RÉSUMÉ
Implant failure has been associated with factors such as poor bone quality, insufficient bone volume, implant instability, unfavorable implant loading, and smoking habits. Infections and host responses may also be important factors in dental implant failure. The objectives of the present study were to identify various explanatory factors associated with titanium implant failure. Forty subjects with stage 1 non-osseointegrated titanium dental implants (NOTI) ad modum Brånemark and 40 age- and gender-matched control subjects with successfully osseointegrated titanium implants (SOTI) were studied. Clinical data and gamma G immunoglobulin (IgG) antibody titers were studied. An independent t test revealed that significantly longer implants were placed in subjects with SOTI (P < .05). Statistically significant differences in bone shape and resorption (BSR) scores were found between SOTI and NOTI (P < .05). Logistic regression analysis identified 3 significant explanatory outcome variables: serum antibody avidity scores for Bacteroides forsythus (P < .0001), serum antibody titers to Staphylococcus aureus (P < .001), and the BSR scores (P < .05). Antibody avidity to B forsythus and antibody titer to S aureus were therefore the 2 most important factors associated with early implant failures and with a significant predictive ability. This indicates that immunologic factors are involved in osseointegration.
Sujet(s)
Implants dentaires , Échec de restauration dentaire , Sujet âgé , Anticorps antibactériens/sang , Bacteroides/immunologie , Densité osseuse , Études cas-témoins , Pose d'implant dentaire endo-osseux , Conception de prothèse dentaire , Femelle , Humains , Modèles logistiques , Mâle , Adulte d'âge moyen , Ostéo-intégration/immunologie , Infections dues aux prothèses , Études rétrospectives , Fumer , Staphylococcus aureus/immunologie , Statistique non paramétriqueRÉSUMÉ
This study examined whether it is possible to restore an edentulous mandible with a complete-arch fixed prosthesis retained by only 4 implants without decreasing the survival rate. One hundred nineteen patients received complete-arch mandibular prostheses retained by 4 implants. Most patients were followed for 3 years or more. All patients followed a routine protocol, including annual check-ups and regular radiographic examinations. Twenty-one patients dropped out. Radiographic measurements used the threads of the implants as a basis for comparison. No indication was found that the number of supporting implants could have influenced the observed frequency of technical and surgical complications. Three implants were lost, 2 after 1 year and 1 after 5 years. A statistically significant difference in bone loss between the mesial and distal implants was found. The number of fractured resin teeth in mandibular prostheses was higher when patients had an implant-supported prosthesis in the maxilla. The present study revealed an implant survival rate of 98.6% after 5 years. Therefore, it was concluded that there may not be a need for more than 4 implants to support a fixed mandibular prosthesis, when implants at least 10 mm long can be used.
Sujet(s)
Prothèse dentaire implanto-portée , Résines acryliques , Sujet âgé , Sujet âgé de 80 ans ou plus , Échec de restauration dentaire , Femelle , Études de suivi , Humains , Mâle , Mandibule , Adulte d'âge moyen , Dent artificielle , Résultat thérapeutiqueRÉSUMÉ
The objectives were to study the progression rate of approximal caries in 14 to 19-year-old adolescents and to assess the influence of experience of previous caries as a predictor of caries progression during the following years. The study population comprised 100 adolescents, all 19 years old, randomly selected. In all, there were 93 adolescents included in the study, for whom all sets of bitewing radiographs from 14 up to and including the age of 19 were assessed with respect to approximal caries. It could be noted that 32% of the adolescents had had at least one bitewing examination every year from 14 to 19 years of age. At the age of 14, 38% of the males and 24% of the females were radiographically without any sign of caries lesions (caries-free). The median survival time of initial caries in the present study was >5 years, while for manifest caries it was 3.2 years. It was found that 37% of the surfaces with manifest caries in males and 18% of the corresponding surfaces in females were restored within a year. The results show that experience of previous caries does not seem to be a significant indicator and does not influence when the next radiographic examination should be performed. It is thus concluded that individualized bitewing examination is the exception rather than the rule.
