Mouthguards Based on the Shear-Stiffening Effect: Excellent Shock Absorption Ability with Softness Perception

The production and materials of mouthguards: Conventional vs additive manufacturing - A systematic review

“…However, the authors retracted that the benefits are due to significantly simplifying the production process and also reducing errors in the printing and plaster transfer process. Huang et al [ 93 ] and Zhou [ 94 ] highlight the need for a thin and soft material that maintains the mechanical properties and work by Li et al [ 85 ] follows this principle through manufacturing via FDM.…”

A Shear-Stiffening Mouthguard with Excellent Shock Absorption Capability and Remoldability via a Dynamic Dual Network

“…Shear-stiffening materials (SSMs) have emerged recently, which show a transformation from a liquid state to a solid state with increasing external strain rates. − Polydiborosiloxane (PDBS), a new shear-stiffening material reported by our group recently, is a kind of polysiloxane in whose chains diboron structures are introduced. Compared with polyborosiloxane (PBS, the traditional shear-stiffening material), PDBS exhibits better anti-impact ability through diboron/oxygen dative bonds. , Such impact resistance of shear-stiffening materials has increasingly attracted attention from the academic perspective. − For example, Gong et al prepared a host–guest structural composite consisting of SSMs dispersively distributed in a porous polyimide matrix, which effectively attenuates the impact force of 85.8–92.3% and provides a reliable guarantee for conductive elements against impact; Huang et al constructed cellulose supported SSMs, resulting in stable shapes with significantly impact-resistant performance; Zhang et al developed an impact-hardening gel composed of SSMs and polyethylene glycol, which exhibits an outstanding protective ability by reducing the impact force by 80.2% of that of the control. Therefore, SSMs provide a new strategy to design the molecular structure of mouthguard materials to improve the shock absorption of a mouthguard, thereby relieving the discomfort of the mouthguard.…”

Silicone Bioadhesive with Shear-Stiffening Effect: Rate-Responsive Adhesion Behavior and Wound Dressing Application

“…Noncovalent interactions are beneficial to develop stimuli-responsive adhesives . Poly­(borosiloxane) (PBS), a supramolecular material containing massive monoboron/oxygen dative bonds, exhibits a fantastic shear-stiffening effect and thus can be employed as an intelligent material with a simple force rate response. − For instance, our group constructed a smart sensor by combining PBS, poly­(dimethylsiloxane) (PDMS), and carbon nanotubes (CNTs), where the electric conductivity of the sensor exhibits response to the force rate. Therefore, the sensor can be applied to artificial skin for touching-rate sensing and strain-rate monitoring .…”