Comparison of wear between occlusal splint materials and resin composite materials

Abstract

Tooth wear in bruxing patients often results in a need for treatment with composite restorations. In some cases, bruxing patients receive an occlusal splint as a protective means as well. However, the wear between these opposing materials has not been investigated yet. The aim of this in vitro study was to assess the wear of different splint materials against resin composite materials. A two-body wear test was conducted using the ACTA wear machine. The materials selected for this study were three composites used for direct restorations (Filtek Z250, CLEARFIL AP-X, and Filtek Supreme XT) and four occlusal splints materials, viz. a polyamide resin (ThermoSens) an conventional (hand-processed), milled and printed polymethylmethacrylate (PMMA). As antagonistic materials, stainless steel, Filtek Supreme XT and CLEARFIL AP-X were used. The wear rate of the seven materials was determined after 200 000 cycles, using a profilometry. The rates were analysed using two-way ANOVA and post hoc Tukey's tests. The wear rates were significantly higher for the conventional and milled PMMA materials than for all other materials (P < .001). The wear rates of printed PMMA and the polyamide resin were comparable to composite wear rates. The antagonist materials have minor or no influence on the amount of wear of the various splint materials (P < .001). In conclusion, different splint materials yielded different wear rates for all antagonist materials tested. Keeping in mind that this study is an experimental in vitro study, this finding enables practitioners to choose the splint material necessary according to their patients' needs.

Influence of Occlusal Splint on Mandibular Movements in Patients with Bruxism: a Comparative Pilot Study

“…Although minimal, the established changes have confirmed the fact that the CR position is not a fixed, static position, but that the CR is a range of possible positions dependent on the symmetrical mandibular muscle activity with a minimum level of muscle tone ( 27 ). In the interpretation of the results of larger condylar displacement in the CR in the experimental group, a change in the occlusal surface of the splint, irrespective of its fabrication material, should also be considered due to wear caused by parafunctional movements ( 33 ). A study comparing the effect of occlusal splints on the condyle position in subjects with TMD and asymptomatic control group showed that splints influenced the condyle position to a greater extent in the experimental group than in the control group after 10 weeks ( 34 , 35 ).…”

Influence of the ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316l stainless steel

“…Tiainen [20] studied tribological behaviour of PMMA in contact with different materials (4/10 MPa loads; pin-onplate reciprocating tests) and reported wear factors of PMMA as: 33/2510 -6 mm 3 /Nm and 0.086/0.04710 -6 mm 3 /Nm for CoCrMo and DLC-coated pins, respectively. Recent studies of PMMA wear reported wide ranges of wear rates depending on the PMMA preparation procedure [5,14]. Wear factors of the order of 710 -6 mm 3 /Nm can be found in the literature for dry sliding of a steel pin on PMMA, but without details on the steel type or test conditions [5,14].…”

“…Recent studies of PMMA wear reported wide ranges of wear rates depending on the PMMA preparation procedure [5,14]. Wear factors of the order of 710 -6 mm 3 /Nm can be found in the literature for dry sliding of a steel pin on PMMA, but without details on the steel type or test conditions [5,14]. Wear factors obtained in our study were in the range of 25-9010 -6 mm 3 /Nm for dry tests and 90-13010 -6 mm 3 /Nm for wet…”

“…Poly(methyl methacrylate) (PMMA) [(C5O2H8)n] based bone cements belong to a group of synthetic nondegradable, biocompatible polymeric hard biomaterials. Acrylic bone cements have versatile applications such as: cemented hip implants [1], spinal treatments [2], custom made bone implants [3], dental applications like orthodontic brackets [4] and occlusal splints [5]. PMMA is an isotropic, elasto-visco-plastic solid and amorphous/glassy polymer material.…”

“…Friction and wear mechanisms are largely unexplored in the case of PMMA bone cements, even though there are several studies related to specific aspects, such as corrosion influence on the friction behaviour or the effects of oscillatory motion at small amplitude, during the contact between AISI 316L steel and PMMA [12]. There are several studies on the friction coefficient dependence on hardness, surface roughness and chemical reaction of AISI 316L steel for bone screws [13] as well as on wear of occlusal splints and PMMA in dentistry [5,14]. Still, formation of a third body between articulating surfaces as well as different superposing influences such as that of a corrosive environment have to be included in considerations.…”