Biomedical subjects

T Haketa

Publications and source records attributed to T Haketa.

3 recordsLinked to original sources

PubMed2005

The comparison between pains, difficulties in function, and associating factors of patients in subtypes of temporomandibular disorders.

The aim of this study was to compare the multidimensional properties among subtypes of painful temporomandibular disorders (TMD): myofascial pain (group I), disc displacement (group II), arthralgia (group IIIa) and osteoarthritis (group IIIb). A total of 511 patients answered a battery of questionnaires, which included questions relating to intensity and duration of pain, the Japanese version of the McGill Pain Questionnaire, limitation of daily functions, the Hospital Anxiety and Depression Scale, the Eysenck Personality Questionnaire short-form and 34 items of behavioural contributing factors. Group IIIb showed significantly the highest age in all subtypes. Those in group I had higher depression scores than those in group II (P = 0.005). Group IIIa had a lower women's ratio than in group II (P = 0.001) and the patients showed a shorter pain duration than those in groups I (P = 0.000) and II (P = 0.001). Group IIIa patients also showed lower visual analogue scale (VAS) ratings for pain descriptors 'heavy' (P = 0.002) and 'tiring' (P = 0.004) than those of group I, and 'dull' (P = 0.005), 'heavy' (P = 0.001) and 'tiring' (P = 0.005) than those of group II. Group IIIa showed lower ratios of contributing factors of 'an awareness of grinding/clenching during sleep' (P = 0.000) and 'an awareness of clenching sensation when waking up at night' (P = 0.002) than those of group I, and also showed a higher ratio of 'a liking for a hard food' (P = 0.000) and lower ratio of 'talking for a long time on the telephone' (P = 0.001) than those of group II. In conclusion, although several properties were different between subtypes, the majority of them were similar in the four subtypes of TMD.

Activities of Daily Living↗

PubMed1993

[Influences of cusp inclination on stability and function of removable partial dentures].

The influences of cusp inclination on the stability and the function of removable partial dentures were evaluated on 5 subjects with the maxillary unilateral free-end saddle. An experimental removable partial denture was made with six pressure sensors fixed on to the basal surface. The artificial teeth were replaceable by attachment. Several metal maxillary canine risers were made to change the inclination of the lateral gliding movement. During lateral gliding, the canine risers and the artificial teeth were contacted with the opposing mandibular teeth simultaneously. The pressures exerted upon the supporting tissues and the mandibular movements were measured during mastication with each artificial teeth of different cusp inclination. The results were as follows: 1. The steeper cusp caused the reduction of the peak pressures as well as the total pressures in most measuring spots. 2. The time differences of the first and the peak pressure detection between 6 measuring spots extended as the cusp became steeper. 3. The mandibular movements were influenced by the cusp inclination especially in the subjects with tear-drop type masticatory strokes. 4. It was suggested that the moderate cusp of artificial teeth contributed to the denture stability in function.

Adult↗

PubMed1991

[Newly devised subcutaneous needle electrodes for EMG recording].

Subcutaneous needle electrodes made of stainless steel were newly devised for ease of handling and perfect insulation. This needle (phi 0.20 mm) is used for acupuncture. The electrodes had the capability to record the EMG activity easily from a certain muscle. Then, the EMG activities of the masseter muscle were recorded with both these needle electrodes and surface electrodes and the results were compared. 1. Insertion of the electrodes into the subcutaneous tissue was easily performed because of the application of the acupuncture needle and their lightness of 0.2g was effective in fixing the electrodes on the skin without causing any tension. 2. After the insertion of the needle electrodes, the impedance showed below 5 kohm immediately, and the EMG recordings during biting could be simply achieved with great stability. 3. The action potential from the needle electrodes was less than that from the surface ones. The former reacted more sensitively to the change in the distance between the electrodes, compared with the latter.

Action Potentials↗