Trends in Indirect Dentistry: 6. Provisional Restorations, More than Just a Temporary

Abstract

The provision of well-fitting, functional provisional restorations is important for a wide variety of reasons, including maintenance of the stability of inter- and intra-arch relationships and positional stability of prepared teeth, and the preservation of occlusal function of anterior provisional restorations by providing appropriate protrusive and lateral guidance. Provisional restorations should be of sufficient strength to resist the forces of occlusion and should be luted with a cement that will resist the forces of removal, yet allow easy removal at the fit appointment without leaving a residue on the prepared tooth. This paper describes the use of provisional restorations in indirect restorative dentistry and suggests some specific techniques for clinical use.

Temperature rise on dentin caused by temporary crown and fixed partial denture materials: Influencing factors

“…1,2 The main purpose of an interim restoration is to protect the prepared tooth and the pulp from thermal, mechanical and microbial noxious effects for the required period of time as well as to maintain adequate masticatory function, phonetics and esthetics. [3][4][5][6][7] The most common way of fabricating temporaries is direct chair-side application in the patients' mouth using impressions or transparent matrices to obtain the optimal shape. Currently, a large number of resin-based materials are commercially available (temporary crown and j o u r n a l o f d e n t i s t r y 3 8 ( 2 0 1 0 ) 9 6 4 -9 7 3 fixed partial denture material = t-c&b) to fabricate direct temporary restorations.…”

Effect of surface condition and storage time on the repairability of temporary crown and fixed partial denture materials

“…Interim restorations are also required for a number of other important purposes: to stabilize the tooth position, to ensure masticatory function and phonetics as well as to restore or preserve esthetic quality. [4][5][6][7][8][9] Often temporary restorations have to last for more than 2-3 months, e.g. to assess the periodontal condition of the teeth involved.…”

“…To fulfill all these requirements over a prolonged period of time, the materials used to fabricate temporary crowns and fixed partial dentures must possess certain material-specific properties. 8,[10][11][12] Besides mechanical strength, the repairability of temporary c&b materials (t-c&b) is of major clinical relevance. 13 Repair or optimization of temporary restorations may become necessary for one or more of the following reasons 14 :…”

“…[18][19][20][21] Material needs to be added to improve the mechanical strength of the temporary. 8,22,23 Damage during fabrication may occur if the temporary restoration is removed too early during polymerization from the prepared tooth, 24 thin walls 8,16 caused by too slight tooth preparation 14 or technical errors during fabrication (e.g. forgetting to block out undercuts).…”

“…Material defects will occur if too little material is dispensed into the over-impression, if bubbles are dispersed in the material or if marginal areas are trimmed too aggressively. 25 Potential reasons for any fractures of restorations during use would include an incorrect occlusion, 8,14 undercontoured pontics or trauma. Fractures can occur even during normal masticatory function, notably with long-span bridges.…”