Evaluation of Periodontal Ligament Distraction Using a Modified Surgical Technique for Retraction of Maxillary Canines

Not Applicable

Completed

• Conditions: Orthodontic Appliance Complication
• Interventions: Procedure: Periodontal ligament distraction

• Registration Number: NCT03535285
• Lead Sponsor: Cairo University

Brief Summary

Surgical modification technique try to get bodily movement during upper canine retraction.

Detailed Description

I- Original surgical technique (Liou and Huang technique, 1998) :

On the conventional surgical side, (the control side), the intersepital bone was undermined by two vertical cuts on the mesio-buccal and mesio-palatal line angles of the first premolar socket. They were connected at the base of the socket by an oblique cut. The surgical round bur was held parallel to the long axis of the canine and moved buccolingually, while shaving the interseptal bone buccolingual (back-and-forth) shaving movements were reduced the thickness of the interseptal bone by approximately 1 mm

II- Modified surgical technique:

In the surgical modification side, (the experimental side), intra-alveolar mesio-buccal and mesio-palatal cuts and interseptal bone shaving were done by surgical round bur and copious irrigation, without the oblique cut since it was done blindly in the original surgical technique. A buccal semilunar flap was opened on the apical area of canine-premolar region. The surgical pin helped also in location of the point of initial drilling of the apical horizontal cut from buccal approach, when the surgical pin's socket arm rested on the depth of the socket, the vestibular arm marked the point of access. It also estimated mesiodeistal extension of the apical horizontal cut. The apical horizontal cut was started from the socket apex to half way of the interseptal bone mesiodistally as an extension and for the depth, Mallet and Chisel were used from the cortical bone to reach the mesio-palatal cut. The flap was sutured. This surgical modification step provided more predictability and safer surgery than the blind oblique cut in the original surgical technique.

Study Timeline

• Study Start: 2017-06-15
• Primary Completion: 2017-08-15
• Study Completion: 2017-12-15
• Status Verified: 2018-05
• Study First Submitted: 2018-05-10
• Study First Submitted QC: 2018-05-14
• Last Update Submitted: 2018-05-23
• Study First Posted: 2018-05-24
• Last Update Posted: 2018-05-25

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

1. Orthodontic patients needed extraction of upper first premolars, with age range from 18 - 25 years old.
2. All patients were medically free. (See Appendix II)
3. No previous orthodontic treatment.
4. Adequate oral hygiene and periodontally healthy teeth.
5. The canines were almost leveled and aligned.
6. Maximum anchorage requirements.
7. Healthy canines; no deep carious lesions, no endodontic lesions, no root canal treatment, nor internal or external root resorption.
8. All patients were informed of the procedure and signed the consents.

Exclusion Criteria

Exclusion Criteria

Subjects were excluded from the study when:

1. They failed to keep several consecutive appointments.
2. Oral hygiene was subjectively judged as deteriorating during the preliminary stages of patient preparation.
3. Compliance with the instructions provided was inadequate.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Conventional surgery	Periodontal ligament distraction	Periodontal ligament distraction
Surgical modification side	Periodontal ligament distraction	Periodontal ligament distraction without the oblique cuts but with apical horizontal cut

Primary Outcome Measures

Name	Time	Method
Rotation of the canines	3-4 weeks	Digital models using 3shape scanner and Ortho-Analyzer software
Tipping of the canines	3-4 weeks	1. Periapical radiograph using Parallel technique (X-ray sensor , X-ray sensor holder \& Potable dental x-ray unit; 2. Panoramic radiograph .
Rate of canines retraction	3-4 weeks	Digital models using 3shape scanner and Ortho-Analyzer software

Secondary Outcome Measures

Name	Time	Method
Tipping of the molars	3-4 weeks	1. Periapical radiograph using Parallel technique (X-ray sensor , X-ray sensor holder \& Potable dental x-ray unit; 2. Panoramic radiograph.
Amount of anchorage loss	3-4 weeks	Digital models using 3shape scanner and Ortho-Analyzer software
The apical root resorption scores	3-4 weeks	Periapical radiograph using Parallel technique (x-ray sensor, X-ray sensor holder \& Potable dental x-ray unit
Gingival index	3-4 weeks	Periodontal probe
Pain	3-4 weeks	Numeric rating scale (NRS) for pain
Pulp Vitality	3-4 weeks	Cold application (Ethyl Chloride)
Periodontal index	3-4 weeks	Periodontal probe

Trial Locations

Locations (1)

Cairo University - Orthodontic department; 🇪🇬 Cairo, Egypt