ArticleCureus2025
Comparative Analysis of Streptococcus mutans and Lactobacillus spp. Colonization on Stainless Steel versus Zirconia Crowns in Root Canal-Treated Teeth.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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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.
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.
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Who cites it
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Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionRoot canal-treated teeth are often restored using crowns to maintain function and protect against damage. The choice of crown material, such as stainless steel or zirconia, may influence microbial colonization and potentially affect restoration longevity. Bacteria commonly found in the oral environment, such as MATERIALS AND
methodsThis prospective, non-randomized, clinical study enrolled 20 patients requiring crowns on root canal-treated lower first molars using a split-mouth design. The patients received stainless steel (3M ESPE AG, Seefeld, Germany) and zirconia (VITA Zahnfabrik, Bad Säckingen, Germany) crowns based on clinical indications and preferences. Oral prophylaxis was performed using ultrasonic scalers (E.M.S. Electro Medical Systems S.A., Nyon, Switzerland), and crowns were placed within 14 days of RCT by using an endodontic system (Dentsply Sirona Inc., Charlotte, North Carolina, United States). Impressions were made with light body polyvinyl siloxane putty (Elite HD+; Zhermack SpA, Badia Polesine, Italy), and marginal fit was verified clinically. Microbial samples were collected at baseline, one month, and six months using sterile paper points, and the gingival and plaque indices were recorded. Quantitative polymerase chain reaction (qPCR) using a LightCycler 480 System (Roche Diagnostics Corporation, Indianapolis, Indiana, United States) was used to quantify
resultsBoth crown types showed significant increases in plaque index, probing depth,
conclusionZirconia crowns demonstrated lower microbial colonization than stainless steel crowns, suggesting greater biocompatibility for root canal-treated teeth. These findings support zirconia as the preferred material for minimizing microbial-related complications in restorative dentistry.
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