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Biomedical subjects

W Kalk

Publications and source records attributed to W Kalk.

At least 19 recordsLinked to original sources
PubMed1992

[Treatment of (pre)-edentulous patients. After care and directives].

It can be expected that the percentage of edentulous people wil decrease in the coming decades as a result of an improved oral health, whereas the number of edentulous people will not decrease as a result of the strong increase of the ageing population. If the preservation of the natural dentition is no longer possible, the remaining teeth of a mutilated dentition have to be extracted according to some specific principles. But also the aftercare of the edentulous patient has to be extended according to some specific guidelines, within the framework of the so-called "preventive-prosthetic-treatment-strategy". Preservation of the alveolar process is the main goal in both cases.

Aftercare↗
PubMed1992

Is there a need for gerodontology?

One of the major criteria of successful ageing is maintaining a natural, healthy, functional dentition throughout life, including all the social and biological benefits such as aesthetics and comfort, and the ability to chew, taste and speak. However, the oral health of elderly people is far from optimal. The treatment needs are high due to edentulism, missing teeth, caries, periodontal diseases and tooth wear resulting in impaired oral functions. The demand for treatment is much lower than the need. In the future the elderly will retain their natural dentition and more teeth per individual will be present. Despite this there will be a rise in edentulousness due to the sharp rise in numbers of the elderly population. The 'new elderly' will be more critical and more demanding of oral health care services. The dental profession and governments in all industrialised countries must be aware of these trends which should be reflected in undergraduate and postgraduate education of dentists and in research. The European College of Gerodontology has been founded to contribute to solving all problems related to oral health and oral health care of the elderly.

Aged↗
PubMed1991

Measuring mandibular ridge reduction on oblique cephalometric radiographs.

The aim of this study was to test the accuracy of a setup for measuring alveolar ridge reduction of totally edentulous mandibles and of mandibles with abutment teeth for overdentures, on oblique lateral cephalometric radiographs. For that purpose, a cephalostat was modified so that the patient's head--in particular the mandible--could be fixed in a reproducible manner. Four radiographs were used for measuring all parts of the mandible. To assess the accuracy of the method, two randomly chosen parts of the mandible of 20 patients were X-rayed twice. The radiographs were traced independently by two observers and the height of the mandible was measured along a line drawn perpendicularly to the tangent of the lower border of the mandible on these X-rays. The method appeared to be simple, less time-consuming, and accurate. The average standard deviation of the measurements of the height of the mandible was 0.15 millimetres. When measuring ridge reduction, the standard deviation was 0.21 millimetres.

Alveolar Process↗
PubMed1991

Comparison of patients' views and dentists' evaluations 5 years after complete denture treatment.

This study describes a comparison of patients' views of their dentures and dentists' technical evaluations 5 yr after complete denture treatment. Of the original sample (n = 139) a test group of 92 patients remained available for the actual study 5 yr after treatment. Firstly, the patients filled in a questionnaire regarding their complaints of and (dis)satisfaction with dentures. Secondly, they were examined independently by two experienced dentists in order to evaluate their dentures. Finally, after considering the answers to the questions in the questionnaire and their own dentures' evaluation the dentists proposed a therapy. It was found that patients and dentists agree on assessments of denture retention, but do not agree on assessment of denture aesthetical aspects. Furthermore, it appeared that generally more therapy was rendered by the dentists than could be expected on the basis of their evaluations and the patients' views.

Attitude of Health Personnel↗
PubMed1991

Dental health behavior and attitudes--an application of correspondence analysis.

Differences in dental behavior and dental attitudes between people with (almost) all natural teeth, people with a full denture in both jaws and people with a full denture in only the maxilla are visualized by means of correspondence analysis in one overall picture. In this picture the three distinguished subgroups of dental patients and their characteristics are indicated as points in a two-dimensional space. The distances between the points in this picture show to what extent these points are connected. The findings obtained in this study can lead to the conclusion that: a. differences in dental status are related to differences in dental behavior and dental attitudes; b. people with all natural teeth and people with a full denture in both jaws obviously are opposite of each other in many respects, whereas people with a full denture in only one jaw can be characterized as a dental in-between group.

Adult↗
PubMed1991

[Elderly people in focus: future policy in dental health care].

In order to promote the independence and social integration and participation of the elderly, three prerequisites have to be fulfilled: a reasonable income, a suitable accommodation and a good health. The dental profession may contribute to the last condition by providing adequate dental care. The profession and the authorities dealing with elderly people's health must consult each other. More attention has to be given by dental schools to gerodontology and geriatric dentistry.

Aged↗
PubMed1991

[Tertiary prevention in elderly people; a prospective view].

The expected decrease in the prevalence of edentulousness in elderly people does not guarantee a good oral health. Since the elderly will retain more natural teeth in the future, whether or not suppleted with prosthetic provisions, their oral self-care becomes more demanding. However, in elderly people oral self-care becomes also more difficult. Attention has to be given to the tertiary prevention, also (or in particular) in elderly people.

Aged↗
PubMed1991

[The application of overdentures in the general dental practice].

