Evaluation of the stability of the palatal rugae using the three-dimensional superimposition technique following orthodontic treatment

Zhao, Jiamin; Du, Shaoyi; Liu, Yuying; Sultan, Badr; Hou, Yuxia; Guo, Yucheng

doi:10.1016/j.jdent.2022.104055

Cited by 11 publications

(4 citation statements)

References 58 publications

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“…As far as rugae are concerned, significant alterations were seen in the rugae location, particularly at their lateral ends, corresponding to the direction of tooth migration following the loss of neighboring teeth and the bone resorption around the maxillary arch [ 73 ]. However, variation mainly exists in the first rugae in cases of extraction, thereby making palatal rugae still distinct, nevertheless, and they can be an additional resource for individual identification [ 88 ]. When orthodontic treatment involves extraction, there is a possibility of changes in the length, width, and depth of the palate compared to orthodontics without extraction, which changes only the depth of the palate [ 89 ].…”

Section: Discussionmentioning

confidence: 99%

A Systematic Review of the Use of Intraoral Scanning for Human Identification Based on Palatal Morphology

Santhosh Kumar,

Chacko,

Kaur

et al. 2024

Diagnostics

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A common application for intraoral scanners is the digitization of the morphology of teeth and palatal rugae. Palatal scans are most commonly required to fabricate complete dentures and immediate transitional dentures and serve as a reference point for assessing orthodontic results. However, they are also frequently included by accident, even though the main purpose of intraoral scanning is to reconstruct dentition using computer-aided manufacturing (CAM). The literature shows that the identification of disaster victims has frequently involved palatal rugae impressions. As the skull provides sound insulation, the rugae are resistant to heat, chemicals, and stress. Antemortem data might be difficult to find during a forensic inquiry, particularly in disaster victim identification cases. In contrast with DNA and fingerprints, there is a greater likelihood of having a dental record that contains palatal scans. With specialized software, the scans can be exported as open stereolithography (STL) files. Considering that a full case consumes up to about 100 MB of hard drive space, long-term storage should not be an issue compared to a plaster model. Additionally, dentists widely use online databases to exchange data for smile design, implant registration, and orthodontic purposes. This will produce a digital database that grows quickly and is readily usable for forensic investigations. The uniqueness of forensic features is frequently challenged; however, palatal morphology’s unique trait could make it possible as it is characteristic of individuals as well as the most distinguishing factor. This review will highlight how rugae, palatal morphology, mirroring, superimposition, and geometrics can serve in forensic identification.

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Section: Discussionmentioning

confidence: 99%

A Systematic Review of the Use of Intraoral Scanning for Human Identification Based on Palatal Morphology

Santhosh Kumar,

Chacko,

Kaur

et al. 2024

Diagnostics

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“…An additional advantage of the DS derives from the ability to superimpose corresponding dental models during the process, allowing for useful comparisons of the original to the predicted model [ 8 ]. The analysis of differences in tooth position requires stable structures as superimposition references [ 9 ], such as the middle 2/3 of the third rugae in the maxillary cast, as well as various other superimposition principles to be taken into account during implementation and outcome interpretation [ 3 , 10 – 13 ].…”

Section: Introductionmentioning

confidence: 99%

Digital setup accuracy for moderate crowding correction with fixed orthodontic appliances: a prospective study

Kusaibati,

Sultan,

Hajeer

et al. 2024

Prog Orthod.

