Restorative Space Analysis by Jaw Motion Tracking Using a Template in Completely Edentulous Patients

Han, Chol-Gwan; Park, Young-Bum; Shim, June‐Sung; Kim, Jong‐Eun

doi:10.3390/app11093933

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…Additionally, then it can be completing the alignment using the scanned data of the target, the movements of the targets are replaced with the movement of the patient's oral scan data (Figure 2). The procedure of oral scanning after attaching the targets, target tracking of the anterior teeth using an optical scanner, and replacement of the entire arch data were performed in this case by aligning with referenced target stickers and the same position in the cast [11].…”

Section: Confirmation Of Cr-mi Discrepancymentioning

confidence: 99%

“…If such a discrepancy is present, a horizontal trajectory (between two green dots) appears and its size can be measured by tracking software (Ezscan8; Medit Corporation, Seoul, Korea). Additionally, then it can be The procedure of oral scanning after attaching the targets, target tracking of the anterior teeth using an optical scanner, and replacement of the entire arch data were performed in this case by aligning with referenced target stickers and the same position in the cast [11].…”

Section: Confirmation Of Cr-mi Discrepancymentioning

confidence: 99%

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Alteration of the Occlusal Vertical Dimension for Prosthetic Restoration Using a Target Tracking System

et al. 2021

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Clinicians and researchers have used various methods to reproduce the maxillomandibular relationship and mandibular movement of individual patients using an articulator, with efforts being made to reduce errors associated with the conventional technique. When a change to a vertical dimension is required during the conventional prosthesis construction process, the maxillary and mandibular casts are mounted on the mechanical articulator using a facebow and bite registration and the elevation of the anterior guide pin of the articulator is used. However, this can inevitably cause errors due to differences between the articulator hinge movement and the actual trajectory of the patient. There has recently been increasing interest in tracking the trajectory of jaw motion of a patient, and this paper presents a new technique for altering the vertical dimension based on the measured trajectory. Target materials for performing tracking are attached to the maxillary and mandibular anterior teeth to record opening and closing movements of the patient’s mouth in real time and align the patient’s scanned intraoral data or cast data. The movements of the targets are replaced with the movement of the patient’s oral scan data. Additionally, then the occlusal vertical dimension is set to a new position based on the obtained trajectory. After determining the optimal vertical dimension with consideration of the space required for restoration, maxillary and mandibular STL files are exported and the designed cast is created using a 3D printer. The printed cast is mounted on an articulator for subsequent procedures. This approach maintains the patient’s actual maxillomandibular relationship at various vertical heights and can also reduce the chair time required when adjusting for errors.

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Section: Confirmation Of Cr-mi Discrepancymentioning

confidence: 99%

Section: Confirmation Of Cr-mi Discrepancymentioning

confidence: 99%

Alteration of the Occlusal Vertical Dimension for Prosthetic Restoration Using a Target Tracking System

et al. 2021

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“…Lee et al 14 proposed a target‐tracking method for increasing the vertical dimension of occlusion based on the measured jaw movement trajectory of a patient with extremely worn dentition, but without considering the horizontal relationship. Han et al 15 analyzed the restoration space of an edentulous patient using a jaw movement tracking technique, in which the target material was attached to the existing old maxillary denture; however, the accuracy of the tracking method was not evaluated. For edentulous patients without old dentures, the direct digital method for determining and recording the maxillomandibular relationship remains a persistent problem.…”

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confidence: 99%

Digital Determination and Recording of Edentulous Maxillomandibular Relationship Using a Jaw Movement Tracking System

Chen

Wang

et al. 2022

Journal of Prosthodontics

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To establish a direct digital method for determining and recording edentulous maxillomandibular relationship using a custom-made jaw movement tracking system and evaluate its accuracy. Materials and methods: A novel jaw tracking system was used to record the trajectory of habitual opening-closing jaw movement, and mandibular rest position (MRP) in 10 edentulous patients. 3D surface scanning was performed on the conventional maxillomandibular impressions and facial structures of patients in MRP. The multisource data were registered using a custom-made recording tool. A plane parallel to the ala-tragus and horizontal lines was constructed 2 mm above the MRP, and its vertical position was used to determine the vertical relationship. The intersections of the trajectory passing through the plane were located, and their density distributions were analyzed. The coordinates of highest density, which presented the highest repeatability of jaw movement, were used to construct the digital maxillomandibular relationship (test group). The maxillomandibular relationship of the new complete dentures with artificial teeth in the intercuspal position was defined as the control group. The displacements of the anterior reference point and 3D deviations of the entire mandibular arch were measured and compared between the test and control groups using a Wilcoxon signed-ranks test and a one-sample t-test, respectively. Results: With reference to the centric relationship position, the maximum displacements of the anterior reference points were in the horizontal anteroposterior direction for both groups, and there were no significant differences. Compared to the control group, the 3D deviations of the entire mandibular arch in the test group were significant (95% confidence interval: 0.76 mm to 1.35 mm, p < 0.001). Conclusions: By analyzing the individual trajectory features obtained by the in-house developed jaw tracking system, a digital method for determining and recording edentulous maxillomandibular relationships was established; however, the accuracy needs to be further improved.

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Restorative Space Analysis by Jaw Motion Tracking Using a Template in Completely Edentulous Patients

Cited by 2 publications

References 15 publications

Alteration of the Occlusal Vertical Dimension for Prosthetic Restoration Using a Target Tracking System

Alteration of the Occlusal Vertical Dimension for Prosthetic Restoration Using a Target Tracking System

Digital Determination and Recording of Edentulous Maxillomandibular Relationship Using a Jaw Movement Tracking System

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