRAFTEMP® was found to be a convenient and reliable method for intraoral temperature measur

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00158.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryAn objective parameter for the electromyographic evaluation of the masticatory function of edentulous patients was studied. The normal ranges of the parameters for such subjects were also established.This study focused on the time parameter of electromyography, which is one of the most reproducible parameters. The variation coefficient of the time parameters (interval and duration) were revealed to be reliable and reproducible for the evaluation of masticatory functions.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00159.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SummaryA survey of commercial dental laboratories in Geneva and Vancouver has been carried out using both questionnaires and telephone enquiries. It was concerned with the types of fixed prostheses constructed and the impact of recent technical developments.The results of the study revealed that cosmetic factors played a major role in deciding the use of new techniques. Porcelain was used on the occlusal surface of most restorations and metal margins were preferred on PFM crowns. Precious and base alloys were used frequently to cast PFM protheses in Vancouver, whereas semi‐precious alloys were favoured in Geneva. Most of the laboratories used precious alloys for all‐metal restorati

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1988.tb00160.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY