Evaluation of Antimicrobial Photodynamic Therapy and Minimal Intervention Associated With Deproteinization in Permanent Teeth With Molar Incisor Hypomineralization

Evaluation of Antimicrobial Photodynamic Therapy and Minimal Intervention Associated With Deproteinization in Permanent Teeth With Molar Incisor Hypomineralization: Study Protocol for a Clinical, Controlled, Blinded Trial.

Introduction: Molar Incisor Hypomineralization (MIH) is a qualitative defect of enamel development that occurs in the mineralization phase. MIH affects one or more permanent molars and, occasionally, permanent incisors. The aim of the proposed study is to evaluate the clinical effect of antimicrobial photodynamic therapy (aPDT) on permanent teeth with MIH through decontamination and sensitivity control. The longevity of the restorations will also be evaluated after the deproteinization procedure. Methods and analysis: Patients 8 to 12 years of age with permanent molars will be randomly allocated to three groups. Group 1: selective chemical-mechanical removal of carious dentinal tissue around the walls of the cavity with Papacárie Duo and a curette followed by the application of aPDT and deproteinization with Papacárie Duo; Group 2: selective removal of carious dentinal tissue around the walls of the cavity with a curette, followed by the application of aPDT and deproteinization with a 5% sodium hypochlorite solution; Group 3: selective removal of carious dentinal tissue using a curette. The selected teeth must have a carious lesion in the dentin and post-eruptive enamel breakdown on one or more surfaces with an indication for clinical restorative treatment. The teeth will subsequently be restored using a mixed technique with resin-modified glass ionomer cement and bulk-fill composite resin. The data will be submitted to descriptive statistical analysis. Associations with age and sex will be tested using either the chi-squared test or Fisher's exact test. Pearson's correlation coefficients will be calculated to determine the strength of correlations between variables. Comparisons of the microbiological results (colony-forming units) will be performed using ANOVA and the Kruskal-Wallis test. Kaplan-Meier survival analysis will be performed to assess the performance of the restorations.

Study Overview

• Status: Recruiting
• Conditions: Hypomineralization Molar Incisor
• Intervention / Treatment: Procedure: Conventional caries treatment; Procedure: Antimicrobial PDT and Papacarie Deproteinization; Procedure: Antimicrobial PDT and 5% NaOCl Deproteinization

• Study Type: Interventional
• Enrollment (Estimated): 69
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• Brazil
  • SP
    • São Paulo, SP, Brazil, 03155-000
      • Recruiting
      • Nove de Julho University
      • Contact: Sandra K Bussadori, PhD; Phone Number: +55 11 2633-9000; Email: sandra.skb@gmail.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 years to 12 years (Child)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Healthy children with no adverse systemic conditions;
• At least one permanent first molar with MIH and active caries on the dentin with post-eruptive fracture on a single surface or multiple surfaces with an indication for restorative treatment; direct view and access; no clinical or radiographic signs or symptoms of pulpal involvement;
• Hypomineralized enamel with opacities near the margins of the cavities;
• Occurrence or non-occurrence of dentinal sensitivity.

Exclusion Criteria:

• Clinically: carious lesion only involving the enamel, deficient restorations, small carious lesions in dentin (without access to manual excavator), hidden caries, clinical sign or symptom of pulpal involvement, clinical impossibility of restoration;
• Radiographically: evidence of pulpal involvement;
• Teeth severely affected by MIH without indication for restorative treatment;
• Partially erupted teeth with MIH.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Control group; The participants will receive selective removal of carious dentinal tissue using a curette.	Procedure: Conventional caries treatment; Selective removal of carious tissue with curette + restoration.
Experimental: Antimicrobial PDT and Papacarie Deproteination Group; The participants will receive selective chemical-mechanical removal of carious dentinal tissue around the walls of the cavity using a curette, followed by the application of antimicrobial PDT and deproteination with Papacárie DuoTM.	Procedure: Antimicrobial PDT and Papacarie Deproteinization; Selective removal of carious tissue with curette + antimicrobial PDT (methylene blue 5 Evilux, Color index 52015, Fórmula & Ação + red laser at 660 nm) + deproteinization of enamel with Papacárie DuoTM + restoration.
Experimental: Antimicrobial PDT group and deproteination with NaClO 5% group; The participants will receive selective removal of carious dentinal tissue using a curette, followed by application of antimicrobial PDT and deproteination with NaClO 5%.	Procedure: Antimicrobial PDT and 5% NaOCl Deproteinization; Selective removal of carious tissue with curette + application of methylene blue and low-level laser (aPDT) + deproteinization of adjacent enamel with 5% NaOCl + restoration.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in retention of the restorative material in the cavity	The effects of deproteination on the longevity of the restoration will be evaluated using the modified USPHS index, in which retention, marginal integrity, marginaldiscoloration, anatomic form and secondary caries are evaluated.	48 hours after the restorative treatment and at three-months intervals for a period of 12 months of follow up.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in microbiological evaluation	Prior to the removal of the carious tissue, a sample infected dentin will be collected from each selected tooth. Immediately after the removal of the carious tissue and the application of aPDT, a sample of the remaining dentin will be collected. The results will be expressed as colony-forming units of SM and LB as well as proportion of streptococci (% S/TM), streptococci of the mutans group (% SM/TM) and lactobacilli (% LB/TM) in relation to the total of viable microorganisms. For SM, the proportion in relation to the total of streptococci (% SM/S) will also be calculated.	Baseline and immediately after treatment.
Change in Dental Sensitivity	Prior to the removal of the carious tissue, the volunteers in the different groups will indicate the degree of pain or discomfort on the visual analog scale (VAS) following isolation of the neighboring teeth and the application of compressed air to the tooth with MIH for 3 seconds.	Baseline, 48 hours after the restorative treatment and at three-months intervals for a period of 12 months of follow up.

Collaborators and Investigators

• Sponsor: University of Nove de Julho

Study record dates

Study Major Dates

• Study Start (Actual): August 20, 2023
• Primary Completion (Estimated): December 20, 2023
• Study Completion (Estimated): March 20, 2024

Study Registration Dates

• First Submitted: June 29, 2022
• First Submitted That Met QC Criteria: June 29, 2022
• First Posted (Actual): July 5, 2022

Study Record Updates

• Last Update Posted (Actual): November 28, 2023
• Last Update Submitted That Met QC Criteria: November 22, 2023
• Last Verified: November 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Congenital Abnormalities; Stomatognathic Diseases; Tooth Diseases; Stomatognathic System Abnormalities; Tooth Abnormalities; Dental Enamel Hypomineralization; Developmental Defects of Enamel; Molar Hypomineralization; Anti-Bacterial Agents; Anti-Infective Agents
• Other Study ID Numbers: AmandaHMI

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: The information collected from the participants will be transcribed into a database replacing the individuals' names with the registration number of the evaluation form. The datasets (Excel spreadsheets) generated from this protocol will be available from the corresponding author (Sandra Kalil Bussadori - sandra.skb@gmail.com) upon any reasonable request. However, reuse of this data will not be permitted for anyone who is not an author of this paper.
• IPD Sharing Time Frame: The data will be available as soon as the article with the findings will be published in a peer-reviewed journal.
• IPD Sharing Access Criteria: The datasets from this protocol will be available from the corresponding author (Sandra Kalil Bussadori -sandra.skb@gmail.com) upon any reasonable request.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; ANALYTIC_CODE; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No