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Biomedical subjects

D A Shugars

Publications and source records attributed to D A Shugars.

At least 37 records · Page 2Linked to original sources

Survival rates of teeth adjacent to treated and untreated posterior bounded edentulous spaces.

It is widely assumed that if posterior bounded edentulous spaces, or BESs, are not treated, the adjacent teeth ultimately will be lost. The authors examined this assumption by determining the survival of teeth adjoining 569 treated and untreated BESs. In the short term, the assumption was not supported. The great majority of untreated BESs did not result in loss of an adjacent tooth. Treatment with a removable partial denture did not increase the likelihood of adjacent tooth survival, while treatment with a fixed partial denture did result in modestly improved survival of adjacent teeth.

Adult↗

What do we know about how dentists make caries-related treatment decisions?

A conceptual model of dentists' treatment decision-making is discussed. The model suggests that dentists do not use a hypothetico-deductive process for the diagnosis of caries. Rather, caries is identified through a process of pattern recognition that in most instances is inextricably linked to intervention decisions. Individual dentists have inventories of caries scripts that, when matched by a particular clinical presentation, lead to decisions to treat. The scripts comprise salient factors that are dependent on individual dentist's characteristics and biases, and thus vary substantially across dentists. The scripts tend to be complex, highly visual, and difficult to describe. All of these characteristics suggest that efforts to improve dentists' caries-related treatment decisions should acknowledge this knowledge structure and be designed to change the salient factors or interpretations of salient factors within the context of the caries script.

Attitude of Health Personnel↗

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.

Adolescent↗

A case for diagnoses.

It is common practice to record treatment rendered, but not the diagnostic basis for these treatment decisions. This practice appears to undervalue diagnosis, as well as hamper feedback to practitioners and the profession about the effectiveness of treatments relative to specific diagnoses. It also leaves dentists open to liability for litigation and impedes research. A case is made that dentistry should follow medicine in exploring the use of standardized computer-codable diagnoses as part of record keeping. A two-step process is suggested to promote initial acceptance.

Decision Making↗

A conceptual framework for understanding outcomes of oral implant therapy.

The use of implants has expanded so rapidly that its effectiveness for many clinical situations has not been firmly established. Dentists are responsible for making appropriate therapeutic recommendations for the management of partial and complete edentulism. These decisions require an understanding of the consequences or outcome of treatment approaches. Outcome measures to evaluate the benefits of alternative therapies include longevity as well as physiologic, psychologic, and economic impacts. Future research should include outcome measures beyond implant prosthesis survival to more fully assess the practical impact of dental implants on the patient's oral health and to determine the most cost-effective approaches for managing completely and partially edentulous patients.

Alveolar Bone Loss↗

Developing a measure of patient perceptions of short-term outcomes of third molar surgery.

PURPOSE: The purpose of the study was to develop an instrument to measure patients' perceptions of their experiences after the removal of third molar teeth. METHODS: Nineteen patients (ages 18 to 25 years) who underwent surgical removal of four third molars after local treatment for mild symptoms of pericoronitis completed a newly developed 14-item instrument each evening for the 14-day period after surgery. A focus group was used to further examine the experiences of a subset of subjects. RESULTS: On the first day postsurgery, patients reported a median level of 81 on the 0 to 100 scale of "limitation of daily activity because of pain" (100 = total interference). This dropped to 21 by day 5, and all but two patients returned completely to normal activities by day 8. During the first 3 days, the median level of "average pain" ranged from 51 to 33 (100 = pain as bad as could be), and all but two patient were pain-free by day 10. Bad taste/breath persisted for between 2 to 4 days; food impaction was experienced by nearly all patients from days 3 through 14. Swelling was encountered by 10 of the patients for the first 2 days and was reported by only one patient after day 5. CONCLUSIONS: This study demonstrated that patients' perceptions of their experiences could be collected using a self-administered instrument, and it confirmed the changes in postsurgical morbidity that occur in healthy, young adults. This instrument and these data will be valuable to those striving to make informed decisions regarding third molar surgery.

