Provisionalisation in Fixed Prosthodontics

Guazzato, Massimiliano; Santosa, Robert; Chou, J.

doi:10.1002/9781118702888.ch7

Cited by 1 publication

(1 citation statement)

References 20 publications

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“…Achieving precise marginal and internal fit in these interim 3D-printed restorations is of utmost importance, especially in cases of prolonged esthetic and occlusal rehabilitation, as it significantly influences the overall outcome. The marginal gap refers to the space between the restoration margin and the finish line of the prepared tooth while the internal gap refers to the spacing between the internal surface of the restoration and the prepared tooth structure ( 2 , 3 ). A proper marginal and internal fit ensure the structural durability of interim FPDs and promotes the health of adjacent soft tissues, ultimately contributing to the long-term success of the restorations ( 4 - 6 )…”

Section: Introductionmentioning

confidence: 99%

Trueness of vat-photopolymerization printing technology of interim fixed partial denture with different building orientation: A Microcomputed tomography study

Radwan,

Abdou,

Tawfik

et al. 2024

J Clin Exp Dent

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Background The aim was to assess the consequence of different printing orientation on the marginal misfit and internal gap of 3-unit interim fixed partial denture manufactured by two different additive manufacturing technologies compared to milling technique. Material and Methods Three-unit interim fixed partial denture (FPD) was designed by using exocad software (Dental CAD 3.0 Galway) in the format of standard tessellation language (STL) , which was transferred to a nesting software (PreForm) and printed by A Next Dent C&B resin liquid (NextDent; Soesterberg, Neitherland) by using two printing technologies; stereolithography (SLA, n=30) and digital light processing (DLP, n=30) with 3 different orientations (occlusal direction [0°] ,buccal direction [90°] & lingual direction [270°]) for each technology (n=10). Additionally, a control group was milled (CAD/Milling, n=10) from DC PMMA A1 Disc (White peaks dental solutions; Gmbh& co., Germany). A Microcomputed tomography was used to measure the marginal misfit and internal gap for each specimen in 12 different points. The average value of the marginal and internal gaps measurements was calculated, and one-way ANOVA was used for the comparison between groups. Results SLA printing technology showed a similar result to CAD/Milling with all different printing orientations tested. DLP printing technology showed the highest gap values within all the printing orientations with significant difference ( p < 0.001) with the CAD/Milling and SLA. Conclusions Regarding the trueness of the interim FPDs, SLA was a promising technology for its superior adaptation. Marginal misfit and Internal gap for DLP printing technology limiting the use of that technology as it exceeded the acceptable clinical range. Key words: 3D Printing, Microcomputed topography, Marginal Gap, Internal Misfit.

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