MedTrace Logo

Efficacy of Three Gingival Displacement Methods

NCT07282977 · Status: ENROLLING_BY_INVITATION · Phase: NA · Type: INTERVENTIONAL · Enrollment: 39

Last updated 2025-12-15

No results posted yet for this study

Summary

The goal of this clinical trial is to find the best gingival displacement method for taking impressions of artificial full crowns with subgingival margins. The main question it aims to answer is:

Which of the three common gingival displacement methods works best? Researchers will compare three methods: gingival retraction cord, gingival retraction paste, and gingival retraction cord + hemostatic gel, to see which is optimal.

Participants will:

Receive one of the three gingival displacement treatments during impression taking.

Fill out a VAS form to rate their pain.

Conditions

  • Tooth Defect
  • Teeth Restoration

Interventions

PROCEDURE

gingival retraction cord

After tooth preparation, the prepared abutment tooth was rinsed and dried. A preliminary impression was taken using heavy-body silicone. An appropriately sized retraction cord (Ultrapak, #000-#0) was selected and gently packed into the gingival sulcus of the prepared tooth using a cord packer. The cord was left in the gingival sulcus for 7-8 minutes. Following cord removal, light-body silicone was immediately injected around the gingival sulcus of the prepared abutment tooth and into the preliminary impression tray, followed by seating of the preliminary impression tray to obtain the final impression.

PROCEDURE

gingival retraction paste

After tooth preparation, the prepared abutment tooth was rinsed and dried. A preliminary impression was taken using heavy-body silicone. Retraction paste was injected into the gingival sulcus surrounding the prepared abutment tooth. The retraction paste was left in place for 2 minutes per the manufacturer's instructions, then thoroughly rinsed, and the prepared abutment tooth was air-dried. Light-body silicone was immediately injected around the gingival sulcus and into the preliminary impression tray, followed by seating of the preliminary impression tray to obtain the final impression.

PROCEDURE

gingival retraction cord+hemostatic gel

Appropriately sized retraction cords (Ultrapak, sizes #000-#0) were pre-soaked in hemostatic gel prior to use. After tooth preparation, the prepared abutment tooth was rinsed and dried. A preliminary impression was taken using heavy-body silicone. The gel-soaked retraction cords were gently packed into the gingival sulcus using a cord packer. After 7-8 minutes, the cords were removed, followed by rinsing and drying of the prepared abutment tooth. Light-body silicone was immediately injected around the gingival sulcus and into the preliminary impression tray, followed by seating of the preliminary impression tray to obtain the final impression.

Sponsors & Collaborators

  • Henan Provincial People's Hospital

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-12-31
Primary Completion
2026-06-30
Completion
2026-06-30

Countries

  • China

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07282977 on ClinicalTrials.gov