Sujet(s)
Caries dentaires/épidémiologie , Caries dentaires/anatomopathologie , Adolescent , Adulte , Caries dentaires/imagerie diagnostique , Évolution de la maladie , Femelle , Humains , Incidence , Études longitudinales , Mâle , Biais de l'observateur , Radiographie , Études rétrospectives , Analyse de survie , Suède/épidémiologieRÉSUMÉ
A random sample of all 19-year-olds in four counties in the middle of Sweden in 1994 constituted the group studied. The material consisted of posterior bitewing radiographs from 511 19-year-old patients. The purpose was to study the prevalence and distribution of initial and manifest caries. It was found that on the manifest caries level 56% of the subjects were 'free from caries', in good correspondence with the official epidemiological data from the Swedish National Board of Health and Welfare, but only 27% when initial caries was added. Initial caries lesions constituted 90% of all lesions. The distribution of caries was highly skewed on the manifest caries level whereas initial caries had a broader distribution. Thus, on the surface level 75% of the individuals had 16% of all manifest caries and restorations, and 33% of all initial caries. A high correlation was found between initial and manifest caries, besides increasing with the number of initial lesions. Thus, only 2.5% of individuals without initial caries had manifest caries, compared to 54% of individuals with more than eight affected surfaces. A correlation was also found between the prevalence of manifest caries and restoration. The prevalence of initial caries and its obvious significance for further caries development should be a reason for finding new strategies in caries prevention on a population basis.
Sujet(s)
Caries dentaires/épidémiologie , Adulte , Indice DCAO , Caries dentaires/classification , Caries dentaires/imagerie diagnostique , Caries dentaires/prévention et contrôle , Émail dentaire/imagerie diagnostique , Restaurations dentaires permanentes/statistiques et données numériques , Dentine/imagerie diagnostique , Femelle , Humains , Mâle , Biais de l'observateur , Surveillance de la population , Prévalence , Radiographie rétrocoronaire , Suède/épidémiologieRÉSUMÉ
Seventy consecutive adolescents were examined to evaluate radiographic examinations as an aid to orthodontic diagnosis and treatment planning in combination with clinical examination. The clinical examination included dental impressions and extra- and intraoral photographs. The radiographic examination comprised a panoramic radiograph, a lateral cephalogram and six intraoral anterior periapical radiographs. Initially, only records from the clinical examination were used for diagnosis and treatment planning. If required, the dentist could choose any of the radiographs to accomplish the task. The number of radiographs ordered, the sequence of ordering and any change in diagnosis and treatment plan caused by the radiographs were registered. In 29% of the cases the initial diagnosis, based on the clinical examination, study models and photographs, coincided with the final diagnosis. In 93% of all cases the initial treatment plan coincided with the final one. Although the panoramic examination was the most common choice, it had only a minor effect on diagnostic and treatment decisions, while the cephalometric examination had a major impact on the diagnosis. In most cases the clinical examination, supplemented with study models and photographs, can provide adequate information for orthodontic treatment planning. The result stresses the importance of using individually based selection criteria for radiographic examination in order to prevent radiographs being obtained routinely.
