Systems and Techniques for Removal of Failed Fixed Partial Dentures: A Review

Abstract

Abstract:FPDs have a long life span but sometimes they should be removed for several reasons at which they are; secondary caries, the need for root canal treatment, severe gingival recession or periodontal disease, loosened retainer of a bridge, post loosening, root fracture, over contoured and unaesthetic restorations. The removal of temporary crowns and bridges are usually straightforward, while the removing of permanent cemented restorations are always an unpleasant, anxietyridden, risky subject for both dentist and patient. So the objective of the bridge removal is the ability to reuse them and to avoid damaging of the underlying tooth and supporting structures. The FPDs removal instruments are: large spoon excavator, scalar tip, brass ligature wires, matrix band, chisel and hammer. In addition to that, there are also coronal disassembly crown remover forceps, precision-made air-activated units; modified techniques have also been highlighted in this article for ease of use for the clinician. The aim of this review is to give an overview and describe the various available systems and techniques to remove the FPDs and to provide different options for each clinical condition. A PubMed literature was conducted up to June 2015 using the keywords: Crown and bridge (removal, disassembly, failure). Additionally, the bibliographies of 5 previous reviews, their cross references were manually searched.

Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An In Vitro Study

“…These physical strengths and bonding capabilities allow for long lasting restorations in the oral cavity. These clinically desirable properties however become a major obstacle when the crown needs to be removed [13,14]. When the crown retrieval is indicated due to recurrent dental caries, misfits, esthetic reasons, material damage or a need for endodontic therapy, a rotary handpiece with a cutting bur is a common conventional method to remove the crown.…”

Evaluation of the effectiveness and practicality of erbium lasers for ceramic restoration removal: A retrospective clinical analysis

“…The conventional technique for removing bonded or cemented all-ceramic restorations can vary in cutting efficiency depending on the handpiece and bur used [ 5 ]. One of the challenges is that it can be difficult to visually distinguish between the tooth-colored cement and the natural tooth structure, leading to the common occurrence of abutment tooth damage or unnecessary removal of tooth structure during conventional restorative removal [ 6 , 7 ]. Furthermore, even after the crown is removed, clinicians often make efforts to remove most of the remaining composite resin luting material, as any residual composite material can potentially interfere with future dentin preparation for new bonded restorative material [ 8 ].…”