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Completed

NCT Number: NCT04878939

Evaluation of Incisors' Position Following Anterior Segment Retraction

There's scarcity in literature concerning the issue of anterior segment retraction technique and its effect on anterior teeth position. Therefore, a randomized clinical trial has been chosen to investigate this issue, aiming to support clinicians with the best guidelines for anterior segment retraction.

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Key information

Conditions

Bimaxillary Protrusion

Age range

13 year–25 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Future University in Egypt

Cairo, Egypt

About this study

Thirty females with bimaxillary protrusion were randomly allocated into two groups. In one group, anterior segment retraction was commenced using an elastomeric chain rendering 160 g/side extending between mini-screw implant and a hook crimped on 0.017- by 0.025-inch stainless steel wire distal to the lateral incisor. In the other group, anterior segment retraction was done using closing T-loops fabricated from 0.017- by 0.025-inch titanium molybdenum alloy (TMA) wire rendering comparable retraction force. Three-dimensional analysis of incisors' buccolingual (BL)- torque, mesiodistal (MD)- tip, vertical position changes and root resorption were assessed using cone beam computed tomography scans.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Female patients (Age 13- 25 y)
  • Class I molar relation (Angle's classification)
  • Bimaxillary protrusion requiring extraction of four first premolars and maximum anchorage.
  • full permanent dentition (except 3rd molars)
  • Good general and oral health

Exclusion criteria

  • Systemic disease or syndromes or on anti-inflammatory medication.
  • Extracted or missing permanent teeth (other than 3rd molars)
  • Badly decayed teeth (other than 1st premolars)
  • Parafunctional habits
  • History of previous orthodontics treatment

Treatment and study plan

Power chain used for anterior segment retraction

Other

Elastomeric chain rendering 160 g/side extending between mini-screw implant and a hook crimped on 0.017- by 0.025-inch stainless steel wire distal to the lateral incisor.

T-loop fabricated to perform anterior segment retraction

Other

In the frictionless group, anterior segment retraction was done using closing T-loops fabricated from 0.017- by 0.025-inch titanium molybdenum alloy (TMA) wire rendering comparable retraction force.

Primary outcomes

  1. Torque of the incisors

    Time frame: through study completion (Pre/post retraction), an average of 6 months

    The change of the outer angle between long axis of each upper anterior tooth and palatal plane on CBCT pre and post retracation and the change in the outer angle between long axis of each lower anterior tooth and horizontal plane on CBCT pre and post retracation

  2. Tip of the incisors

    Time frame: through study completion (Pre/post retraction), an average of 6 months

    The change of the angle between the long axis of the incisors and mid-sagittal plane on CBCT pre and post retracation

  3. Vertical changes of the incisors

    Time frame: through study completion (Pre/post retraction) , an average of 6 months

    The change of the linear distance between the centroid of each maxillary anterior tooth and palatal Plane on CBCT pre and post retracation and The change of the linear distance between centroid of each mandibular anterior tooth and horizontal Plane on CBCT pre and post retracation

Secondary outcomes

  1. Root resorption of the anterior teeth

    Time frame: through study completion (Pre/post retraction), an average of 6 months

    measuring the amount of resorption using CBCT in mm pre and post retraction

Sponsors and collaborators

Lead sponsor

Future University in Egypt

Other

Registry information

Official study title

Evaluation of Incisors' Position Following Anterior Segment Retraction Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial

Important dates

Study start
2019
Primary completion
2020
Study completion
2020
First posted
May 10, 2021
Registry last updated
May 10, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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