Sujet(s)
Malocclusion dentaire/imagerie diagnostique , Orthodontie correctrice , Planification des soins du patient , Adolescent , Céphalométrie , Enfant , Prise de décision , Arbres de décision , Technique de prise d'empreinte , Femelle , Humains , Mâle , Malocclusion dentaire/diagnostic , Malocclusion dentaire/thérapie , Modèles dentaires , Biais de l'observateur , Tissu périapical/imagerie diagnostique , Photographie (méthode) , Examen physique , Radiographie rétrocoronaire , Radiographie panoramiqueRÉSUMÉ
The hypothesis of the present study was that previous experience of caries may serve as an indicator for individualised bitewing examinations in 15-19-old adolescents. One hundred adolescents, all 19 years old, were randomly selected from the files of public dental clinics in the County of Orebro. For 93 adolescents the total number of radiographs were summed for every patient from the age of 3 to 19 by assessing the files of public dental clinics and by assessing the files of the dental radiology department. All sets of bitewing radiographs from 14 up to and including the age of 19 were assessed with respect to approximal caries. The average number of intraoral radiographs exposed in a patient from the age of 3 through 19 was 24.4. It was shown that 70 to 80% of 14-19-year-old-adolescents had had a bitewing examination every year. The decision to perform a bite-wing examination in a 15-year-old was significantly correlated to the number of surfaces with initial caries at the age of 14. In the other age groups, none of the investigated variables was found to be significantly correlated to the performance of radiographic examinations.
Sujet(s)
Caries dentaires/imagerie diagnostique , Radiographie rétrocoronaire/statistiques et données numériques , Adolescent , Adulte , Loi du khi-deux , Humains , Biais de l'observateur , Dose de rayonnement , Répartition aléatoire , Études rétrospectives , Statistique non paramétrique , SuèdeRÉSUMÉ
The aim was to study the relation between risk attitude and knowledge in technical, patient-oriented, and organizationally related behavior within oral radiology. A questionnaire was mailed to 2000 randomly selected dentists listed in the register of the Swedish Dental Society, with a response rate of 69.3%. Regression analysis was used for analyzing the effects of the independent variables knowledge, risk attitude, continuing education in oral radiology, counties with specialists in oral radiology, type of practice, work experience, and sex on three categories of dependent variables: 1) technical behaviors: type of film, type of collimator, dose level, frequency of change of chemicals; 2) patient-oriented behaviors: use of patient protection barriers, strict indications for performing full-mouth X-ray examinations and bitewing radiography on new patients and recall patients; and 3) organizationally related behaviors: delegation of X-ray examinations to dental auxiliaries, influence on choice of collimator, influence on choice of film. Knowledge and education had strong direct effects for most of the dependent variables. The technical behaviors were mainly influenced by knowledge, education, and risk attitude, while organizationally related behaviors were influenced by type of practice and sex. The patient-oriented behaviors were influenced by a number of independent variables, such as education, type of practice, work experience, and sex. The present results indicate that both knowledge and the organizational context of dentists influence work.
Sujet(s)
Attitude du personnel soignant , Compétence clinique , Dentistes , Comportement en matière de santé , Radioprotection (spécialité)/enseignement et éducation , Adulte , Auxiliaires dentaires , Enseignement dentaire , Formation dentaire continue , Femelle , Connaissances, attitudes et pratiques en santé , Radioprotection (spécialité)/organisation et administration , Humains , Modèles logistiques , Mâle , Adulte d'âge moyen , Pratique professionnelle , Dose de rayonnement , Radioprotection , Radiographie rétrocoronaire , Radiographie dentaire/instrumentation , Facteurs de risque , Facteurs sexuels , Spécialités dentaires , Enquêtes et questionnaires , Technologie radiologique , Film radiographiqueRÉSUMÉ
OBJECTIVES: To develop a method of measuring Swedish dentists' knowledge of oral radiology and to relate the knowledge measure to a number of characteristics including risk attitude and use of low dose techniques. METHODS: A questionnaire was mailed to 2000 randomly selected dentists listed in the register of the Swedish Dental Society, with a response rate of 69.2%. An index for measuring knowledge was constructed, based on the answers to the questions. The measure was cross-tabulated with a number of demographic variables. RESULTS: Dentists with 5-25 years in practice had a higher level of knowledge than those with either fewer or more years in practice. Dentists working in the Public Dental Health Service had a higher level of knowledge compared with those in private practice. Specialists had a significantly higher level of knowledge compared with dentists who were not. Forty-two per cent of the dentists had not attended any course in oral radiology since graduation. Seventy-nine per cent of the dentists using a 'low' dose technique had a 'high' level of knowledge. The difference between dentists using a 'low-dose' and a 'high-dose' technique was statistically significant (P = 0.000). Dentists' attitude to risk is related to their knowledge. Seventy-one per cent of the dentists in counties with a specialist in oral radiology had a 'high level of knowledge' compared with 57% in those without. CONCLUSIONS: It is possible to study the relationship between knowledge and demographic variables by a survey. Work experience and extended education affect dentists' knowledge. There is an association between knowledge, use of low-dose techniques and risk attitude.
