Yoshikane Nakano

Lingual mandibular bone defect--idiopathic bone cavity. Report of a case.

A case of a lingual mandibular bone defect, like idiopathic bone cavity mimicking a large tumor, is presented. This case is very rare and unique with regard to the site, size and form of the lesion, as compared with cases reported previously.

Orientation of cleavage lines, fibrous connective tissues and blood vessels in the facial skin

The cleavage lines experimentally produced on the facial region in 30 Japanese cadavers were investigated macroscopically and histologically. The results obtained showed the same directional arrangement of the cleavage lines, fibrous connective tissues (especially the collagen fibres) and blood vessels.

Facial fibrous dysplasia report of a case

A case of facial fibrous dysplasia that involved the left frontal, temporal, malar, and mandibular regions is reported. Conservative recontouring was done several times when the patient was 16 to 23 years of age.

Relation between cleavage lines and scar tissues.

As viewed in relation to cleavage lines, the histological structure of scar tissues, whether old or new, closely simulates the structure of a cable. Bundles of collagen fibres, the main component of scar tissue, that run at right angles to the direction of the cleavage lines, may be likened to a cable core while fibres that surround the main structure of the scar tissue, parallel with the direction of the cleavage lines, may be likened to the coating material of a cable.

Reduction and fixation of jaw fractures using acrylic splints

This paper proposes the criteria for application of acrylic splints in the treatment of various types of maxillofacial fractures. These were based mainly on the number of remaining teeth that are important for the restoration of occlusion. The acrylic splints studied consisted of intermaxillary, lingual and labiolingual types that hold a dental arch and a cap type that covers a dental arch. It was found that the intermaxillary type was best indicated for the loss of multiple teeth, the lingual type for the predicted intraversion of bone fragments and the labiolingual as well as cap types for the deciduous or mixed dentition. Clinical application based on the above standard, which was attempted in our 60 patients, produced successful results. In addition, the usefulness of these acrylic splints as an intraoral apparatus was discussed.

Cleavage lines of the oral mucosa in Japanese cadavers.

Cleavage lines were experimentally reproduced in the oral mucosa of Japanese cadavers. They were investigated macroscopically and histologically. The reproduced cleavage lines showed little directional variation by sex or age. From the histological findings, the mucosal cleavage lines were interpreted to represent cleavage split along the direction of connective tissue fibres in the lamina propria.

Histologic Studies on the Relationships of Cleavage Lines and Arrangements of Dermal Vessels in the Facial Skin of Japanese Cadavers

There are many literatures that are related with cleavage lines or dermal supplies. But relationt of both are almost unknown. So I made cleavage lines on eight Japanese cadavers faces. Then I made various sectional specimens according to cleavage lines or facial midline on each nasolabial, mental and lower labial regions of the skin.1) On shallow and deep dermis of every regions, there were so many vessels arranged to vertical direction for surface of skin. And they formed so-called subdermal and dermal plexus on the parts.2) On nasolabial region, vessels forming subdermal and dermal plexus were arranged to the same direction with regular cleavage lines.3) On mental region, vessels forming subdermal and dermal plexus were arranged to the same direction with irregular cleavage lines.4) On lower labial region, vessels forming subdermal plexus were arranged to the same direction with irregular cleavage lines, but vessels forming dermal plexus were arranged to the same direction with regular cleavage lines.

Clinical Studies on Diabetes Mellitus and Diseases of Oral Region

Of the 25,672 patients who visited this clinic between January 1964 and March 1973, 126 were diabetic. These were examined statistically and the following results were obtained. 1. Together with diabetes the following disorders pertaining to the realm of oral surgery were observed: Alveolar pyorrhea (49 cases), infection of oral tissues other than periodontal tissues (24 cases), simple periodontitis (15 cases), tumors (13 cases), dental caries (9 cases), neuralgia (6 cases) and several disorders. 2. Of these 126 cases, 85 needed tooth extraction, which was actually performed in 67 cases with the following results: (a) Of the 67 cases, 13 developed complications such as dry socket, postoperative infection, sequestrum around the extraction socket, etc. This was a significantly higher incidence than in an equal number of controls. (b) In the cases with complications convalescence was prolonged to an average of 54.2 days. (c) In the cases with complications, the preoperative fasting blood sugar level averaged 194.5 mg/dl, which was much higher than in the cases which did not develop complications (average 142.4 mg/dl).