Restorative Dentistry and Endodontics
- Volume 12 Issue 1
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- Pages.7-24
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- 1986
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
AN EXPERIMENTAL STUDY ON PHYSICAL PROPERTIES OF VARIOUS POSTERIOR RESTORATIVE COMPOSITE RESINS
수종(數種) 구치부(臼齒部) 충전용(充塡用) 복합(複合)레진의 물리적(物理的) 성질(性質)에 관(關)한 실험적(實驗的) 연구(硏究)
- Park, Sun-Jae (Department of Operative, Division of Dentistry, Kyung Hee University) ;
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Park, Sang-Jin
(Department of Operative, Division of Dentistry, Kyung Hee University) ;
- Min, Byang-Soon (Department of Operative, Division of Dentistry, Kyung Hee University) ;
-
Choi, Ho-Young
(Department of Operative, Division of Dentistry, Kyung Hee University)
- 박선재 (경희대학교 치과대학 보존학 교실) ;
-
박상진
(경희대학교 치과대학 보존학 교실) ;
- 민병순 (경희대학교 치과대학 보존학 교실) ;
-
최호영
(경희대학교 치과대학 보존학 교실)
- Published : 1986.12.31
Abstract
The purpose of this study was to observe the compressive strength, compressive fatigue strength, surface hardness, water sorption and solubility of eight different posterior restorative composite resins. Eight composite resins were tested for their strength of the compressive and compressive fatigue with prepared two different types of specimens (I and T-type) using a Instron universal testing machine (model No. 1332). The hardness was measured with a Knoop hardness tester (MVH-2, Tokyo) for each cylindrical specimen, 7mm in diameter and 5mm thick. The water sorption and solubility were evaluated with the prepared composite resin disks, 20mm in diameter and 1mm thick. The results were as follows: 1. The compressive strength, compressive fatigue strength and hardness were noticed to be Increased by increasing the volume content of filler. 2. The compressive strength was appeared to be independent on the type of specimen, but the compressive fatigue strength was found to be greatly influenced by the type of specimens. 3. The composite resins having higher compressive strength had also higher compressive fatigue limits. 4. The compressive fatigue limits at
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