The Efficacy of Different Gingival Displacement Methods Before Definitive Digital Impression

Summary

This study aims to evaluate and compare the efficacy of four methods in achieving vertical and horizontal gingival tissue displacement to be captured by optical digital impression. Moreover, the effect of the gingival displacement methods on the periodontal tissues around the final restoration will be assessed.

Conditions

• Gingival Displacement

Interventions

DEVICE

Laser troughing

Laser troughing will be carried out by passing laser optic fiber in contact mode along the gingival sulcus. Laser energy will be delivered with a wavelength of 980nm and power of 0.8W, in continuous mode. Laser tip will be inserted 1mm into the gingival sulcus, to facilitate an accurate recording of finish line

OTHER

Retraction cord and astringent

Partial isolation of the tooth with cotton rolls and saliva ejector will be performed. Appropriate size of retraction cord will be soaked in astringent for 5 mins. Then packing of the cord will be started from the mesial interproximal area by gently packing into the sulcus with the gingival cord packer instrument using the single cord technique. Retraction cord will be kept in place for 5 minutes. Cord will be removed immediately before the start of the intraoral scan

OTHER

Cordless retraction paste with astringent

The cordless paste with astringent will be injected gently into the sulcus, leaning on the tooth at the point of the cervical limit and not on the gingiva, the cannula will remain parallel to the axis of the tooth to exert optimal pressure. Then it will removed after 5 mins with copiously irrigated water until no traces of the materials left.

OTHER

Cordless retraction paste without astringent

The cordless paste without astringent 10 will be injected into the sulcus of the gingiva. The suitable size of Comprecap will be held on the abutment to push the material deep into the sulcus of the gingiva, and the participants will be informed to bite over it for a period of 3 to 5 minutes. After 5 minutes, the comprecap with the set retraction material attached to it, will be removed from the patient mouth.

Sponsors & Collaborators

• Alexandria University

  lead OTHER

Principal Investigators

• Mohamed F Elashry, MSc · Alexandria University

• Sanaa Hussein, PhD · Alexandria University

• Ihab Hammad, PhD · Alexandria University

• Rania Fahmy, PhD · Alexandria University

• Islam M Abdel Raheem, PhD · Alexandria University

Study Design

Allocation

RANDOMIZED

Purpose

OTHER

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

25 Years

Max Age

40 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2022-06-01

Primary Completion

2023-08-01

Completion

2023-08-30

Countries

• Egypt

Study Locations