摘要:

AbstractHypodontia has been observed as one of the most common human dental developmental anomalies. It may be defined as agenesis of one or more teeth. The prevalence in the permanent lower central and lateral incisor region is low, ranging from 0.23 per cent to 0.08 per cent, respectively. This is compared with an overall incidence of hypodontia of 3.49 per cent. However, significant racial variation occurs. Treatment options generally available are: no treatment, closure of spaces orthodontically, or prosthetic replacement. Aetiology, associated anomalies, and factors involved in treatment choice are discussed. A report of four cases of hypodontia of the permanent lower anterior teeth and their orthodontic management is presented.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05645.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractAn unusual presentation of a chronic suppurative granuloma on the alar base area originating from a maxillary lateral incisor is reported. Treatment involved adequate endodontic therapy with simultaneous apical surgery and excision of the granuloma and sinus tract. Awareness of the possible dental origin of facial sinuses, despite their unusual location, is emphasized.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05646.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractBenign cementoblastoma is a rare benign odontogenic tumour of mesenchymal origin. A case of a 24‐year‐old man with benign cementoblastoma is presented. The lesion manifested as a round, radiopaque mass attached to the root of the left first molar of the mandible. The tooth was extracted and the lesion was removed. A diagnosis of benign cementoblastoma was made microscopically. There has been no evidence of recurrence during the three‐year follow‐up period. A review of the literature and a discussion of the histologic feature of this case are i

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05647.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractA case history and brief literature review of cerebral abscess related to dental therapy is presented. The 19‐year‐old male patient presented with a cerebral abscess caused byActinobacillus actinomycetam‐comitans.He was otherwise healthy, and had a recent history of periodontal surgery prior to the onset of symptoms. The patient was treated successfully with stereotactic aspiration and antibi

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05648.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractSurgery of the temporomandibular joint has a small but nonetheless important role in the overall management of temporomandibular disorders. Appropriate case selection is the mandatory requirement for successful surgical intervention in order to achieve the desired outcome of treatment, such as relief of symptoms and improved function. In this, the third article in the series, a general overview of the current surgical treatment modalities for temporomandibular disorders will be presented.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05649.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractSurgical repositioning of the dento‐skeletal components of the middle‐third of the face, combined with appropriate orthodontic treatment, can be used to improve function and aesthetics. However, the attainment of three‐dimensional stability following corrective jaw surgery continues to be a major problem in the postsurgical period.This paper examines the short‐term (six weeks postoperative) and long‐term (12 months postoperative) horizontal skeletal stability of Le Fort I maxillary advancement in 15 patients. The mean horizontal advancement of the maxilla was 8.76 ± 0.99 mm. Six weeks later, a mean relapse of 0.22 ± 0.19 mm was identified. The mean relapse at long‐term follow‐up was 0.61 ± 0.26 mm (6.96%).These results indicate that rigid miniplate and screw fixation of Le Fort I osteotomy undertaken to correct horizontal mid‐dentofacial deficiency is both statistically and surgically predictable and stable when reviewed up to twelve mo

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05650.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractCrown deformation during cementation was measured with a circumferential strain gauge. The effects of different seating forces (3,10 and 25 N), three different cements (Phosphacap, Ketac‐cem Applicap and Fuji‐cap I) and the presence or absence of venting on deformation and seating discrepancy were investigated. Forty (im of cement space was provided for all experiments. Venting increased deformation and reduced seating discrepancy, whilst increased force increased deformation and decreased seating discrepancy. Ketac‐cem Applicap allowed the lowest seating discrepancy with median crown deformation. It was possible, by using venting, low forces (10 N) and Ketac‐cem Applicap, to achieve a low marginal discrepancy with low crown deformation. Venting also diminished the seating discrepancy to acceptable levels when higher forces (25 N) were used with Pho

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05651.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractThis study aimed to assess oral health status and the social impact of oral conditions among dental patients with HIV infection in comparison with general dental patients receiving public‐funded care in Adelaide, South Australia. DMFT and CPITN indices were recorded by one dentist at a clinic for HIV dental patients. The data were compared with information from an existing survey of general dental patients. Social impact was assessed using the Oral Health Impact Profile questionnaire and responses from HIV dental patients were compared with responses from a telephone interview survey of Adelaide residents. HIV patients were aged 21 to 49 years (median *** 34), 90.7 per cent were male and 29.6 per cent had stage 4 HIV infection. Oral candida was present among 32.0 per cent, hairy leukoplakia among 24.1 per cent, HIV gingivitis among 18.5 per cent, and HIV periodontitis among 33.3 per cent. The DMFT index and its components did not differ significantly between HIV and general dental patients, while CPITN scores were lower among HIV patients (p = 0.01). However social impact among HIV patients was frequent: 64.6 per cent reported toothache, 43.7 per cent avoided foods, and 16.7 per cent avoided going out because of dental problems. HIV patients reported significantly greater levels of social impact than the Adelaide sample (p<0.01). Patients to this clinic frequently presented with severe and disabling oral conditions which were not adequately captured using standard clinical indice