Sujet(s)
Dentistes/psychologie , Formation dentaire continue , Connaissances, attitudes et pratiques en santé , Radiographie dentaire , Radiologie/enseignement et éducation , Adulte , Attitude du personnel soignant , Loi du khi-deux , Compétence clinique , Femelle , Humains , Mâle , Adulte d'âge moyen , Enquêtes et questionnaires , SuèdeRÉSUMÉ
OBJECTIVES: To compare the sensitometric properties and accuracy in the diagnosis of approximal caries of two E-speed (Ektaspeed Plus and EV 57) and two D-speed (Ultra-speed and DV 57) films. METHODS: Speed and contrast for the four films were determined following 30 exposures for each film. Base plus fog density was measured on unexposed films and the increase was studied over a 18-month period. Seventy-five extracted premolars with known pathology were radiographed under standardized conditions and the radiographs assessed by nine observers for approximal caries. Receiver Operating Characteristic (ROC) curve technique was used to analyse the diagnostic accuracy. RESULTS: The sensitometric analysis showed that the Ektaspeed Plus film had the highest speed of the four films. At a density of 1.0 it was 2.28 times faster than Ultra-speed. The contrast of Ektaspeed Plus was comparable with that of the other films and base plus fog density plateaued at 0.4 ten months before expiry date. There were no statistically significant differences in diagnostic accuracy for white spot lesions between the four films. For cavitations there was a significant difference between EV 57 and DV 57 and Ektaspeed Plus (P = 0.005) but not between Ultra-speed and Ektaspeed Plus nor between Ultra-speed and EV 57 and DV 57. CONCLUSION: Ektaspeed Plus film is comparable with D-speed and a conventional E-speed film. Since it is at present the fastest available dental film it should be recommended for general dental practice.
Sujet(s)
Caries dentaires/imagerie diagnostique , Radiographie dentaire , Film radiographique , Analyse de variance , Faux positifs , Humains , Biais de l'observateur , Courbe ROC , Radiographie dentaire/instrumentation , Radiométrie , Analyse de régression , Reproductibilité des résultatsRÉSUMÉ
OBJECTIVES: To develop a method of measuring dentists' attitudes towards radiation hazards and to describe their prevalence among Swedish general dental practitioners. METHODS: A questionnaire was mailed to 2000 randomly selected dentists listed in the register of the Swedish Dental Society, with a response rate of 69.3%. An index for measurements of attitudes towards radiation hazards was constructed. RESULTS: Those dentists who showed high concern at radiation hazards also restricted their use of X-ray examinations. Years in practice and attendance at extended (one-week) courses in oral radiology both had significant associations with risk attitude. Inexperienced dentists showed less concern for radiation hazards compared with those more experienced and were less scrupulous in their choice of radiographic procedures. Gender, working alone, in the public dental health services or in private practice had no significant association with attitude. Dentists who considered regulations laid down by the Swedish National Institute of Radiation Protection as wholly adequate had a high care attitude. CONCLUSIONS: It is possible to study the relationship between attitudes and clinical behaviour by postal survey. Experience and continuing education affect dentists' attitudes towards risk and these attitudes in turn influence their clinical behaviour.
