Children's utilization of dental care in the NC Medicaid program

PURPOSE

To characterize the patterns of dental care in the North Carolina (NC) Medicaid Program for three- and eight-year-old children who began dental treatment in the 1985-86 and 1990-91 groups. We also compared the children's patterns of care by provider (general dentists versus pediatric dentists).

METHODS

Our extensive data set included claims, enrollment, and provider data. Children were assigned to one of five categories or patterns of care as follows: complete care, general anesthesia care, sporadic care, emergency only care, and no care. Statistical comparisons of the variables age, cohort year, and provider groups were made.

RESULTS

The use of Medicaid dental services by both age groups was severely limited in both yearly cohorts. Pediatric dentists tended to provide more complete and less sporadic care for both age groups and both yearly cohorts.

CONCLUSIONS

Financing dental care through Medicaid results in very low levels of complete care among enrollees, and any plan that limits referral to pediatric dentists might adversely affect the number of enrollees who receive complete care.

Congruence between self-reported and actually provided prosthodontic services among Swedish dentists

The purpose of this study, comprising two parts, was to investigate the congruence between answers given by general dentists in questionnaires concerning prosthodontic services and the recorded information on the services actually performed by each dentist. In Part I it is investigated whether questionnaire reports of weekly working hours devoted to prosthodontics can be used as indicators of actual prosthodontic production. Part II deals with the dentists' self-reported numbers of single crowns, fixed partial dentures (FPDs), and removable dentures. These reported services are compared with the services actually provided. Part I: A regression analysis indicates a lacking precision for the individual dentist, indicated by a relatively low explained variance (R2 = 0.20). However, a highly significant association is seen between the two production measures (P = 0.000). Part II: The congruence between stated and actually provided services is higher for single crowns and removable dentures than for FPDs. Bivariate regression models are statistically significant for all three services. In Part II, the reported weekly working hours used for prosthodontics covaries significantly with prosthodontic production, but the association is not as strong as in Part I. Although the precision in both Part I and Part II is low for the individual dentist, the questionnaire measure is found to be useful as an indicator in a population of dentists. It is concluded that the questionnaire data can be used as reasonably valid expressions of prosthodontic activity in population-oriented analyses among general dentists.

Dentists and oral cancer prevention in the UK: opinions, attitudes and practices to screening for mucosal lesions and to counselling patients on tobacco and alcohol use: baseline data from 1991

OBJECTIVE

To investigate the opinions, attitudes and practices towards oral cancer prevention among UK dentists as a baseline from which to measure the need for continuing education efforts in this area.

DESIGN AND METHOD

Postal questionnaire survey carried out in August 1991. A questionnaire with 13 test items was piloted at continuing education courses then distributed to all subscribers of the British Dental Journal with a postage paid return envelope. The aspects inquired into were recent attempts by dentists at updating their knowledge on oral cancer, their practical approaches to screening for oral mucosal diseases and follow-up actions after oral screening, their questions to patients regarding the major risk factors for oral cancer, their efforts towards behavioural counselling for patients and any constraints felt or experienced in this regard.

RESULTS

The questionnaire was circulated to 15,836 dentists. The response rate of 16% was poor but due to the many dentists circulated, 2519 responses were available for analysis. This large sample, though presumptively biased towards those interested in professional matters, showed an encouraging 84% claiming to perform screening of the oral mucosa routinely. Among these, 74% reported referral of screen detected cases to a hospital for further attention and only 4% would adopt a wait and see policy. Disturbingly, half of the respondents did not enquire about risk habits related to oral cancer and, among the other half who claimed to make such enquiries, only 30% routinely provided brief health education advice concerning these. Seventy-one percent agreed that giving advice against tobacco use is desirable but major constraints were identified, notably a lack of training, and frustration regarding patient compliance. There was even greater reluctance on the part of the respondents to enquire into the alcohol use of their patients and to provide advice on alcohol moderation.

CONCLUSIONS

Most of this large but unrepresentative sample of UK dentists were carrying out screening of the oral mucosa as a part of their prevention activities in 1991. However, the survey indicated a considerable need for improvement in the manner and extent of provision of health advice in respect of the major risk factors for oral cancer: such a substantial need amongst the presumptively better motivated implies that the need amongst the practitioner population at large is even greater.

A prospective survey of percutaneous injuries in orthodontists

This national survey provides documentation regarding typical orthodontic practice patterns in the United States, including the prevalence of percutaneous injuries. The sample reflects a similar geographic distribution of the population as a whole, with more practitioners located in areas with higher populations. Most practitioners in this sample were in solo full-time practice, averaging 35 hours per week, and treating patients for 47 weeks per year. A 20-day prospective period was used to collect data regarding exposure to percutaneous injuries. The study identified a mean percutaneous injury rate of 0.085 during a 20-day period for practicing orthodontists, a value that can be extrapolated to slightly less than one (0.99) percutaneous injury per orthodontist per year. The majority of these injuries (84%) occurred outside the mouth. This rate is approximately one third the rate reported for dentists in general practice.

Impact of HIV on the practice of dentistry in Houston, Texas

Texas ranks fourth in the nation in the number of documented HIV-infected and AIDS cases. The city of Houston has the highest prevalence of HIV-infected and AIDS cases in Texas. Dental health personnel have an ethical and legal obligation to provide dental services for HIV-infected persons. The purpose of this study was to assess the impact of HIV on the practice of dentistry in Houston. The study population was all dentists with a current Houston practice address registered with the Texas State Dental Board. A 41-item questionnaire was mailed to a stratified random sample of 500 dentists in Houston. The questionnaire covered four main areas: demographics, knowledge, attitudes, and behavior. About three-quarters of the dentists said they had treated an AIDS or HIV+ patient. Sixty percent of the dentists were not aware that breastmilk is a mode of transmission of HIV. There was a significant correlation between "ever treated" an HIV+ patients and "willingness to treat" an AIDS or HIV+ patient (p < 0.01). The experience of treating HIV-infected patients has a greater impact than knowledge alone in influencing dentists' behavior towards AIDS/HIV+ patients.