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05652.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractThe prevalence of dental fluorosis in Australia and the United States of America has increased in both optimally fluoridated and non‐fluoridated areas. This has been attributed to an increase in the fluoride level of food and beverages through processing with fluoridated water, inadvertent ingestion of fluoride toothpaste, and the inappropriate use of dietary supplements. A major source of fluoride in infancy is considered to be infant formula which has been implicated as a risk factor for fluorosis in a number of studies. In this study the fluoride content of the infant formulae commonly used in Australia was determined. The acid diffusible fluoride of each powdered formula was isolated by microdiffusion and measured using a fluoride ion‐specific electrode. The fluoride content of milk‐based formulae ranged from 0.23 to 3.71 μg F/g and for soy‐based formulae from 1.08 to 2.86 μg F/g. When reconstituted, according to the manufacturer's directions, with water not containing fluoride, the formulae ranged in fluoride content from 0.031 to 0.532 ppm, with the average fluoride content 0.240 ppm. Using average infant body masses and suggested volumes of formula consumption for infants 1–12 months of age, possible fluoride ingestion per kg body mass was estimated. None of the formulae, if reconstituted using water containing up to 0.1 ppm F, should provide a daily fluoride intake above the suggested threshold for fluorosis of 0.1 mg F/kg body mass. However, W reconstituted with water containing 1.0 ppm F they should all provide a daily fluoride intake of above the suggested threshold for fluorosis with intakes up to 2–3 times the recommended upper ‘optimal’ limit of 0.07 mg/kg body mass. Under these conditions the water used to reconstitute the formulae would provide 65–97 per cent of the fluoride ingested. These figures are likely to be overestimates due to the intake of nutrients from other sources reducing formulae consumption and also due to the lower bioavallability of fluoride from milk‐based formulae. Further, it is generally believed that the maturation stage of enamel formation is the critical period for fluorosis development by chronic, above‐threshold fluoride exposure. The maturation stage for the anterior permanent teeth, however, is after the first twelve months of life where fluoride intake from infant formula consumption per kg body mass is highest. The level of fluoride in the commonly used Australian formulae would suggest that infant formula consumption alone is unlikely to be a risk factor for dental fluorosis in a non‐fluoridated community, but could make a major contribution to an infant's daily fluoride intake. However, prolonged consumption (beyond 12 months of age) of infant formula reconstituted with optimally‐fluoridated water could result in excessive amounts of fluoride being ingested during enamel development of the anterior permanent teeth and therefore may be a risk factor f

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05653.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

AbstractThe Dental Aesthetic Index (DAI) is an orthodontic index based on socially defined aesthetic standards. It is useful in both epidemiological surveys to identify unmet need for orthodontic treatment and as a screening device to determine priority for subsidized orthodontic treatment. An earlier study established the score of 36 on the DAI scale to identify handicapping malocclusions. The purpose of the present study was to determine decision points on the DAI scale that identify malocclusion severity levels less severe than handicapping.Two sources of data were used: 1) The frequency distribution of DAI scores on a probability sample of 1306 study models representing the untreated occlusions found in half a million adolescents. 2) The per cent distribution of US youths aged 12–17 by specified case severity reported in an assessment of the occlusion of youths? by the National Center for Health Statistics (NCHS). The decision points separating specific case severities on the DAI scale were determined by relating the proportions of the NCHS population with specified case severities to the cumulative percentages of the frequency distribution of DAI scores on the 1306 models.The NCHS report found 45.8 per cent of the sample to have normal or minor malocclusion with no need or slight need for treatment. DAI scores 25 and below corresponded to that proportion of the sample. The NCHS report found 25.2 per cent of the sample to have definite malocclusion with treatment being elective. DAI scores between 26 and 30 corresponded to that proportion of the sample. The NCHS report found 13 per cent of the population to have severe malocclusion with treatment highly desirable. Fifteen per cent were included in this category. DAI scores 31 to 35 corresponded to that proportion of the sampl

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1996.tb05654.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY