Abstract:Background
This study aimed to demonstrate that the material of the occlusal splint can be chosen according to the needs of individual patients and contribute to the knowledge of the wear rate of these materials.
Methods
In this study, four occlusal splint materials (Sr Ivocap Heat Cured, Valplast, SR Ivocap Elastomer and Eclipse) and three antagonists (natural tooth enamel, inCoris TZI and IPS e.max Press ceramic materials) were used. Each wear test was performed using a chewing simulator (n = 16; test load:… Show more
“…To date, there are variety of commercial materials besides PMMA that are available for fabricating occlusal splints including polyamide resin, ethylene vinyl acetate, polycarbonate, urethane dimethacrylate. Previous studies have reported different wear resistance patterns with different occlusal splint materials [ 14 , 25 , 26 ]. In addition, fabrication methods have also shown to produce an impact on the wear resistance of occlusal splint materials.…”
Section: Discussionmentioning
confidence: 99%
“…Cycle frequency was programmed for 1.42 Hz and temperature of the simulator chamber was set at 25 °C [ 12 ]. Half of the dentin-exposed tooth specimens ( n = 6) were tested at 30,000 loading cycles, while the other half at 60,000 loading cycles to resemble different number of bruxism cycles in bruxing patients [ 13 , 14 ]. Fig.…”
Objectives
To compare the surface wear rate between polymethyl methacrylate (PMMA)-based occlusal splints and opposing dentin-exposed teeth in bruxism simulating models.
Materials and methods
PMMA-based occlusal splints and extracted premolars were tested on a chewing stimulator at 30,000 or 60,000 cycles. Dentin wear was measured under a stereomicroscope and PMMA wear was determined with an optical profilometer. In addition, wear surface topography was assessed and quantified by scanning electron microscopy (SEM).
Results
Wear rate of PMMA was significantly greater (11 times) than that of dentin specimens at 60,000 cycles, though these findings were not observed at 30,000 cycles. When comparing wear rates within each group at different duration cycles, PMMA surfaces exhibited an average wear rate 1.4 times higher with high duration cycles, while dentin surfaces displayed a marginal decrease in wear. In SEM micrographs, PMMA surfaces displayed more wear abrasion lines with higher duration cycles. However, dentin surfaces did not exhibit major differences between low and high duration cycles.
Conclusion
Wear rate on PMMA-based occlusal splints remarkably increases upon high chewing cycles mimicking bruxism comparing with the rate on dentin. Hence, it is reasonable for bruxing patients to wear single-arch PMMA-based occlusal splints to protect opposing dentin-exposed teeth.
“…To date, there are variety of commercial materials besides PMMA that are available for fabricating occlusal splints including polyamide resin, ethylene vinyl acetate, polycarbonate, urethane dimethacrylate. Previous studies have reported different wear resistance patterns with different occlusal splint materials [ 14 , 25 , 26 ]. In addition, fabrication methods have also shown to produce an impact on the wear resistance of occlusal splint materials.…”
Section: Discussionmentioning
confidence: 99%
“…Cycle frequency was programmed for 1.42 Hz and temperature of the simulator chamber was set at 25 °C [ 12 ]. Half of the dentin-exposed tooth specimens ( n = 6) were tested at 30,000 loading cycles, while the other half at 60,000 loading cycles to resemble different number of bruxism cycles in bruxing patients [ 13 , 14 ]. Fig.…”
Objectives
To compare the surface wear rate between polymethyl methacrylate (PMMA)-based occlusal splints and opposing dentin-exposed teeth in bruxism simulating models.
Materials and methods
PMMA-based occlusal splints and extracted premolars were tested on a chewing stimulator at 30,000 or 60,000 cycles. Dentin wear was measured under a stereomicroscope and PMMA wear was determined with an optical profilometer. In addition, wear surface topography was assessed and quantified by scanning electron microscopy (SEM).
Results
Wear rate of PMMA was significantly greater (11 times) than that of dentin specimens at 60,000 cycles, though these findings were not observed at 30,000 cycles. When comparing wear rates within each group at different duration cycles, PMMA surfaces exhibited an average wear rate 1.4 times higher with high duration cycles, while dentin surfaces displayed a marginal decrease in wear. In SEM micrographs, PMMA surfaces displayed more wear abrasion lines with higher duration cycles. However, dentin surfaces did not exhibit major differences between low and high duration cycles.
Conclusion
Wear rate on PMMA-based occlusal splints remarkably increases upon high chewing cycles mimicking bruxism comparing with the rate on dentin. Hence, it is reasonable for bruxing patients to wear single-arch PMMA-based occlusal splints to protect opposing dentin-exposed teeth.
“…A quantidade de corpos de prova destinados aos testes tribológicos, as dimensões da área (10 mm²) e espessura (3,3 mm), assim como a inclusão em acrílico, foram determinadas com base em estudos prévios 25,[28][29][30] .…”
Section: Microdureza Superficial E Perfil De Desgasteunclassified
“…O acabamento e polimento superficial reduzem as irregularidades superficiais do material, possivelmente melhorando a longevidade e, consequente, a resistência ao desgaste do mesmo, como evidenciado em estudos prévios (25,28,29), onde superfícies mais rugosas apresentaram maior perda de volume quando submetidas aos testes tribológicos.…”
Section: Microdureza Superficial E Perfil De Desgasteunclassified
“…Pacientes com disfunção temporomandibular muitas vezes são bruxômanos 1 , onde o uso das placas oclusais rígidas preserva a estrutura dentária do desgaste oclusal parafuncional, sendo primordial que o material utilizado na confecção das placas oclusais possua resistência ao desgaste de tais forças oclusais oblíquas [24][25][26][27][28][29][30][31][32] .…”
Ao meu orientador, Prof. Dr. Carlos Eduardo Francci, pelo voto de fé na realização deste trabalho. Agradeço pela paciência e encorajamento frente aos desafios profissionais e pessoais. Ao meu coorientador, Prof. Dr. Guilherme de Siqueira Ferreira Anzaloni Saavedra, pelo direcionamento e suporte nos momentos mais difíceis de uma trajetória de mais de dez anos. Ao Prof. Dr. Hilton Riquieri por incentivar o primeiro passo deste trabalho. Ao Prof. Ivan Rudek pelas contribuições ímpares ao trabalho. À Profa. Dra. Tais Scaramucci Forlin pela receptividade e auxílio na execução do trabalho. Ao técnico de laboratório do Departamento de Biomateriais e Biologia Oral, Antônio Carlos Lascala, pelo auxílio imensurável ao longo da execução laboratorial de todo o trabalho.À técnica de laboratório do Departamento de Biomateriais e Biologia Oral Elisângela Chinen, por auxiliar de forma essencial nas análises do trabalho.
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