The role of surface treatments on the bond between acrylic denture base and teeth

Abstract

The aim of this study was to compare the bond strength between acrylic denture base and teeth subjected to 6 surface treatments. Ninety-six specimens were made with poly(methylmethacrylate) teeth bonded to a microwave-polymerized acrylic denture base material. The specimens were distributed into 6 groups (n=16) according to surface treatments: CT - no treatment (control); MN - methylmethacrylate monomer etching; AO - 50-microm-particle aluminum oxide air abrasion; BR - glaze removal with a round bur; ST - surface grinding with an aluminum oxide abrasive stone; group CV - cavity preparation (diatorics). The control and surface-treated groups were subjected to a compressive load at 45 masculine angle to the long axis of the teeth. Data were analyzed by one-way ANOVA, followed by Scheffé's test (p<0.05). Bond strength means and (SD) in kgf for groups were: CT: 18.19 (7.14), MN: 18.34 (5.28), AO: 23.82 (5.40), BR: 23.30 (4.79), ST: 25.39 (7.80) and CV: 17.48 (7.17). There was statistically significant difference (p=0.037997) only between ST and CV. In conclusion, ridge lap surface grinding with an aluminum oxide abrasive stone provided the highest bond strength, though it differed significantly only when compared to diatorics. The other surface treatments provided similar bond between the acrylic denture base and teeth.

Bonding of acrylic denture teeth to MMA/PMMA and light-curing denture base materials: The role of conditioning liquids

“…41,49 Hence, the teeth were ground using 150 grit abrasive paper to simulate cutting of the bonding surface with a medium to rough carbide bur. 22,49,50 Gross-mechanical retentions were applied only for Eclipse, as a specific conditioning liquid is not available in Germany (K.D. Brunner, Degudent, personal communication).…”

<p>Kekuatan ikat geser gigi artifisial akrilik dan porselen pada tiga macam basis gigi tiruan nilon termoplastik</p><p>The shear bond strength of acrylic and porcelain teeth in three types of thermoplastic nylon denture bases</p>

“…18 Beberapa sistem retensi telah diusulkan dalam beberapa penelitian sebelumnya seperti, makromekanikal (pin atau diatoric holes), mikromekanikal (high-energy abrasion) dan metode adhesif kimia (pengaplikasian bahan silane). 6,14,[19][20][21][22][23][24] Penelitian terdahulu telah menyarankan untuk membuat perlakuan yang berbeda pada gigi artifisial sebelum dilekatkan pada basis gigi tiruan. Penelitian lainnya juga menetapkan sebuah protokol untuk mengurangi kegagalan ikat antara gigi artifisial dengan basis gigi tiruan.…”

“…dapat memengaruhi perbedaan nilai kekuatan ikat geser antar kelompok. 14 Hal ini juga dijelaskan oleh Bragaglia et al 23 yang menyatakan bahwa bentuk t-shaped diatoric holes dapat menyebabkan kegagalan bahan basis gigi tiruan. Selain itu, kegagalan ini dapat disebabkan oleh ketajaman batas t-shaped diatoric holes yang mengakibatkan adanya konsentrasi stress pada area tersebut.…”

“…Selain itu, kegagalan ini dapat disebabkan oleh ketajaman batas t-shaped diatoric holes yang mengakibatkan adanya konsentrasi stress pada area tersebut. 14,23 Nilai kekuatan ikat geser yang paling baik terdapat pada kelompok gigi artifisial insisivus sentralis rahang atas baik akrilik maupun porselen dengan bahan basis gigi tiruan nilon termoplastik Valplast™ dan kelompok dengan nilai kekuatan ikat geser terkecil terdapat pada kelompok gigi artifisial insisivus sentralis baik akrilik maupun porselen dengan bahan basis gigi tiruan nilon termoplastik Biotone™. Hal ini dapat disebabkan karena adanya perbedaan sifat mekanis pada bahan basis gigi tiruan yang dipakai, yaitu modulus elastisitasnya.…”

The Effect of Autopolymerizing Acrylic Resin Thickness on the Bond Strength of a Repaired Denture Tooth

“…Adding mechanical retention to the denture base acrylic resin has also been investigated. Removing the glazed surface of the ridge lap portion of the denture tooth with air abrasion or grinding likely increases the bond strength of the acrylic resin denture tooth to the acrylic resin denture base . Other techniques include adding retentive grooves, a diatoric recess, and a mechanical “cingulum ledge lock” to improve bonding strength strength …”