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Efficacy of Three Gingival Displacement Methods
Sponsor: Henan Provincial People's Hospital
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.
Official title: Efficacy of Three Gingival Displacement Methods: A Randomized Clinical Trial
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
39
Start Date
2025-12
Completion Date
2026-06-30
Last Updated
2025-12-15
Healthy Volunteers
No
Conditions
Interventions
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.
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.
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.
Locations (1)
department of stomatology, Henan provincial people's hospital, People's hospital Henan university.
Zhengzhou, Henan, China