Malignant salivary gland tumours in Sweden 1960-1989--an epidemiological study.

Epidemiological data from the Swedish Cancer Registry of new cases of malignant major and accessory salivary gland tumors in Sweden between 1960 and 1989 are presented, including the total number and the age-standardised incidence rate per 1 million population, by site and sex, I(s). An analysis of the various histopathological types of malignant salivary gland tumours in the different sublocations is also given. A comparison is made between the three 10-year periods 1960-1969, 1970-1979 and 1980-1989 regarding total number and I(s).

Association between expression of stratum corneum chymotryptic enzyme and pathological keratinization in human oral mucosa.

Stratum corneum chymotryptic enzyme (SCCE) may function in the degradation of intercellular cohesive structures in the stratum corneum preceding desquamation. Previous results have suggested that SCCE may be specifically expressed in squamous epithelia undergoing terminal differentiation and keratinization. The aim of the present work was to further elucidate the association between SCCE expression and terminal differentiation in squamous epithelia.

Life-style survey of patients with oral lichenoid reactions.

The occurrence of different life-style patterns, including marital status, educational level, nutrition, tobacco and alcohol use, and frequency of physical activity, in patients with oral lichenoid reactions (OLR) in total or partial contact with amalgam fillings was examined. When compared with an age- and sex-matched control group, the daily intake of carbohydrates, fibers, and iron was statistically significantly higher in the OLR patients. Regarding marital status, there was a statistically significant difference between the OLR patients and the control subjects, the former group containing more people who were divorced or whose spouse had died.

Odontogenic keratocysts--a retrospective clinical and histologic study.

Including 25 recurrences, the material comprised 87 odontogenic keratocysts (OKCs) from 57 patients, who had been treated in 1974-93. The study included an analysis of clinical and histologic data from the patients' records and from pathologic reports. The men:women ratio was 1.

Amalgam-associated oral lichenoid reactions. Clinical and histologic changes after removal of amalgam fillings.

Objective And Study Design: Forty-nine consecutive patients with clinically diagnosed oral lichenoid reactions in contact with amalgam fillings were studied clinically and histologically. The long-term effect of replacement of these fillings was also examined.

Results: Seventeen (35%) patients showed positive reactions to mercury at the epicutaneous patch test that was carried out before treatment.

Psychologic aspects of patients with oral lichenoid reactions.

Psychologic aspects of 49 patients with oral lichenoid reactions (OLR) in contact with amalgam fillings were studied and compared with an age- and sex-matched control group. Psychologic factors such as personality, psychologic functioning, and quality of life were determined by using the Karolinska Scales of Personality (KSP), an additional Personality Scale (PS), a Psychological Functioning Scale (PFS), and a Quality of Life Scale (QLS). With regard to personality the OLR patients had significantly higher scores on the muscular tension and suspicion scales and significantly lower scores on the indirect aggression scale.

X-ray microanalytical and morphological observations of the interface region between ceramic implant and bone.

In 8 monkeys both the maxillary lateral incisors were extracted. In the 16 extraction sites an Al2O3-ceramic dental implant (Frialit) was immediately inserted. Eight implants were submerged under the oral mucosa and the other 8 were allowed to penetrate through the mucosa during the observation period.

Cognitive therapy in the treatment of patients with resistant burning mouth syndrome: a controlled study.

The effect of cognitive therapy (CT) on resistant burning mouth syndrome (BMS) was studied. Thirty patients with resistant BMS after odontological and medical treatment were randomly divided into two equal groups; a therapy group (TG) was treated with CT and an attention/placebo group (APG) served as a control group. The intensity of BMS, which was estimated by the use of a visual analogue scale, was significantly reduced in the TG directly after CT was completed and was further reduced in a 6-month follow-up.

Malignant oral tumours in Sweden 1960-1989--an epidemiological study.

Epidemiological data from the Swedish Cancer Registry of new cases of malignant oral tumours in Sweden 1960-1989 are presented, including the total number and the age-standardised incidence rate per 1 million population, by site and sex, (I(s)). An analysis of the various histopathological types of malignant oral tumours in the different sublocations is also given. A comparison is made between the three 10-year periods 1960-1969, 1970-1979 and 1980-1989 regarding total number and I(s).

Personality characteristics of patients with resistant burning mouth syndrome.

The personality characteristics in 32 patients with resistant burning mouth syndrome (BMS) after treatment of diagnosed medical and odontologic diseases were examined and compared with a sex- and age-matched control group. After evaluation of burning mouth symptoms, the personality, the psychologic functioning, and the quality of life were determined by using the Karolinska Scales of Personality (KSP), an additional Personality Scale (PS), a Psychological Functioning Scale (PFS), and a Quality of Life Scale (QLS). The result showed that, compared with a control group, the patients with resistant BMS had a significantly lower score in socialization scale and significantly higher scores in somatic anxiety, muscular tension, and psychasthenia scales.

Clinical study of patients with burning mouth.

