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The Effect of Decoupling With Time Technique on the Clinical Performance of Proximal Posterior Composite Restorations (DWT)

30. oktober 2026 opdateret af: Mahetab Mahmoud, Cairo University

The Effect of Decoupling With Time Technique on the Clinical Performance of Proximal Posterior Composite Restorations: An 18-Month Randomized Clinical Trial

This randomized clinical trial will evaluate whether the decoupling with time technique improves the clinical performance of Class II posterior composite restorations compared with conventional composite restoration techniques. The study will also assess postoperative hypersensitivity and the additional operative time required to perform the decoupling with time technique. Participants will receive a posterior composite restoration and will be followed for 18 months. Clinical performance will be evaluated using the Modified United States Public Health Service (USPHS) criteria, and postoperative hypersensitivity will be assessed before treatment, 1 week after restoration placement, and at 6, 12, and 18 months. The study will help determine whether the additional time required for the decoupling with time technique is associated with improved clinical outcomes.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This randomized clinical trial will evaluate the effect of the decoupling with time technique on the clinical performance of posterior composite restorations in Class II cavities.

The study will include eligible participants requiring posterior Class II composite restorations. Participants will be randomly allocated to either the decoupling with time group or the conventional restoration group.

In the decoupling with time group, following cavity preparation, immediate dentin sealing will be performed using a universal adhesive system applied with a selective enamel-etching strategy. A conventional flowable resin composite will then be applied as an initial stress-reducing layer with a thickness of approximately 0.5-1.0 mm. A 5-minute waiting period will be allowed before completion of the composite restoration. Deep margin elevation will not be performed as part of the study protocol.

The control group will receive a conventional posterior composite restoration according to the standardized restorative protocol without the decoupling with time waiting period.

The primary outcome will be postoperative hypersensitivity, assessed using the Modified United States Public Health Service (USPHS) criteria. Hypersensitivity will be assessed pre-operatively, at 1 week after restoration placement, and at 6, 12, and 18 months after restoration placement.

The clinical performance of the restorations will be evaluated using the Modified USPHS criteria immediately after restoration placement and at 6, 12, and 18 months. The evaluated clinical parameters will include marginal integrity, fracture and retention, marginal discoloration, anatomic form, proximal contact, surface texture, radiographic evaluation, and secondary caries.

The total operative time required to complete each restoration will also be recorded in minutes using a digital stopwatch, starting from the beginning of the restorative procedure and ending upon completion of the restoration. This will allow assessment of whether the additional operative time associated with the decoupling with time technique is associated with improved clinical outcomes.

Participants will be followed for 18 months to evaluate the clinical performance of the restorations and postoperative hypersensitivity over time.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

50

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

20 år til 40 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Patients aged between 20 and 40 years.
  • Patients with posterior carious Class II lesions.
  • Good oral hygiene.
  • Favorable occlusion.
  • Absence of deleterious oral habits.

Exclusion Criteria:

  • Teeth showing signs of irreversible pulpitis.
  • Teeth with secondary caries.
  • Teeth with old restorations.
  • Endodontically treated teeth.
  • Patients with a history of adverse reactions to the test material.
  • Patients with poor oral hygiene.
  • Patients with systemic disease.
  • Patients with severe periodontal disease.
  • Uncooperative patients.
  • Patients unable to attend the scheduled recall visits.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Decoupling With Time Group

Participants assigned to this group will receive a Class II posterior composite restoration using the decoupling with time technique. Immediate dentin sealing will be performed using a universal adhesive system with a selective enamel-etching strategy, followed by application of a 0.5-1.0 mm layer of conventional flowable resin composite. A 5-minute waiting period will be allowed before completion of the composite restoration.

Immediate dentin sealing using a universal adhesive system with a selective enamel-etching strategy, followed by application of a 0.5-1.0 mm layer of conventional flowable resin composite and a 5-minute waiting period before completion of the posterior composite restoration.

Aktiv komparator: Conventional Composite Group

Participants assigned to this group will receive a conventional Class II posterior composite restoration without the decoupling with time procedure or the additional 5-minute waiting period.

Conventional Class II posterior composite restoration without the decoupling with time procedure.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Postoperative Hypersensitivity
Tidsramme: Pre-operatively, 1 week, 6 months, 12 months, and 18 months after restoration placement.

Postoperative hypersensitivity will be assessed clinically using the Modified United States Public Health Service (USPHS) criteria. The assessment will be performed before the restorative procedure and at the specified follow-up visits after restoration placement.

Pre-operatively, 1 week, 6 months, 12 months, and 18 months after restoration placement.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Clinical Performance of Posterior Composite Restorations
Tidsramme: Immediately after restoration placement, 6 months, 12 months, and 18 months after restoration placement.

Clinical performance of the restorations will be evaluated using the Modified United States Public Health Service (USPHS) criteria. The evaluated parameters will include marginal integrity, fracture and retention, marginal discoloration, anatomic form, proximal contact, surface texture, radiographic evaluation, and secondary caries.

Immediately after restoration placement, 6 months, 12 months, and 18 months after restoration placement.
Total Operative Time
Tidsramme: During the restorative procedure.

The total time required to complete each restorative procedure will be measured in minutes using a digital stopwatch, starting from the beginning of the restorative procedure and ending upon completion of the restoration.

During the restorative procedure.

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. november 2026

Primær færdiggørelse (Anslået)

1. maj 2028

Studieafslutning (Anslået)

1. maj 2028

Datoer for studieregistrering

Først indsendt

30. oktober 2026

Først indsendt, der opfyldte QC-kriterier

30. oktober 2026

Først opslået (Faktiske)

4. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • Cons-DWT-C.Perf-2026

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