Comparative evaluation of microleakage of conventional crowns and endocrowns using confocal laser scanning electron microscope – An in vitro study

Sudha, Kakollu; Mohan, T Murali; Aparna, Kalagotla; Yadav, Bhupathi Sravanthi; Rani, E. Sandhya; Sowjanya, Dunnala Lakshmi

doi:10.4103/jdrntruhs.jdrntruhs_1_20

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…The canal orifice was then filled using a flowable composite resin (CLEARFIL MAJESTY ES Flow, Kuraray Medical, Okayama, Japan) [ 33 ]. According to Fig 1A , a diamond disk (918 BF, DZ, Lemgo, Germany) at a low speed was employed to section the tooth 2 mm above the CEJ and parallel to the occlusal surface to prepare a butt-joint design [ 34 , 35 ]. Using a periodontal probe suggested the preparation was performed at a 4–5 mm depth of the reduced walls, measured through the access cavity.…”

Section: Methodsmentioning

confidence: 99%

The internal and marginal adaptation of lithium disilicate endocrowns fabricated using intra and extraoral scanners: An in-vitro study

Akhlaghian,

Khaledi,

Mosaddad

et al. 2024

PLoS ONE

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Objectives The impression technique highly influences the adaptation of ceramic restorations. Not enough information is available to compare the marginal (MF) and internal fit (IF) of endocrowns fabricated with various digitization techniques. Therefore, this in-vitro study aimed to compare the MF and IF of lithium disilicate (LDS) endocrowns fabricated through direct and indirect digital scanning methods. Materials and methods One extracted maxillary molar was used to fabricate endocrowns. The digitization of the model was performed with (G1) direct scanning (n = 10) utilizing an intraoral scanner (IOS), (G2) indirectly scanning the conventional impression taken from the model using the same IOS (n = 10), (G3) indirectly digitalizing the obtained impression using an extraoral scanner (EOS) (n = 10), and (G4) scanning the poured cast using the same EOS (n = 10). The MF and IF of the endocrowns were measured using the replica method and a digital stereomicroscope. The Kruskal-Wallis test was used to analyze data. Results The studied groups differed significantly (p<0.001). G2 (130.31±7.87 μm) and G3 (48.43±19.14 μm) showed the largest and smallest mean vertical marginal gap, respectively. G2 and G3 led to the highest and lowest internal gaps in all regions, respectively. With significant differences among the internal regions (p<0.001), the pulpal area demonstrated the most considerable misfit in all groups. Conclusions Scanning the impression using an extraoral scanner showed smaller marginal and internal gaps.

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Section: Methodsmentioning

confidence: 99%