Analysis and treatment of dental and medical factors that can cause burning mouth were performed in 25 consecutive patients according to a treatment protocol. The effect of the dental and medical treatment on the burning mouth was evaluated. The sick leave profile was presented.

Worldwide survey on distance learning in dental education.

This paper reports the results of a worldwide survey on distance learning initiated by the FDI. The results indicate that dental associations in many countries are in the process of investigating the various options available, and in development, for bringing continuing education to their members with the maximum convenience and effectiveness. Details are given of advantages, disadvantages and relative costs of the different methods undertaken.

Exposure parameters and their effects on diagnostic accuracy.

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.

Media aids in dental distance learning.

The need for continuing education on a wide scale necessitates the use of techniques that are effective irrespective of the geographical spread or isolated locations of potential participants. This paper reviews the many possibilities for distance learning in dentistry made feasible by use of these different techniques and media.

Oral lichen planus lesions in contact with amalgam fillings: a clinical, histologic, and immunohistochemical study.

Fifty-one consecutive patients had clinically diagnosed oral lichen planus (OLP) lesions in total or partial contact with amalgam fillings. The clinical features of the OLP lesions were characterized and registered, and biopsies were obtained from each OLP lesion. Histologic and immunohistochemical studies were performed, as well as tests for allergy to dental materials.

Description of persons with symptoms presumed to be caused by electricity or visual display units--oral aspects.

A questionnaire containing 20 questions was sent to 127 members of the Association for Those Injured by Electricity and Visual Display Units in northern Sweden, of whom 103 (81%) answered. The questionnaire consisted of questions about age, sex, and place of work. Furthermore, the members were asked to state: 1) their general and oral symptoms; 2) whether they thought that dental amalgam and other types of dental filling materials had affected their symptoms; 3) whether they were replacing or had replaced their amalgam fillings and, if so, what effect it had had on their symptoms; 4) whether they had been medically examined; and 5) whether they were or had been sick-listed for their complaints.

Cell kinetics of head and neck squamous cell carcinomas. Prognostic implications.

Forty-three squamous cell carcinomas of the head and neck region were in vivo labelled with the thymidine analogue iododeoxyuridine. Combined flow cytometric (FCM) and immunohistochemical (IHC) analysis was performed, and the following parameters calculated: labelling index (LI), S-phase time (TS) and potential tumor doubling time (Tpot). Complete FCM and IHC analyses could successfully be performed in 31 cases, showing a median LI of 13.

Effect of low level energy laser irradiation on wound healing. An experimental study in rats.

In this randomized experimental study the wound healing process in rats was investigated after treatment with low level energy laser. In the caudal area of the back of 38 rats, standardized full thickness wounds were punched out bilaterally. The animals were randomly divided into two groups, A and B with 19 rats in each group.

Burning mouth syndrome: literature review and model for research and management.

The literature on burning mouth syndrome (BMS) is reviewed with particular reference to its prevalence, local and systemic etiologic factors, psychogenic background and treatment. Research requirements are discussed, which focus on different clinical and psychological parameters and the necessity to evaluate BMS. Finally, a treatment protocol including oral, medical and psychological investigations is presented.

Human pulpal response to direct filling gold restorations.

Class V cavities were prepared in 47 caries-free premolars intended to be extracted for orthodontic reasons. A powdered gold filling material, Goldent, which can be hand condensed, was used for direct fillings. The following test groups were used: (A) cavity preparation, no filling, (B) cavity filled with Goldent only, (C) cavity lined with Tubulitec and filled with Goldent, (D) cavity with Goldent filling, sealed with IRM, and (E) positive and negative controls.

Comprehensive medical examination of a group of patients with alleged adverse effects from dental amalgams.

Mercury from dental amalgams does not seem to cause dose-related intoxications. However, animal studies have shown that high-dose exposure to mercury may support various types of immunologic reactions. Ten patients claiming that their symptoms were caused and aggravated by amalgam therapy were selected for a study of the effects of removal of one amalgam restoration followed by placing of a composite filling.

Gingival fluid and tissues around successful titanium and ceramic implants. A comparative clinical, laboratory, and morphologic study.

The gingival tissue reactions around 19 titanium implants (Brånemark System) and 6 ceramic implants (Frialit) were studied by using established variables for monitoring periodontal status. Natural teeth in the same or the opposite jaw served as controls. Both clinical and laboratory examinations showed healthy gingival status.

Tissue integration of Al2O3-ceramic dental implants: an experimental study in monkeys.

The effect of two different treatment modalities on the tissue integration of Frialit implants was compared in an experimental study in 10 monkeys. The maxillary central incisors were extracted. In one extraction site, chosen by lot, a Frialit implant was immediately inserted, allowing the implant to penetrate the oral mucosa.

Titanium implant anchorage in orthodontic treatment an experimental investigation in monkeys.

Tooth loss can be a problem when orthodontic appliances have to be stabilized for treatment. It has been shown that endosseous titanium implants are well integrated during treatment of edentulous patients with intra-osseous anchored bridges. In the present investigation titanium implants were inserted immediately after tooth extraction.