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Temperature rise on dentin caused by temporary crown and fixed partial denture materials: Influencing factors

Seelbach, Paul ; Finger, Werner J ; Ferger, Paul ; Balkenhol, Markus

Journal of dentistry, 2010-12, Vol.38 (12), p.964-973 [Periódico revisado por pares]

Kidlington: Elsevier Ltd

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Título:
Temperature rise on dentin caused by temporary crown and fixed partial denture materials: Influencing factors
Autor: Seelbach, Paul ; Finger, Werner J ; Ferger, Paul ; Balkenhol, Markus
Assuntos: Analysis of Variance ; Biological and medical sciences ; Body Temperature ; Clinical medicine ; Composite ; Cooling ; Crowns ; Curing ; Dental materials ; Dental Restoration, Temporary ; Dentin ; Dentin - anatomy & histology ; Dentistry ; Denture, Partial, Fixed ; Dentures ; Discs ; Disks ; Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics ; Hot Temperature ; Humans ; Hypotheses ; Interim restoration ; Materials Testing ; Maxillofacial surgery. Dental surgery. Orthodontics ; Medical sciences ; Methacrylates ; Molar ; Polymerization ; Prosthetics ; Provisional restoration ; Resin ; Standard deviation ; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases ; Technology. Biomaterials. Equipments ; Temperature ; Temporary crown ; Temporary fixed partial denture
É parte de: Journal of dentistry, 2010-12, Vol.38 (12), p.964-973
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Descrição: Abstract Objectives Temporary crowns and fixed partial denture materials (t-c&b) generate exothermic heat during polymerization. The amount of temperature, reaching the pulp chamber, is dependant on the residual thickness of the prepared dentin as well as the volume of the t-c&b used. Hence, the aim of this study was to investigate the influence of both factors on the temperature rise at the pulpal dentin surface as well as in the bulk of the t-c&b during polymerization. Methods Four t-c&bs (Luxatemp AM Plus, Protemp 3 Garant, Structur Premium, Trim) were used to fabricate flat cylindrical specimens ( 15.5 mm) of different thicknesses (1, 2 and 4 mm) using an over-impression placed on top of dentin discs (thickness 0.5, 1 and 2 mm). Temperature was recorded at the pulpal dentin surface as well as inside the t-c&b ( n = 6). Data was subjected to parametric statistics ( α = 0.05). Results Peak temperatures inside the t-c&b varied between 37.0 °C and 51.9 °C and at the pulpal dentin side between 37.0 °C and 50.6 °C. The maximum temperatures registered depended significantly on the thickness of the dentin disc and t-c&b, respectively (ANOVA p < 0.05). Peak temperatures were reached 2–3 min after start of mixing (dimethacrylates) and 6 min (mono-methacrylate), respectively, whereas Trim exhibited significantly higher peak temperatures ( p < 0.05). Conclusions At 4 mm layer thickness of the t-c&b, temperature rise may become critical if the material is not cooled properly. Composite-based t-c&bs showed significant lower curing temperatures than Trim and should therefore be preferred in daily practice.
Editor: Kidlington: Elsevier Ltd
Idioma: Inglês;Persa

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Temperature rise on dentin caused by temporary crown and fixed partial denture materials: Influencing factors

Seelbach, Paul ; Finger, Werner J ; Ferger, Paul ; Balkenhol, Markus

Kidlington: Elsevier Ltd

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