Single Versus Repeated Piezocision-assisted Orthodontic Tooth Movement

Not Applicable

Completed

• Conditions: Orthodontic Tooth Movement; Canine Retraction

• Registration Number: NCT05782088
• Lead Sponsor: Nourhan M.Aly

Brief Summary

The primary aim of the study is to evaluate the effect of single and repeated piezocisions on the rate of orthodontic tooth movement. Secondary aims are to evaluate the effect of both protocols on molar anchorage loss, as well as on canine root resorption.

Detailed Description

Not available

Study Timeline

• Study Start: 2023-01-01
• Study First Submitted: 2023-03-12
• Study First Submitted QC: 2023-03-12
• Study First Posted: 2023-03-23
• Primary Completion: 2024-01-01
• Study Completion: 2024-01-15
• Status Verified: 2024-03
• Last Update Submitted: 2024-03-24
• Last Update Posted: 2024-03-26

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

• Malocclusion that requires at least the extraction of maxillary first premolars, such as Class I bimaxillary protrusion, and Class II division 1 cases.
• Normal shape and structure of the maxillary canines, with no history of root canal treatment

Exclusion Criteria

• Patients who underwent previous orthodontic treatment.
• Patients currently receiving drug therapy that may affect orthodontic tooth movement, e.g. hormonal therapy and corticosteroids.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Measurement of molar anchorage loss	12 weeks	Perpendicular lines will be drawn from the central fossae of both maxillary right and left first molars to the mid-palatal raphe. Consequently, molar anchorage loss will be calculated by measuring the distance between those lines, and the lines representing the third rugae as previously mentioned.
Measurement of canine root resorption	12 weeks	Root resorption of the maxillary canines will be evaluated and measured by comparing pre-retraction and post-retraction CBCT scans.
Alveolar bone volume	12 weeks	From the pre- and post-retraction CBCTs (at T0 and T1), bone volume in areas of the maxillary alveolar process surrounding the canines will be measured using a special software.
Measurement of canine retraction	12 weeks	Several landmarks will be identified on the dental arch, including the mid-palatal raphe, the most medial points on the third right and left rugae, and the cusp tips of the right and left maxillary canines. Perpendicular lines will be drawn from the medial points of the right and left third rugae, and the cusp tips of the right and left maxillary canines to the mid-palatal raphe. The antero-posterior measurements will be carried out between the canine lines and the third rugae lines bilaterally, to assess the rate of canine retraction.
Bone Microstructure (Fractal Dimension)	12 weeks	Using the collected CBCT scans, the region of interest will be selected within the maxillary alveolar process, and the fractal dimension analysis will be performed using a special software for the maxillary canines in the experimental and control groups.
Alveolar bone density	12 weeks	From the acquired pre- and post-retraction CBCTs, bone density will be measured form a coronal cross-section of the maxillary arch around each canine in the experimental and control groups.
Alveolar bone thickness	12 weeks	The buccal bone thickness will also be measured at three points from the buccal bone to the root, at the coronal, mid-root, and apical level for each maxillary canine
Maxillary canine tipping	12 weeks	Tipping of the maxillary canine during retraction was evaluated by drawing vertical lines on the palatal surfaces of the lateral incisor and the canine that extend from the middle of the incisal edge of the lateral incisor and the cusp tip of the maxillary canine to the middle of the cervical line of each, thereby dividing each of them into equal halves. The distance between the lateral incisor and the canine was assessed at two points on their clinical crowns: incisal, and cervical, enabling the detection of crown tipping of the canine during retraction if there was a difference in the measurements between the both the assessed levels.

Trial Locations

Locations (1)

Faculty of Dentistry, Alexandria University; 🇪🇬 Alexandria, Egypt