Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser

Ali Obeidi, Michael Scott McCracken, Perng Ru Liu, Mark S. Litaker, Preston Beck, Firoz Rahemtulla

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background and Objective: Erbium lasers are potential tools to remove caries and dental hard tissue but bond strengths of composites to those preparations are reported to be lower than conventional methods. The purpose of this study was to evaluate the effect of mechanical excavation and/or chemical alteration on bond strength of composites to laser irradiated enamel and dentin. Materials and Methods: Seventy-two premolars were ground to obtain flat enamel (E, n = 36) or dentin (D, n = 36) surfaces in both buccal and lingual cusps, divided into: LaserExcavation (LEx), LaserNo-excavation (LNex), and Bur (B) groups. The laser groups were irradiated for 10 seconds by Er,Cr:YSGG laser [4.5 W, 60% air, 80% water (enamel) 3W, 60% air, 70% water (dentin)]. Irradiated surfaces in the excavation groups (Ex) were then mechanically smoothed with a dental excavator, prepared surfaces were then etched (37%H3PO 4) for 20 or 40 seconds (enamel) and 15 or 30 seconds (dentin), washed (20 seconds), adhesive was applied(Single Bond Plus), and light cured (20 seconds). A composite cylinder (Filtek Supreme Plus) formed, placed and light cured (40 seconds). The specimens were stored (37°C,48 hours), shear bond tested (1 mm/minute), and statistically analyzed (P < 0.05). Results: Mixed-model ANOVA showed significant differences between enamel (P = 0.0091) and between dentin groups (P = 0.0035). Tukey/Kramer showed mean shear bond strength (SBS ± SE) of EB40 (27.01 ± 2.38 MPa) was significantly higher than ELNoExc20 (14.39 ± 2.5 MPa) and ELExc40 (14.90 ± 2.28 MPa). Also DB30 (17.57 ± 1.67 MPa) and DLExc30 (18.6 ± 1.74 MPa) were significantly higher than DLNoExc15 (9.56 ± 1.86 MPa). Conclusion: Increasing the etching time up to 40 seconds or excavation of the laser prepared surface (but not the combination) may increase the bond strength to the level of conventional methods in enamel but excavation has a greater influence in dentin. Also the combination of both methods [excavation+longer etching time (30 seconds)] exhibit significantly better results in dentin. Mode of failure study showed mechanical excavation in both enamel and dentin can significantly reduce the cohesive failure in tooth structure.

Original languageEnglish (US)
Pages (from-to)454-462
Number of pages9
JournalLasers in Surgery and Medicine
Volume41
Issue number6
DOIs
StatePublished - Aug 1 2009

Fingerprint

Solid-State Lasers
Dentin
Dental Enamel
Lasers
Tooth
Air
Erbium
Light
Shear Strength
Water
Cheek
Bicuspid
Dental Caries
Tongue
Adhesives
Analysis of Variance

Keywords

  • Dentin
  • Enamel
  • Etching
  • Excavation
  • Laser
  • Shear bond

ASJC Scopus subject areas

  • Surgery
  • Dermatology

Cite this

Obeidi, A., McCracken, M. S., Liu, P. R., Litaker, M. S., Beck, P., & Rahemtulla, F. (2009). Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser. Lasers in Surgery and Medicine, 41(6), 454-462. https://doi.org/10.1002/lsm.20790

Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser. / Obeidi, Ali; McCracken, Michael Scott; Liu, Perng Ru; Litaker, Mark S.; Beck, Preston; Rahemtulla, Firoz.

In: Lasers in Surgery and Medicine, Vol. 41, No. 6, 01.08.2009, p. 454-462.

