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CC BY-NC-ND 4.0 · Eur J Dent 2019; 13(01): 064-068
DOI: 10.1055/s-0039-1688533
Original Article
Dental Investigation Society

Effects of Denture Base Thicknesses and Reinforcement on Fracture Strength in Mandibular Implant Overdenture with Bar Attachment: Under Various Acrylic Resin Types

Selen Tokgoz
1   Department of Prosthodontics, School of Dentistry, University of Istanbul, Istanbul, Turkey
,
Arda Ozdiler
1   Department of Prosthodontics, School of Dentistry, University of Istanbul, Istanbul, Turkey
,
Burc Gencel
2   Department of Prosthodontics, School of Dental Prosthesis Technologies, University of Istanbul, Istanbul, Turkey
,
Ergun Bozdag
3   Department of Mechanical Engineering, Laboratory of Biomechanics and Strength of Materials, Istanbul Technical University, Istanbul, Turkey
,
Gulbahar Isık-Ozkol
1   Department of Prosthodontics, School of Dentistry, University of Istanbul, Istanbul, Turkey
› Author Affiliations
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Publication History

Publication Date:
06 June 2019 (online)

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Abstract

Objective This study aimed to assess the effect of reinforcement, denture base thickness, and acrylic resin types on dynamic and static fracture strength in mandibular implant overdentures with bar attachment.

Materials and Methods One hundred and eight experimental mandibular implant overdentures with bar attachments were fabricated in three main groups, namely unreinforced (control: C), reinforced with unidirectional glass fibers (FR), and Co–Cr cast metal (MR). Each group included denture bases of 2-, 3-, and 4-mm thicknesses and produced with conventional (CA) and high-impact acrylic (HIA) resins. Specimens were thermocycled (5,000 times, 5–55°C) then subjected to a 400,000 cyclic load regime. Unbroken specimens were then loaded until fracture by a universal testing machine. Differences in mean fracture resistance among the groups were compared using the one-way analysis of variance (with post hoc Tukey's honestly significant difference test) and Student's t-tests (α = 0.05).

Results Fracture strength increased significantly when the denture base thickness was increased (p = 0.001). The 2-mm denture base thickness was not enough for reinforcement. The fracture strength of the FR groups was significantly higher than other groups for 3- and 4-mm thicknesses (p = 0.001). The fracture strength of the HIA resin was significantly higher than CA resin in FR groups (p = 0.029 and p = 0.001). MR groups showed the weakest fracture strength.

Conclusions The 2-mm denture base thickness had sufficient fracture strength without reinforcement and a positive relationship between acrylic resin thickness and fracture resistance was found.

