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Not yet recruitingNCT06606379Updated Sep 23, 2024

Impact of Different Separation Methods on Proximal Contact Tightness and Contour of Compound Class ii

An interventional study of I1 (Intervention) and I2 (Intervention) in Proximal Caries, sponsored by Cairo University. Not yet recruiting. Open to participants aged 25 Years to 40 Years. Per ClinicalTrials.gov, last updated 2024-09-23.

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

From the registry’s dates

  • Primary completion was expected by Jun 2025, 1 year 3 months ago, but the record still lists the study as not yet recruiting.
Phase
Not applicable
Study type
Interventional
Enrollment
160
Allocation
Randomized
Ages
25 Years to 40 Years
Sex
All
01

Study summary

The aim of this study is to evaluate the interdental separation of various separation systems and their impact on the proximal contact tightness and contour in compound class II nanohybrid resin composite restorations.

Read the detailed description

The target population consists of adult patients aged 25-40, with posterior compound proximal carious cavities (ICDS score 4 or 5) in molars. The interventions under investigation include three different separation systems: the Resin ring (DR-Resin ring, Egypt), Elliot separator (Pfingst \& Co, USA), and Stainless Steel Metal ring (TOR VM ring, Russia). These systems will be compared to a Nickel titanium 3D-fusion ring (Garrison, USA). The primary outcomes assessed are proximal contact tightness and form/contour, measured visually according to FDI criteria, with scoring systems adapted from Hickel et al. (2023). Secondary outcomes, such as patient comfort (measured by a pain rating scale), and the emergence profile (assessed via bitewing radiographs), will also be considered. Data will be collected immediately postoperatively (T0), at 30 days (T1), and after 6 months (T2). The study will be conducted as a randomized clinical trial. The null hypothesis suggests that there will be no significant differences in proximal contact tightness or contour across the different separation systems used.

02

Conditions studied

  • Proximal Caries
03

In context

Lead sponsor

Cairo University is the lead sponsor of 4,780 studies on the registry; 1,427 are open to participants now.

Of its 36 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
25 Years to 40 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Individuals with posterior compound proximal carious cavities in molars.
  2. Age of (25-40) years.
  3. Molars with compound proximal carious cavities score 4 or 5 ICDS.
  4. Vital upper or lower posterior teeth with no signs of irreversible pulpitis.
  5. Presence of adjacent and opposing teeth with normal occlusion

Exclusion criteria

Exclusion Criteria:

  1. Patients with major systemic disorders or xerostomia.
  2. Patients with periodontal disease.
  3. Patients with para-functional habits.
  4. Presence of malocclusion or signs of pathological teeth wear
  5. Non vital teeth or teeth with signs of pulpal pathology.
  6. Teeth mobility or clinical attachment loss.
05

Study design

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

Study arms

  • Active comparator
    C (comparator)

    Nickel titanium 3D-fusion ring (Garrison, USA)

    Device: C (comparator)

  • Experimental
    I1 (Intervention)

    Resin ring (DR- Resin ring, Egypt)

    Device: I1 (Intervention)

  • Experimental
    I2 (Intervention)

    Elliot separator (Pfingst \& Co, South Plainfield, NJ, USA)

    Device: I2 (Intervention)

  • Experimental
    I3 (Intervention)

    Stainless Steel Metal ring (TOR VM ring, Moscow, Russia)

    Device: I3 (Intervention)

Interventions

  • DeviceI1 (Intervention)

    Resin ring (DR- Resin ring, Egypt)

  • DeviceI2 (Intervention)

    Elliot separator (Pfingst \& Co, South Plainfield, NJ, USA)

  • DeviceI3 (Intervention)

    Stainless Steel Metal ring (TOR VM ring, Moscow, Russia)

  • DeviceC (comparator)

    Nickel titanium 3D-fusion ring (Garrison, USA)

06

What researchers measure

Primary outcomes

  1. Proximal Contact tightness (Success rate)

    Visual examination and 25-/50-/100-µm blade according to FDI Criteria

    Time frame: From enrollment to the end of treatment at 6 months

Secondary outcomes

  1. Form and Contour

    Visual examination according to FDI Criteria

    Time frame: From enrollment to the end of treatment at 6 months

  2. Patient Comfort

    Pain rating scale

    Time frame: From enrollment to the end of treatment at 6 months

  3. Emergence profile

    Bitewing Radiographs

    Time frame: From enrollment to the end of treatment at 6 months

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

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 23, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06606379
Lead sponsor
Cairo University
Responsible party
Hadeer Hesham Mohamed (Dr. Hadeer Hesham, Cairo University) — Principal investigator
First posted
Sep 23, 2024
Start date
Jan 1, 2025 (estimated)
Primary completion
Jun 30, 2025 (estimated)
Completion
Jan 1, 2026 (estimated)
Last update
Sep 23, 2024

Study contacts

Hadeer H Mohamed, MSC. degree
Contact
hadeer.hesham@dentistry.cu.edu.eg
+20 1015779373
Omnia A Amin, MSC. degree
Contact
omnia.abdellatif@dentistry.cu.edu.eg
+20 1272512839
Hadeer H Mohamed, MSC. degree
principal investigator · Assistant Lecturer of Conservative Dentistry, Faculty of Dentistry Cairo University, Egypt.

Oversight

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

Not currently enrolling

This study is not yet recruiting, as verified in Sep 2024. You cannot join it, but the record below documents what was studied.

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