Research output: Contribution to journalArticle

Obeidi, A, McCracken, MS, Liu, PR, Litaker, MS, Beck, P & Rahemtulla, F 2009, 'Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser', Lasers in Surgery and Medicine, vol. 41, no. 6, pp. 454-462. https://doi.org/10.1002/lsm.20790
Obeidi A, McCracken MS, Liu PR, Litaker MS, Beck P, Rahemtulla F. Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser. Lasers in Surgery and Medicine. 2009 Aug 1;41(6):454-462. https://doi.org/10.1002/lsm.20790
Obeidi, Ali ; McCracken, Michael Scott ; Liu, Perng Ru ; Litaker, Mark S. ; Beck, Preston ; Rahemtulla, Firoz. / Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser. In: Lasers in Surgery and Medicine. 2009 ; Vol. 41, No. 6. pp. 454-462.
@article{f113a3e995ac464791cd22a321983b85,
title = "Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser",
abstract = "Background and Objective: Erbium lasers are potential tools to remove caries and dental hard tissue but bond strengths of composites to those preparations are reported to be lower than conventional methods. The purpose of this study was to evaluate the effect of mechanical excavation and/or chemical alteration on bond strength of composites to laser irradiated enamel and dentin. Materials and Methods: Seventy-two premolars were ground to obtain flat enamel (E, n = 36) or dentin (D, n = 36) surfaces in both buccal and lingual cusps, divided into: LaserExcavation (LEx), LaserNo-excavation (LNex), and Bur (B) groups. The laser groups were irradiated for 10 seconds by Er,Cr:YSGG laser [4.5 W, 60{\%} air, 80{\%} water (enamel) 3W, 60{\%} air, 70{\%} water (dentin)]. Irradiated surfaces in the excavation groups (Ex) were then mechanically smoothed with a dental excavator, prepared surfaces were then etched (37{\%}H3PO 4) for 20 or 40 seconds (enamel) and 15 or 30 seconds (dentin), washed (20 seconds), adhesive was applied(Single Bond Plus), and light cured (20 seconds). A composite cylinder (Filtek Supreme Plus) formed, placed and light cured (40 seconds). The specimens were stored (37°C,48 hours), shear bond tested (1 mm/minute), and statistically analyzed (P < 0.05). Results: Mixed-model ANOVA showed significant differences between enamel (P = 0.0091) and between dentin groups (P = 0.0035). Tukey/Kramer showed mean shear bond strength (SBS ± SE) of EB40 (27.01 ± 2.38 MPa) was significantly higher than ELNoExc20 (14.39 ± 2.5 MPa) and ELExc40 (14.90 ± 2.28 MPa). Also DB30 (17.57 ± 1.67 MPa) and DLExc30 (18.6 ± 1.74 MPa) were significantly higher than DLNoExc15 (9.56 ± 1.86 MPa). Conclusion: Increasing the etching time up to 40 seconds or excavation of the laser prepared surface (but not the combination) may increase the bond strength to the level of conventional methods in enamel but excavation has a greater influence in dentin. Also the combination of both methods [excavation+longer etching time (30 seconds)] exhibit significantly better results in dentin. Mode of failure study showed mechanical excavation in both enamel and dentin can significantly reduce the cohesive failure in tooth structure.",
keywords = "Dentin, Enamel, Etching, Excavation, Laser, Shear bond",
author = "Ali Obeidi and McCracken, {Michael Scott} and Liu, {Perng Ru} and Litaker, {Mark S.} and Preston Beck and Firoz Rahemtulla",
year = "2009",
month = "8",
day = "1",
doi = "10.1002/lsm.20790",
language = "English (US)",
volume = "41",
pages = "454--462",
journal = "Lasers in Surgery and Medicine",
issn = "0196-8092",
publisher = "Wiley-Liss Inc.",
number = "6",

}

TY - JOUR

T1 - Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG laser

AU - Obeidi, Ali

AU - McCracken, Michael Scott

AU - Liu, Perng Ru

AU - Litaker, Mark S.