Keywords

denture base thickness - dynamic loading - overdenture
 

  • References

  • 1 Jagger DC, Harrison A, Jandt KD. The reinforcement of dentures. J Oral Rehabil 1999; 26 (03) 185-194
    CrossrefPubMedGoogle Scholar
  • 2 Khuder T, Yunus N, Sulaiman E, Dabbagh A. Finite element analysis and clinical complications in mandibular implant-overdentures opposing maxillary dentures. J Mech Behav Biomed Mater 2017; 75: 97-104
    CrossrefPubMedGoogle Scholar
  • 3 Choi M, Acharya V, Berg RW. et al. Resinous denture base fracture resistance: effects of thickness and teeth. Int J Prosthodont 2012; 25 (01) 53-59
    PubMedGoogle Scholar
  • 4 Duncan JP, Freilich MA, Latvis CJ. Fiber-reinforced composite framework for implant-supported overdentures. J Prosthet Dent 2000; 84 (02) 200-204
    CrossrefPubMedGoogle Scholar
  • 5 Rodrigues AH. Metal reinforcement for implant-supported mandibular overdentures. J Prosthet Dent 2000; 83 (05) 511-513
    CrossrefPubMedGoogle Scholar
  • 6 Fajardo RS, Pruitt LA, Finzen FC, Marshall GW, Singh S, Curtis DA. The effect of E-glass fibers and acrylic resin thickness on fracture load in a simulated implant-supported overdenture prosthesis. J Prosthet Dent 2011; 106 (06) 373-377
    CrossrefPubMedGoogle Scholar
  • 7 Dong J, Ikebe K, Gonda T, Nokubi T. Influence of abutment height on strain in a mandibular overdenture. J Oral Rehabil 2006; 33 (08) 594-599
    CrossrefPubMedGoogle Scholar
  • 8 Takahashi T, Gonda T, Maeda Y. Influence of reinforcement on strains within maxillary implant overdentures. Int J Oral Maxillofac Implants 2015; 30 (06) 1327-1332
    Google Scholar
  • 9 Gonda T, Ikebe K, Dong J, Nokubi T. Effect of reinforcement on overdenture strain. J Dent Res 2007; 86 (07) 667-671
    Google Scholar
  • 10 Agha H, Flinton R, Vaidyanathan T. Optimization of fracture resistance and stiffness of heat-polymerized high impact acrylic resin with localized E-glass FIBER FORCE® reinforcement at different stress points. J Prosthodont 2016; 25 (08) 647-655
    CrossrefPubMedGoogle Scholar
  • 11 Im SM, Huh YH, Cho LR, Park CJ. Comparison of the fracture resistances of glass fiber mesh- and metal mesh-reinforced maxillary complete denture under dynamic fatigue loading. J Adv Prosthodont 2017; 9 (01) 22-30
    CrossrefPubMedGoogle Scholar
  • 12 Rached RN, de Souza EM, Dyer SR, Ferracane JL. Dynamic and static strength of an implant-supported overdenture model reinforced with metal and nonmetal strengtheners. J Prosthet Dent 2011; 106 (05) 297-304
    CrossrefPubMedGoogle Scholar
  • 13 Steiner M, Mitsias ME, Ludwig K, Kern M. In vitro evaluation of a mechanical testing chewing simulator. Dent Mater 2009; 25 (04) 494-499
    CrossrefPubMedGoogle Scholar
  • 14 Fontijn-Tekamp FA, Slagter AP, Van Der Bilt A. et al. Biting and chewing in overdentures, full dentures, and natural dentitions. J Dent Res 2000; 79 (07) 1519-1524
    CrossrefPubMedGoogle Scholar
  • 15 Favot LM, Berry-Kromer V, Haboussi M, Thiebaud F, Ben Zineb T. Numerical study of the influence of material parameters on the mechanical behaviour of a rehabilitated edentulous mandible. J Dent 2014; 42 (03) 287-297
    CrossrefPubMedGoogle Scholar
  • 16 Sekinishi T, Inukai S, Murakami N, Wakabayashi N. Influence of denture tooth thickness on fracture mode of thin acrylic resin bases: an experimental and finite element analysis. J Prosthet Dent 2015; 114 (01) 122-129
    CrossrefPubMedGoogle Scholar
  • 17 Heidari B, Firouz F, Izadi A, Ahmadvand S, Radan P. Flexural strength of cold and heat cure acrylic resins reinforced with different materials. J Dent (Tehran) 2015; 12 (05) 316-323
    Google Scholar
  • 18 Yoshida K, Takahashi Y, Shimizu H. Effect of embedded metal reinforcements and their location on the fracture resistance of acrylic resin complete dentures. J Prosthodont 2011; 20 (05) 366-371
    CrossrefPubMedGoogle Scholar
  • 19 Yoshida K, Takahashi Y, Hamanaka I, Kawaguchi T, Sasaki H, Shimizu H. Reinforcing effect of glass fiber-reinforced composite reinforcement on flexural strength at proportional limit of a repaired denture base resin. Acta Biomater Odontol Scand 2015; 1 (02) (04) 81-85
    CrossrefPubMedGoogle Scholar
  • 20 Vallittu PK. Curing of a silane coupling agent and its effect on the transverse strength of autopolymerizing polymethylmethacrylate-glass fibre composite. J Oral Rehabil 1997; 24 (02) 124-130
    CrossrefPubMedGoogle Scholar
  • 21 Hamouda IM, Beyari MM. Addition of glass fibers and titanium dioxide nanoparticles to the acrylic resin denture base material: comparative study with the conventional and high impact types. Oral Health Dent Manag 2014; 13 (01) 107-112
    PubMedGoogle Scholar
  • 22 Alla R, Sajjan S, Alluri V, Ginjupalli K, Padhya NU. Influence of fiber reinforcement on the properties of denture base resins. J Biomed Nanotechnol 2013; 4: 91-97
    Google Scholar
  • 23 Singh K, Sharma SK, Negi P, Kumar M, Rajpurohit D, Khobre P. Comparative evaluation of flexural strength of heat polymerized denture base resins after reinforcement with glass fibers and nylon fibers: an in vitro study. Adv Hum Biol 2016; 6: 91-94
    CrossrefGoogle Scholar
  • 24 Yu SH, Cho HW, Oh S, Bae JM. Effects of glass fiber mesh with different fiber content and structures on the compressive properties of complete dentures. J Prosthet Dent 2015; 113 (06) 636-644
    CrossrefPubMedGoogle Scholar
  • 25 Jagger DC, Jagger RG, Allen SM, Harrison A. An investigation into the transverse and impact strength of “high strength” denture base acrylic resins. J Oral Rehabil 2002; 29 (03) 263-267
    CrossrefPubMedGoogle Scholar
  • 26 Ajaj-Alkordy NM, Alsaadi MH. Elastic modulus and flexural strength comparisons of high-impact and traditional denture base acrylic resins. Saudi Dent J 2014; 26 (01) 15-18
    CrossrefPubMedGoogle Scholar
  • 27 Johnston EP, Nicholls JI, Smith DE. Flexure fatigue of 10 commonly used denture base resins. J Prosthet Dent 1981; 46 (05) 478-483
    CrossrefPubMedGoogle Scholar
  • 28 Gupta A, Tewari RK. Evaluation and comparison of transverse and impact strength of different high strength denture base resins. Indian J Dent Res 2016; 27 (01) 61-65
    CrossrefPubMedGoogle Scholar