Oral cancer: the role of the dentist in prevention and early detection.
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Biomedical subjects
Publications and source records attributed to W M Carpenter.
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The purpose of this article is to assist the clinician in establishing a clinical approach to the diagnosis of focal, flat pigmentations of the oral mucosa. These pigmentations include lesions that may be blue, purple, red, black, or brown. The etiopathogenesis may be variable and the pigment may originate from an exogenous (extrinsic) or endogenous (intrinsic) source. Exogenous pigmentations are of a traumatic or iatrogenic origin. Intrinsic pigmentations are either vascular or melanocytic. Clinical approaches include a thorough history and physical exam coupled with diascopy (blanchability), radiographs, and tissue examination (biopsies). An algorithm is presented to clarify the diagnostic approach. The diagnosis may vary from pathologic entities that require no treatment to others that may involve malignancies and their associated management. It is therefore extremely important that these lesions are identified and properly managed in an expeditious manner.
To properly assess a patient, a variety of questions are necessary to evaluate signs and symptoms of medical problems and to find out about diagnosed medical problems and specific medical treatments, including the use of drugs or medications. All of these factors can have a bearing on dental management. Because of the diversity of the population, a variety of languages are spoken in California and the United States. So that dentists can communicate with those diverse groups, a health history form developed at the University of the Pacific School of Dentistry has been translated into 10 languages. The translated forms and the corresponding English form are presented along with an explanation and rationale for their use.
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This article describes two approaches to the classification of oral mucosal lesions. One is based on the etiopathogenesis of the lesion and the second on the clinical appearance. These two approaches are compared and contrasted, and their integration is described. Combining these two classification schemas allows an excellent understanding of the various lesions so than an expeditious and correct diagnosis can result. Appropriate management and treatment can then follow.
There are few guidelines available for dental school faculty and administrators in the management of hepatitis B e-antigen positive (HBeAg+) dental school applicants. It is apparent that this serostatus is unique and requires a different approach from that used for applicants with other infectious diseases, such as the human immunodeficiency virus (HIV). The issue is examined from a number of perspectives, including the science, policy, legal, and ethical considerations confronted in establishing a policy for the HBeAg+ dental school applicant.
BACKGROUND: Dentists' competence and comfort level in detecting oral cancer may be strongly influenced by their dental school training. The purpose of this study was to compare the demonstrated knowledge of oral cancer topics among students receiving lectures and those learning the material through self-instruction at two dental schools. METHODS: Students at School 1 received 17 hours of lectures on various topics in oral cancer, including epidemiology, etiologic factors, histopathology, clinical appearance, clinical management and treatment, and oral complications. Lecture topics reflected material in the assigned text. Students at School 2 received only an introductory lecture, followed by a ten-week self-paced course using the same text used in School 1. At the end of the courses, the students at the two schools received identical 50-item final examinations. RESULTS: The students who had received the lectures and assigned readings scored significantly higher than did those assigned self-instruction alone (mean score of 91.2% vs 81.3%; p < 0.0001). This difference remained after statistical adjustment for entering grade-point average and Dental Aptitude Test score. CONCLUSIONS: Self-study of assigned readings may result in lower levels of knowledge of oral cancer topics than more traditional lecture-based teaching. The impact of this difference on clinical performance has not yet been demonstrated.
Dental health care professionals continue to suffer exposure incidents from instruments contaminated with blood and/or body fluids from patients. Each of these cases requires that a rigid protocol be followed for their evaluation. New information regarding the risk factors for HIV-seroconversion following an exposure incident have been identified. Recent data has demonstrated that a 79 percent reduction in disease transmission may be possible with a new combination drug therapy. The anti-retroviral drugs included in this new regimen are now standard in the management of occupational exposure to HIV. Several factors set dentistry apart from other health care occupations, and these differences appear to have an effect on the risks associated with occupational exposures. This article explores these risk factors and the new recommendations for postexposure care.
Over-the-counter products can be useful and effective in alleviating the pain from ulcerations of the oral mucosa. This article reviews over-the-counter medications that are available to treat ulcerative lesions. Among the categories included are covering agents, local anesthetics, and mouthrinses.
A workshop to discuss primary oral melanomas was convened at the annual Western Society of Teachers of Oral Pathology meeting in Bannf, Alberta, Canada. Fifty oral melanomas, identified from the files of the participants, were reviewed in order to better understand the clinical features, histologic spectrum, and natural history of these perplexing lesions. Results confirmed that oral melanomas occur in adults almost three times more frequently in men than women and have a decided predilection for the palate and gingiva. Some lesions exhibit a clinically detectable and prolonged in situ growth phase, whereas others seem to lack this property and exhibit only or predominantly invasive characteristics. Recurrences, metastases, and death from tumor were characteristic of the follow-up of a limited number of patients. Until definitive prospective data are collected that elucidate natural history, oral mucosal melanomas should be tracked separately from cutaneous lesions. All oral pigmented lesions that are not clinically diagnostic should be biopsied. Lesions with equivocal histopathologic features might be referred to as "atypical melanocytic proliferation" and should be excised. Recognition of lesions in an early in situ phase and aggressive treatment should have a favorable effect on prognosis. To enhance future or prospective study of these rare neoplasms, guidelines for reporting oral melanomas are suggested.
