The aim of this article is to review the literature concerning the general aspects of a fully adjustable articulator. A computer can play back when the informations are put into the computer and programmed. A fully adjustable articulator is a computer like device. Even though the fully adjustable articulator is designed precisely, it can not work without inputing the informations and programming into the articulator. That is the reason why various factors controlling the mandibular movements should be recorded and duplicated on articulator avoiding the possible errors.

For the assessment of peripheral blood leukocyte chemotaxis dysfunction in rapidly progressive periodontitis, peripheral blood leukocyte of 13 patients were isolated, and tested by the method of blind well chamber technique which was recently developed by Park. Data analysis was performed from the speed of cell migration from the bottom of filter paper to the top for 18 minutes at the condition of chemo-attractant(Zymosan-activated serum). Eight of the 13 patients (62%) exhibited statistically significant inhibition of leukocyte chemotaxis, 4 patients revealed normal function and the other one patients showed elevated leukocyte chemotaxis. Four of the 8 patients in chemotaxis dysfunction showed significant inhibition of random migration and chemotaxis dysfunction both. Two of these 4 patients exhibited random migration impairment, elevation of C.D.I. and chemotaxis dysfunction. The results indicated that the progression of rapidly progressive periodontitis was influenced by the leukocyte chemotaxis dysfunction, and half of these dysfunction was associated with cell-defect of leukocyte.

The author surveyed on the maxillary median diastema of 1,686(male; 850, female; 836) 'H' and 'K' primary school children aged from 6 to 13. The results were as follows : 1. The prevalence of the maxillay median diastema was 12.6% in male, 7.9% in female and 10.3% in both sexes. 2. The prevalence of the maxillary median diastema showed the highest rate in 9 years old boys and 8 years old girls, and it showed decreasing tendency according to increasing age. 3. The prevalence of mesiodens was 0.6% and boys had higher rate than girls. 4. Mean value of 'Frenum Distance' was 5.8mm in male, 5.7mm in female and mean value of 'Divergent Degree' was 2.0mm in male, 1.6mm in female.