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Biomedical subjects

H Landt

Publications and source records attributed to H Landt.

At least 37 records · Page 2Linked to original sources
PubMed1979

Oral recognition of forms and oral muscular coordination ability. A longitudinal study in young adults.

A study has been carried out to investigate the constancy of results in oral recognition of forms (RF-test) and in tests which demand a fine coordination of the oral muscular apparatus (MA-test). Twenty examinees with a mean age of 22.5 years were tested with both test forms in 1972 and retested 4 years later in 1976. The performances in the RF- as well as in the MA-test improved considerably. As to the learning (training) effect in both test forms, the test results acquired by training during the previous period have largely been preserved until the next test period 4 years later. Individuals with a given capacity to perform either the RF- or MA-test, showed about the same grade of ability 4 years later. The RF- as well as the MA-test seem to reflect a given ability, which, at least in this age-group, remained constant during a period of 4 years. These results may be explained by reference to the notion of schema in which some motor-sensory feed-back will be stored. The specificity of the perceptual and motor patterns used, may have produced schemata with good resistance against forgetting.

Adult↗
PubMed1979

[The reproducibility of bite registrations].

The results indicate that the reproducibility of the hinge axis of mandibular movement with an accuracy of less than a few millimeters is almost impossible. The results also show that a facebow constructed on the basis of the average measurements is adequate for the general dental practice.

Dental Articulators↗
PubMed1979

[A general roentgenographic procedure with high reliability and minimum radiation exposure].

Needs for exposure procedures in dental radiography with improved reliability and radiation hygiene, that can be applied with a minimum of time, have been documented. This publication presents a systematic approach to reliable dental radiography using beam guiding instruments which may meet such requirements. It can provide accurate radiographs in endodontic, periodontic and general practice and is adaptable to more time consuming special purpose radiography, including "serial identical" exposures and exposures of handicapped or anaesthetized patients.

Humans↗
PubMed1977

[Impression materials and the wettability of dentin surfaces].

Two reversible hydrocolloidal impression materials as well as two light-bodied polysulfide and silicone impression materials were tested with regard to their properties of coating plain ground dentin surfaces. With a wet surface, hydrocolloids produce flatter contact angles between dentin surfaces and the impression material, i. e. a more effective coating than polysulfide and silicone impression materials. The conditions are reversed with dry dentin surfaces and those pretreated with silicone oil. If the dentin surfaces of which an impression is to be taken are treated with silicone oil, coating is less effective with all impression materials tested.

Colloids↗