OBJECTIVES: To identify risk factors associated with chapped lips in soldiers during prolonged exposure to a hot, dry environment. METHODS: We examined 1,053 of 2,500 soldiers (42%) participating in a desert training exercise at Fort Irwin, California, in September 1983. We measured the prevalence of chapped lips during the third week of a 4-week training period. Our independent variables (complexion, sex, lip protectant use, age, and the prevalence of recurrent herpes labialis) were obtained by observation and interview. RESULTS: We found severe chapping in 150 (10%) and moderate chapping in 247 (23.5%) of the soldiers. Stepwise ordinal logistic regression was used to identify risk factors associated with chapped lips and to determine the prevalence odds ratios (OR). Risk factors with statistically significant associations with chapped lips were the presence of recurrent herpes labialis (OR = 2.88), very fair complexion (OR = 3.23), and fair complexion (OR = 1.58). CONCLUSIONS: Moderate to severe chapping occurred in approximately one-third of the soldiers. Lip protectants appeared to be relatively ineffective in the prevention and treatment of chapped lips but were associated with a lower prevalence of recurrent herpes labialis.
With the advent of medical waste and OSHA infection control regulations, many practitioners are unsure about the legal, proper handling of extracted teeth. This article outlines the options available for the disposal of extracted teeth and explains the role each regulatory agency plays in the process.
Ten HIV-infected patients who had bilateral hairy leukoplakia on the tongue were treated with topical podophyllum resin 25% solution. Only one side of the bilateral lesion was treated and the other side served as the control and was not treated. The lesions on both the treatment and control sides were evaluated at day 2, 7, and 30 by an investigator who had not been involved in the initial treatment and had no knowledge of which side had been treated. Therefore the treatment side is compared with the control side in a single-subject design, single-blind control setting. The lesions were judged by the degree of resolution and assigned a number of 0 to 4 with 4 indicating the highest degree of resolution and 0 indicating no resolution or worsening of the condition. The results were analyzed by Student's t test. Significant resolution of hairy leukoplakia was noted on the treatment side compared with the control side at the 2-, 7-, and 30-day levels; the 2-day results were the most significant. Furthermore, the patients reported minimal side effects, which included burning sensation, bad or altered taste, and pain, that were of mild intensity and short duration. The side effects were reported to occur immediately after the topical application. Patient tolerance and acceptance were found to be very favorable. No systemic side effect was reported. We conclude that single topical application of podophyllum resin 25% solution is efficacious in producing significant short-term resolution of HIV-related oral hairy leukoplakia. We also conclude that it is a safe topical regimen with minimal side effects.
A survey was performed on 1,062 of 2,500 (42%) Army personnel participating in a desert training exercise at Fort Irwin, California, in September 1983. The prevalence of recurrent herpes labialis (RHL) and chapped lips was observed during the third week of a four-week training period. Complexion, sex, lip protectant use, age, and time spent outdoors were obtained by observation and interview. Recurrent herpes labialis was found in 46 subjects (4%). Stratified analysis and stepwise logistic regression were used to identify risk factors associated with RHL and to determine the prevalence odds ratios (POR). Risk factors with statistically significant associations with RHL were lip protectant use (POR = 0.19), chapped lips (POR = 2.87), being female (POR = 5.00), and light complexion (POR = 2.48). These findings strongly support the use of lip protectants during prolonged exposure to hot, dry climates as a prophylaxis against recurrent herpes labialis. Additional studies should focus on excitatory factors of RHL; and clinical trials of the efficacy of the lip protectants to protect against RHL and chapped lips should be undertaken.
Adenomatoid hyperplasia of minor salivary glands is an uncommon clinicopathologic entity. It comprises clinical swelling resembling a neoplasm with a histologic picture of aggregates of normal-appearing salivary gland tissue in excess of that anticipated for the anatomic site. The significance of this lesion is derived from its clinical resemblance to a neoplasm of salivary gland origin. This study adds 40 new cases to the literature and analyzes their clinical and histologic features. Most of the lesions were located on the hard and soft palates. The exact nature of the minor salivary gland hyperplasia is not clear. Some of the cases may represent a hamartoma or a reactive hyperplasia, but in most cases the nature of the hyperplasia is idiopathic.
Lingual mandibular salivary gland defects in the posterior part of the mandible are not uncommon. Analogous defects in the anterior region, however, are rare, and the four new cases presented in this report bring the total number of reported cases up to 24. The purpose of the present study was to review and analyze the clinical, radiographic, and histologic features of the previously reported cases together with those of the present study. The majority of these defects were located in the cuspid and/or premolar area and were diagnosed in men in their fifth and sixth decades of life. Almost all defects contained normal salivary gland tissue. The differential diagnosis, treatment, and pathogenesis of these defects are discussed.