Initial treatment of traumatic dental injuries by dental practitioners

The aim of this study was to investigate the nature of initial treatment provided by dental practitioners to children aged 1-17 years with various types of traumatic dental injuries at public dental clinics in Tanzania. Questionnaires on initial treatment were mailed to 188 practitioners and returned by 138 (73%). The reported treatments were analyzed in relation to the dental practitioners' qualifications and area of practice. Extraction of injured teeth was frequently reported for 64% of the injuries and prescription of antibiotics was reported by 67%, 48% and 46% of the practitioners for soft tissue injuries, concussion, and alveolar fracture respectively. Practitioners working at the Faculty of Dentistry were less involved in treating dental trauma than those at urban and rural clinics (P = 0.001), while no significant association was found with the level of education of the practitioners. Equal proportions of practitioners, about one-third each, reported correct, unnecessary and wrong treatment options. The quality of the treatments provided could not be explained by background variables. It can be concluded that dental practitioners in Tanzania provide a lot of over-treatment for traumatic dental injuries. Therefore, it is suggested that efforts should be made to improve and standardize treatment methods in Tanzania.

Service provision trends between 1983-84 and 1993-94 in Australian private general practice

Patterns of service provision are expected to change over time, reflecting the dynamics of factors such as oral health status and trends in population demographics. The aim of this study was to identify trends in service provision over time. Data were collected from a random sample of Australian dentists in 1983-84, 1988-89, and 1993-94. Changes observed between 1983-84 and 1993-94 included a trend towards increased proportions of patients in older age groups, decreases in the percentage of persons receiving restorative care (from 40.2 per cent to 37.7 per cent) and prosthodontic care (9.3 per cent to 8.0 per cent), and increases in diagnostic (from 38.7 per cent to 46.0 per cent), preventive (20.9 per cent to 25.2 per cent), endodontic (5.3 per cent to 7.1 per cent), and crown and bridge services (3.1 per cent to 4.7 per cent) per visit. Other services such as orthodontic and general/miscellaneous services showed increases over the first half of the study period, but these did not continue between 1988-89 and 1993-94. The total number of services per visit increased over the study period for adult patients. These findings indicate changing patterns of practice over time, consistent with an increasing orientation towards prevention of disease and maintenance of a natural dentition.

National oral health survey Zimbabwe 1995: quality of restorations

In 1995, a second national oral health survey was carried out, ten years after the first. Application of a multi-stage sampling procedure resulted in 3709 persons being examined. The restorations were assessed using the criteria described by Kroeze et al (1990). Only ditches on the tooth/restoration margins that were wider than 0.4 mm were considered to be carious. The background variables studied were age, gender, type of location, socioeconomic status (SES) and level of education. The prevalence of restorations in all persons examined was 3.4 per cent. Restorations were found much more often among urban (95.5 per cent) than rural people (4.5 per cent) and also among those living in high (75 per cent) compared to low SES suburbs (25 per cent). Amalgam was more often used (89 per cent) than composite resin (10 per cent). The most frequently observed type of restoration was Class I (45 per cent) followed by Class II (39 per cent) and Class III (7 per cent). The prevalence of satisfactory restorations was 83.9 per cent. Failures were due to 'fractured restorations' (6.3 per cent), 'caries at the margin' and 'breakdown of restoration margin', both 4 per cent. Amongst adults, multiple-surface amalgam restorations failed more often than single-surface ones. It is concluded that the prevalence of restorations found was very low. There is a need to extend the provision of preventive and restorative oral health care by a more equitable distribution of oral health personnel and by making more finance available to rural and low-SES suburban areas.

Variation in periodontal referral by general dental practitioners

This study investigated the extent of and reasons for variation in the periodontal referral patterns of general dental practitioners in Northern Ireland. A questionnaire was circulated to all general dental practitioners in Northern Ireland. This questionnaire investigated the management of periodontal disease in the general dental service and referral for specialist periodontal advice and treatment. A usable return was made by 355 (68%) of those surveyed. The mean number of periodontal referrals by each respondent in the past year was 6.5 (SD 7.7), range 0 to 80. Backward stepwise logistic regression analysis indicated that independent predictors of high referral rate were practice location close to the referral centre (p<0.0001); dissatisfaction with ability to treat periodontal disease under the National Health Service (p=0.001); that previous refusals of referral had not dissuaded a dentist from continuing to offer referral (p=0.002); not offering root planing as a treatment (p=0.005); and perceived inadequate postgraduate education in periodontology (p=0.03). It is concluded that considerable variation exists between general dental practitioners working in Northern Ireland in relation to the referral of patients for specialist periodontal advice and treatment. It is further concluded that in many cases non-disease factors, such as the accessibility of the specialist service, have powerful effects on the decisions made by dentists and patients in relation to periodontal referral.

Survey results of reduced-fee and free-of-charge dental services by the membership of the Federation of Special Care Organizations in Dentistry

In 1996, a questionnaire was mailed to all members of the Federation of Special Care Organizations in Dentistry (FSCO) in an attempt to learn more about their professional practices. Questions focused primarily on the amount of free and reduced-fee dentistry that the membership provided to the public. The questionnaire asked respondents to identify their field of practice; estimate the amount of time, the number of patients, and the monetary value of the dentistry provided; as well as to classify the types of patients to whom they provided these dental services for free or at reduced fees. Each of the FSCO respondents reported providing an average of $14,820 in free dentistry in 1995. Not surprisingly, the respondents reported treating a significant number of special-needs patients. Members also reported spending 31.0% of their clinical time working at reduced fees and 7.4% of the time working for free. This questionnaire revealed that the Federation of Special Care member respondents are donating a significant amount of dentistry and treating a large segment of special-needs patients.

Consistency across panels of ratings of appropriateness of dental care treatment procedures

OBJECTIVE

To report on a study investigating the consistency across different consensus panels of ratings of appropriateness for dental procedures.

RESEARCH DESIGN

The study conducted four consensus panels to determine, under various conditions, the appropriateness of five options for patients: no treatment; filling; crown; root canal with a filling or crown; extraction. The patients were categorised according to age; regular versus irregular use of dental care; degree of caries; degree of pain; degree of periodontal disease.

PARTICIPANTS

The panellists were dentists enrolled in a continuing education programme on assessing the quality of dental care. The panellists were all individuals employed by various dental plans to evaluate the quality of care plans operating in California.

RESULTS

The results indicate that the method does distinguish the dimensions of appropriateness used by the panellists in making their decisions, and that it is possible to substantially increase consensus among a diverse group of dentists and across separate panels on some procedures. However, it also showed that the process is sensitive to varying panels and that different variables had different outcomes in the ratings from the various panels.

CONCLUSION

The consensus panel method holds some promise for determining the appropriateness of dental care. However the results of this study question whether it results in consistent ratings across different panels.

Dental caries treatment pattern in 14-15-year-old school pupils attending high caries schools in north & west Belfast and their ability to recognise untreated disease

The study examined the dental caries treatment profile of 186 14-15-year-old children in schools known previously to have a high overall caries experience, the schools being located in a high caries area of Northern Ireland. The children had a high mean number of decayed and untreated teeth. The majority of children who had untreated decay were unaware of this status and had a mean D value of 3.85. There was a significantly higher number of untreated carious teeth for children who had not attended a dentist within the past year when compared with those who had attended (mean values 4.08 and 2.54 respectively). While there were high levels of unmet needs overall it is concluded that children who had not attended the dentist for the past year had very high levels of untreated decay.

The incentive effects of malpractice liability rules on dental practice behavior

OBJECTIVES

The impact of malpractice liability rules on dental practice behavior was estimated using data from a 1992 nationwide survey of US general dentists. The study examined the premise that malpractice liability rules can affect quality of care and related resource allocation decisions by dentists, but that market features, such as relatively complete and "non-experience rated" malpractice insurance, are likely to weaken the incentive effects of malpractice liability.

METHODS

General practice dentists in the United States were selected randomly, and 3,048 dentists were studied by mail survey. Secondary data on county-level characteristics were used to measure market area factors. Quality-of-care measures were derived from the survey about self-reported practice policies and behavior and participation in continuing education. Legal measures were assembled from state statutes and appellate court decisions. Ordinary least squares was used to assess the relation between legal variables and dependent variables of quality of care, continuing education, and the rate of dental output.

RESULTS

Hypotheses about the effects of malpractice law on practice quality and participation in continuing education were not supported. The relation between pro-dentist law and output was supported. A number of legal provisions related to differences in practice behavior, but often in ways opposite to the expected direction.

CONCLUSIONS

The direct effects of specific malpractice liability rules on dentist practice behavior often failed to point in the direction predicted by theory and were economically insignificant. It is possible that relatively complete malpractice liability insurance, coupled with "noisy" liability rules, substantially dulls the deterrent effect of malpractice liability. Other forces, such as the dentist's past malpractice claims experience, were more significant in shaping dentist behavior.

Levels of restorative care under capitation

OBJECTIVES

1. To compare the prevalences of fissure sealants in similar groups of 14-15-year-old, regularly-attending patients treated under fee-for-service in 1989 and capitation in 1994. 2. To calculate the effect of including sealants in the restorative index on estimates of interventional treatment carried out on 14-15-year-old regularly attending patients treated by general dental practitioners in 1994.

DESIGN

A randomised epidemiological study.

SETTING

Secondary schools in the Wycombe, Doncaster and Hereford/Worcester areas.

METHOD

Random samples of 14-15-year-old, regularly attending patients treated by dentists practising under capitation in three contrasting areas of England were examined in 1994 for the presence of decayed, missing and filled teeth and fissure sealants. Restorative indices were calculated with and without the inclusion of sealants. The latter were compared with restorative indices calculated without the inclusion of sealants on regularly attending patients of the same age group when the dentists in the same three areas were working under fee-for-service in 1989.

RESULTS

The prevalence of fissure sealants increased between 1989 and 1994 from 16% to 30% in Wycombe, from 13% to 50% in Doncaster and from 25% to 47% in Hereford/Worcester. Without fissure sealants the restorative indices fell between 1989 and 1994 from a range of 76.5-94.4 to 63.3-87.1. When sealants were included in the restorative indices for 1994, they ranged from 79.5-92.9.

CONCLUSIONS

There were increases in the prevalences of fissure sealants between 1989-1994. When these sealants were included in the calculation of restorative indices for 1994, the level of restorative care provided by general dental practitioners remained relatively high since the introduction of capitation. Although there has been some increase in the level of untreated disease, if the restorative index is calculated without the inclusion of sealants then there is a risk of underestimating the treatment provided by general dental practitioners to control the carious process. Dentists appear to be redirecting their efforts into newer treatment/preventive items.

