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Biomedical subjects

M Teodosijević

Publications and source records attributed to M Teodosijević.

18 recordsLinked to original sources
PubMedDate not supplied

[Physiological duration of the silent period in masticatory muscles].

"Silent period" is the reflex pause or the period of suppressive activity that is subsequent to some sort of stimuli during or after the muscle contraction. In current dentistry, "silent period" registered by electromyography presents in functional diagnosis one of the parameters in revealing the functional disturbances of neuromuscular system. The aim of the study was to investigate the physiological duration of "silent period" in masticatory muscles. The group of examinees comprised 4 males and 4 females of average age 29 years. All the examinees were with healthy stomatognathic system and natural dentition. "Silent period" was registered by the apparatus "Medlec" Mystro-MS 20 using intramuscular electrodes. The results of the investigation indicated the different duration of physiological "silent period", depended on the type of investigated muscle.

Adult↗
PubMedDate not supplied

[Registration of the silent period in masseter muscles during study of the mandibular reflex].

Under the application of clinical electromyography, nowadays is more widely used reflex investigation, i.e., the investigation of the reflexes to the extension. In stomatognathic system is the most frequently applied the investigation of mandibular reflex. Silent period was registered during the investigation of mandibular reflex. Silent period is the reflex pause or the period of suppressive activity that is subsequent to some sort of stimuli during or following muscle contraction. In current dentistry, silent period, registered by electromyography, represents an important parameter in functional diagnosis. The aim of the study was to establish the duration of silent period in masseter muscles during the investigation of mandibular reflex in edentulous patients with the pair of newly made full dentures and in the subjects with natural healthy intact dentition, respectively. The investigation included 20 subjects of average age 44 years. The results of registered silent period during the investigation of mandibular reflex in edentulous patients had the lower values (18.21 ms) than in the subjects with healthy intact dentition and with a pair of newly made full dentures (20.51 ms), respectively, which have confirmed the physiologic time of the duration of silent period.

Denture, Complete↗
PubMedDate not supplied

[Electrognathography and its application in dentistry].

The problem of spatial recording and analysing of mandibular movements was always of interest in dentistry. The permanent development of new technologies has resulted in a wide range of various methods and measuring systems for recording mandibular movements. However, only some of them have fulfilled a greater number of evaluation demands of modern measuring systems, which permit their industrial production. The paper discusses electrognathography as one of the most up-to-date methods widely used in the study of mandibular kinetics. The principles, performance and various possibilities of use of the two commercial electrognathographic apparatuses, now present on the world market, are presented. They are Sirognathograph (Siemens A.G., Bensheim, W. Germany) and Mandibular Kinesiograph (Myo-tronics Research, Seattle, U.S.A.)

Dental Occlusion↗
PubMedDate not supplied

[Use of biological feedback in persons with complete new dental prostheses during the initial period of functional adaptation].

Adductor muscles muscular tone of new complete denture wearers in the period of initial functional adaptation was investigated as well as the use of visual feedback with EMG method for more efficient use of dentures. Thirteen persons of 63 years average were investigated. Action potential of masseter muscle surface layers and pterigoid muscles anterior layers on both sides were registered. Subjects were instructed how to adjust the mandible from the rest position to the full contact with upper denture teeth and to keep it that way for 5 minutes, 3 times a day. Intensity of measured muscle activity was controlled immediately after denture insertion as well as 7, 14 and 21 days after insertion. The greatest amplitude values of all of four examined muscles were registered after denture insertion. Expected changes due to the use of visual feedback had favorable effect on muscular tone lowering during the following period. Maximal therapeutic tone was reestablished.

Action Potentials↗
PubMedDate not supplied

[Microbiological findings on Vikopres paste after functional impressions of the upper jaw].

The microbiological status and disinfecting effect of Vikopres zinc-oxide eugenol paste was investigated after the functional impression was taken. The examinees were persons with edentulous maxilla (n = 32). The silicon paste of similar viscosity applied in the same persons was used as the control. The samples for microbiological tests were taken immediately, 30 minutes later and 3 hours after the impression was made. Significantly less samples with positive bacteriological findings were found on Vikopres paste, compared to the control one.

Aged↗
PubMedDate not supplied

[Electromyography recording of the silent period in masseter muscles in persons with total dental prostheses with various vertical occlusal dimensions].

Silent period is reflex pause or period suppressed activity after some kind of simulation during or after muscular contraction. In dentistry electromyographically registered silent period has important place as method of functional diagnosis. The aim of this investigation was to establish duration of silent period in both masseter muscles of persons with complete dentures in normal increased and decreased occlusal vertical dimensions. Subjects of investigation were 4 men and 4 women, average of 65 years. Occlusal vertical dimensions were established electromyographically. For every subject tree sets of complete dentures were made: with normal, increased and decreased occlusal vertical dimension for 4 mm. Silent period was registered by "Medlec" Mystro-MS 20 apparatus with intramuscular leads. The differences of silent period duration were registered among all three vertical dimensions, especially between and increased occlusal vertical dimensions.

Aged↗
PubMedDate not supplied

[Use of the maximal physiologic load test in the evaluation of functional values of newly made complete dentures and dentures rebased by the Rehm method].

There is a constant dilemma of dental practitioners in contact with patients in whom complete dentures have lost congruent relation toward supporting mucoosseous tegmen if new dentures should be made or rebased by change of denture base. The investigators who have studied those problems have been mostly concerned with problem of material and rebasing procedures of complete dentures. The aim of the study was to determine the functional value of unrebased, rebased by Rehm and new complete dentures and compare the time of initial functional adaptation of patients to rebased and new complete dentures. The study included 72 examinees. The functional value of complete dentures was estimated by test of masticatory muscles, bioelectrical activity by test of masticatory efficacy and by test of maximal physiological load. On the basis of the study it was concluded that complete dentures rebased by Rehm were in function worthier than unrebased, and the period of initial functional adaptation was missing. In the examinees with pair of newly made complete dentures, functional tests revealed the reduction of initial values after the new dentures were delivered. During the examination interval, progressive dynamics with tendency of establishing the optimal functional value and initial functional adaptation was revealed after 21 days.

Bite Force↗