HOME > Abstract
COMPARISON ON TENSILE BOND STRENGTH OF PERMANENT SOFT DENTURE LINERS BONDED TO THE DENTURE BASE RESIN 수종의 영구 탄성 이장재와 의치상용 레진간의 인장 결합 강도
Lae-Gyu Kim, Moon-kyu Chung, Soon-Ho Yim
김래규, 정문규, 임순호

For many  years  permanent  soft  denture  liners  has  been widely  used  in  dental  practice
directly or indirectly because of its function in absorbing and distributing the impact force. However,
it reveals problems such as lack of permanency and decreased bond strength in long term use.
The purpose of this study is to measure the bond strength and failure between denture base resin
and several permanent liners. Lucitone 199 was used as denture base resin with soft acrylic lin-
ers (Triad, Tokuso Rebase) and silicone elastomers (Tokuyama, Ufi Gel C) bonded to measure
the  tensile  strength  before  and  after  thermocycling.  The  thermocycling was  done  in  2000
cycles at 5℃, 26℃ and 55℃ and the measured  tensile strength values before and after thermocycling
were compared. The mode of failure was investigated in the separated specimens.
The results are as follows.
1. As to tensile strength, the strongest material is Tokuso Rebase followed by Triad, Tokuyama,
Ufi Gel C in before thermocycling and the order of Triad, Tokuso Rebase, Tokuyama, Ufi Gel
C in after thermocycling state. There was significant difference between the values of Triad,
Tokuso Rebase and Tokuyama, Ufi Gel C(p<0.05).
2. As to degree of displacement, Ufi Gel C showed most displacement with or without thermo-
cycling treatment and also the difference was significant with the other materials(p<0.05).  
3. As to comparisons before and after thermocycling, Tokuso Rebase and Tokuyama showed sig-
nificant difference in bond strength, whereas Triad and Tokuso Rebase showed significant dif-
ference in the degree of displacement(p<0.05).
4. In debonded specimens, Triad and Ufi Gel C showed adhesion failure and Tokuyama showed
cohesion failure. Both failures were observed in Tokuso Rebase with  adhesion failure up to 70%.
The results of this study showed that degree of bond strength between permanent soft denture
liner and denture base resin were variable.  There was a significant difference between soft acrylics
and silicone elastomers with regard to bond strength. Further research in improving bond strength
of widely used silicone elastomers and in developing the method of measuring bond strength between
denture base resin and the lining materials is needed.

* Keywords: Permanent soft denture liners, Dentur base resin, Tensile bond strength, Soft acrylic resin, Silicone elastomer

* 주요단어: