Evidence map›Paper›PMID 38534292›Full record

ArticleDentistry journal2024

Influence of Post-Curing in Nitrogen-Saturated Condition on the Degree of Conversion and Color Stability of 3D-Printed Resin Crowns.

Bohyun Lim, Dohyun Kim, Je Seon Song, Sunil Kim, Hoon Kim, Yooseok Shin

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Dentistry journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07378982 (Three Dimensionally Printed Ceramic-Filled Photopolymer Resin Versus CAD/CAM Resin Composite Overlays for Restoration of Extensively Damaged Endodontically Treated Posterior Teeth. An 18-month Follow-up Randomized Controlled Trial), which is not on this map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.8field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT07378982 nanot yet recruitingnot on this mapstarted 2026, after this paper: background citation

Three Dimensionally Printed Ceramic-Filled Photopolymer Resin Versus CAD/CAM Resin Composite Overlays for Restoration of Extensively Damaged Endodontically Treated Posterior Teeth. An 18-month Follow-up Randomized Controlled Trial

TypeinterventionalSponsorCairo UniversityRan2026 to 2027Enrolled32ConditionsEndodontically Treated Molar, Dental Restoration, PermanentArms3D printed overlay restorations, CAD/CAM restorations
3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 9 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Bohyun LimDepartment of Conservative Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.
Dohyun KimDepartment of Conservative Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.ORCID 0000-0002-0772-6985
Je Seon SongDepartment of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.ORCID 0000-0001-8620-5629
Sunil KimDepartment of Conservative Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.ORCID 0000-0002-8889-9844
Hoon KimResearch Institute of Agriculture and Life Sciences, College of Agriculture & Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.ORCID 0000-0002-4447-4553
Yooseok ShinDepartment of Conservative Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.ORCID 0000-0003-1121-2570
Yonsei University · KRSeoul National University · KR

Funding

Yonsei University, College of Dentistry, faculty research fund 6-2021-0013
6 · The paper itself

Abstract

Post-curing is the process of applying extra light to complete the polymerization process of 3D printing. The mechanical properties of light-cured three-dimensional (3D) printed resin can be improved by decreasing the oxygen concentrations during post-curing, and nitrogen-saturated post-curing has been applied for this purpose. This study aimed to evaluate and compare the color stability of 3D-printed resin crowns that were post-cured in both normal air and nitrogen-saturated conditions. Crowns were fabricated with a 3D printer and post-cured in normal air (control group; air) or nitrogen-saturated conditions (experimental group; nitrogen). The specimens in each group were subdivided into four subgroups, each exposed to different discoloration agents: distilled water, coffee, wine, and curry. Post-immersion color changes were measured using a digital spectrophotometer and analyzed using repeated-measures ANOVA. Fourier transform infrared (FT-IR) spectroscopy evaluated the degree of conversion of resin over immersion times for both post-curing conditions. Upon comparing the effects of post-curing conditions, a significant difference between the control and experimental groups in terms of immersion time in the wine and curry subgroups was found. FT-IR analysis showed a significant difference in the degree of conversion between the air and nitrogen groups from 10 to 300 s. These findings suggest that nitrogen-saturated post-curing can potentially enhance the conversion rate of 3D-printed resin crowns, thereby improving their color stability.

Indexed as

degree of conversionnitrogenpost-curingthree-dimensional printingtooth discoloration

Identifiers

PMID38534292
PMCPMC10969432
OpenAlexW4392513001

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.