Comparative evaluation of the marginal fit of inlays fabricated by conventional and digital impression techniques: A stereomicroscopic study

Sharma, Anamika; Abraham, Dax; Gupita, Alpa; Singh, Arundeep; Sharma, Naresh Kumar

doi:10.4103/ccd.ccd_375_19

Cited by 11 publications

(8 citation statements)

References 24 publications

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“…(27) Abduljawad and Rayyan (2) , reported significantly higher marginal gap in endocrowns fabricated by conventional impression which could be also attributed to the discrepancy caused by the impression and die material in addition to the presence of human factor for extra laboratory steps that are expected to produce more errors. Our results were also in agreement with Homsy et al (23) , Sharma et al (33) , and Shamseddin et al (43) However, Falahchai et al (42) , reported similar marginal gap values for endocrowns fabricated with conventional and digital impression. Similar results were also reported by other studies like Abdel-Azim et al (7) , Dauti et al (11) , and Sakornwimon and Leevailoj (44) where no significant difference was found between intraoral digital scanning and conventional impression in the margin adaptation of full coverage ceramic crowns.…”

Section: Discussionsupporting

confidence: 92%

“…Moreover, sometimes the restoration and tooth margins tend to appear rounded upon viewing under magnification which makes the measuring process more challenging. (33) To avoid these viewing limitations, all measurements were performed by the same operator. Also, 3-equidistant reference points were selected on each surface of the tooth and marked with blade so they can be used when measurement is repeated after cementation and thermocycling.…”

Section: Discussionmentioning

confidence: 99%

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Internal fit and marginal adaptation of CAD/CAM lithium disilicate endocrowns fabricated with conventional impression and digital scanning protocols. An in-vitro study

Nassar

2022

Egyptian Dental Journal

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Aim: To evaluate the internal and marginal adaptation of computer aided design/computer aided manufacturer fabricated lithium disilicate endocrowns restoring endodontically treated maxillary molars and produced by conventional impression and digital scanning protocols. Materials and methods:Thirty freshly extracted maxillary molars were prepared to receive endocrowns. Teeth were divided into two groups: conventional impression (n=15) and digital scanning (n=15). After restorations designing on CAD/CAM software, endocrowns were milled from Amber® mill lithium disilicate blocks. The internal gap was assessed by replica technique and stereomicroscope selecting 32 measurements for each restoration while, the mean marginal gap was assessed by stereomicroscope before and after cementation and thermocycling. Internal gap values were analyzed by Independent t-test, One Way ANOVA test for different landmark comparison, Tukey`s Post Hoc test for multiple comparisons, and Repetitive One-Way ANOVA test for marginal gap values before and after cementation.Results: Statistically significant difference in gap values was recorded between different impression protocols and regions (p < 0.05). digital scanning displayed significantly smaller gaps than conventional impression in all regions (p < 0.001). The largest gap was at pulpal floor in both groups. Marginal gap after cementation was larger than before cementation in both groups (p < 0.0001) Conclusions: Digital scanning protocol produced endocrowns with superior internal and marginal adaption than those produced with conventional impression protocol. Pulpal floor showed the highest gap values in all tested regions while, margin showed the lowest gap. Cementation and thermocycling increased the marginal discrepancies but still within the clinically acceptable range.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Internal fit and marginal adaptation of CAD/CAM lithium disilicate endocrowns fabricated with conventional impression and digital scanning protocols. An in-vitro study

Nassar

2022

Egyptian Dental Journal

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“…The current study confirmed that the clinical time for digital impression, adjustment, and cementation is shortened using digital manufacturing methods of onlay (group 2). Furthermore, Sharma et al and Takeuchi et al also proved a significant reduction in impression time by the intraoral scanner and established the high precision of the method [2,5]. Clinical studies depending on the study period, are short-term and long-term.…”

Section: Discussionmentioning

confidence: 99%

“…There are two methods for fabricating Onlaysstandard and digital. The introduction of intraoral scanners for the impression of the prosthetic field, and computer-assisted technologies (CAD / CAM), greatly facilitated the process of making indirect restoration and increased their accuracy [2]. The new composites improved with ceramic for CAD/CAM processing as materials are of improved quality [3].…”

Section: Introductionmentioning

confidence: 99%

Five-year clinical study of indirect aesthetic restorations – Onlays

Kirilova¹,

Kirov²,

Petrova-Pashova³

2023

MedInform

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Background. Restoration of extensive destruction of the clinical crown of vital teeth in treating dental caries is a difficult and responsible task. In the absence of one or more cusps, it is preferred to make Onlays instead of full crowns.Aim. This study compares working time for impressions, adaptation, and cementation of Onlays by different materials and methods and their clinical durability after five years.Material and methods. On 71 vital molars and premolars were made Onlays. Group (1) 36 composite Onlays of Signum ceramics were fabricated by standard methods, and Group (2) 35 Onlays of Cerasmart were manufactured by digital methods. The control visits were after six months, twenty-four months, and sixty months. The criteria for the direct evaluation of the adhesive technique was USPHS.Results. The results show that the time required to produce digital Onlays is significantly shorter than conventional ones. The most significant change is reported in the 5th year of the survey. The conventional Onlays from Signum ceramics show statistically significantly worse scores on parameters: marginal adaptation, anatomical form, proximal contact, surface texture, and loss of restoration parts.Conclusions. This study's results prove that conventional laboratory composites should be limited to restoring significant destruction of vital teeth in treating dental caries with onlay. More suitable are composite blocks of Cerasmart. The current study confirmed that the clinical time for digital impression, adjustment, and cementation is shortened using digital manufacturing methods of onlay.

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“…In a similar research, Sharma et al have compared the conventional impression with different digital ones. Their results gave preference to the digital techniques [9].…”

Section: Introductionmentioning

confidence: 99%

Accuracy comparison of intraoral versus laboratory scanners used in the contemporary dental practice

Galeva

Uzunov

Sofronov

et al. 2022

J. Phys.: Conf. Ser.

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The aim of this in vitro study was to compare the quality of the data obtained by intraoral and by laboratory 3D scanners. An artificial jaw with an acrylic tooth prepared for a full metal ceramic crown was used as a master model of the prosthetic field. A reference model was created by scanning this field by a coordinate measuring machine (CCM). The acrylic master model was scanned by four scanners using three different methods and six digital models were obtained. They were divided in three groups - direct intraoral scanning (DIS), laboratory stone scanning (LSS) and laboratory conventional impression scanning (LCIS). Each scan was saved in the STL file format. Using a computer program, each of the six digital models were compared with the reference model created by the CCM and the results were displayed as color maps. The minimal acceptable deviation was defined as the deviation from the digital standard within the ± 0.02 mm limits. Thus, the LSS group exhibited an average of 13.5% points within these limits, followed by the LCIS group with 17.25%. The result for the DIS group was 44.75%.

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Comparative evaluation of the marginal fit of inlays fabricated by conventional and digital impression techniques: A stereomicroscopic study

Cited by 11 publications

References 24 publications

Internal fit and marginal adaptation of CAD/CAM lithium disilicate endocrowns fabricated with conventional impression and digital scanning protocols. An in-vitro study

Internal fit and marginal adaptation of CAD/CAM lithium disilicate endocrowns fabricated with conventional impression and digital scanning protocols. An in-vitro study

Five-year clinical study of indirect aesthetic restorations – Onlays

Accuracy comparison of intraoral versus laboratory scanners used in the contemporary dental practice

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