1998 Fiscal Year Final Research Report Summary

Study on Milling Ability of CAD/CAM System

Research Project

Project/Area Number	08672213
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Conservative dentistry
Research Institution	Tsurumi University
Principal Investigator	IWASE Hirokazu Tsurumi University School of Dental Medicine, Instructor, 歯学部, 助手 (70151735)
Co-Investigator(Kenkyū-buntansha)	YAMAMOTO Takatsugu Tsurumi University School of Dental Medicine, Instructor, 歯学部, 助手 (20260995)
Project Period (FY)	1996 – 1998
Keywords	CAD / CAM System / Ceramic Inlay / Diamond Disks
Research Abstract	Two diamond disks with different surface roughness were used. Ten cylindrical ceramics were reduced with each diamond disks. The time required for the same amount of reduction of ceramic block was measured as a milling efficacy. The wear of the diamond disk was also measured. The results were as follows : 1. For the coarse diamond disk, the milling efficacy did not drop after ten uses. On the other hand, the fine diamond disk showed rapid drop to approximate 40% comparing with a new diamond disk. 2. The wear loss after milling 10 blocks were 24.2 μm at the surface level and 22.5 μm at the edge level for the coarse diamond disk. The fine diamond disks showed wear of 3.0 μm at the surface and 1.2 μm at the edge. 3. By SEM observation of the coarse diamond disks, dull edge and loss of diamond particles were more remarkable than those of the fine disks.

(4 results)