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Clinical Trial Details — Status: Not yet recruiting

Administrative data

NCT number NCT04353635
Other study ID # 732092017
Secondary ID
Status Not yet recruiting
Phase
First received
Last updated
Start date June 1, 2020
Est. completion date October 1, 2020

Study information

Verified date April 2020
Source Ain Shams University
Contact Nehal Shobair, master
Phone 00201063666985
Email nehal.shobair@gmail.com
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

Patients with class III dentofacial deformity who are in need of surgical correction are now able to see the potential changes to their faces before the actual operation. Dolphin 3d is one of the few software packages that is used for orthognathic planning and prediction of soft tissue changes. The direct effect of the prediction procedure over patient's and surgeon decisions makes it important to guarantee a high level of accuracy of operational results prediction. This study is designed to investigate the accuracy of Dolphin 3d software for the prediction of postoperative soft tissue changes following specific surgical procedure which is the combined maxillary advancement and mandibular setback, commonly used for correction of class III facial deformity cases. The study data will be collecting retrospectively. The difference between the pre-operative soft tissue prediction and the 6-month postoperative results will be analysed. The results of this study will help to determine whether this software package is accurate enough to be considered as a surgical assistance tool helping both surgeons and patients in treatment planning and decision-making procedure respectively.


Description:

The study will employ the pre-existing CBCT images routinely captured for orthognathic surgery patients in Glasgow dental hospital and school.

The CBCT scans of class III patients who undergone maxillary advancement with minimal or without impaction and mandibular setback will be identified.

The preoperative and 6 months postoperative CBCT images will be anonymised The surgical planning and soft tissue prediction will be performed on the preoperative images using Dolphin3d software.

The resultant soft tissue 3D model will be superimposed on the actual postoperative soft tissue model.

Analysis of the difference between the prediction and the actual postoperative will be performed to quantify the difference between them in order to assess the accuracy of the software prediction.

The sample will be collected according to the inclusion and exclusion criteria. Pre and post operation CBCT voxel based super imposition using ONDEMAND 3d. The surgical movement will be quantified using direct slice land-marking . Using the pre-operattion CBCT to do the surgical mock up and the soft tissue simulation on dolphin 3D.

Segment the soft tissue of the prediction. Soft tissue surface models of the simulation and the actual postoperative images were generated and exported as STLs.

Generic meshes conformation dense correspondence analysis. Superimposition of the predicted and the post operative STLs. Using VR mesh software, the mesh will be segmented into pre-identified anatomical regions.

The distance between the corresponding vertices will be displayed as a colour scale in milli-meter and will be analysed in the individual dimension of space (x, y and z) using in-house software and each dimension will be displayed as a colour coded distance map.


Recruitment information / eligibility

Status Not yet recruiting
Enrollment 12
Est. completion date October 1, 2020
Est. primary completion date August 1, 2020
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 50 Years
Eligibility Inclusion Criteria:

1. Patients who have class III facial deformity to be corrected using bimaxillary orthognathic surgery.

2. No medical problems that might interfere with general anesthesia or interfere with bone and soft tissue healing.

Exclusion Criteria:

1. There are craniofacial anomalies including cleft lip/palate,

2. Patient have previous maxillofacial operations or facial scars,

3. Correction mandates multi-segment Le Fort I osteotomies,

4. There are orthodontic appliances in place at the time of T1 records.

5. Genioplasty is recommended for deformity correction.

6. There is facial Asymmetry.

Study Design


Related Conditions & MeSH terms


Intervention

Device:
dolphin 3d
software

Locations

Country Name City State
n/a

Sponsors (2)

Lead Sponsor Collaborator
Ain Shams University University of Glasgow

Outcome

Type Measure Description Time frame Safety issue
Primary The difference between prediction and actual postoperative The difference between prediction and actual postoperative. The distance between the corresponding vertices will be displayed as a colour scale in milli-meter and will be analysed in the individual dimension of space (x, y and z) using in-house software and each dimension will be displayed as a colour coded distance map. 6 months
Secondary The distance between the corresponding vertices Tthe secondary outcome measures will be the distance between the corresponding vertices which will be displayed as a colour scale in milli-meters 6 months
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