Twelve-month Bracket Failure Rate with Amorphous Calcium Phosphate Bonding System

Background: The aim of the study was to compare the survival rate of brackets bonded with amorphous calcium phosphate containing adhesive and fluoride releasing orthodontic adhesive over 6 months period. White spot lesions were also evaluated prior to bonding, 3 months and 6 months from the date of bonding. Methods: Thirty six orthodontic patients were randomly divided into two equal groups using split mouth design. 592 brackets were bonded up to the premolars with either Aegis Ortho or Transbond Colour Change(TPCCA). Bracket failure rate and survival distribution were evaluated and compared using Kaplan- meier analysis and Log rank test with respect to adhesives, dental arches, segments , tooth types, gender and age groups. White spot lesion was assessed using WSL index. Results: There was no significant difference between the failure rate of Aegis Ortho(3.0%) and TPCCA(1.4%). Kaplan Meier analysis, Log rank test showed that the difference in the overall failure rate and survival time between the arches, gender, and different age groups were not statistically significant. Both adhesives had a high bond failure rate in the posterior segment especially in the premolar region. Three patients had white spot lesions in the upper premolar region bonded with Aegis ortho. Conclusion: Both Aegis ortho and Transbond plus colour change adhesive with a low bond failure rate can be used as an alternative orthodontic adhesive. Key words : bond failure, amorphous calcium phosphate, transbond colour change adhesive, white spot lesions.

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Shear Bond Strength of Molar Tubes to Enamel Using an Orthodontic Resin-Modified Glass Ionomer Cement Modified with Amorphous Calcium Phosphate

Frontiers in Dentistry ◽

10.18502/fid.v16i5.2286 ◽

2020 ◽

Author(s):

Behrad Tanbakuchi ◽

Tabassom Hooshmand ◽

Mohammad Javad Kharazifard ◽

Kiana Shekofteh ◽

Arian Hesam Arefi

Keyword(s):

Calcium Phosphate ◽

Bond Strength ◽

Amorphous Calcium Phosphate ◽

Shear Bond Strength ◽

Testing Machine ◽

Enamel Surface ◽

Glass Ionomer ◽

Posterior Teeth ◽

Bonding System ◽

Resin Modified Glass Ionomer

Objectives: This study aimed to assess the shear bond strength (SBS) of molar tubes to the enamel surface of molar teeth using a resin-modified glass ionomer (RMGI) cement modified with amorphous calcium phosphate (ACP). Materials and Methods: In this in-vitro study, 60 extracted human third molars were randomly divided into four groups for bonding of molar tubes to the enamel surface. Fuji Ortho LC and Fuji Ortho LC modified with ACP (1.55 wt%) were used in groups 1 and 2, respectively. In group 3, the enamel surface was sandblasted, and bonding was then performed using Fuji Ortho LC glass ionomer modified with ACP. In group 4, molar tubes were conventionally bonded using Transbond XT composite. The SBS was measured using a universal testing machine. Results: The mean SBS of groups 1 to 4 was 10.22, 6.88, 9.4, and 13.68 MPa, respectively. Only the SBS of group 1 was not significantly different from that of groups 3 and 4 (P>0.05). Comparison of adhesive remnant index (ARI) scores of the groups revealed significant differences only between groups 1 and 4 (P<0.001) and between groups 1 and 2 (P=0.002). Conclusion: The results revealed that the addition of ACP to Fuji Ortho LC significantly decreased the SBS of molar tubes bonded to enamel compared to the conventional resin bonding system. Sandblasting of the enamel surface significantly increased the bond strength. Fuji Ortho LC modified with ACP is recommended for bonding of molar tubes to posterior teeth considering its cariostatic property.

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Reversal of Root Caries with Casein Phosphopeptide-Amorphous Calcium Phosphate and Fluoride Varnish in Xerostomia

Caries Research ◽

10.1159/000516176 ◽

2021 ◽

pp. 1-10

Author(s):

Ahmed Sleibi ◽

Anwar R. Tappuni ◽

Aylin Baysan

Keyword(s):

Calcium Phosphate ◽

Amorphous Calcium Phosphate ◽

Primary Root ◽

Severity Index ◽

Salivary Flow ◽

Root Caries ◽

Carious Lesions ◽

Group 2 ◽

Casein Phosphopeptide ◽

Group 1

Different formulas of topical fluoride have been used to manage root carious lesions. This clinical trial aimed to investigate the efficacy of a dental varnish containing casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride compared with fluoride alone in reversing/arresting root caries in xerostomic patients over 1 year. A total of 80 patients (age range 45–92 years) with primary root caries (n = 184 root carious lesions) and unstimulated salivary flow rate of <0.2 mL/min were randomly allocated to receive either dental varnish containing CPP-ACP and 5% fluoride (group 1: MI varnish; GC, Japan) (n = 41, 83 lesions), or dental varnish with 5% fluoride alone (group 2: NUPRO White; Dentsply, USA) (n = 39, 101 lesions). Clinical assessments with Severity Index (SI) for root caries, DIAGNOdent measurements, and varnish application were carried out at baseline, 3, 6, and 12 months. Standard oral hygiene instructions with 1,450 ppm fluoride toothpastes were provided for both groups. After 3 months, 63.9% (n = 46) of root caries in group 1 became hard (SI: 0) compared with 39.3% (n = 35) in group 2 (p < 0.01). After 6 and 12 months, the differences in SI were insignificant (group 1, n = 60, 83.3%) (group 2, n = 66, 74.2%) (p = 0.36), and (group 1, n = 60, 89.6%) (group 2, n = 67, 81.7%, n = 1 soft, 1.2%) (p = 0.29), respectively. In both groups, noncavitated leathery lesions were more likely to become hard when compared to the cavitated root caries. A significant decrease in plaque index, surface roughness, lesion dimension, and DIAGNOdent readings with a significant increase in lesion distance from the gingival margin was reported in both groups (p < 0.05). This study has provided evidence that fluoride dental varnish either with or without calcium and phosphate has the potential to arrest/reverse root caries, especially noncavitated lesions for patients with xerostomia.

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