Orthodontists' views of justification for cost of orthognathic surgery

PURPOSE

This study evaluated whether orthodontists' treatment of patients was influenced by their perception of the justification for the cost of orthognathic surgery.

MATERIALS AND METHODS

A survey of 334 Canadian orthodontists was used to determine what factors influenced views of cost justification.

RESULTS

Approximately 80%, 49%, and 9% of orthodontists perceived cost of surgery to be justified for severely, moderately, and mildly compromised patients, respectively. Whether the compromise was functional or aesthetic did not particularly affect their views. Least experienced orthodontists were more likely than more experienced orthodontists to perceive cost of surgery as justified for patients with moderate functional compromise (P < .01). Most experienced orthodontists were more likely than less experienced orthodontists to perceive cost of surgery as unjustified for patients with moderate aesthetic compromise (P < .01). Orthodontists who did not believe cost of surgery to be justified for patients with mild or moderate compromise tended to recommend orthognathic surgery less frequently than camouflage orthodontics for borderline surgery patients (P < .05).

CONCLUSIONS

The findings suggest that costs may be contained by orthodontists rationing surgery on the basis of severity of facial skeletal malrelationship and perception of justification of cost. Less experienced orthodontists are less likely to contain costs for patients with moderate functional and aesthetic compromise. Most experienced orthodontists are less likely to contain costs for patients with severe functional compromise. Patient satisfaction may be affected by rationing, which affects the treatment approach and thus the outcome.

UK National Third Molar project: the initial report

The National Third Molar (NTM) project was set up to assess current clinical practice in the UK concerning the management of third molar teeth. Patients were recruited from both hospital and general dental practice. During the one month study period 9248 patients with 26,577 third molars were recruited. In this report we present the findings in the 8298 patients with 25,001 third molars who were referred to hospital for assessment. Over half of all patients referred for assessment had either no extractions or a single third molar extracted. Less than a quarter of all patients referred underwent removal of all four third molars. Twenty per cent of all third molars assessed were not extracted. Of all lower third molars listed for extraction, 9574 (78%) were associated with symptoms or disease. Pericoronitis was the commonest indication for extraction and was cited in 39.5% of all extractions. Almost 70% of third molar extractions were done under general anaesthesia while less than a quarter were performed under local anaesthesia alone.

A critical assessment of high-earning orthodontists in the General Dental Services of England and Wales (1990-1991)

Cases from the Dental Practice Board's 2 per cent random sample of completed cases which had been treated by orthodontic practitioners with high gross earnings, were compared to all the cases within the sample from other practitioners. They were assessed using the PAR index and IOTN. High earning orthodontists treated slightly more cases with lower objective need for treatment, but treated no more cases 'Unnecessarily' than other practitioners. They used more fixed appliances, and had marginally better levels of residual need for treatment at finish, although this was at least partially explained by lower levels at start. Generally, their standards were not substantially different to other practitioners. Appliance type had a marked effect on outcome, as did levels of malocclusion and need for treatment at start. Both groups of practitioners performed similarly (better) with dual arch fixed appliances: however, overall standards could only be described as mediocre. There is no justification to single out high earning orthodontists for special scrutiny. However, it may be beneficial if the system of remuneration in the General Dental Services could be modified to give more positive incentive to quality, rather than simply quantity of treatments.

Project Mouthguard: a survey of Illinois dentists' attitudes on mouthguards

A random sample survey of Illinois dentists was conducted to determine their knowledge and experience in providing mouthguards for individuals and athletic teams. This article offers information on their education and involvement in mouthguard programs.

Illinois Dental Anesthesia and Sedation Survey for 1996

Dentists in the state of Illinois who possess a permit to administer sedation or general anesthesia were surveyed. A 71% response rate was achieved. Of the respondents, 86% held permits for deep sedation/general anesthesia and 14% held permits for parenteral conscious sedation. By practice specialty, 84% were oral and maxillofacial surgeons, 11% were general dentists, 5% were periodontists, and fewer than 1% were dental anesthesiologists. Advanced Cardiac Life Support training was possessed by 85% of the respondents. The most common anesthesia team configuration (82%) was a single operator-anesthetist and two additional assistants. Only 4% reported use of a nurse anesthetist, and 2% used an additional MD or DDS anesthesiologist. The vast majority (97%) of the practitioners do not intubate in the office on a routine basis. Supplemental oxygen was used by 81% of the respondents whenever intravenous agents were used. A total of 151,335 anesthetics were administered during the year. One mortality occurred in a patient with an undisclosed pre-existing cardiac condition. Four other events were reported that required medical intervention or hospital evaluation; however, no permanent injuries were reported. Other practice characteristics were described.

A prospective study on the maintenance of implant prostheses in private practice

This study examined the adjustments, repairs, time, and costs required to maintain 69 implant prostheses in private prosthodontic practice for an average of 22 months after placement. For the removable prosthesis design, the most common adjustment was contouring the prosthesis and the most common repair was retentive component replacement. Screw tightening or fracture repair were the most frequently needed modifications for fixed implant prostheses. Each removable implant prosthesis averaged four times as many postplacement adjustments and almost twice as many repairs as did each fixed implant prosthesis, and the mean length of each maintenance appointment was also longer for removable prostheses. Mean repair costs were approximately 60% higher for the removable design.

The use by general dental practitioners of an oral pathology diagnostic service over a 20-year period: the Birmingham Dental Hospital experience

OBJECTIVE

To investigate the use of an oral pathology service by general dental practitioners over a 20-year period.