Sujet(s)
Attitude du personnel soignant , Dentistes/psychologie , Radiographie dentaire/statistiques et données numériques , Adulte , Études transversales , Analyse statistique factorielle , Femelle , Odontologie générale , Humains , Mâle , Adulte d'âge moyen , Modèles de pratique odontologique/statistiques et données numériques , Radioprotection , Enquêtes et questionnaires , SuèdeRÉSUMÉ
OBJECTIVES: To investigate the use of E-speed film and rectangular collimation by Swedish dentists as a means of dose limitation in relation to their attitudes towards radiation hazards. METHODS: A questionnaire was sent to 2000 randomly selected general dental practitioners to assess their use of different types of dental X-ray film and collimators and their attitudes and knowledge on methods of dose reduction. Logistic regression analysis was used to analyse the effects of postgraduate courses, gender, age, working alone, and working in the Public Dental Health Service (PDHS) or private practice (PP) on the type of film and collimator used. RESULTS: The response rate was 69.3%. D-speed film was used by 52% and E-speed film by 47%. Round open-ended 6 cm collimators were used by 42%, while 29% used rectangular collimators. Dentists in the PDHS, who viewed dental radiography as a 'high-risk' procedure and who had attended a one-week continuing education course were twice as likely to use dose-limitation techniques. CONCLUSIONS: Extended continuing education courses and working in PDHS promote the use of low-dose techniques. Prospects for changing the present situation are good, provided that efforts are made to increase the awareness of radiation hazards and knowledge of new techniques in under- and postgraduate education. Mandatory continuing education is proposed.
Sujet(s)
Attitude du personnel soignant , Dentistes/psychologie , Radiographie dentaire/instrumentation , Formation dentaire continue , Connaissances, attitudes et pratiques en santé , Humains , Modèles logistiques , Radiographie dentaire/méthodes , Enquêtes et questionnaires , Suède , Film radiographiqueRÉSUMÉ
OBJECTIVE: To evaluate the accuracy of the detailed narrow-beam (DNB) technique with the Scanora multimodal X-ray unit for the assessment of dental implants in severely resorbed maxillae as an alternative to conventional intra-oral radiography. METHODS: The DNB technique was used in 15 consecutive patients with maxillary overdentures supported by implants in the canine regions. Both conventional intra-oral radiographs and DNB radiographs were also obtained for a further 15 consecutive patients with maxillary fixed prostheses on implants in the canine region. The marginal bone height was scored in relation to the threads on the implants. RESULTS: Intra-observer agreement was 95%. There was an 84% agreement between the two radiographic methods: the difference was at most one thread and was not significant (p = 0.43). CONCLUSIONS: The DNB technique is an accurate alternative when conventional intra-oral techniques cannot be used properly.
Sujet(s)
Résorption alvéolaire/imagerie diagnostique , Implants dentaires , Mâchoire édentée/imagerie diagnostique , Maxillaire/imagerie diagnostique , Radiographie numérisée dentaire/méthodes , Pose d'implant dentaire endo-osseux , Prothèse dentaire implanto-portée , Overdenture , Humains , Maxillaire/anatomopathologie , Tomographie à rayons XRÉSUMÉ
The issue of changes in marginal bone levels around maxillary implants supporting overdentures has been studied very little because of radiographic difficulties when using conventional intraoral techniques. The present study used detailed narrow-beam radiography, which offers excellent opportunities to depict implants and the surrounding bone in severely resorbed maxillae. Marginal bone levels around implants in patients with overdentures were compared to corresponding bone levels in a group of matched control patients with fixed prostheses supported by osseointegrated implants. No statistically significant difference in marginal bone height was noted between the groups. This finding is not in accordance with an earlier report on continuous loss of marginal bone around many maxillary implants supporting overdentures.
