Effect of a fiber‐reinforcing technique for direct composite restorations of structurally compromised teeth on marginal microleakage

Abstract

Objectives To evaluate if the marginal microleakage of extensive Class I composite resin restorations can be affected by applying ultra‐high‐molecular‐weight polyethylene (UHMWPE) fibers with the wallpapering technique combined with different restorative materials and methods. Materials and methods A 120 human molars were selected and one extensive Class I cavity was prepared on the occlusal surface of each tooth. The specimens were divided into 12 groups (n = 10) according to the type of restorative material (Filtek Z550, Beautifil II LS or Beautifil Bulk Restorative), the use or not of reinforcing fibers (ribbond) and the applied restorative technique (incremental or bulk). The specimens were subjected to thermocycling and then immersed into a 50 wt% silver nitrate solution following a dying protocol. Subsequently, the teeth were prepared for SEM observations to evaluate the extent of marginal microleakage. Results Three‐way ANOVA revealed that the type of material, the use of ribbond fibers and the type of restorative technique significantly affected marginal microleakage (p < 0.001). Application of ribbond fibers decreased marginal microleakage to all tested restorative materials, regardless of the restorative technique, in a range of 31.2–81.4%. In the groups with no‐use of ribbond fibers, among the materials there were no significant differences in microleakage when the teeth were restored with the incremental technique (p > 0.05). Conclusions The use of UHMWPE fibers with wallpapering technique in Class I composite restorations may be an effective method to reduce marginal microleakage, regardless of the selected restorative technique or the material. Clinical relevance Clinicians may be encouraged to utilize reinforcing fiber restorative techniques for direct restorations of structurally compromised teeth as a valid alternative to indirect restorations.

Effect of Using Fiber Reinforcement Ribbond® System on Marginal Adaptation of Fluoride Releasing Restorations: An In Vitro Study

“…These findings agreed with the previous studies 33,43 . These studies affirmed that the use of Ribbond ® fibers improved the marginal adaptation of the restoration.…”

“…Usually, polyethylene fiber ribbons are inserted using the "wallpapering" technique. The term "wallpapering" describes the clinical technique of applying the fibers to cover the lateral walls of the prepared cavity, especially in class I because the risk of debonding is higher at the cavity walls due to a high C factor ratio 33 . However, this study was carried out to assess the marginal adaptation at the gingival floor in class II cavities, therefore, the Ribbond ® system was only applied to the gingival floor.…”

“…However, this study was carried out to assess the marginal adaptation at the gingival floor in class II cavities, therefore, the Ribbond ® system was only applied to the gingival floor. Improper adaptation at the tooth/restoration interface is due to the formation of multiple stresses induced by polymerization shrinkage, thermal fluctuation, and occlusal load 33 .…”

“…The concept of biomimetic dentistry has emerged, aiming to introduce restorative materials that can mimic the structure and integrity of natural teeth 32 . Biomimetic dentistry strategies mainly target two goals: maximizing bond durability and reducing stresses 33 . Among the stress-reduction methods are the insertion of reinforcing fibers in resin composite restorations 34,35 .…”

Eficácia dos materiais restauradores temporários utilizados no tratamento endodôntico: revisão de literatura

“…A microinfiltração pode acontecer por erro no preenchimento do material obturador no canal radicular, recontaminação dos condutos, traumas locais ou até mesmo à propriedade de contração do material restaurador temporário durante o período intercalado das sessões durante o tratamento endodôntico, e tempo de presa dos seladores temporários (BRAGA, FERRACANE, et al, 2004;JUNG et al, 2006;MESHRAM et al, 2019;PEREIRA et al, 2021;SFEIKOS et al, 2022).…”