DESIGN

Retrospective analysis of the number of cases received for histological examination in 1975, 1984 and 1994.

SETTING

Birmingham Dental Hospital.

SUBJECTS AND METHODS

1101, 2395 and 3366 specimens were accessed respectively for the three years studied. Number and proportion of specimens received, number and proportion that were hard or soft tissue specimens and the information on the request form were recorded. A comparison was made between the provisional clinical and histological diagnoses.

RESULTS

Although the number of specimens accessed increased approximately 3-fold, the number of specimens accessed from general dental practitioners increased 5-fold. The variety of histological categories increased by over 50%, most being soft tissue specimens. The number of correct provisional diagnoses increased steadily but the percentage with inappropriate provisional diagnoses remained the same. Information on request forms steadily improved.

CONCLUSIONS

The increased number of specimens received from general dental practitioners over the 20-year period reflects an increased demand for an oral pathology diagnostic service. The referral pattern most likely indicates an increased awareness by general dental practitioners of the need to biopsy lesions arising within the oral cavity.

Radiographic criteria employed to diagnose and treat approximal caries by final-year dental students in Mexico City

A total of 407 final-year dental students in Mexico City were asked about the radiographic criteria they employed when assessing treatment needs for caries in a standardized patient case. 45.2% of participants would restore lesions confined to enamel; 60.7% believed that a lesion which had not passed the dentino-enamel junction would cavitate; and 65.4% said it would take on average 6 months or less for a lesion to progress from outer enamel to the dentino-enamel junction. Radiographic criteria appeared to reflect fears of rapid, inevitable progression of lesions. While local caries experiences had been reported to be high, there seems to be room for re-evaluating some clinical criteria employed to manage caries.

National survey of endodontists and selected patient samples: infectious diseases and attitudes toward infection control

A survey was conducted of 591 patients from endodontic practices located in six large municipalities in the United States. A comparison was made between the self-reported incidence of transmissible diseases from patients medical histories to national statistics for the incidence of hepatitis B, herpes, tuberculosis, and HIV/AIDS. A national survey of 422 endodontists was also conducted. This survey was used to determine the beliefs and attitudes of practicing endodontists toward infection control techniques and infectious diseases. Compared with previous surveys, a trend toward increasing use of the hepatitis B vaccine, gloves, and greater acceptance of medically compromised patients was found.

Bracket recycling--who does what?

At present there is debate concerning the practice of recycling orthodontic components. A survey of 300 members of the British Orthodontic Society showed that 47.5 per cent of respondents recycled metal brackets and that more specialist practitioners than consultants did so (p < 0.001). Only 7.2 per cent of the orthodontists who recycled brackets informed their patients that recycled brackets were used.

A survey of the opinions of orthodontic specialist trainees in the U.K

A questionnaire survey was carried out to ascertain a profile of orthodontic postgraduates in training in the United Kingdom during 1993. Information about the postgraduates, their programmes and their career plans was collected. Eighty-nine questionnaires were distributed to those enrolled in 13 of the training programmes in the U.K. at that time from which the response rate was 64 per cent. The results can be compared with a similar survey carried out in the United States of America in 1992 (Keith and Proffit, 1994).

Occlusal restorative decisions based on visual inspection--calibration and comparison of different methods

The purpose of this in vitro study was to calibrate occlusal restorative decision-making based on visual inspection (VI), and to compare it with visual inspection with magnifying (x1.25) lenses (VIM), and fibre-optic transillumination (VIF). Sixty extracted human third molars mounted in plaster were examined using VI by ten dentists three times during the calibration process. After wash-out periods, the teeth were re-examined by the same dentists using VI, VIM and VIF. The inter-examiner reproducibility for VI, expressed as Kappa (kappa) statistics (kappa +/- SD), was 0.46 +/- 0.10 before and 0.59 +/- 0.11 after the calibration process and remained at the same level after the wash-out period. Intra-examiner reproducibility was substantially higher for VI (kappa -0.68 +/- 0.15) before and after the wash-out period. There were no significant changes in restorative treatment decisions based on VIM and VIF when compared to VI. The reproducibility between the methods was good for VI vs. VIM (kappa = 0.64) and moderate for VI vs. VIF (kappa = 0.56). In contrast, the inter-examiner reproducibilities expressed as Kappa were considerably lower for VIM (kappa = 0.46 +/- 0.17) and VIF (K = 0.42 +/- 0.19). It was concluded that the inter-examiner reproducibility can be improved with a calibration process based on a simple feedback method and that inter-examiner variation, especially without calibration, may be as important a factor for restorative treatment decisions as the diagnostic method itself.

Reasons for placement and replacement of restorations of direct restorative materials by a selected group of practitioners in the United Kingdom

This article reports the findings of a study on reasons for the placement and replacement of direct restorations in general dental practice in the United Kingdom. Twenty-two selected practitioners recorded information pertaining to up to 250 consecutive direct restorations placed by themselves during a 6-week period. From data derived from 2,379 restorations, it was found that about 60% of restorative practice in the United Kingdom may be found to comprise the replacement of existing restorations. For restorations of amalgam and glass-ionomer cement, the principal reason for replacement was secondary caries. For restorations of resin composite, secondary caries and poor appearance accounted for equal proportions of failures. Apart from the need for more extensive surveys of the type reported, the data emphasize the need to monitor treatment trends in contemporary clinical practice.

