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Computer-aided-design/computer-assisted-manufactured adhesive restoration of molars with a compromised cusp: effect of fiber-reinforced immediate dentin sealing and cusp overlap on fatigue strength.
J Esthet Restor Dent. 2012 Apr; 24(2):135-46.JE

Abstract

STATEMENT OF PROBLEM

Cracked teeth may traditionally require the use of complete coverage crowns. Alternative conservative treatments involve the use of adhesive inlays/onlays with the possibility of including a fiber patch to reinforce the cracked cusp.

PURPOSE

The purpose of this study was to evaluate the fatigue strength of compromised molars restored with computer-aided-design/computer-assisted-manufactured (CAD/CAM) composite resin inlays/onlays with and without fiber-reinforced immediate dentin sealing (IDS).

METHODS AND MATERIALS

Large mesio-occluso-distal preparations with cracked/undermined palatal cusps were simulated on 40 extracted maxillary molars. All teeth received IDS (Optibond FL, Kerr, Orange, CA, USA), and composite resin (Paradigm MZ100, 3M-ESPE, St. Paul, MN, USA) inlays (N = 20) and onlays (N = 20). A fiber patch (Ribbond, Ribbond Inc., Seattle, WA, USA) was applied in half of the preparations. Restorations were adhesively luted with pre-heated composite resin (Z100, 3-M ESPE) and submitted to cyclic isometric loading at 5 Hz, starting with a load of 50 N (5,000 cycles), followed by stages of 150, 300, 450, 600, 750, 900, and 1,050 N at a maximum of 25,000 cycles each. Specimens were loaded until fracture or to a maximum of 180,000 cycles. Groups were compared using the life table survival analysis.

RESULTS

Differences in survival probability were found (p = 0.04). The inlay group with fiber patch failed at an average load of 870 N, and none of the specimens withstood all 180,000 load cycles; survival rates of inlays and onlays without fibers, and onlays with fibers were 10, 30, and 50%, respectively.

CONCLUSIONS

Onlays (with or without fibers) increased the fatigue resistance of compromised molars in this in vitro study.

Authors+Show Affiliations

Division of Restorative Sciences, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, CA magne@usc.edu, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22524722

Citation

Magne, Pascal, et al. "Computer-aided-design/computer-assisted-manufactured Adhesive Restoration of Molars With a Compromised Cusp: Effect of Fiber-reinforced Immediate Dentin Sealing and Cusp Overlap On Fatigue Strength." Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], vol. 24, no. 2, 2012, pp. 135-46.
Magne P, Boff LL, Oderich E, et al. Computer-aided-design/computer-assisted-manufactured adhesive restoration of molars with a compromised cusp: effect of fiber-reinforced immediate dentin sealing and cusp overlap on fatigue strength. J Esthet Restor Dent. 2012;24(2):135-46.
Magne, P., Boff, L. L., Oderich, E., & Cardoso, A. C. (2012). Computer-aided-design/computer-assisted-manufactured adhesive restoration of molars with a compromised cusp: effect of fiber-reinforced immediate dentin sealing and cusp overlap on fatigue strength. Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], 24(2), 135-46. https://doi.org/10.1111/j.1708-8240.2011.00433.x
Magne P, et al. Computer-aided-design/computer-assisted-manufactured Adhesive Restoration of Molars With a Compromised Cusp: Effect of Fiber-reinforced Immediate Dentin Sealing and Cusp Overlap On Fatigue Strength. J Esthet Restor Dent. 2012;24(2):135-46. PubMed PMID: 22524722.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Computer-aided-design/computer-assisted-manufactured adhesive restoration of molars with a compromised cusp: effect of fiber-reinforced immediate dentin sealing and cusp overlap on fatigue strength. AU - Magne,Pascal, AU - Boff,Luís L, AU - Oderich,Elisa, AU - Cardoso,Antônio C, Y1 - 2011/06/08/ PY - 2012/4/25/entrez PY - 2012/4/25/pubmed PY - 2012/10/10/medline SP - 135 EP - 46 JF - Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] JO - J Esthet Restor Dent VL - 24 IS - 2 N2 - STATEMENT OF PROBLEM: Cracked teeth may traditionally require the use of complete coverage crowns. Alternative conservative treatments involve the use of adhesive inlays/onlays with the possibility of including a fiber patch to reinforce the cracked cusp. PURPOSE: The purpose of this study was to evaluate the fatigue strength of compromised molars restored with computer-aided-design/computer-assisted-manufactured (CAD/CAM) composite resin inlays/onlays with and without fiber-reinforced immediate dentin sealing (IDS). METHODS AND MATERIALS: Large mesio-occluso-distal preparations with cracked/undermined palatal cusps were simulated on 40 extracted maxillary molars. All teeth received IDS (Optibond FL, Kerr, Orange, CA, USA), and composite resin (Paradigm MZ100, 3M-ESPE, St. Paul, MN, USA) inlays (N = 20) and onlays (N = 20). A fiber patch (Ribbond, Ribbond Inc., Seattle, WA, USA) was applied in half of the preparations. Restorations were adhesively luted with pre-heated composite resin (Z100, 3-M ESPE) and submitted to cyclic isometric loading at 5 Hz, starting with a load of 50 N (5,000 cycles), followed by stages of 150, 300, 450, 600, 750, 900, and 1,050 N at a maximum of 25,000 cycles each. Specimens were loaded until fracture or to a maximum of 180,000 cycles. Groups were compared using the life table survival analysis. RESULTS: Differences in survival probability were found (p = 0.04). The inlay group with fiber patch failed at an average load of 870 N, and none of the specimens withstood all 180,000 load cycles; survival rates of inlays and onlays without fibers, and onlays with fibers were 10, 30, and 50%, respectively. CONCLUSIONS: Onlays (with or without fibers) increased the fatigue resistance of compromised molars in this in vitro study. SN - 1708-8240 UR - https://www.unboundmedicine.com/medline/citation/22524722/Computer_aided_design/computer_assisted_manufactured_adhesive_restoration_of_molars_with_a_compromised_cusp:_effect_of_fiber_reinforced_immediate_dentin_sealing_and_cusp_overlap_on_fatigue_strength_ L2 - https://doi.org/10.1111/j.1708-8240.2011.00433.x DB - PRIME DP - Unbound Medicine ER -