- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03657498
In Vivo Assessment of Natural Tooth Color After Orthognathic Surgery. A Pilot Controlled Clinical Trial
In Vivo Assessment of Natural Tooth Color, Pulp Vitality and Root Morphology After Combined Orthodontic-orthognathic Surgery Involving Maxillary Le Fort I Osteotomy
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The method of natural tooth color assessment included the use of the spectrophotometer Spectroshade Micro (MHT Zurich, Switzerland), which is a reflectance spectrophotometer with a LED technology light source with an output of 410-680 nm that is transformed into monochromatic light (λ = 400-720 nm) by means of grating. On this type of spectrophotometers, light is split so that teeth can be illuminated simultaneously from two sides at a 45° angle with the use of an intra-oral camera. The reflected light is directed at 0° on two detector areas (each detector area surface is of 18 x 13 mm2). One detector area is a color CCD chip responsible for the generation of the colored video image. A black-and-white CCD detector area records the spectrophotometric data. During a measuring process, light originating from the monochromator of the device is emitted in 10-nm intervals. Resulting images consist of 300,000 pixels. Initially, CIE tristimulus values are calculated and then converted to CIE-Lab values with the use of the accompanying software. Prior to every measuring cycle, the spectrophotometer had to be calibrated to a white and a green ceramic tile that are incorporated on the base of the device by the manufacturer.
Assessments were performed with closed lips in order to exclude disturbance by daylight. In order to avoid methodical errors in the assessment of luminance teeth of the upper and lower dental arches were not in contact, thereby obtaining a uniform black background by the oral cavity without an overlapping of anterior teeth. Tooth color was measured in the study and in the control groups at Time point 1 and Time Point 2. To enhance reliability of the method two sequential pictures of each tooth (Left + Right) were obtained with the use of the spectrophotometer and imported to the dedicated MHT Spectroshade software v3.01 Build 1007a (MHT Zurich, Switzerland), licensed to Aristotle University (Station ID: 952317337-Serial NR LUA164-164-164). Using the synchronization tool followed by the synchronous measurement tool, the cursor was accurately positioned on the center of the clinical crown on both pictures simultaneously, and the software reported color measurements for both pictures. The cursor shape was a circle, while the size was set at 100 pixels. Due to the synchronization of the pictures, the cursor area was exactly the same for both. To consider the method reliable, the maximal allowed color difference between the two consecutive pictures, was set at ΔΕ≤1.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Absence of plaque accumulation and gingival inflammation. The Haemorrhagic index and Plaque index should be lower than 15 %.
- Absence of dental caries, prosthetic restorations, decalcifications, intrinsic and ⁄ or extrinsic discolorations, as well as morphologic ⁄ anatomical deviations in the measured teeth.
- Absence of severe crowding in the upper and lower dental arches (crowding should be lower than 4 mm).
Exclusion Criteria:
- Previous orthodontic treatment
- smoking
- previous bleaching procedure
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Screening
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Study group
Combined orthodontic-orthognathic treatment
|
combined treatment including orthodontics and orthognathic surgery
|
No Intervention: Control Group I
No intervention
|
|
Active Comparator: Control Group II
Standard orthodontic treatment
|
treatment with standard orthodontic procedures
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Tooth color parameter L* change
Time Frame: Up to 49 months
|
Lightness parameter of CIE-L*a*b* system
|
Up to 49 months
|
Tooth color parameter a* change
Time Frame: Up to 49 months
|
Green-red component of CIE-L*a*b* system
|
Up to 49 months
|
Tooth color parameter b* change
Time Frame: Up to 49 months
|
Blue-Yellow component of CIE-L*a*b* system
|
Up to 49 months
|
Collaborators and Investigators
Investigators
- Principal Investigator: Konstantinos Lazaridis, Dr, Aristotle University Of Thessaloniki
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 264/02.11.2010
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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