Adoption of innovative caries-control services in dental practice: a survey of Washington State dentists

To assess the adoptability of the medical model for caries control, the authors surveyed general dentists about their use of four caries-control services among adult patients: salivary functioning tests, fluoride varnishes, chlorhexidine rinses, and pit-and-fissure sealants. Responses indicated that leaders in the dental community and those with a wider network of professional colleagues were likely to adopt new services more quickly than other dentists. Earlier adopters also had more correct information about these services than later or nonadopters. Overall, the knowledge base of the services studied in this survey was not uniform, making adoption of the medical model for caries control premature.

An investigation of dento-alveolar trauma and its treatment in an adolescent population. Part 2: Dentists' knowledge of management methods and their perceptions of barriers to providing care

AIM

To assess dentists' knowledge of and perceived barriers to treatment of dental injuries.

DESIGN

Cross-sectional postal questionnaire and personal interview.

SUBJECTS AND METHODS

Questionnaires from 153 GDPs and 53 CDOs were received giving details of emergency options on 17 imaginary dental injuries and perceived barriers to treatment of trauma. Structured interviews with 21 of the GDPs and 19 CDOs seeking knowledge on diagnosis and long-term follow-up and treatment took place. Age and gender of dentist, type of practice and postgraduate courses attended were noted.

MAIN OUTCOME MEASURES

Mean knowledge scores.

RESULTS

Of a maximum of 14 correct responses on emergency treatment of injured teeth the mean was 7.5. Only 19% knew for how long avulsed teeth should be splinted. Of a maximum of 37 correct responses on long-term follow-up of treatment the mean was 15.4. Only 10% would correctly treat acute abscess on a traumatised tooth. 82% of dentists thought dental trauma should be treated in the primary care service, but 86% of GDPs thought fees for this type of treatment were too low. 72% of CDOs thought the treatment occupied too much clinic time and was not the responsibility of the CDS.

CONCLUSIONS

Dentists in the primary care sector have insufficient knowledge to treat dental trauma.

Orthodontic residents' indications for use of the lateral TMJ tomogram and the posteroanterior cephalogram

The purpose of this study was to determine the selection criteria used by orthodontic residents for ordering a corrected lateral tomogram (LT) of the temporomandibular joint (TMJ) and a posteroanterior cephalogram (PAC) for the diagnosis of patients needing orthodontic care. The impact of the radiographs on their treatment plans was also assessed. We conducted a study of the 144 new patients assigned to eight orthodontic residents during a two-year period. The residents responded through questionnaires describing their rationale for ordering the radiographs. A LT was ordered for twenty-eight (19 percent) of the patients. The most common reasons cited for requesting the LTs were TMJ clicking (67 percent) and pain (33 percent). The residents also perceived a need to order the LT for medico-legal protection in 85 percent of these cases. The LT tended not to have an impact on treatment planning. A PAC was ordered thirty-eight times (26 percent). The most common reasons cited by residents for ordering a PAC included clinical findings of facial asymmetry (41 percent) and maxillary airway anatomy (24 percent). Medico-legal protection was a perceived need in only 12 percent of the cases. While the PAC had no impact on treatment planning for 56 percent of the cases, they did define the transverse problems as dental or skeletal for 38 percent of the cases. Six patient traits were statistically associated with PAC requests: difficulty chewing, abnormal TMJ, TMJ clicking, facial asymmetry. crossbite, and midline discrepancy. The teaching of appropriate selection criteria for ordering these radiographs needs to be emphasized early in a resident's training.

Factors influencing the appropriateness of restorative dental treatment: an epidemiologic perspective

OBJECTIVES

An epidemiology analysis was performed to identify patient and dentist factors influencing over- and undertreatment of restorative services in a sample of insured adults.

METHODS

At baseline, 681 Washington State employees and their spouses, aged 20 to 34 years and residing in the Olympia or Pullman areas, were interviewed by telephone. Oral assessments were conducted to measure personal characteristics, oral disease, and restoration quality. Adults were followed for two years to measure use of restorative services from dental insurance claims. Each adult's baseline and claims data were linked with provider and practice variables collected from the dentist who provided treatment.

RESULTS

For overtreatment, 39 percent of adults received one or more replacement restorations in nondecayed teeth with satisfactory fillings at baseline, while 18 percent of adults had one or more restorations placed in teeth with no decay and fillings. An adult's probability of overtreatment was higher if the adult had more fillings at baseline, or if an adult's dentist was younger, had a busy practice, advertised, charged higher fees, had less continuing education, or had a solo practice. For undertreatment, about 16 percent of adults either received no replacement restorations in teeth with unsatisfactory fillings at baseline, or had decayed teeth at baseline that were not filled or crowned. An adult's probability of undertreatment was higher if an adult had less decayed or more missing surfaces at baseline, or if an adult's dentist believed in sharing information with patients, had a busy practice, or reported not placing fillings when radiographic evidence of new caries was present.

CONCLUSIONS

A minority of adults aged 20 to 34 experienced potential over- or undertreatment of restorative services, which are influenced by both patient and dentist factors.

General dental practitioners' opinions on orthodontics in primary and secondary care

A survey of 232 general dental practitioners was undertaken by the purchasing authorities in Hereford and Worcester, England, in 1993, to establish local practitioners' views on primary and secondary care orthodontics. The response rate was 90.1%. The dentists overestimated their orthodontic case-load: 66.6% of contract holders submitted no claims for upper removable appliances (URA) treatment, but 70.8% claimed they undertook removable appliance therapy. Dentists believed orthodontics should be a feature of the General Dental Services (GDS) but did not seem inclined to commit themselves to providing it. A majority of GDPs (54.9%) felt orthodontics was uneconomic under the GDS. There was support for the treatment planning role of hospitals, but although this was available locally it did not appear to have stimulated primary care provision. Consultant outreach clinics were not generally supported but there was a desire for more opportunities for hospital clinical attachments in orthodontics. The implications for the policies of National Health Service (NHS) purchasers are considered: purchasing health authorities need to carry out systematic assessment of the views of their general dental practitioners and take account of their desired patterns of specialist provision. Policies encouraging the shift of orthodontics into primary care are called into question by this study. If demand for orthodontics is to be met, policy should concentrate on the development of hospital services and specialist practitioners.

