Effect of Segmentation Techniques (Manual Versus Semiautomatic) on the Accuracy of the Reconstructed Mandibular Condyle Using CBCT

Cairo University (CU)

Status: Enrolling

Conditions: Segmentation Techniques

Treatments: Radiation: CBCT radiation

Study type: Interventional

Funder types: Other

Identifiers

NCT05435417

RAD 7:1-1

Details and patient eligibility

About

Effect of Segmentation Techniques (Manual versus Semiautomatic) on the Accuracy of the Reconstructed Mandibular Condyle using CBCT

Full description

It will be used to segment the mandibular condyle and asses its volumetric and linear measurements. Therefore, the accuracy of the segmentation techniques of the mandibular condyle will be determined

Enrollment: 29 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• Intact dry human skulls and mandibles.

Exclusion criteria

• Presence of fracture, pathological lesions, or skeletal deformities in the condylar area.

Trial design

Primary purpose: Diagnostic

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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29 participants in 3 patient groups

Manual segmentation technique of CBCT images of the condyles.

Experimental group

Description:

Using the manual edition built in tool, first a brush of small size will be used to demarcate the outline of the condyle in the sagittal cuts. Then shading the demarcated condylar area with a brush of larger size in each slice. The outline of the condyle will be refined on all cuts. The software built in tool 'create surface' will be used to create the segmented 3D volume

Treatment:

Radiation: CBCT radiation

Semiautomatic segmentation technique of CBCT images of the condyles.

Experimental group

Description:

Using the water shed built in tool, first a brush of small size will be used to demarcate the outline of the condyle by the 'background' option in all planes. Then using the 'foreground' option, a brush of larger size will be used to shade the condylar area. The software built in tool 'expand water shed' will be used to include the whole condyle. At last, 'create surface' option will be used to create the segmented 3D volume.

Treatment:

Radiation: CBCT radiation

Actual physical measurements of the condyles on the dry mandibles

No Intervention group

Description:

For linear measurements, actual physical measurements will be done on the dry mandibular condyles, using digital caliper, as mentioned before. For volumetric measurements, water displacement technique will be used. The mandibular condyle will be immersed in a graduated beaker containing water till the level of the glued gutta percha. The volume of the displaced water will be measured and will represent the actual volume of the condyle