Effect of a hyperbaric environment (diving conditions) on adhesive restorations: an in vitro study

Abstract

Objectives No recent study has addressed the effect of diving conditions (pressure increase) on adhesive restorations. We evaluated the impact of a simulated hyperbaric environment on microleakage of the dentine-composite resin interface. The ultimate aim was to propose recommendations for restorative dentistry for patients who are divers to limit barodontalgia (dental pain caused by pressure variations of the environment) and may lead to dangerous sequelae.Methods We bonded 20 dentine disks by using an adhesive system (Scothbond Universal) to ten intact composite cylinders and ten composite cylinders with porosity (Ceram X mono). For each group, the samples were divided into two subgroups, one submitted to a simulated hyperbaric environment and the other to an ambient environment. All samples were immersed in a silver nitrate solution to evaluate microleakage at the interface after analysis with a camera.Results Dye percolation for groups in the hyperbaric environment was greater than groups in ambient environment. For each subgroup, dye percolation was greater for samples with than without porosity.Conclusions High percolation percentages demonstrate that our simulated hyperbaric condition led to loss of sealing at the dentine-composite resin interface, especially with porous composites.Clinical significance Respect of the protocol and the quality of condensation for adhesive restorations are important in all clinical situations, especially for patients who are divers. A more interventionist approach must be adopted with these patients.

Adhesion of auto-mixed and manual-mixed self-adhesive resin cements to dentin on exposure to long-term high-altitude pressure

“…They concluded that Panavia SA exhibited excellent viscous behavior in terms of working time and curing reaction. Mocquot et al reported that the use of flowable composites, vibration and preheating methods could help limit the presence of air bubbles (Mocquot et al , 2017). This may be the limitation of our study, as more studies are needed to select the appropriate resin, the application methods and the chemical composition of resins that may cause different results after pressure changes.…”

The effect of environmental pressure changes on the bond strength between zirconia ceramic and adhesive resin cement

“…On the other hand, the possible air voids may occur inside the pits and pores after surface roughening on zirconia surface, this may affect the bonding values after pressure changes. Although, micromechanical locking from penetration of resins along pits and pores seemed to be an important factor in promoting Figure 5 Representative light microscopy (30x) and SEM images (1000x) of the debonded surfaces adhesion between zirconia and resin, the effect of the environmental pressure changes on dental materials are not known (Mocquot et al, 2017). Different surface treatments and mechanical tests are needed to fully understand the effect of ambient pressure changes.…”

Barotrauma y barodontalgia en la aviación

“…En el caso de realizar exámenes radiográficos, se recomiendarealizarlos cada 3 a 5 años. También se recomien-da la realización de test de vitalidad en piezas donde se sospecha de una necrosis pulpar asintomática (6,13,18). Siempre se preferirán las prótesis implanto soportadas por su gran capacidad de retención (16).…”

“…Siempre se preferirán las prótesis implanto soportadas por su gran capacidad de retención (16). ionómero como cemento de base cavitaria, ya que será un aislante térmico y eléctrico, se adhiere químicamente a la estructura dentaria y así compensa la contracción de la polimerización de la resina, si ella fuera usada como restauración definitiva (18).…”