Variation in the use of crowns and their alternatives

The use of crowns and their alternatives for the restoration of compromised posterior teeth is of interest to educators, purchasers, and patients. Considerable curricular time is devoted to learning these techniques, substantial amounts of money are spent on these procedures, and differences in the outcomes of these treatments may have consequences for tooth survival. To begin to understand more about the actual use of these procedures, the provision rates of these services in a sample of U.S. dental practices were examined. This study reports on the extent to which utilization patterns and subsequent costs of crowns and their alternatives were associated with certain patient and practice characteristics. Insurance claims for dental services submitted by general dental practices through an electronic claims clearinghouse were used. Crown ratios (crowns/crowns plus alternatives) were calculated for dental practices to evaluate relationships with available explanatory variables. Findings indicated that older patients were significantly more likely to receive crowns than those in younger groups, resulting in as much as a 33 percent increase in the mean per tooth cost of treatment in the oldest group. Regional variation existed in the provision of crowns and resulted in up to a 31 percent difference in the mean per tooth treatment cost between regions. Crown ratios exhibited variation beyond that accounted for by patient and practice factors, thus raising questions about the consistency of treatment recommendations among dentists. These findings support the need to examine further the consistency of crown use among general dentists and to modify current approaches for teaching treatment planning in predoctoral restorative curricula.

Working patterns of male and female dentists in South Africa

Studies in England, USA and Australia, have shown that the working hours of female dentists do not differ significantly from the working hours of their male counterparts, until they have children. The purpose of this study was to establish whether the same phenomenon exists in South Africa and to compare working patterns of South African male and female dentists regarding nature of practice/employment, location of practice, work satisfaction and breadwinner status. Questionnaires were sent to 285 female dentists, selected by their first name in the SAMDC register. An equal number of questionnaires were sent to male dentists, selected according to the proportional random sampling technique. The total response achieved was 35.8 per cent. The female dentists' working hours showed a distinct drop as soon as they started a family (from 86 per cent, practising more than 35 hours per week, to 34 per cent) while the male dentists' hours remained unchanged (90 per cent). The fact that so many more male dentists (81 per cent) than female dentists (19.6 per cent) are primary breadwinners, explains why such a high percentage of female dentists can afford to work part-time. The majority of both male (89.7 per cent) and female (70 per cent) dentists are in private practice. However, a considerably larger percentage of females work for a salary in State clinics and at Universities. This study shows that gender, breadwinner status and the presence and age of children have a marked influence on the working patterns of South African dentists.

Lower third molar treatment planning ability of general dental practitioners and oral maxillofacial surgeons using receiver operating characteristics methodology

A comparison of lower third molar treatment planning ability of six oral and maxillofacial surgeons (three consultants, two senior registrars and one senior house officer) and 27 general dental practitioners was carried out using Receiver Operating Characteristics (ROC) methodology. Each clinician was presented with the same series of 50 case histories and asked to indicate, using a rating scale, how certain they were that each lower third molar required removal. These data, together with NIH gold standard treatment decisions for each third molar, were then used to construct ROC curves for each clinician and, using combined data, to produce ROC curves for the groups of hospital specialists and general dental practitioners. These curves were then compared statistically. There were significant differences between the best and worst practitioners, both in the hospital service and within general dental practice. When combined data were examined, however, there was no statistical difference in the treatment planning ability of hospital specialists and general dental practitioners. These findings indicate that lower third molar treatment planning ability is more dependent upon individual factors than specialist training. Further, the data presented here suggest that general dental practitioners are as capable of treatment planning for lower third molars as the specialists to whom they refer.

Provision of free and discounted dental services to selected populations: a survey of attitudes and practices of dentists attending the 1996 Dallas Midwinter Meeting

An attitudes and practices survey of dentists attending the Dallas Midwinter Meeting in January 1996 in Dallas was conducted as a collaborative effort between the Dallas County Dental Society and the Baylor College of Dentistry. The survey was developed to help determine participating dentists' attitudes and practices in the area of provision of dental services on a discounted or free basis to disadvantaged patient groups. A total of 225 dentists responded to the survey. Of these surveyed dentists, 213 (94.6%) were in private practice and 199 (88.4%) described themselves as general dentists. A considerable amount of charitable dental services, discounted and free, was reported to be provided by the group of respondent dentists. A total of 152 (67.6%) of the dentists surveyed reported providing discounted or free care to elderly patients with low income, 125 (55.6%) provided such care to low-income patients without age restriction, and 137 (60.9%) cared for patients of record with temporary financial hardship. In other patient categories, 79 (35.1%) of the dentists provided free/discounted services to handicapped persons and 47 (20.9%) provided care to homebound patients. These findings concerning charitable practices by dentists were similar to those found in a comparable survey conducted by the American Dental Association in 1994. Dentists were fairly evenly split as to their preference where to volunteer services. Of the total respondents, 84 (40.6%) preferred providing services in their own office and 91 (44.0%) preferred to do so at a community health clinic that hosted volunteers.