Sujet(s)
Pose d'implant dentaire endo-osseux , Implants dentaires , Prothèse dentaire implanto-portée , Overdenture , Maxillaire/imagerie diagnostique , Résorption osseuse/imagerie diagnostique , Études cas-témoins , Canine , Humains , Maxillaire/chirurgie , Maladies du maxillaire supérieur/imagerie diagnostique , Ostéo-intégration , Radiographie dentaire/méthodesRÉSUMÉ
Patients treated at a prosthodontic department during the years 1968-73 with fixed restorations (at least five units) were followed up in 1991-92. The aim of the present study was to compare marginal and periapical periodontal conditions on radiographs from 1968-73 and 1991-92 and relate the changes to the results of the prosthodontic treatment. In the group in which the restorations remained unchanged, 90% of the abutments that were not root filled and showed no periapical radiolucency when the restorations were placed, were still not root filled and showed no periapical radiolucency at the follow-up examination. The corresponding figure for the group in which the restorations had been replaced was only 69%. The changes in marginal bone levels also differed between the groups. In the group with remaining restorations, 66% of the surfaces were given the same score on a five-point scale both in 1968-73 and in 1991-92. In the other group, only 54% were scored the same on both occasions. Thus, unfavourable changes in both periapical and marginal periodontal conditions were associated with poorer results for the fixed restorations.
Sujet(s)
Couronnes , Prothèse partielle fixe , Tissu périapical/imagerie diagnostique , Parodonte/imagerie diagnostique , Adulte , Processus alvéolaire/imagerie diagnostique , Couronnes/effets indésirables , Piliers dentaires , Prothèse partielle fixe/effets indésirables , Études de suivi , Humains , Études longitudinales , Adulte d'âge moyen , Maladies périapicales/imagerie diagnostique , Maladies parodontales/imagerie diagnostique , Radiographie , Traitement de canal radiculaire , Résultat thérapeutiqueRÉSUMÉ
A questionnaire was sent to all clinics in the Public Dental Health Service in Orebro County in 1989 and 1993. The survey comprised questions about X-ray film and developing technique. The questionnaire of 1993 was accompanied by questions on the type of dental X-ray film and collimator each dentist used, altogether 175 dentists. The results showed that Kodak Ektaspeed dental X-ray film was used by 53% of the dentists in 1993. The mean number of months to the expiry date for all film packages irrespective of film type increased from a mean of 7.5 months to a mean of 13 months from 1989 to 1993. Only 11% of the Ektaspeed film packages in 1989 had a base plus fog < or = 0.25, whereas the figure in 1993 was 30%. Rectangular collimation adjusted to the size-2 film (31 mm x 41 mm) was used by 36% of the dentists in 1993. In 1993, 88% of the clinics used automatic processing, and in 85% of the clinics both automatic and manual processing was used. The processing time and temperature varied greatly for both automatic and manual processing. The results indicate that film and developing procedures in Swedish general dental practice are not always in accordance with the recommendations and guidelines of the Swedish National Radiation Protection Institute (SSI) and that attempts should be made to improve dentists' behavior with regard to radiation safety. A major dose reduction would be achievable without jeopardizing diagnosis if the regulations of the SSI were followed by using the fastest available film and optimum developing procedures.(ABSTRACT TRUNCATED AT 250 WORDS)
Sujet(s)
Radiographie dentaire/statistiques et données numériques , Film radiographique/statistiques et données numériques , Filtration , Humains , Dose de rayonnement , Radiographie dentaire/instrumentation , Radiographie dentaire/normes , Enquêtes et questionnaires , SuèdeRÉSUMÉ
The image quality of intraoral radiographs used by general public health dentists in prosthodontic treatment planning was evaluated on 763 radiographs from 72 consecutive cases. It was found that 349 (45.7%) radiographs were without any type error and that 414 radiographs had a total of 577 errors. The most common errors were projection and film density errors. The number of submitted radiographs ranged from 2 to 22. Three prosthodontists evaluated if the radiographs gave "satisfactory" or "not satisfactory" information for approval or not of the proposed treatment. Of the 72 cases did 34 (47%) not meet the criteria for acceptance. For the cases where the prosthodontists found the radiographic documentation "satisfactory", the mean number of periapical radiographs was 10.8, while for cases found "not satisfactory" the mean number was 7.1. This difference was found to be statistically significant (p < 0.01). It was shown that nearly every seventh tooth planned to be used as an abutment was radiographically not properly documented. The poor radiographic quality found in this study and in other similar studies should be taken into serious consideration, especially as prosthodontic treatment accounts for a substantial part of the total costs for dental insurance in Sweden.
