도재파절 양상에 따른 수종의 도재 수복용 레진의 결합력에 관한 실험적 연구

Abstract

[한글]

저자는 국내에서 상용되고 있는 도재 수복용 레진인 All-bend (Bisco), Clearfil(Kuraray)과 ScotchFime(3M)들의 도재 및 금속과의 결합강도를 비교해 보기 위해 도재의 파절양상을 body층에서의 파절, opaque층에서의 파절, 금속면의 노출이 1/3, 2/3인 경우 및 금속면이 모두 노출된 경우의 다섯가지로 분류하여 시편을 제작한 후, 각 레진으로 제조회사의 지시에 따라 수복하고 나서, 24시간 동안 37℃ 증류수에 저장한 다음 5℃와 55℃에서 80초 oycle로 (각각 30초씩 교대 침수) 24시간동안 thermocycling 처리를 한 후(1080회 ) Universal testing machine(Instron 6022, U.S.A.) 에서 전단 결합강도를 측정하여 다음과 같은 결론을 얻었다.

1. 도재와 수복용 레진간의 결합력이 놓았고 금속면이 증가할수록 결합력이 감소했다.

2. Body층에서 파절된 경우 수복용 레진과의 결합력이 비교적 높았으며, 각수복용레진에 따른 결합력간에는 유의차가 없었다.

3. Opaque층에서 파절된 경우와 금속이 일부 노출된 경우All-bend와 Clearfil로 수복했을시에 비교적 높은 결합력을 나타냈으며, Scotchprime으로 수복한 경우에서 낮은 결합력을 보였다.

4. 금속면이 모두 노출된 경우 수복용 레진과의 결합력이 가장 낮았으며. 수복용 레진중 Scotchprime의 경우 결합력이 가장 낮았다.

5. 도재면에서 파절이 일어난 경우에는 도재층에서의 cohesive failure를 보였고 금속이 일부노출된 경우에는 cohesive/adhesive failue를 모두 나타냈고. 금속이 모두 노출된 경우에는 레진과 금속의 계면에서 adhesive failure를 보였다.

A comparison of the shear bond strength between three porcelain repair systems and

fractured surfaces of porcelain-fused-to-metal restorations

Jeung Won Choi , D.D.S.

Department of Dental Science, Graduate School, Yonsei University

(Directed by Assistant Professor Dong-Hoo Han, D.D.S.,M.S.D.,Ph.D.)

Although dental porcelain demonstrates lasting esthetic results, it suffers from

inherent brittle fractures. Various techniques arts materials for intraoral

porcelain repair has been Suggested.

This study investigated the in vitro shear strength of three porcelain repair

systems according o aspects of the Porcelain fractures.

The purpose of this study was o evaluate He shear bond strength of three

porcelain repair systems ( All-bond, Clearfil, Scotchprime ) acoording to

fractured surface of porcelain-fused-to-metal restorations. for this study

specimens were divided into five groups: group 1 represented fracture occurred at

body porcelain layer, group 2 represented fracture occurred at opaque porcelain

layer. group 3 represented fracture including 1/3 of metal exposure, group 4

represented fracture including 2/3 of meta1 exposure, and group 5 represented all

metal1 surface was exposed.

Specimens were stored in double deionized water(24Hr, 37℃) and thermocycling was

performed(24Hr, 1080cyc1es). and subjected to a shear force parallel to the repair

resin and porcelain interface by use of 8n Universal Testing Machine. The results

of this study were obtained as follows:

1. In group 1 and 2 bond strength was relatively high, and bond strength showing

reducing tendency as exposure of metal was increased.

2. In group 1, bond strength was relatively high, and no significant differences

in porcelain repair systems.

3. In group 2, 3 and 4 All-bond 7d Clearfil provided significantly higher bond

strength than scotchprime.

4. In group 5, bond strength was He lowest among all groups and especially in

case of Scothprime.

5. Cohesive failure was observed in group 1 and 2 adhesive failure was observed

in group 5, arts cohesive / adhesive failures were observes in group 3 and 4.

[영문]

Although dental porcelain demonstrates lasting esthetic results, it suffers from inherent brittle fractures. Various techniques arts materials for intraoral porcelain repair has been Suggested.

This study investigated the in vitro shear strength of three porcelain repair systems according o aspects of the Porcelain fractures.

The purpose of this study was o evaluate He shear bond strength of three porcelain repair systems ( All-bond, Clearfil, Scotchprime ) acoording to fractured surface of porcelain-fused-to-metal restorations. for this study specimens were divided into five groups: group 1 represented fracture occurred at body porcelain layer, group 2 represented fracture occurred at opaque porcelain layer. group 3 represented fracture including 1/3 of metal exposure, group 4 represented fracture including 2/3 of meta1 exposure, and group 5 represented all metal1 surface was exposed.

Specimens were stored in double deionized water(24Hr, 37℃) and thermocycling was performed(24Hr, 1080cyc1es). and subjected to a shear force parallel to the repair resin and porcelain interface by use of 8n Universal Testing Machine. The results

of this study were obtained as follows:

1. In group 1 and 2 bond strength was relatively high, and bond strength showing reducing tendency as exposure of metal was increased.

2. In group 1, bond strength was relatively high, and no significant differences in porcelain repair systems.

3. In group 2, 3 and 4 All-bond 7d Clearfil provided significantly higher bond strength than scotchprime.

4. In group 5, bond strength was He lowest among all groups and especially in case of Scothprime.

5. Cohesive failure was observed in group 1 and 2 adhesive failure was observed in group 5, arts cohesive / adhesive failures were observes in group 3 and 4.