Activities of Daily Living↗

Using crowns to prevent tooth fracture.

Placing crowns to prevent tooth fracture is thought to be a common but infrequently documented treatment procedure. Two studies are described that provide information about dentists' use of crowns to prevent tooth fracture. North Carolina general dentists indicated that 44% of the crowns they placed were for the principal reason of fracture prevention. However, when groups of dentists examined the same patients, there was little agreement about which teeth should be crowned due to risk of fracture. These results suggest that the placing of crowns to prevent fracture merits a careful determination of effectiveness and appropriateness.

Age Factors↗

Case-control study of non-carious cervical lesions.

An exploratory case-control study of non-carious cervical lesions was undertaken to examine the effects of a variety of risk factors. Candidate exposure variables were related to erosion, abrasion, and tooth flexure, the three principal putative causal mechanisms for cervical lesions. Because previous studies have tended to focus on specific causal mechanisms, evidence for a multifactorial etiology is inconclusive. Data describing exposure factors were obtained through clinical examination, dietary and behavioral questionnaires, and analysis of study casts from 264 subjects (137 cases, 127 control). Salivary data were also obtained for a subset of these subjects. Patient and tooth-level logistic regression models were constructed for the full subject group, and the subset with salivary data. For the two patient-level models, only exposures related to brushing entered. For tooth-level models, multiple exposures representing all three causal mechanisms were included in both models. The results suggest that non-carious cervical lesions do have a multifactorial etiology, and that multiple causal mechanisms may operate in the initiation and progression of individual lesions.

Adult↗

Cost implications of differences in dentists' restorative treatment decisions.

OBJECTIVES: This study sought to determine the effects of variation in both dentists' decisions to treat and choice of treatment on the costs of care. METHODS: Each of 37 patients was examined individually by several practicing dentists (between 3-22, mean = 6.2). For each dentist's recommended treatment for each patient, the total cost of restorative treatment was calculated first using the least expensive treatment possible for each tooth indicated as needing treatment, and second using the costs of specific treatment selected by each dentist RESULTS: Considerable variation was found among dentists in each patients cost of treatment using both methods. The mean of the median cost per patient of the specific treatment selected was three times larger than the cost per patient of basic treatment. Few dentists were found to consistently recommend higher or lower cost treatment plans. CONCLUSIONS: These findings suggest that inconsistencies in both dentists' decisions to intervene and dentists' selection of treatment can have a profound effect on cost. Further, focusing utilization review on "outlier dentists" is likely to be much less productive in containing costs and improving quality than comprehensive attempts to improve consistency across the profession.

Composite Resins↗

A health plan report card for dentistry.

Employers are demanding information about the performance of the health care plans they purchase for their employees. As a result, "report cards" are now beginning to appear that provide standardized, population-based comparison data for managed medical care plans' quality of care, access and member satisfaction, utilization, and financial status. Although report cards for dental care plans have not yet been developed, it is likely that purchasers will soon expect such performance information. A prototype report card for dental managed care plans is proposed in an effort to facilitate the development of a consensus standard for dentistry. The thirty-eight measures proposed for the report card are designed to be obtainable with a realistic level of additional effort in most dental practices. They were selected to provide data on questions of importance to purchasers and to assess processes and outcomes important because there is strong evidence for their effectiveness. The rationale for the measures is discussed, as are the steps required to develop more sophisticated measures. While the responsibility for the procurement of the information needed for dental report cards will die initially with administrators of dental care plans, it is likely in the near future that individual practitioners will be expected to supply this information to both individual patients and potential contractors.

Administrative Personnel↗

Teaching an integrated approach to health care: lessons from five schools.

