Influence of ceramic veneer thickness and antagonist on impact stresses during dental trauma with and without a mouthguard assessed with finite element analysis
| Autor: | Antheunis Versluis, Daranee Tantbirojn, Gabriel Felipe de Bragança, Andomar Bruno Fernandes Vilela, Carlos José Soares, Priscilla Barbosa Ferreira Soares |
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| Rok vydání: | 2020 |
| Předmět: |
Dental Stress Analysis
Ceramics Materials science business.product_category medicine.medical_treatment Finite Element Analysis 03 medical and health sciences 0302 clinical medicine stomatognathic system Incisor medicine von Mises yield criterion Mouthguard Dental Enamel Orthodontics Dental trauma Enamel paint Antagonist Biomechanics 030229 sport sciences 030206 dentistry medicine.disease stomatognathic diseases medicine.anatomical_structure visual_art visual_art.visual_art_medium Mouth Protectors Veneer Stress Mechanical Oral Surgery business |
| Zdroj: | Dental Traumatology. 37:215-222 |
| ISSN: | 1600-9657 1600-4469 |
| DOI: | 10.1111/edt.12631 |
| Popis: | Background/aim Little is known about the effect of dental trauma and mouthguards (MG) on teeth with ceramic laminate veneers (CLV). The aim was to evaluate the influence of CLV thickness and the presence of a MG with and without antagonist tooth contact on impact stresses during dental trauma. Materials and methods Twelve 2D-finite element models of a head with maxillary structures and upper incisors, six with and six without antagonist tooth, were created in three CLV conditions: sound incisor (no CLV), 0.3 mm CLV, and 1.0 mm CLV. These were evaluated with and without a 4.0-mm ethylene-vinyl acetate MG, with and without an antagonist tooth. An impact analysis was performed in which the head frontally hits a rigid surface at a speed of 1 m/s (3.6 km/h). The results were analyzed using Critical modified von Mises (MPa). The mean of the 10% highest modified von Mises stresses in each structure was collected. Results MG presence substantially reduced impact stresses in the CLV and tooth structures. The contact of the antagonist tooth promoted better stress distribution and reduced the stress levels in the traumatized tooth. Critical stress areas were found in the palatal enamel, incisal enamel, labial cervical area, and enamel under the CLV for all models without MG. In the models with MG, the stresses reduced significantly. Critical modified von Mises stress showed that sound or prepared enamel experienced more critical impact stresses than 0.3 or 1.0-mm thick CLV. Conclusions The use of 4.0 mm EVA mouthguard reduced the impact stress levels in models with 0.3-mm CLV and 1.0-mm CLV, similar to a sound tooth. The contact of an antagonist tooth and the MG better distributed the stresses and reduced the impact stress in the traumatized tooth. |
| Databáze: | OpenAIRE |
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