Sujet(s)
Piliers dentaires/normes , Radiographie dentaire/normes , Humains , Planification des soins du patient/normes , Prosthodontie/économie , Prosthodontie/normes , Odontologie en santé publique/normes , Qualité des soins de santé , SuèdeRÉSUMÉ
A new method for analyzing diagnostic accuracy is introduced. A diagnostic accuracy curve may be obtained by plotting receiver operating characteristic analysis data, P(A), as a function of exposure. By means of diagnostic accuracy curves the effects on diagnostic accuracy of tube potential, exposure, and size of carious lesions was studied. It was found that the effect of the tube potential on the accuracy of caries diagnosis is negligible. About 25% of the variation in diagnostic accuracy depends on the exposure and about 80% on lesion depth. With the lesion depth constant, about 75% of the variance in diagnostic accuracy depended on observer performance. The peak of a diagnostic accuracy curve indicates optimum performance. This is found at an exposure that gives a radiographic density of about 1 in enamel and dentin although the tolerable exposure increases with increased lesion depth.
Sujet(s)
Caries dentaires/imagerie diagnostique , Radiographie dentaire/normes , Absorptiométrie photonique , Humains , Microradiographie , Courbe ROC , Analyse de régression , Reproductibilité des résultatsRÉSUMÉ
A single tooth implant was placed in a boy aged 12 years and 3 months. The case has been followed for more than 4.5 years. The fixture did not move together with the adjacent teeth as the maxillary growth went on. There was no "loss" of marginal bone on the side of one adjacent tooth where the distance between implant and tooth was appropriate. But a "loss" of marginal bone (measured from the cemento-enamel junction) was noted on the other adjacent tooth where the fixture had been placed too close to the tooth.
Sujet(s)
Pose d'implant dentaire endo-osseux , Implants dentaires/effets indésirables , Maxillaire/croissance et développement , Dent artificielle , Facteurs âges , Résorption alvéolaire/étiologie , Enfant , Humains , MâleRÉSUMÉ
A number of studies have shown a low standard of radiographic image quality in general dental practices. Image quality was evaluated on 1094 radiographs from 100 consecutive cases submitted to a dental insurance office for approval of planned prosthodontic treatment. It was found that only 404 radiographs were without any type of error and that 690 radiographs had a total of 959 errors. The most common errors were projection and film density errors. The number of submitted radiographs ranged from one to 40. Nearly every fourth tooth proposed for treatment was not properly documented. The results also showed that 43 of 100 cases did not meet the criteria for acceptance for assessment of the proposed prosthodontic treatment. This means that they were incompletely documented radiographically so that the treatment plan could not be evaluated. This study suggests that new or additional radiographic documentation ought to be requested frequently before approval of proposed treatment plans.
Sujet(s)
Mâchoire partiellement édentée/imagerie diagnostique , Planification des soins du patient/normes , Assurance de la qualité des soins de santé , Radiographie dentaire/normes , Prothèse partielle fixe , Erreurs de diagnostic , Odontologie générale/normes , Humains , Demande de remboursement d'assurance , Assurance dentaire , Prosthodontie/normes , Reproductibilité des résultats , Odontologie d'ÉtatRÉSUMÉ
Flow D- and E-speed group dental X-ray films (DX-58 and EX-58) have recently been introduced to the market. By means of perceptibility curves these films were compared with commonly used dental X-ray films (Kodak Ultraspeed and Ektaspeed). No major differences between the films were found with regard to contrast and the subjectively assessed number of small contrast differences. The exposure for EX-58 had to be lowered by 66% and Ektaspeed by 39% compared with Ultraspeed film to obtain the same density. DX-58 and Ultraspeed were of the same sensitivity.