Restorative justice may be moving towards restorative practice. Restorative justice inspired and is part of the wider study of restorative practices. People flocked to resorts built around natural springs thought to have curative and restorative properties. Ceramic materials began being used in restorative dentistry in the 1900s. There are many challenges for the physical properties of the ideal dental restorative material. Neuroplasticity is a central component to restorative therapy to compensate for brain damage. Academic assessment of restorative justice is positive. The different types of restorative items heal varying amounts of health. The term dignity restoration was born from the marriage of reparations and restorative justice. The process of restorative justice thus shifts the responsibility for addressing crime. The prepared tooth, ready for placement of restorative materials, is generally called a "tooth preparation". The IIRP also offers an 18-credit Graduate Certificate in Restorative Practices. Some have suggested shifting from zero tolerance policies to restorative justice approaches. Prior to the introduction of the restorative justice system, Norway had a punitive justice system. They also strongly believe in the concept of victim reconciliation, or restorative justice.