ClinicalTrials.gg
Status unknownNCT05509920Updated Aug 22, 2022

Assessment of Arresting Root Surface Caries After the Application of PRG Bioactive Varnish

An interventional study of S-PRG barrier coat in Root Caries, sponsored by Cairo University. Status unknown. Open to participants aged 60 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-08-22.

Sponsored by Cairo University · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Aug 2022), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
58
Allocation
Randomized
Ages
60 Years to 80 Years
Sex
All
01

Study summary

Guidelines proved that arresting and remineralization of the root surface caries is better than weakening the tooth structure and restoring it. Manufacturer claims that PRG Barrier Coat effectively treats dental hypersensitivity by providing immediate and long-lasting relief. Also has the effect of eliminating the activity and sur-vival of pathogenic bacteria and hardening the dentin tissue of the affected areas.

Read the detailed description

A light-cured varnish with extended protection time of up to 6 months, PRG barrier coat incorporates proprietary GIOMER tech-nology, "Surface Pre-Reacted Glass" for high fluoride release and re-charge, continuous release of fluoride, strontium, boron, sodium, aluminum, and zinc, acid neutralization and anti-plaque benefits with excellent self-adhesive abilities. The new material could be an alter-native to SDF varnish in root caries arrest to overcome its unfavor-able color and taste.

Products containing S-PRG fillers have been developed in a wide variety of areas such as tooth surface coating materials, seal-ants, restoration resins and dentifrices. The use of these materials is also expected to have the effect of improving the properties of enamel. In this seminar, we will introduce a new caries prevention using S-PRG filler The eluted ions from the S-PRG filler containing materials exhibit various functions, such as prohibition of biofilm attachment, anti-demineralization, remineralization, modification of apatite crystal, and acid-buffering effect. Each ion was confirmed its function. Par-ticularly, Strontium, Borate and Fluoride ions were involved during calcium phosphate nucleation to form modified nano-hydroxyapatite. The acid buffering effect was shown with the borate ion. As the results of those effects of ions, the various materials with S-PRG technology were proven to con-tribute to increase the acid resistance and the caries prevention.

02

Conditions studied

  • Root Caries

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03

In context

Root Caries

39 studies on the registry are indexed under Root Caries; 14 are open to participants now.

This study's planned enrollment of 58 is close to the median of 62 across 35 interventional studies indexed under Root Caries.

Browse Root Caries studies →

Lead sponsor

Cairo University is the lead sponsor of 4,941 studies on the registry; 1,458 are open to participants now.

Of its 37 completed or terminated interventional studies of FDA-regulated products, 5 (14%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
60 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Teeth with primary root surface caries (active dentin carious le-sions)
  • Teeth with gum recession.
  • Teeth are vital according to pulp-sensitivity tests.
  • Controlled gingival or periodontal conditions.

Exclusion criteria

Exclusion Criteria:

  • Retained deciduous teeth; as the research is targeting only per-manent teeth.
  • Teeth with previous restorations which may add another varia-ble to the study (type of old restorative material, extent of re-current caries).
  • Spontaneous pain or prolonged pain after sensitivity tests (cold and electrical tests) indicating irreversible pulpitis.
  • Negative sensitivity tests, periapical radiolucencies, and sensi-tivity to axial or lateral percussion indicating pulp necrosis.
  • Teeth presenting external or internal resorption, with adverse pulpal reactions which may affect the outcome of the study.
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
58 participants (estimated)

Study arms

  • Active comparator
    patients with root carious lesions will be treated by SDF varnish

    Silver diamine fluoride (SDF) contains high concentrations of silver and fluoride ions, which prevents and arrests root caries, as well as dentin caries in the primary teeth of young children. Unlike other fluoride products that mainly reduce the formation of new carious lesions, 38% SDF is an effective agent that can efficiently arrest the carious process, remineralize the decayed dental tissues, and protect the tooth structure against the for-mation of new caries lesions. The use of SDF can result in more caries-resistant tooth structures.

    Other: S-PRG barrier coat

  • Experimental
    patients with root carious lesions will be treated by PRG barrier coat.

    PRG barrier coat is a Giomer varnish from Shofu. It is a light cured Surface-partially reacted glass (S-PRG) filler particles with a multifunctional glass core embedded in a resin matrix. It has an immediate and long lasting effect. The (S-PRG) favors the re-lease of fluoride ions and its recharging that aid in remineraliza-tion and protection of the tooth structure in a way similar to the glass ionomer. The fluoride ions aid in the neutralization of the acidity of the oral cavity and decrease the plaque accumulation

    Other: S-PRG barrier coat

Interventions

  • OtherS-PRG barrier coat

    S-PRG filler was the best composition of compressive strength and F- and B release acid buffering capacity. It was found to be the most promising for use as a novel cement.

06

What researchers measure

Primary outcomes

  1. Evaluation of caries arrest

    Evaluation of caries arrest by visual tactile evaluation. (mean number of arrested carious lesions that become hard, smooth and free from plaque post application of both SDF and S-PRG varnishes).

    Time frame: one year

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Oct 2022; primary completion for Nov 2023, 13 months later.

Of 21 interventional studies with no phase under Root Caries, half reached primary completion within 30 months of starting (the median), counting those still running; a quarter within 23 and three quarters within 55. This study's planned 13 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 19, 2022
First posted
Aug 22, 2022
StartEst.
Oct 2022
Primary completionEst.
Nov 2023
CompletionEst.
Dec 2023
Last update
Aug 22, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 22, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05509920
Lead sponsor
Cairo University
Responsible party
Salma Sayed (principal investigator, Cairo University) — Principal investigator
First posted
Aug 22, 2022
Start date
Oct 2022 (estimated)
Primary completion
Nov 2023 (estimated)
Completion
Dec 2023 (estimated)
Last update
Aug 22, 2022

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is status unknown, as verified in Aug 2022. You cannot join it, but the record below documents what was studied.

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