AU - Beck, Preston

AU - Rahemtulla, Firoz

PY - 2009/8/1

Y1 - 2009/8/1

N2 - Background and Objective: Erbium lasers are potential tools to remove caries and dental hard tissue but bond strengths of composites to those preparations are reported to be lower than conventional methods. The purpose of this study was to evaluate the effect of mechanical excavation and/or chemical alteration on bond strength of composites to laser irradiated enamel and dentin. Materials and Methods: Seventy-two premolars were ground to obtain flat enamel (E, n = 36) or dentin (D, n = 36) surfaces in both buccal and lingual cusps, divided into: LaserExcavation (LEx), LaserNo-excavation (LNex), and Bur (B) groups. The laser groups were irradiated for 10 seconds by Er,Cr:YSGG laser [4.5 W, 60% air, 80% water (enamel) 3W, 60% air, 70% water (dentin)]. Irradiated surfaces in the excavation groups (Ex) were then mechanically smoothed with a dental excavator, prepared surfaces were then etched (37%H3PO 4) for 20 or 40 seconds (enamel) and 15 or 30 seconds (dentin), washed (20 seconds), adhesive was applied(Single Bond Plus), and light cured (20 seconds). A composite cylinder (Filtek Supreme Plus) formed, placed and light cured (40 seconds). The specimens were stored (37°C,48 hours), shear bond tested (1 mm/minute), and statistically analyzed (P < 0.05). Results: Mixed-model ANOVA showed significant differences between enamel (P = 0.0091) and between dentin groups (P = 0.0035). Tukey/Kramer showed mean shear bond strength (SBS ± SE) of EB40 (27.01 ± 2.38 MPa) was significantly higher than ELNoExc20 (14.39 ± 2.5 MPa) and ELExc40 (14.90 ± 2.28 MPa). Also DB30 (17.57 ± 1.67 MPa) and DLExc30 (18.6 ± 1.74 MPa) were significantly higher than DLNoExc15 (9.56 ± 1.86 MPa). Conclusion: Increasing the etching time up to 40 seconds or excavation of the laser prepared surface (but not the combination) may increase the bond strength to the level of conventional methods in enamel but excavation has a greater influence in dentin. Also the combination of both methods [excavation+longer etching time (30 seconds)] exhibit significantly better results in dentin. Mode of failure study showed mechanical excavation in both enamel and dentin can significantly reduce the cohesive failure in tooth structure.

AB - Background and Objective: Erbium lasers are potential tools to remove caries and dental hard tissue but bond strengths of composites to those preparations are reported to be lower than conventional methods. The purpose of this study was to evaluate the effect of mechanical excavation and/or chemical alteration on bond strength of composites to laser irradiated enamel and dentin. Materials and Methods: Seventy-two premolars were ground to obtain flat enamel (E, n = 36) or dentin (D, n = 36) surfaces in both buccal and lingual cusps, divided into: LaserExcavation (LEx), LaserNo-excavation (LNex), and Bur (B) groups. The laser groups were irradiated for 10 seconds by Er,Cr:YSGG laser [4.5 W, 60% air, 80% water (enamel) 3W, 60% air, 70% water (dentin)]. Irradiated surfaces in the excavation groups (Ex) were then mechanically smoothed with a dental excavator, prepared surfaces were then etched (37%H3PO 4) for 20 or 40 seconds (enamel) and 15 or 30 seconds (dentin), washed (20 seconds), adhesive was applied(Single Bond Plus), and light cured (20 seconds). A composite cylinder (Filtek Supreme Plus) formed, placed and light cured (40 seconds). The specimens were stored (37°C,48 hours), shear bond tested (1 mm/minute), and statistically analyzed (P < 0.05). Results: Mixed-model ANOVA showed significant differences between enamel (P = 0.0091) and between dentin groups (P = 0.0035). Tukey/Kramer showed mean shear bond strength (SBS ± SE) of EB40 (27.01 ± 2.38 MPa) was significantly higher than ELNoExc20 (14.39 ± 2.5 MPa) and ELExc40 (14.90 ± 2.28 MPa). Also DB30 (17.57 ± 1.67 MPa) and DLExc30 (18.6 ± 1.74 MPa) were significantly higher than DLNoExc15 (9.56 ± 1.86 MPa). Conclusion: Increasing the etching time up to 40 seconds or excavation of the laser prepared surface (but not the combination) may increase the bond strength to the level of conventional methods in enamel but excavation has a greater influence in dentin. Also the combination of both methods [excavation+longer etching time (30 seconds)] exhibit significantly better results in dentin. Mode of failure study showed mechanical excavation in both enamel and dentin can significantly reduce the cohesive failure in tooth structure.

KW - Dentin

KW - Enamel

KW - Etching

KW - Excavation

KW - Laser

KW - Shear bond

UR - http://www.scopus.com/inward/record.url?scp=67650561496&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67650561496&partnerID=8YFLogxK

U2 - 10.1002/lsm.20790

DO - 10.1002/lsm.20790

M3 - Article

VL - 41

SP - 454

EP - 462

JO - Lasers in Surgery and Medicine

JF - Lasers in Surgery and Medicine

SN - 0196-8092

IS - 6

ER -