Bonding Cold-Curing Denture Base Acrylic Resin to Acrylic Resin Teeth

Korkmaz

The Journal of Adhesion

et al. 2009

This study compared tensile bond strengths between conventional compressionmolded heat (HC)-, auto (AP)-, and microwave-polymerized (MC) poly(methyl methacrylate)-based denture resins and a relatively new injection-molded, microwave-polymerized polyurethane based resin (MI) bonded to a highly cross-linked denture tooth. In the first part of the experiments, denture teeth were used as received. In the second part, they were treated with dichloromethane to see its effect on bonding of conventional denture bases (HCS and APS). Bond strength was tested in tension according to ADA specification No.15. The results showed that the HC group failed cohesively because of higher interface bonding (49.95 MPa) compared with those of the others (AP: 25.41 MPa; MC: 22.06 MPa; MI: 20.02 MPa). The application of dichloromethane improved bond strengths of HCS and APS groups (60.61 and 32.03 MPa, respectively). It was suggested that dichloromethane could be applied on the denture teeth ridge lap area prior to denture base processing to enhance adhesion between the tooth=resin.

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tensile Bond Strength of a Highly Cross-Linked Denture Tooth to the Compression-Molded and Injection-Molded Denture Base Polymers

Korkmaz

The Journal of Adhesion

et al. 2009

“…Some authors obtained that wetting the ridge-lap surface with methyl methacrylate monomer increased bond strength between denture tooth and acrylic resin. [24][25][26] However, Spratley found that wetting the ridge-lap surface with methyl methacrylate monomer did not significantly change bond strength. 27 In addition, Morrow . 28 concluded that using methyl methacrylate monomer for wetting the ridge-lap surface of plastic teeth significantly decreased bond strength.…”

Section: Discussionmentioning

confidence: 99%

Assessment of tensile strength between base-repair materials and porcelain teeth subjected to different surface treatment

Alkurt¹,

Duymuş²,

Gündoğdu³

2018

Yeditepe J Dent

SUMMARY Aim:The purpose of study is to assess the tensile strength between porcelain teeth and two different denture base (polyamide and heat-polymerized acrylic), a repair material (auto-polymerizing acrylic) after different types of surface treatment. Materials and Methods: Total of 63 same form and color mandibular right first molar porcelain denture teeth were used. The first molar porcelain denture teeth were separated into 3 material groups; Group 1: Heat-polymerized (HP), Group 2: Autopolymerizing (AP), and Group 3: Polyamide (PA) (n=21). Then, all material groups were divided into 3 subgroups (n=7) representing different surface treatment method; Control, Airborne abrasion, Er: YAG laser. A universal testing machine was used for determining the tensile bond strength (MPa) of the porcelain denture teeth to surface treated denture base and repair materials. The crosshead speed was set of 0.5 mm/min. Two-way ANOVA and post-hoc Tukey's HSD was used for statically analyses (α=0.05). The effects of the surface treatment were observed by scanning electron microscopy (SEM). Results: The polyamide (PA) has significantly higher (p< 0.05) tensile bond strength than the Heat-polymerized (HP) and Auto-polymerizing acrylic (AP). Polyamide (PA) with laser surface treatment (9.89 MPa) showed highest tensile bond strength. The lowest tensile bond strength was determined control group (6.38 MPa) of auto-polymerizing (AP). Surface treatments showed no significant difference. Conclusion: Superior tensile strength was found polyamide denture base and different surface treatments not affect the tensile strength of porcelain teeth.

“…Therefore, some products include an adhesive material to aid in direct relines. The main component of adhesive materials for repair or reline using acrylic resin is usually dichloromethane (i.e., methylene chloride) (10)(11)(12)(13)15,18,19,22,23,27) or ethyl acetate (17,20,21,24,28). Both are organic, nonpolymerizable solvents that swell the surface and permit the acrylic resin to diffuse.…”

Section: Surface Treatments For Denture Base Resinmentioning

confidence: 99%

“…Adhesive techniques may also be useful in some aspects of removable prosthodontics, including chemical bonding of denture components. The effect of surface treatments on bond strength between repair or reline acrylic resin and a denture base resin has been evaluated (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26), and some clinical procedures using these treatments have been reported (27,28). It is well known that significantly greater force is necessary to separate acrylic denture base resin or repair resin from metal frameworks that have been treated with metal conditioners (29-36).…”

Section: Introductionmentioning

confidence: 99%

Review of adhesive techniques used in removable prosthodontic practice

Shimizu

Takahashi

2012

J Oral Sci

There are several benefits in using adhesive technique in removable prosthodontics as well as fixed prosthodontics. Previous studies have examined denture-base surface treatments that improve bond strength between a denture base resin and autopolymerizing repair resin. Dichloromethane and ethyl acetate are organic solvents that swell the denture base surface, thereby permitting diffusion of the acrylic resin. The optimal treatment duration is 5-10 s for dichloromethane and 120 s for ethyl acetate. It was reported that the bond durability of dichloromethane was superior to that of ethyl acetate. Bonding between metal components and the denture base resin has an important role in the longevity of removable prostheses. The combination of metal conditioners and alumina air-abrasion is effective in fabricating and repairing removable dentures. Acidic monomers (4-META and MDP) are appropriate for base metal alloys, including Co-Cr alloy and titanium alloy, while thione monomers (MTU-6 and VBATDT) are suitable for noble metal alloys such as gold alloy and silverpalladium-copper-gold (Ag-Pd-Cu-Au) alloy. As an alternative to conventional restorations, resin-bonded restorations can provide precisely parallel guide planes with well-made rest seats. Careful consideration should be paid to stabilizing loosened teeth by fixing them with resin-bonded splints or fixed partial dentures. (J Oral Sci 54, 205-211, 2012)