The Use of a Modified Dentoalveolar Distractor to Retract Maxillary Canines

Damascus University8 enrolled

Overview

In this study, two distractors will be used to retract maxillary canines into the extraction sites. The first distractor is a modified Hyrax expander with two arms soldered to two bands connected to a canine and a molar; and the second one is a similar to the first one but with the addition of a third arm. The purpose of this investigation is to compare the two distractors in terms of: final position of the canine, canine pulp vitality, molars' anchorage, patient's acceptance to the appliance.

The retraction of the canines is one of the longest and most important stages in the orthodontic treatment of cases that require premolars extraction. The retraction phase of the canines into an extraction site with conventional treatment method usually lasts about 4 to 6 months under normal circumstances. The use of dentoalveolar distraction (DAD) technique has been considered a very important step in this field. It has been shown by early case reports that this technique can be employed to retract canines within 10 to 14 days. Although DAD is thought to accelerate tooth movement during canine retraction, a significant amount of tipping (distal tilting) was observed in many case reports. So in this study, there is an intention to apply a modified DAD device on one side of the mouth and to compare it with the conventional one applied on the opposite side of the mouth in each participating patient.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Orthodontic Patients Requiring Canine Retraction

Interventions

modified dentoalveolar distractorDEVICE

Here, the modified distractor is going to be used when retracting the canine.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 25 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Indication for extraction of upper first premolar and conducting canine retraction * Good oral hygiene Exclusion Criteria: * Buccal or palatal inclination of the canines * Mesial or distal inclination of the canines * Contraindication to minor surgery * Previous orthodontic or surgical treatment * Root canal treatment to the canines * Malformation of the canines

Locations (1)

Department of Oral and Maxillofacial Surgery, University of Damascus Dental School

Damascus, Damscus, Syria

Outcomes

Primary Outcomes

Change in the mesiodistal inclination of the canine

This will be measured using a lateral cephalogram taken at these assessment times. The long axis of the canine will be drawn on the tracing of the cephalogram at each assessment time and this long axis will be measured with reference to anterior cranial base.

Time frame: This will be measured at three times: T0, one day before installing the distractor; T1, in the same day of finishing the retraction phase; T2, in the same day of device removal from the mouth.

Secondary Outcomes

Change in Canine Pulp Vitality

This variable is going to be measured clinically

Molars Anchorage Loss

This will be measured using cephalograms and study models

Time frame: Upper first molar position will be measured at three assessment times: T0, one day before installing the distractor; T1, in the same day of finishing the retraction phase; T2, in the same day of device removal from the mouth.

Patient acceptance to each distractor

Using a visual analog scale.

Time frame: This is going to be measured at: (T1) first day following surgery, (T2) five days following surgery, (T3) two weeks following surgery, and (T4) at the time of appliance removal.

Data from ClinicalTrials.gov

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