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Clinical Oral Investigations

, Volume 20, Issue 8, pp 2315–2320 | Cite as

Stain removal effect of novel papain- and bromelain-containing gels applied to enamel

  • Eliseu A. Münchow
  • Henry J. Hamann
  • M. Teresa Carvajal
  • Rodolfo PinalEmail author
  • Marco C. BottinoEmail author
Short Communication

Abstract

Objectives

The aims of the study are to prepare novel stain removal gel-based formulations containing papain or bromelain and to investigate their stain removal effect when applied to enamel.

Materials and methods

Experimental bromelain- and papain-based stain removal gels were prepared. Next, enamel/dentin tooth samples (6 × 6 mm2, 4 mm in thickness) were obtained from bovine teeth, stained in coffee solution for 1 week, and measured with a digital spectrophotometer (Easyshade, Vita Zahnfabrik) for color assessment (baseline). The samples were then randomly allocated into four groups (n = 7), according to the stain removal agent applied: ContrastPM+ (Discus Dental, LLC), which is based on 20 wt.% carbamide peroxide (positive control); bromelain-based; papain-based; and no agent (negative control). The materials were applied once a week, three times per day, during 4 weeks, and following the directions of use from positive control. The samples were measured again with the Easyshade and using the CIEL * a * b * color system. The color change (ΔE *) results were obtained by subtracting the baseline values from the final color values obtained at each time point. The data were statistically analyzed using two-way repeated-measures analysis of variance and Student Newman Keuls’s test as a post hoc test (α = 5 %).

Results

All stain removal agents produced greater color change than the negative control (p < .001), with the positive control demonstrating greater ΔE * values when compared to the experimental gels (p ≤ .004). The second application of all gels resulted in greater ΔE * values compared to the first application (p ≤ .025), although no color change was observed after the third application (p ≥ .051), regardless of the material evaluated.

Clinical significance

The proposed gels containing proteolytic enzymes (bromelain or papain) of vegetal origin may hold significant clinical potential as active agents for the preparation of stain removal agents free of hydrogen/carbamide peroxide.

Keywords

Extrinsic stain removal Carbamide peroxide Proteolytic enzymes Digital spectrophotometer 

Notes

Acknowledgments

The authors thank Mr. Cody Spoolstra—Purdue Student Soybean Product Innovation Competition through the fund of Indiana Soybean Alliance.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Funding

This study was funded in part by start-up funds from the IU School of Dentistry (M.C.B.).

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

Not applicable.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of Biomedical and Applied Sciences, Division of Dental BiomaterialsIndiana University School of Dentistry (IUSD)IndianapolisUSA
  2. 2.Graduate Program in Dentistry, School of DentistryFederal University of Pelotas–UFPelPelotasBrazil
  3. 3.Department of Industrial and Physical Pharmacy, College of PharmacyPurdue UniversityWest LafayetteUSA
  4. 4.Department of Agricultural and Biological EngineeringPurdue UniversityWest LafayetteUSA

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