In order to know how to master the dental laboratory techinique (D.L.T.) and how to teach it, experimental study was undertaken taking 743 dental students and 254 students of dental technician school on trial.
Results obtained as follows :
I On the D.L.T.
1. D.L.T. is influenced by one's own disposition. Therefore, the abtitude tests must be given for the dental applicants. Penmanship with Japanese brash and drawing pictures are recommended as the best method of abtitude tests, because they have an intimate connection with D.L.T.
2. In the training courses of D.L.T., it is necessary to intend to gain good quality of the workmanship than to complete it rapidly.
3. It must not be competed with another in finishing time.
4. 3-3.5 hour's laboratory work is the most effective. If continue moreover, workmanship of excellent quality will not be expected.
5. Even if we give enough time to the students, advanced quality of the workmanship can not keep up, unless they have not any interest and volition on it.
6. Physical fatique have little influence upon the quality of the workmanship.
7. When we continue to make a certain workmanship for a long time, declining quality appears earlier than losing speed.
8. Training effect of the same kind of workmanship appears after making 3 or 4 pieces.
9. When a student who got tired on his laboratory work is forced to continue, the result appears in declining quality.
10. If the works are simple or experienced one, shortening of finishing time appears, earlier than deterioration in continuous work in which same workmanships are made over again.
11. There is no difference between continuous training and intermittent training.
12. Efficiency of the work is rather superior in the afternoon to in the morning.
13. The more splendid in school records are, the more splendid in dental techinique are and vice versa.
14. D.L.T. has strikingly intimate relation with natural scientific subjects.
15. D.L.T. has no relation with physical rocords.
16. D.L.T. has not direct relation with the sense of sight.
17. Dividing the students into two groups, for instance one is skillfeel and another is unskillful in D.L.T., each group has common characteristics
18. The students skillful in D.L.T. is careful in everything and keep their sorroundings in good conditions (cleaning of the laboratory room and desk, full-equipped mashines, a.s.o) .
II On the teaching method of D.L.T.
1. How to instructe the student who is poor in quality for D.L.T.-
a) Such a student should be placed in a left or right side or at the front of the student having good quality.
b) The effect of such treatment depends upon the period of time and the distance between them.
c) But, it their making speed difference remarkably or they are making different workmanehip, we can not expect the effect of such treatment.
d) we had better give him self-confidence than point out his, disadvantages. At least we must not refer to his advantages positively.
2. The workmanship of the students is influenced by their life enviroment, especially economical instability.
3. Change of general feeling and physical fatigue exerts sometimes good and some-times bad effect upon one's workmanship.
4. To praise is a good stimulation for making excellent workmanship.
5. All the students are very sensitive to the feeling and behaviour of the instructors.
View full abstract