Compressive and Diametral Tensile Strength of Titanium‐Reinforced Composites

Abstract

This article determines the compressive and diametral tensile strength of two titanium-reinforced composites (Bis-GMA-based), Ti-Core and Flexi-Flow cem with titanium and compares their strengths to dentin and commercially available core materials and cements. In addition scanning electron microscope (SEMI photographs were taken of Ti-Core and Flexi-Flow cem with titanium. Compressive and tensile loading was performed on a modifled universal testing apparatus. Ti-Core and Flexi-Flow cem with titanium were measured to have compressive strengths of 41,132 and 41,876 psi and tensile strengths of 5219 and 4930 psi, respectively.Statistically (ANOVA, one-way analysis of variance), these titanium-reinforced composites are stronger in compressive and tensile strength than Ketac-Silver, Flecks zinc cement, Durelon, Ketac-Cem, and GC Miracle Mix. Both titaniumreinforced composite materials approach the compressive and diametral tensile strengths of dentin (43,100 and 6000 psi). SEMs revealed that the titanium was uniformly and homogeneously interspersed within the resin matrix of the material. he use of a composite resin restorative system to T restore teeth due to caries and/or fracture before placement of a crown restoration is well documented in dental literature.'-" Since the development of the dental restorative composite resin system (Bis-GMA-based) by Bowen, researchers have been trying to improve existing composite resin systems and alter their characteristics for improved clinical applications. Studies of fatigue associated with composite resins have shown that there is a strong correlation between fatigue and the compressive and diametral tensile strength of dental composite resin materials. 12.13 The relationship between fatigue and compressive and tensile strength seems to indicate that composite resins with higher compressive and tensile strength will withstand fatigue better and longer.I2 Therefore, a possible way for reducing failure associated with dental composite resins due to age and function is to improve the existing compressive and tensile strengths for these dental restorative materials.Many researchers have found that addition of fillers to resin systems can result in enhanced characteristics

Whisker-reinforced dental core buildup composites: Effect of filler level on mechanical properties

“…With the increase in the number of endodontically treated teeth, dentists now perform more core buildup restorations than ever before. [1][2][3][4][5][6] While many factors govern the clinical performance of these restorations, reported clinical failures are predominantly mechanical, [7][8][9] as the restorations need to withstand flexural and compressive stresses from chewing and parafunctions such as clenching and bruxing. Therefore, strength and toughness are important requirements for core buildup materials.…”

“…[4][5][6][10][11][12] Dental core materials include amalgam, glass ionomer cements, and resin composites. [7][8][9][10][11][12] Traditional and reinforced glass ionomer have also been used in core buildup procedures, but studies have suggested that, due to their low strength and toughness, they are not suitable for large core buildup procedures. 3,10,12 There is a widespread trend toward increased use of direct-filling resin composites as core buildup materials because they offer advantages including bonding capability and short setting time.…”

“…3,10,12 There is a widespread trend toward increased use of direct-filling resin composites as core buildup materials because they offer advantages including bonding capability and short setting time. 8 Contract grant sponsor: NIST Contract grant sponsor: ADAHF Certain commercial materials and equipment are identified to specify the experimental procedure. In no instance does such identification imply recommendation or endorsement by NIST or ADAHF or that the material or equipment identified is necessarily the best available for the purpose.…”

“…[21][22][23] Fracture resistance needs to be improved to reduce the failure rates of resin composite core buildups. 3,[7][8][9]11 A novel whisker filler system was recently developed for strengthening resin composites. 24 The whiskers used in these studies were single crystals possessing superior strength.…”

Avaliação longitudinal da resistência de união de pinos de fibra de vidro à dentina cimentados com quatro agentes cimentantes por meio do teste de push-out

“…Essas situações invariavelmente levam a uma grande perda de estrutura dentária e, conseqüentemente, à necessidade de confecção de restaurações totais para reabilitar a estética e a função. No entanto, para reconstruir a parte do remanescente coronário, os dentes tratados endodonticamente necessitam de um pino intrarradicular para dar ancoragem à restauração final, ao núcleo e ao remanescente dentinário (COHEN et al, 1992;STOCKTON, 1999;MORGANO;RODRIGUES;SABROSA, 2004).…”