The Regulation of Osteoprotegerin by Mechanical Stimulation

NCT ID: NCT00155311

Last Updated: 2013-03-15

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

10 participants

Study Classification

INTERVENTIONAL

Study Start Date

2005-01-31

Brief Summary

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To test whether levels of OPG can be changed during orthodontic treatment. Alveolar bone samples will be collected from partially impacted third molars after orthodontic uprighting for different period of time in volunteers. In situ hybridization and immunohistochemistry analysis for OPG and RANKL will reveal their roles in this physiological process.

Detailed Description

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Long treatment time is a major factor causing high fee for orthodontic treatment. Patients would have dental caries or periodontitis resulted from improper oral hygiene care during this long treatment period. Therefore, how to speed up the tooth movement which determines the duration of orthodontic treatment, can help more people to obtain good occlusion and esthetics. Orthodontic force on tooth induces bone resorption on the compression side and bone deposition on the tension side, thus bone remodels and then tooth moves. Bone resorption is a complex process. Osteoblasts play an important role during initiation of bone resorption.

Changes OPG expression of osteoblasts under mechanical stimulation can play a role in bone remodeling. In order to test this hypothesis, the following specific aims will be achieved:

1. To test whether levels of OPG can be changed during orthodontic treatment. Alveolar bone samples will be collected from partially impacted third molars after orthodontic uprighting for different period of time in volunteers. In situ hybridization and immunohistochemistry analysis for OPG and RANKL will reveal their roles in this physiological process.
2. To optimize the regulation by changing magnitude and frequency of pressure, and characterize the time table for these changes..

Conditions

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Malocclusion

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Investigators

Study Groups

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days after treatment

different days after orthodontic treament, samples will be taken.

Group Type EXPERIMENTAL

orthodontic treatment

Intervention Type PROCEDURE

Interventions

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orthodontic treatment

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* patients with two mandibular impaction third molars containing at least one mesially angular impaction with crown exposed to the oral cavity

Exclusion Criteria

* pregnancy or diseases with abnormal bone metabolism
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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National Science and Technology Council, Taiwan

OTHER_GOV

Sponsor Role collaborator

National Taiwan University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Chung-Chen Yao, DDS, PhD

Role: PRINCIPAL_INVESTIGATOR

National Taiwan University Hospital

Locations

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Department of Dentistry, National Taiwan University Hospital

Taipei, , Taiwan

Site Status

Countries

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Taiwan

Other Identifiers

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9361700741

Identifier Type: -

Identifier Source: org_study_id

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