J Korean Acad Conserv Dent.  2009 Nov;34(6):467-476. 10.5395/JKACD.2009.34.6.467.

Real-time measurement of dentinal tubular fluid flow during and after amalgam and composite restorations

Affiliations
  • 1Department of Conservative Dentistry, School of Dentistry, Seoul National University, Korea. inboglee@snu.ac.kr
  • 2Department of Dental Biomaterials, School of Dentistry, Seoul National University, Korea.

Abstract

The aim of this study was to measure the dentinal tubular fluid flow (DFF) during and after amalgam and composite restorations. A newly designed fluid flow measurement instrument was made. A third molar cut at 3 mm apical from the CEJ was connected to the flow measuring device under a hydrostatic pressure of 15 cmH2O. Class I cavity was prepared and restored with either amalgam (Copalite varnish and Bestaloy) or composite (Z-250 with ScotchBond MultiPurpose: MP, Single Bond 2: SB, Clearfil SE Bond: CE and Easy Bond: EB as bonding systems). The DFF was measured from the intact tooth state through restoration procedures to 30 minutes after restoration, and re-measured at 3 and 7days after restoration. Inward fluid flow (IF) during cavity preparation was followed by outward flow (OF) after preparation. In amalgam restoration, the OF changed to IF during amalgam filling and slight OF followed after finishing. In composite restoration, application CE and EB showed a continuous OF and air-dry increased rapidly the OF until light-curing, whereas in MP and SB, rinse and dry caused IF and OF, respectively. Application of hydrophobic bonding resin in MP and CE caused a decrease in flow rate or even slight IF. Light-curing of adhesive and composite showed an abrupt IF. There was no statistically significant difference in the reduction of DFF among the materials at 30 min, 3 and 7 days after restoration (P > 0.05).

Keyword

Dentinal tubular fluid flow; Amalgam; Composite; Bonding system

MeSH Terms

Adhesives
Bisphenol A-Glycidyl Methacrylate
Dentin
Hydrostatic Pressure
Molar, Third
Paint
Resin Cements
Tooth
Tooth Cervix
Adhesives
Bisphenol A-Glycidyl Methacrylate
Resin Cements

Figure

  • Figure 1 Schematic diagram of the dentinal tubular fluid flow measurement system.

  • Figure 2 Consecutive DFF during amalgam restoration. Upward movement (+) vs time on graph indicates outward DFF, whereas downward movement (-) indicates inward DFF. CP: cavity preparation; V: varnish application; ga: gentle air stream; AF: amalgam filling.

  • Figure 3 (a) Consecutive DFF during composite restoration with MP. (b) Magnified view of consecutive DFF during bonding procedure of MP. Upward movement (+) vs time on graph indicates outward DFF, whereas downward movement (-) indicates inward DFF. CP: cavity preparation; LC: light curing; C1: first layer filling of composite; C2: second layer filling of composite; E: acid-etching; r: rinse; d: blot-dry; P: primer application; ga: gentle air; A: adhesive application.

  • Figure 4 (a) Consecutive DFF during composite restoration with SB. (b) Magnified view of consecutive DFF during bonding procedure of SB. Upward movement (+) vs time on graph indicates outward DFF, whereas downward movement (-) indicates inward DFF. CP: cavity preparation; LC: light curing; C1: first layer filling of composite; C2: second layer filling of composite; E: acid-etching; r: rinse; d: blot-dry; sb: Single Bond application; ga: gentle air.

  • Figure 5 (a) Consecutive DFF during composite restoration with CE. (b) Magnified view of consecutive DFF during bonding procedure of CE. Upward movement (+) vs time on graph indicates outward DFF, whereas downward movement (-) indicates inward DFF. CP: cavity preparation; LC: light curing; C1: first layer filling of composite; C2: second layer filling of composite; SE: self-etching primer application; a: air-dry; A: adhesive application.

  • Figure 6 (a) Consecutive DFF during composite restoration with EB. (b) Magnified view of consecutive DFF during bonding procedure of EB. Upward movement (+) vs time on graph indicates outward DFF, whereas downward movement (-) indicates inward DFF. CP: cavity preparation; LC: light curing; C1: first layer filling of composite; C2: second layer filling of composite; eb: Easy Bond application; a: air-dry.


Cited by  1 articles

Real-time measurement of dentinal fluid flow during desensitizing agent application
Sun-Young Kim, Eun-Joo Kim, In-Bog Lee
J Korean Acad Conserv Dent. 2010;35(5):313-320.    doi: 10.5395/JKACD.2010.35.5.313.


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