摘要:

SummaryA questionnaire was sent to all 189 edentulous patients with denture adaptation problems who were treated with fixed prostheses on osseointegrated oral implants during the period 1965–1978. One hundred and fifty‐two patients (80%) responded. Practically all had adapted well to the prostheses and were most satisfied with the rehabilitated oral function, including chewing ability. Four out of five patients regarded the bridge as part of their own body instead of a foreign object, and 90% would not hesitate to have the treatment performed again, if necessary. Parallel with the improved oral function the patients reported a definite reduction of psychosocial problems associated with their previous oral invalidity, and increased security and self‐e

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00746.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe clinical and pathological study was performed in order to determine the histo‐pathological and cytoimmunological characteristics of denture stomatitis. All specimens were biopsy materials from seventeen patients with denture stomatitis. Normal palatal mucosae from ten patients served as the control. In addition to the usual staining methods, naphtol AS‐D chloroacetate esterase stain and peroxidase‐antiperoxidase method were used to detect mast cells and plasma cells.Denture stomatitis could be divided into atrophic and hyperplastic types. The former showed a smooth and atrophic mucosa. The latter showed a large number of exophytic projections which were composed of marked acanthosis and submucosal fibrosis, and was further subdivided into granular and papillary subtype according to the size of projections. In the present study, there were six cases of the atrophic type, and eleven cases of the hyperplastic type (consisting of seven granular and four papillary subtypes).The hyperplastic type was more frequently observed in patients with partial dentures compared with complete dentures and was associated frequently with ill fitting of the denture base as well as agglutination of denture plaque.Cytoimmunological study revealed that there was a pronounced increase of plasma cells, especially IgG‐ and IgA‐producing cells, and a moderate increase of lymphocytes as well as mast cells in both types of denture stomatitis. Mast cells were always noted in the area with marked plasma cell infiltration, suggesting an intimate relation between both cells. These findings suggest that the immunological reactions play some role in the pathogenesis of denture s

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00747.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryOral health problems were identified among 653 residents of 40 long‐term care institutions in Vancouver, using a personal interview and a dental examination. Information on jaw function was analysed as part of this investigation to identify associations between the clinical signs of mandibular dysfunction and the complaints of the subjects, their occlusal instability, and the quality of their dentures. The sample population were predominantly female and over 75 years of age, and 42% had some natural teeth. Complaints of jaw dysfunction, usually sore muscles, were heard from 13% of the 488 subjects interviewed. The examination was performed on all of the subjects and revealed that 43% had unstable occlusal contacts, 37% were using loose or unstable dentures, and 20% had one or more clinical signs of jaw dysfunction. Joint noise was the most frequent sign detected and it was heard in a greater percentage of the women than men, while deviation of the mandible during mouth opening was observed with great frequency in the younger age groups. There was no apparent association found between the clinical signs of jaw dysfunction and the complaints of the subjects or the condition of their teeth or dentures. The study demonstrated that complaints and clinical signs of jaw dysfunction, with the exception of joint noises, were uncommon in this populatio

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00748.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe aim of this study was to investigate whether the amplitude distribution of electromyographic activity (EMG) in terms of muscular load revealed any differences between patients with painful masseter muscles and referents* during the chewing of an almond and of gum. The relative masticatory forces of the masseter muscle and the anterior temporal muscle during chewing were calculated by a transformation of the muscular load levels of EMG activity (μV) to load levels of relative masticatory force (%RVC). This was done by regression in reverse of an isometric reference voluntary contraction (RVC) for EMG versus bite force biting on a bite‐force sensor. The maximal bite‐force values for patients and referents were similar. The relative masticatory force for chewing an almond was higher than that for gum‐chewing. The peaks of the relative masticatory forces were similar for both patients and referents. During the chewing of an almond the relative masticatory forces of the masseter muscle below the peak load were higher for patients than referents. During gum‐chewing the patients used higher forces than referents for 70% of the total chewing time analysed. This also applied to the anterior temporal muscle when chewing an almond. Estimates of the peak masticatory forces were calculated in

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00749.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe aim of this study was to gain a better insight into the tooth‐loss pattern in terms of frequency, location and impaired occlusion. The sample, stratified according to socio‐economic class and age, condisted of 750 subjects. The investigation was done by questionnaire and clinical examination. The non‐response was small (15%). With increasing age, more teeth were missing. In the lower socio‐economic group more teeth were missing than in the higher socio‐economic group. The percentage of totally edentulous persons as well as the percentage of persons with one edentulous jas increased with age. Also, the percentage of antagonistic tooth contacts: first premolar, second premolar, second molar and first molar. In all strata the percentage of antagonistic contacts in the premolar area was larger than in the m

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00750.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe aim of this study was to gain a better insight into the location and frequency of prosthetic replacements and the consequences of tooth loss on oral function. The sample, stratified according to socio‐economic class and age, consisted of 750 subjects. The investigation was done by questionnaire and clinical examination. In the lower social levels the percentage of removable prostheses was lower than in the higher levels. An average of 60% of all open tooth spaces were not prosthetically restored. In the lower jaw 1 to 3 free‐end spaces were completed with removable partial dentures (RPD). The present study did not support a relationship between missing teeth or number of contacting pairs and the functioning of the dentition. The distribution of antagonistic contacts in the dental arch seems to be of more importa

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00751.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe purpose of the study was to determine the accuracy of measurements made of the mandible from panoramic radiographs. A comparison was made between measurements made directly from dry mandibles, and measurements made from panoramic radiographs of the same mandibles. The use of linear proportions reduced the errors of successive radiographic observations but failed to reveal left‐ and right‐side differences. A method was developed to demarcate two areas of the radiograph, one of which was defined by the crest of the residual alveloar ridge and the other independent of the alveolar ridge. Both areas were measured and their proportions calculated for each mandible observed. This proportional value was referred to as the Area Index. The method was applied to panoramic radiographs of individuals with complete dentitions. The inter‐observation error of the Area Index was found to be 4·9%. It was concluded that, in selected cases, panoramic radiographs can be used to provide information about resorption of the residual mandibular alveloa

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00752.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThis investigation studied relationships between signs and symptoms of potential mandibular dysfunction and limitations of maximum active depression and maximum active lateral excursion of the mandible in young adult males. Mouth opening capacity was not associated with symptoms and signs thought to be clinically indicative of the status of the mandibular locomotor system. Limitations of mandibular lateral excursions, on the other hand, were associated with signs and symptoms of potential mandibular dysfunction, but not with signs and symptoms from the tem‐poromandibular joint

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00753.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThis study reports on pressures recorded at the denture base–mucosal surface interface in four edentulous subjects. Four sites were selected, namely (a) the mid‐palatal region in the upper complete denture, (b) the labial to the mid‐line lower complete denture, (c) directly under the lower left and (d) right first molar teeth.The study examined the reproducibility of the pressure values obtained when the subjects chewed two test foods (carrot and peanut). The subjects repeated the chewing sequences on the same day and one subject was tested over a 3‐day period. The younger subjects and subjects with the shortest chewing sequences gave the most reproducible results. The two foods were shown to have different effects both on the pressure values recorded and the duration of the chewing sequence. Patients who transferred the food bolus from side to side during the chewing sequence affected the reproducibility of the results obtained from the lower denture tran

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00754.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SummaryThe electromyographical (EMG) activity of masticatory muscles during full clenching in the retruded contact position (RCP) and intercuspal position (IP) with and without a posterior stabilizing splint was studied. The linear envelope EMG signal from three bilateral muscles was recorded (masseter, anterior temporal and posterior temporal). Thirty‐seven subjects were evaluated. Clenching in the RCP without the splint and with the presence of an unstable occlusal contact inhibited the masseter muscle activity and reduced anterior temporal and posterior temporal muscle activity. The masticatory muscle activity returned to normal when clenching in the RCP with a splint that permitted stability in the dentition. EMG activity was the same in the IP with and without the splint.The results indicate that the determinant of maximal masseter isometric muscle contraction is the amount of stability in the dentition rather than the jaw position. If the dentition takes the major role of stabilizing the mandible, i.e., there is good intercuspation, the masseter muscle can exert maximal isometric contraction. If the stability is not provided by the dentition, i.e., there is a premature contact, the jaw muscles must contribute to the stabilization and reduce the magnitude of the maximal contraction to avoid damage to the structures involved in the compensatory stabilizatio

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1987.tb00755.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY