Biomedical subjects

K Michi

Publications and source records attributed to K Michi.

At least 91 records · Page 5Linked to original sources

PubMed1981

The articulatory characteristics of the tongue in anterior openbite: observation by use of dynamic palatography.

The tongue movements during the production of Japanese speech sounds in five patients with anterior openbite associated with 1-5 mm of overjet were investigated using dynamic palatography and cinematography. The dynamic palatograph is an electric device capable of recording constantly changing palatolingual contact as a function of time by use of a thin plastic artificial palate equipped with 63 electrodes. As a result, the following articulatory characteristics were observed during the utterance of the Japanese sounds /s/,/f/,/t/,/d/,/n/,/r/,/ts/,/tf/,/dz/,/d3/. (1) The area of maximal palatolingual contacts was smaller than the normal. (2) Forward positioning of the tongue was confirmed in all cases. (3) The interruption of the breath stream was made with the dorsal surface of the tongue and the maxillary anterior teeth. (4) The sounds /s/,/f/,/dz/,/d3/, were recognized as distorted sound as /theta/, in English.

Adolescent↗

PubMed1981

Mandibular growth following ankylosis operation in childhood.

To clarify the effects of operation for temporomandibular joint (TMJ) ankylosis in early childhood on mandibular growth, cephalometric x-ray films of two congenital cases in children who were operated at 2 years old were obtained longitudinally for 9 years. Comparison with those operated at 12 years old, and normal children at the same age, gave the following results: (1) Mandibular retrognathia is slighter than in cases operated later; (2) The mandibles showed a rate of growth nearly the same as that of normal mandibles postoperatively; (3) Forward-downward craniofacial growth was recognized in the cases of early operation; and (4) In the unilateral case, the deviation of the median line of the mandible to the affected side became slighter postoperatively. At present, functional restoration is satisfactory in early-operated cases. In conclusion, it is suggested that restoration of function of the TM joint by early operation is more effective for mandibular growth.

Age Factors↗

PubMed1981

Ascending ramus for reconstruction of the mandible.

We have developed a technique for an immediate bone graft utilizing the anterior part of the ascending ramus for repair of bone defects resulting from resection. We applied this operative procedure to a case of an extensive ossifying fibroma of the mandible. As a result, the postoperative x-ray examination showed a well-restored shape of the mandible, and the postoperative function was excellent.

Adult↗

PubMed1979