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Biomedical subjects

J Holz

Publications and source records attributed to J Holz.

At least 109 records · Page 6Linked to original sources
PubMed1979

[Long-term clinical supervision of direct pulp capping (performed by the students of the School of Dentistry, Geneva)].

Of 123 teeth treated by direct pulp capping 110 could be rechecked clinically and radiographically after periods of 1 1/2 to 7 years, 4 on the average. In 25 cases a change in endodontic treatment has been recorded on the files: In 18 cases biopulpectomy was performed for symptomatic (pain) reasons considered as failure of the capping treatment; in 5 cases biopulpectomy was indicated for periodontal and prosthetic reasons (not considered as failure); in 5 cases of the 110 rechecked necrosis and periapical involvement was diagnosed. The rate of failure thus was 22 cases or 17%. This relatively high ratio of unfavorable results (Tab. VII) is in part due to lack of operative skill of the students while progressing tooth morbidity statistically established in the Genevan population also was taken into account. Advancing tooth ages according to graph figure 6 in accordance with other recent surveys were found to constitute no impediment for direct pulp capping. The success of this endodontic treatment is best ascertained by observing a strict selection of the case and the observance of an exacting operative procedure, namely: - Only accidentally exposed pulps without symptoms of previous spontaneous pain (Category I) are liable to successful conservation by direct pulp capping using calcium hydroxide. Previously painful pulps (Category II) according to Table VIII are either indirectly capped using corticosteroids particularly in young teeth or after exposure subject to coronal or radicular pulpotomy (Category III). Rigorous aseptical procedure and lasting hermetical sealing of the calcium hydroxide pulp dressing are additional prerequisites for success.

Adolescent↗
PubMed1978

[Principles of reasonable oral rehabilitation].

Dentistry today is becoming an amalgamation of medical science and precision technology. However, not all the techniques introduced in past years can be qualified as progress when the clinical results are closely examined. These results show that it is necessary to constantly reevaluate one's work in order to maintain a high standard of treatment. Every dental intervention should be planned in concurrence with the principles of prevention and cure, and executed with care and precision to avoid any progress or recurrence of the existing disease. Every oral rehabilitation should be effected following a strict sequence--establishment of good oral hygiene, precise diagnosis of the disease and careful study of the case, planning and coordination of the various interventions necessary, elimination of diseased tissue and restoration of the dentition in such a manner as to retain as much healthy tooth substance as possible and to avoid any over energetic--iatrogenic--elimination of tissue.

Humans↗
PubMed1977

[Criteria of success or failure in conservative dental treatments].

Any restorative procedure which is not effected with clinical precision and with due consideration to the principles of preventive dentistry is bound to fail. The main causes of failure, whether direct or indirect, are iatrogenic and can be avoided. Restorative procedures may be qualified as a success when a favorable, durable result is obtained. This result depends partly on the technique employed and partly on the products used, products which are too often tardively and insufficiently tested. This state of affairs underlines the urgent necessity of introducing standardized clinical controls for all new dental products.

Dental Restoration, Permanent↗
PubMed1976

[The possibility of a standardization of clinical trials concerning materials for root canal obturation].

Clinical trials constitute epidemiologic experiments, in comparable groups of human populations designed to assess the preventive of curative effects of agents or measures. International organizations (FDI, WHO, CIOMS, ISO) have been instrumental in creating uniform methods, so that the findings from different sources can be validly compared. The need for a standardization of clinical trials in dentistry is particularly felt: - by the dental profession in order to make the choice of materials with the best clinically proven qualities - by the manufacturers in order to develop materials of improved clinical quality - by the public health administrators (or social security agencies), in order to either evaluate the benefit of instituted preventive and curative measure or to ascertain the best possible services A centennial history of efforts is shown to have resulted today in a broad international understanding (Table III). 1. The first chapter of this paper presents a review of the principal requirements for controlled clinical trails [8] such as officially adopted by FDI (Table V). 2. The second chapter offers a first-hand apercu of impending recommendations proposed by COMIET in two protocols [11] for the uniform conduct and evaluation of clinical trials of restorative techniques and materials. 2.1 Three standardized forms (A, B: Table IX, and C) serve to uniformly record data of the operative procedures. 2.2 The proposed standardized criteria (Tables X, XI) for the clinical appraisal of distinct materials give the advantage of having been tested already very extensively. 3. A critical review of the proposed protocols [11] reveals the necessity of: 3.1 referring to and coordinating with the already adopted principal requirements for controlled clinical trials. 3.2 generally adopting the excellent guidelines for the conduct of the study and the evaluation of observations (Tables X, XI) 3.3 taking advantage of the possibilities for reducing the recommended sample of 100 paired restorations (200 cavities)--difficult to implement in many countries--by certain measure such as preliminary in-vitro experiments, consideration of results already reported in the literature and a more systematic use of a standardized photographic serial documentation, a topic which will be the object of an ensuing paper.

International Cooperation↗