PMC4979326_01
Main components of the SICAT jaw motion tracking+ system
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T-attachment, a SICAT JMT+ basic unit, and SICAT JMT+ application software [Figure 1]. The facebow has a nose pad to help locate the facebow, an upper headband, and a rear headband to secure the position.
Preparation of SICAT Fusion Bite and paraocclusal T-attachment
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TMD problems, the CBCT was taken with the SICAT Fusion Bite in the mouth during the CBCT scan for tracing her mandibular movement later. To transfer the coordinate system of the jaw tracking device, a SICAT fusion bite [Figure 2] was prepared with the SICAT Fusion Bite tray as follows: (1) silicone impression material was put in both the maxillary and mandibular side of the Fusion Bite reference tray, (2) the patient was asked to bite on the impression material, (3) the bite was taken out of the patient's mouth after the impression was done and was trimmed to remove excess materials. The patient was asked to wear the SICAT Fusion Bite in the mouth during CBCT scan. ESPE; Seefeld, Germany) to the bending part of the T-attachment, and adapted to the tooth surfaces or to the study model, and it was left to harden [Figure 2]. Excess material and sharp edges were removed and it was made sure that the upper teeth and the SICAT Fusion Bite are not in touch with the paraocclusal T-attachment to guarantee an undisturbed functional movement of the jaw in the occlusion.
Device on the patient's head. (a) The SICAT Fusion Bite in mouth. (b) The paraocclusal T-attachment attached to the lower arch in mouth. (c) The facebow was stably positioned on patient's head. The lower jaw sensor was attached to the SICAT Fusion Bite. Later, the lower jaw sensor would be attached to the paraocclusal T-attachment
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The occlusion was checked by examining if the teeth were in the right position of the impression and stability was checked by moving the Fusion Bite [Figure 3a]. Braun Melsungen; Melsungen, Germany) [Figure 3b]. First, the SICAT JMT lower jaw sensor was attached to the SICAT FusionBite [Figure 3c]. "Record" was clicked and the software guided the program throughout the calibration sequence.
Merge of cone beam computed tomography and jaw moving tracking data and segmentation of the mandible. (a) Scroll through the axial slices until at least one spherical radiopaque markers is shown, mark the marker, and repeat until three spherical markers are marked. (b) All of the eight radiopaque markers were automatically found after three radiopaque markers on the Fusion Bite tray were identified, and the tray was located. (c) Segmentation of the mandible
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Axial slices were scrolled through until at least one spherical radiopaque marker was shown, marker was marked, and it was repeated until three spherical markers were marked [Figure 4a]. All eight radiopaque markers were automatically found after three radiopaque markers on the Fusion Bite tray were identified, and the tray was located [Figure 4b]. When the approximate position of the mandible was indicated by drawing marks on the radiographic sectional slices, the software calculated the data, and presented a 3D image of the cropped mandibular segment on the screen [Figure 4c].
The procedures for dynamic real-time jaw tracking and cone beam computed tomography simulation
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The procedures for dynamic real-time jaw tracking and CBCT simulation are summarized in Figure 5.