Tooth preparation Dental restoration

tooth #3, upper right first molar, beginning of mo preparation. looking preparation, white, outer enamel appears intact, while yellow, underlying dentin appears recessed. because dentin decayed , removed. portion of enamel unsupported, , should removed prevent future fracture.

restoring tooth form , function requires 2 steps: (1) preparing tooth placement of restorative material or materials, , (2) placement of these materials. process of preparation involves cutting tooth rotary dental handpiece , dental burrs make space planned restorative materials , remove dental decay or portions of tooth structurally unsound. if permanent restoration cannot carried out after tooth preparation, temporary restoration may performed.

the prepared tooth, ready placement of restorative materials, called tooth preparation. materials used may gold, amalgam, dental composites, glass ionomer cement, or porcelain, among others. preparations may intracoronal or extracoronal. intracoronal preparations serve hold restorative material within confines of structure of crown of tooth. examples include classes of cavity preparations composite or amalgam gold , porcelain inlays. intracoronal preparations made female recipients receive male components of removable partial dentures. extracoronal preparations provide core or base upon restorative material placed bring tooth functional , aesthetic structure. examples include crowns , onlays, veneers.

in preparing tooth restoration, number of considerations determine type , extent of preparation. important factor consider decay. part, extent of decay define extent of preparation, , in turn, subsequent method , appropriate materials restoration.

another consideration unsupported tooth structure. when preparing tooth receive restoration, unsupported enamel removed allow more predictable restoration. while enamel hardest substance in human body, particularly brittle, , unsupported enamel fractures easily.