Medical education has excelled in bringing a sound biomedical base to the practice of medicine; however, there is now growing interest in helping students and residents learn an integrated approach to health care that addresses the complex interaction of many factors influencing health and illness. The authors' purpose was to learn about how some medical schools teach students a more integrated approach to health care. They used a qualitative, multiple-case-study design and collected data through document review and interviews with faculty, administrators, students, and residents at five U.S. and Canadian medical schools, chosen for their reputed excellence in addressing an integrated approach to care. Visits to the schools were made in the spring of 1993. Data analysis focussed on the institutional factors associated with teaching such an approach and the ways in which the schools help students and residents learn about this approach. The interviewees described the strong presence of an institutional mission or philosophy that is unique to each school but that generally has a service-oriented, patient-centered perspective. They reported that the primary means for learning about an integrated approach was the attention, woven into the curriculum, to four relationships; physician-patient, physician-community, physician-other practitioners, and faculty-student. A broad-based shared mission or philosophy was important in focusing attention on the integration of biomedical and non-biomedical concerns and promoting a perspective that focuses outward toward the community and its people. The pervasive attention to the four relationships suggests that such attention is intimately related to each school's underlying mission or philosophy.(ABSTRACT TRUNCATED AT 250 WORDS)

Administrative Personnel↗

Variation in dentists' clinical decisions.

OBJECTIVES: The first comprehensive review of the recent literature regarding variation in dentists' clinical treatment decisions is presented. METHODS: Variation among dentists in the clinical decisions they make as well as the methods used for assessing this variation are examined at three levels of aggregation of clinical decisions: the dental practice (or dentist), the patient, and the individual tooth. RESULTS: The extent to which differences in dentists' clinical decisions have been examined is limited. Studies are particularly sparse at the level of the dental practice, where the aggregate of dentists' treatment decisions is reflected. Further, the methods and measures used to assess variation tend to be different across studies, making quantification of variation difficult. Nevertheless, the available information reflects substantial variation in measures such as rates of provision of specific procedures; cost and numbers of procedures recommended for specific patients; and diagnoses, intervention decisions, and treatment selections for individual teeth. CONCLUSIONS: Even when differences in patients are controlled, variation in dentists' clinical decisions is ubiquitous. While its consequences remain undetermined, the variation in basic clinical decisions such as caries diagnosis signals the need to consider the extent to which the appropriateness of care is affected.

Decision Making↗

Does the cycle of rerestoration lead to larger restorations?

The common practice of rerestoring teeth has been termed the "cycle of rerestoration." Some researchers and clinicians have speculated that this cycle results in teeth receiving progressively larger restorations. In this study involving 1,337 decisions to replace existing restorations in posterior teeth, the authors noted that 70 percent of all recommendations resulted in an increased number of restored surfaces. This observed increase in restoration size raises questions about the effects of the rerestoration cycle on the health of a tooth and suggests that practitioners should attempt to avoid premature rerestoration since it could hasten the cycle.

Adult↗

Public attitudes toward dentists: a U.S. household survey.

This article reports on research that assessed public attitudes toward dentists and the dental profession and compared them to dentists' own attitudes about their roles. Enhanced knowledge of patients' perceptions can help practicing dentists gain a better understanding of public perceptions of themselves and of dentistry as a profession, as well as enhance their relationships with patients.

Adult↗

Preliminary estimates of the incidence and consequences of tooth fracture.

The authors studied all tooth fractures identified within a two-week period among adult enrollees in a dental health maintenance organization to determine the incidence and severity of this condition. They found complete fracture rates of 5.0 and 4.4 per 100 adults per year for all teeth and for posterior teeth, respectively, with 15 percent of fractures resulting in pulpal involvement or extraction. These estimates, the first to be reported, provide information that is potentially useful to patients and dentists making decisions about treatment intended to prevent tooth fracture.

Adult↗

General dentists' patterns of restoring endodontically treated teeth.

The manner in which endodontically treated teeth are restored influences tooth longevity and the cost of treatment. This article describes a study of how surveyed general dentists restored endodontically treated teeth and whether their methods were consistent with those suggested in the literature. Some patterns of restoration did reflect the literature's recommendations, but overall the findings call into question some of the ways in which post-endodontic restorative care is carried out.

Composite Resins↗