Overdenture therapy is recommended in certain dental conditions. The main reason is that remaining teeth or roots underneath an overdenture decrease the resorption of the alveolar bone. There is little information about how acquainted general practitioners are with this therapy, how often they apply it and what potential obstacles to overdenture therapy they experience. Therefore, a postal investigation was made amongst dentists in the Netherlands. The data suggest that overdenture therapy is a well-known mode of treatment. Overdentures are applied in many dental practices but to a lesser degree than conventional immediate dentures. The negative attitude of the patients seems to be the most important obstacle to overdenture therapy. Therefore, the patient should be better informed about the advantages of this prosthetic appliance.

Alveolar Bone Loss↗
PubMed1991

Preventive implantations.

Preventive implantology is concerned with the preservation of the alveolar ridge of the (edentulous) jaw. Maintaining the volume of the alveolar ridge is a major problem in the prevention of oral disease. Loss of teeth and tooth roots leads to resorption of residual ridges. This being so, it is a logical approach to substitute artificial analogues for lost tooth roots. Hydroxyapatite implants have been studied as submerged tooth root substitutes and shown to maintain the bulk of the alveolar ridge. A drawback of the implants is that the ridge maintenance depends solely on the physical presence of the hydroxyapatite implants. No physiological influence on bone preservation can be attributed to the implants. However, long term research indicates that 75 per cent of the implants survive under full lower dentures and 100 per cent of the implants under fixed partial dentures.

Alveolar Process↗
PubMed1991

[The importance of denture identification].

It seems useful to recommend or to require by law also in The Netherlands the inclusion of identification markings on all dentures. Provision of this service by Public and Private Health Insurance can contribute to a uniform and common adjustment.

Denture Identification Marking↗
PubMed1990

Patients' complaints and satisfaction 5 years after complete denture treatment.

This study is based on an evaluation of patients' opinions of their dentures by means of a questionnaire. The patients had been provided with complete dentures at a university clinic. Of the original sample (n = 139) a test group of 92 patients remained available for the actual study 5 yr after treatment. The replies in the questionnaire were subjected to statistical processing and interpretation. Six clusters could be defined and these were introduced as "scales" representing the patients' score on a specific type of complaint. Apart from the six scales a score was achieved for each patient's overall satisfaction. The correlations between the various scales were calculated with the aid of a computer program. Finally, cross-tabulation was used to see if any significant (inter)correlations could be proved between complaints, satisfaction, and some of the patients' social data. It could be concluded that a correlation exists between complaints of pain and of functional aspects on the one hand and vague complaints on the other hand. There is also a correlation between complaints of looseness of the maxillary denture and complaints about aesthetic factors. Well-fitting and well-functioning dentures, absence of pain, and a socially acceptable appearance contribute much to the patients' satisfaction with dentures. Social variables such as type of insurance (public or private) and marital status influence denture appreciation to a certain extent.

Adult↗
PubMed1990

[Long term results of overdentures].

This article describes the long term results of overdenture therapy. The main goal--prevention of alveolar bone loss--appears to be achieved. Without preventive measures caries and periodontal diseases are frequently found. With the use of fluoride, possibly combined with chlorhexidine, and an optimal oral hygiene the prognosis is good. Taking these results into account the preservation of (roots of) teeth is highly recommended in the scope of preventive prosthodontics.

Alveolar Bone Loss↗
PubMed1990

[Differences between dentate and edentate people].

Differences in dental behaviour and dental attitudes between people with (almost) all natural teeth, people with a full denture in both jaws and people with a full denture in only the upper jaw are summarized by means of correspondence analysis in one overall picture. The findings obtained in this study can lead to the conclusion that: a. differences in dental status are related to differences in dental behaviour and dental attitudes; b. people with all natural teeth and people with a full denture in both jaws obviously are each other's opposites in many respects, whereas people with a full denture in only one jaw can be characterized as a dental in-between group.

Attitude to Health↗
PubMed1990

[Preventive goals in the treatment of the mutilated dentition].

It can be expected that the percentage of edentulous people wil decrease in the coming decades as a result of an improved oral health, whereas the number of edentulous people will increase as a result of the strong increase of the ageing population. If the preservation of the natural dentition is no longer possible, the remaining teeth of a mutilated dentition have to be extracted according to some specific principles. But also the aftercare of the edentulous patient has to be extended according to some specific guidelines, within the framework of the so-called 'preventive-prosthetic-treatment-strategy'. Preservation of the alveolar process is the main goal in both cases.

Denture Design↗
PubMed1990

[Position of removable partial dentures within prosthetic dentistry].

Recent developments in restorative dentistry resulted in a shift towards elderly patients with regard to the application of removable partial dentures (RPD). The half life time of a metal frame RPD is ten years. Negative effects of a RPD on the remaining dentition can be prevented by adequate oral hygiene, which is supervised in a recall program with an individually adjusted interval. Periodontal factors seem to be more important in the design of a RPD than biomechanical factors. Simplicity is a prime guideline in the design, especially in free-end situations.

Aged↗
PubMed1990

[Classification of edentulous mandibles in preventive implantology].

The aim of preventive implantology is to prevent or delay the resorption of edentulous alveolar ridges. The classifications of the resorption stages of the mandible which are now in use, are not applicable to preventive implantology. After anatomic research it was concluded that the resorption of the alveolar ridge of the mandible should be classified in three stages. Loaded as well as unloaded implants can function as tooth root analogues in maintaining the volume of the edentulous ridge.

Alveolar Bone Loss↗