The development of decalcification around orthodontic brackets and bands, commonly called white spot lesions (WSLs), is often observed in patients with poor oral hygiene during treatment (Behnan et al., 2010, Rodgers et al., 2010). In many instances, these WSLs continue to be visible after the removal of fixed appliances and after natural remineralization. The purpose of this in vitro study was to compare the effectiveness of two treatment modalities, resin infiltration (RI) and Casein Phosphopeptide Amorphous Calcium Phosphate (CPP-ACP), at improving the light reflectivity and thus the appearance of WSLs using spectrophotometric analysis. Sixty extracted human third molars were partially demineralized to create artificial WSLs and randomly divided into a control (artificial saliva) and two treatment groups. A spectrophotometer (VITA Easyshade® compact) was used before and after treatment to quantify the amount of light (L*) reflected from the surfaces of each tooth specimen. All three groups showed statistically significant improvements in reflectivity, as indicated by the increase in L* after treatment. However, there were no statistically significant differences among the study groups. In conclusion, both treatment modalities and the control were effective at masking WSLs.

LLU Discipline



Orthodontics and Dentofacial Orthopedics


School of Dentistry

First Advisor

Leggitt, V. Leroy

Second Advisor

Lee, Sean S.

Third Advisor

Rynearson, R. David

Degree Name

Master of Science (MS)

Degree Level


Year Degree Awarded

January 2012

Date (Title Page)




Library of Congress/MESH Subject Headings

Decalcification; Pit and Fissure Sealants; Dental fissures; Dental Enamel Permeability

Subject - Local

White Spot lesions; Resin infiltration; Decalcification; Orthodontics; Casein Phosphopeptide Amorphous Calcium Phosphate (CPP-ACP)



Page Count

53 p.

Digital Format


Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.


Loma Linda University Electronic Theses & Dissertations

Collection Website



Loma Linda University. Del E. Webb Memorial Library. University Archives