In this paper the results of the clinicopathological study on a total of 79 bladder tumor cases are presented. They are principally related to the stromal proliferation or branching of the tumors. The tumor cases consist of those with a good prognosis as well as those with a poor prognosis. In the former category there are 61 cases with a long survival history (with or without recurrence); the remainder (18 cases) had a history of a short survival (dying within 2 years). Histologically there was a marked difference in the regularity of the stromal branching of the tumor between those cases with a long survival history and those cases with a short survival history. In the former group the regular type of stromal branching was predominant; in the latter group the irregular type was predominant.
The renal microvasculature was examined stereoscopically after intraarterial injection of silicone rubber. Specimens studied were: 29 cases of normal kidney, 4 cases of sclerotic kidney, 10 cases of acute renal failure, and 10 cases of chronic renal failure from the final stage of chronic glomerulonephritis, malignant nephrosclerosis, diabetic nephropathy, and cortical necrosis. The followings were common evidences for chronic renal failure: much reduction and wide deficiencies of filling in the cortex, increased filling of vasa recta, narrowing and spiralling of interlobular arteries and cortical afferent arterioles, appearance of giant glomeruli, rarefaction of the peritubular capillary plexus, and relative preservation of glomeruli in the juxtamedullary zone and vasa recta in the medulla may be the major pathway, after the interlobular arteries and afferent arterioles in the subcapsular cortex are destroyed, and these vascular architectural changes may be intimately related to the pathophysiology of chronic renal failure.
This study was done to evaluate the art of retaining the lower sub-complete, overlay denture, in relation to the abutment tooth mobility while the force was applied to the denture. The lower overlay denture was placed on a simulated model which was constructed of methyl-methacrylate and silicone rubber. The author developed and used the special devices for measuring the tooth mobility.
Results obtained were as follows: 1.When a force is applied directly to the abutment, the tooth mobility, i.e. the lateral excursion of the tooth, is markedly reduced according to the favorable ratio of the clinical crown to the root length. Splinting by the bar is effective to reduce the lateral excursion. 2.When a force is applied to the denture indirectly to the abutment tooth, the lateral excursion changes greatly according to the retainer selected. 3.The clasp retainer shows the greatest change in the lateral excursion against every loading on the denture. 4.All three types of bar attachment show the least value of lateral excursion.
This experiment was designed to investigate and evaluate the characteristic behavior of mandibular free-end saddle removable partial denture using various retainers. The abutment tooth displacement and saddle movement were measured while a known vertical force was applied on the saddle. Fifteen different types of free end saddle dentures were tested, using four various types of prefabricated attachments. Strain-measuring devices were used to measure the extent of abutment tooth displacement and saddle movement. The findings were as follows: 1)The force transmitted to the abutment tooth and the residual ridge were affected by (a) the selection of direct retainers, (b) splinting of abutment teeth, and use of indirect retainers, and (c) the variation in size and shape of the occlusal table on the saddle. 2)The influences by direct retainers a)With use of a resilient joint, the stress was heavily loaded on the residual ridge directly under the direction of force. b)With the joint incorporating the vertical rock-preventing device, a heavy proportion of lateral force was transmitted to the abutment tooth. 3)Both the lateral stress on the abutment tooth and movement of the saddle were reduced more effectively by use of indirect retainers than by splinting of abutment teeth. 4)Ry reduction of the occlusal area in bucco-lingual dimension, the denture saddle was better stabilized and the lateral stress on the abutment tooth was reduced effectively.
In order to obtain numerical data concerning the lingual muscle spindle distribution, the muscle spindles were histologically surveyed on the serial frontal and horizontal sections (stained by hematoxylin-eosin) from the apex to the radix of the tongue. On one side four hundred and sixty-six muscle spindles were counted in seven muscles, the superior longitudinal muscle containing 159 spindles, the genioglossus 80, the transverse 79, the styloglossus 75, the hyoglossus 37, the inferior longitudinal 22 and the vertical 14. The chondroglossus and the palatoglossus are devoid of the spindles. The question of whether the proprioceptive impulses from the lingual spindles lie in the hypoglossus nerve or in the lingual nerve has remained unsolved. This histological confirmation of the pathway and primary cell station of the lingual proprioceptive afferents is the subject in which the authors are greatly interested.
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 case), 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/di, which was much higher than in the cases which did not develop complications (average 142.4 mg/di).
As a preliminary experiment on the gingival color indicated by Munsell system, the makings or the qualities for color sensation of the individual were checked with regard to (I) discrimination threshold for color difference with certain color range of gingiva (paired difference test for color comparison) and (2) promotion of memorial power by training (test for memory color). A total of 20 males and females (20-30 years old) participated in this preliminary study as experimental subjects and the following results were obtained: (1) the average color discrimination threshold for color difference among subjects trained for color memory is 0.8 Lab. (Hunter), and is assumed to be greater in the actual colorimetry of gingiva, (2) the similarity of discrimination is more frequent among the subjects trained for color memory than among those who were not trained, and (3) training for color memory is found to be effective in promoting the ability for color discrimination.