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Biomedical subjects

S Nyman

Publications and source records attributed to S Nyman.

At least 145 records · Page 8Linked to original sources
PubMed1976

The effect of systematic plaque control on bone regeneration in infrabony pockets.

A clinical trial was undertaken to test the hypothesis that periodontitis can be cured and that bone regeneration occurs in infrabony pockets in patients maintained on an optimal standard of oral hygiene. The material comprised 24 patients with advanced periodontal disease. After an initial examination, the patients were randomly distributed into one test group and one control group. All the patients were given instruction and practice in a proper oral hygiene technique, and then subjected to periodontal surgery using the modified Widman flap procedure. Following treatment, during a 2-year period the patients of the test group were recalled once every second week for professional tooth cleaning. The control patients were recalled once every 12 months for prophylaxis. The results showed that all osseous defects of the patients of the test group were refilled with bone. The control patients, on the other hand, could not maintain a high standard of oral hygiene, and exhibited a progressive deterioration of the periodontal tissues during the postsurgical observation time.

Adult↗
PubMed1975

Functional analysis of fixed bridges on abutment teeth with reduced periodontal support.

The present study examines the function of fixed bridges on abutment teeth with reduced but non-inflamed periodontal tissues. Eighteen patients with advanced periodontal breakdown and indication for oral rehabilitation received periodontol treatment and their dentitions were restored with fixed bridgework. The analysis of function performed 2-5 years after insertion of the reconstructions was made by (1) evaluation of the patients' opinion on chewing ability and function of the masticatory system; (2) clinical examination of the border movements of the mandible, the status of the temporomandivular joints and the chewing muscles, and (3) measurements of the bite force indifferent areas of the dentition. The results of the study show that the functional capacity of the type of extensive bridgework discussed is good and that the patients--in spite of severe loss of periodontal tissue--achieve bite force values that are almost comparable to those in individuals with natural teeth. Comparison of the function of fixed bridges and that of removable dentures is also discussed.

Adult↗
PubMed1975

The role of occlusion for the stability of fixed bridges in patients with reduced periodontal tissue support.

The present investigation reports how occlusion may be utilized to establish and maintain stability of fixed bridges in patients with markedly reduced periodontal tissue support. The material consisted of 20 adult patients, aged 27-69, with advanced periodontal breakdown, often in combination with extensive loss of teeth. After periodontal treatment, the patients were rehabilitated with fixed bridges, whose stability was evaluated once a year for 2 to 6 years. The results show that permanent stability of bridgework can be obtained in patients where there is a minimum of remaining periodontal tissue support, even in combination with marked hypermobility of individual abutment teeth. The stability was achieved by proper treatment of the diseased periodontal tissues, and by establishment of stable occlusion in the intercuspal position. When there was a risk of bridge mobility on excursive movements of the mandible, balancing contacts were established for the prevention of migration, tilting and increasing mobility. The study also shows that cantilever pontics can be used to achieve and maintain the stability of fixed bridgework.

Adult↗
PubMed1975

The effect of plaque control and surgical pocket elimination on the establishment and maintenance of periodontal health. A longitudinal study of periodontal therapy in cases of advanced disease.

The present clinical study was initiated in 1969 to test the hypothesis that microbial plaque is the cause of periodontal disease and that hence even advanced cases of periodontitis can be cured in patients willing to exercise optimal plaque control. The material consisted of 75 patients with severe destruction of the periodontal tissues. The patients were selected for the study because of their ability to maintain plaque-free dentition. Following an initial examination, a preliminary treatment plan was presented to the patients. This plan included detailed instructions in plaque control measures, scaling, root planning and emergency dental care, including endodontic therapy and extractions. Three to six months after the termination of the so-called presurgical treatment, surgical elimination of pathologically deepened pockets was performed. The patients were recalled every 3 to 6 months after the end of the treatment. At these reexaminations the following parameters were assessed: Plaque Index, Gingival Index, Pocket Depths, Marginal alveolar bone topography and height. The results demonstrate that it is possible to treat periodontal disease successfully, even in advanced stages, in patients willing to maintain plaque-free dentition.

Adult↗
PubMed1975

Effect of professional tooth cleaning on healing after periodontal surgery.

The investigation was undertaken to find out whether favourable conditions for healing after periodontal surgery would develop in patients whose oral hygiene was professionally maintained at a high standard. The study was performed on 20 patients with advanced periodontal disease. Following an initial examination, comprising plaque index and gingival index scoring, measurement of pocket depths and loss of attachment, the patients were randomly distributed between a test and a control group. The patients first received professional cleaning of the teeth once every 2 weeks. The patients of the control group were recalled for scaling of the teeth once every 6 months. All patients were reexamined after 6, 12 and 24 months. It was found that the control patients were unable to maintain a high standard of oral hygiene with the result that the treatment of the periodontal disease failed. The patients of the test group maintained a high standard of oral hygiene, and the treatment of the periodontal disease was, therefore, successful.

Dental Plaque↗
PubMed1975

Periodontal treatment of multirooted teeth. Results after 5 years.

This paper describes: (1) a system for classification and treatment of furcation involvements, and (2) a 5-year post-operative evaluation of 100 patients treated for periodontal breakdown in the bi/tri-function areas. The results of this study demonstrate that it is possible to arrest further destruction within the root furcation area. The successful treatment of the multirooted teeth was probably the consequence of: (1) the quasi total elimination of plaque retention areas from the bi/tri-furcation area, and (2) meticulous oral hygiene by the patients.

Dental Plaque↗
PubMed1975

A radiographic method for assessing changes in alveolar bone height following periodontal therapy.

A method is described for obtaining reproducible radiographs of several groups of teeth in the same jaw. The method was applied to assess changes in the alveolar bone height following periodontal treatment. An oral device was designed to permit direction of the central rays of the beam perpendicularly to the alveolar process in different parts of the jaws. The exposures were made at 60 kVp and 10mA, and standardized procedures were used for developing, fixing and rinsing the films. Alterations in the marginal alveolar bone level were determined in a stereocomparator system. The reproducibility of the method was determined. A pilot experiment was performed on 5 patients with periodontal disease. Following conservative treatment, including scaling and root planning, all patients were subjected to periodontal surgery, including alveolar bone denudation. Radiographs of the alveolar bone were obtained before and 2 months after the operation. By measuring in the stereocomparator parallaxes of both control points and points of the alveolar bone crest on paired radiographs, a mean decrease in interproximal alveolar bone height of 0.69 mm was found. Taking into account the small errors which are inherent in the method, this change in bone height could be regarded as a reliable measure of actual loss of bone.

Adult↗