Antimicrobial management of third molars: survey results for military dentists

In a survey of military dentists to examine use of antimicrobial agents in the management of third molars, questions addressed use of antibiotics and an antimicrobial rinse in treating pericoronitis and third molar extractions. Results were compared with information from a literature review. According to the survey, a majority of clinicians use antibiotics to treat pericoronitis but not surgical extraction of asymptomatic dental impactions. About 60 percent of respondents use a preoperative rinse with chlorhexidine in treating the third molar conditions discussed. A postoperative rinse with chlorhexidine was used less frequently. Half the respondents listed medicolegal factors in their decisions.

Perceptions of orthodontic treatment need: Receiver Operating Characteristic analysis

This study aimed to investigate the variations in dentists' perception of need for orthodontic treatment. Sixteen dentists viewed forty clinical vignettes and recorded their decisions according to the certainty with which they would offer treatment for each case. Receiver Operating Characteristic (ROC) analysis was performed on this data, using the Index of Orthodontic Treatment Need (IOTN) as the "gold standard'. The data suggest that dentists treatment decisions do not concur with current guidelines in use in the UK.

The referral practice of general medical practitioners to the surgical specialties: implications for the future

With increasing numbers of general medical practitioners (GMPs) becoming purchasers of health care, providers of surgical services need to understand factors influencing GMP referrals. Using an anonymous postal questionnaire, criteria used by 400 randomly selected general medical practitioners to make referral decisions were assessed. Issues regarding the importance of waiting lists, cost, distance and communication were assessed, along with previous training and fundholding status. The findings of this study reveal that waiting list times for consultation and treatment, along with communication, are the most important criteria influencing referral. Cost, travel and literature from each specialty were the least important factors. General medical practitioners are shown, in the majority, to remain unaware of the range of conditions managed by oral and maxillofacial surgeons. A series of strategies are outlined, which might be used to broaden the referral base for maxillofacial surgery. The need for active education of practitioners is emphasised and the possible effects of regionalisation of the service is discussed.

Use of in-office fluorides in the Greater Houston area

The purpose of this study was to determine the types of fluorides and techniques used for the application of in-office fluorides in the Houston area. A telephone survey was conducted using a stratified random sample of 262 dentists. Approximately 39% of the offices contacted chose to respond to the survey. Only one of the 101 dental offices responding was using an ADA approved professional fluoride product and technique: 1.23% APF for 4 minutes. While 41.6% or 42 of the respondents were using 1.23% APF, they were administering the fluoride for 2 minutes or less with the majority (38 out of 42) administering for only 1 minute. The second most number of respondents (35.6%) reported using a dual rinse type product consisting of 0.31% APF and 1.64% SnF2. Of the 101 respondents, 12.8% reported the use of sodium fluoride gels and rinses. Of these 13 respondents, 9 were using 2.0% NaF but for less than the recommended 4 minute application time. The other 4 were using 2.0% rinse which is more appropriate as a weekly-use rinse. The remaining respondents (9.8%) reported the use of a stannous fluoride containing less fluoride than the approved 8.0%. Of these 10 respondents, 3 were using 0.63% SnF2 and 7 were using 0.4% SnF2. One office reported the use of a non-fluoride containing mouthrinse used as an in-office fluoride treatment. This response is not included in the data as it does not qualify as a type of fluoride product.

Survey of reasons for extraction of permanent teeth in Italy

The purpose of the study is to collect information on the reasons given by dentists, randomly selected from the Italian Dental and Maxillo-Facial Association's, for extracting permanent teeth in Italy. From the 164 dentists responding, 1056 teeth in 839 patients were extracted during two weeks of working activity. More than two-thirds of the teeth were extracted for dental caries (34.4%) and periodontal disease (33.1%). The mean number of teeth extracted per patient showed a significant increasing trend with increasing age, being 1.09 in those from 16 to 39 yr, 1.25 in the 40-59-yr-old group, to 1.54 in those over 59 yr of age (F = 21.44; P < 0.0001). The third molar was the most frequently extracted tooth and 41.3% were removed due to impaction reasons, in particular from the mandible. The first and second molars and the premolars were extracted most often because of caries; more than half of the incisors and the canines were extracted for periodontal reasons; the majority of the teeth removed for prosthetic reasons, 57.1%, were incisors and canines, especially in the mandible; of the teeth extracted for orthodontic reasons, 47.4% were first and second premolars. The prevalence of subjects with at least one tooth extracted for dental caries and for orthodontic reasons were respectively significantly higher in the irregular than the regular attenders (chi-square = 46.55; P < 0.0001), and in the regular than the irregular dental attenders (chi-square = 63.12; P < 0.0001). Dental practitioners should promote targeted initiatives for prevention and treatment of diseases in order to reduce in particular the incidence of tooth extraction because of caries and periodontal disease.

Current trends in endodontic treatment: report of a national survey

The authors surveyed 360 general dentists and 291 endodontists to obtain information on routine, nonemergency endodontic treatments adapted to clinical practice. Frequent practices and recent advances in treatment modalities-including instrumentation, obturation, intracanal preparations, medications and restorations-are highlighted.

The pattern of usage of dentine pins

A survey of 1394 dentine pin placements, completed by 37 selected practitioners over a period of three months provides information relevant to the teaching of pin techniques and to future research on alternatives to the use of dentine pins in the restoration of severely compromised teeth. In this survey, most direct pin-retained restorations were found to be placed in the mandibular permanent molar teeth of patients 20-39 years of age. Such restorations were frequently found to include only one pin, which in about 50% of cases was bent or shortened. Overall, difficulties with pins occurred during one in twenty pin placements. The long-term consequences of the use of pins remains to be investigated.