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Objectives To evaluate the accuracy of a semi-automatic 3D digital setup process in predicting the orthodontic treatment outcome achieved by labial fixed appliances. Subjects and Methods Twenty-five adult patients (18 to 24 years old) with class I malocclusion and moderate crowding were prospectively enrolled and received treatment on both jaws through the straight-wire technique. Prior to treatment commencement, a semi-automatic digital setup simulating the predicted treatment outcome was performed for each patient through Orthoanalyzer software (3Shape®, Copenhagen, Denmark) to obtain the prediction model. This was compared to the final outcome model through 3D superimposition methods. Metric variables and inspection of color-coded distance maps were used to detect how accurately the digital setup predicts the actual treatment outcome. Results The mean absolute distances (MAD) between the superimposed dental arches of the predicted and the final models were: 0.77 ± 0.13 mm following superimposition on the palate, 0.52 ± 0.06 mm following superimposition on the maxillary dental arch, and 0.55 ± 0.15 mm following superimposition on the mandibular dental arch. The MAD at the palatal reference area was 0.09 ± 0.04 mm. Visualization of color-coded distance maps indicated that the digital setup accurately predicted the final teeth position in a few cases. Almost half of the cases had posteriorly wider upper and lower dental arches and palatally/lingually positioned or inclined anterior teeth, whereas the rest still showed errors within 2–3 mm, distributed over the entire dental arches with no distinct pattern. Conclusions The accuracy of semi-automatic prediction of the labial fixed appliance treatment outcome in Class I cases with moderate crowding is not yet sufficient. While average measures showed deviations less than 1 mm, examination of individual color-coded distance maps revealed significant disparities between the simulated and the actual results.

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“…The efficiency of tooth movement in clear aligners has been evaluated by the American Board of Orthodontics objective grading system, peer assessment rating systems, cone-beam computed tomography, cephalometric evaluation and superimposition of pretreatment and posttreatment digital models with some superimposition techniques [17][18][19][20][21][22][23][24][25][26][27][28]. With the development of digital technology, digital models play an important role in evaluating therapy outcomes, particularly clear aligner treatment (CAT) under digital superimposition [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…With the development of digital technology, digital models play an important role in evaluating therapy outcomes, particularly clear aligner treatment (CAT) under digital superimposition [29][30][31]. The palatal rugae area has been reported to be a stable and reproducible structure for superimposition, and palatal rugae registration has been used to evaluate maxillary molar distalization with clear aligners [27,28].…”

Section: Introductionmentioning

confidence: 99%

Influence of maxillary molar distalization with clear aligners on three-dimensional direction: molar distal movement, intrusion, distal tip and crown buccal torque

Miao,

Zhang,

Yang

et al. 2023

Prog Orthod.

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Background The aim of this study was to evaluate the distal movement, vertical movement, distal tipping and crown buccal torque of maxillary molars after the completion of distalization by comparing the predicted movement with the achieved movement using palatal rugae registration. Methods The study included 22 clear aligner patients (7 males and 15 females), and 79 molars were measured. Two digital models were generated before treatment and after molar distalization and were superimposed after selecting the palatal rugae area for registration in GOM inspect suite software 2022 (GOM; Braunschweig, Germany). The predicted and achieved movements of molar distalization, intrusion, distal tip and crown buccal torque were measured and compared. Result The achieved distalization (1.25 ± 0.79 mm vs. 2.17 ± 1.03 mm, P < 0.001; 1.41 ± 1.00 mm vs. 2.66 ± 1.15 mm, P < 0.001), intrusion (0.47 ± 0.41 mm vs. 0.18 ± 0.54 mm, P < 0.01; 0.58 ± 0.65 mm vs. 0.10 ± 1.12 mm, P < 0.01), distal tip (5.30 ± 4.56° vs. 1.53 ± 2.55°, P < 0.001; 4.87 ± 4.50° vs. − 1.95 ± 4.32°, P < 0.001) and crown buccal torque (1.95 ± 4.18° vs. − 1.15 ± 4.75°, P < 0.001; 0.43 ± 4.39° vs. − 4.27 ± 6.42°, P < 0.001) were significantly different from the predicted values in the two groups (first molar, second molar). Significant regression relationships were found between the achieved distal movement and deviational intrusion (R2 = 0.203, P < 0.0001), distal tip (R2 = 0.133, P < 0.001) and crown buccal torque (R2 = 0.067, P < 0.05). There was a significant correlation between the deviational movements of intrusion and the distal tip (R = 0.555, P < 0.0001). Conclusion Approximately 2 mm maxillary molar distalization was achieved in this study. Deviational movement of intrusion, distal tip and crown buccal torque beyond the clear aligner virtual design appeared to a certain degree after distalization. Thus, more attention should be given to molar intrusion and distal tip and crown buccal torque as the designed distalization increases.

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Evaluation of the stability of the palatal rugae using the three-dimensional superimposition technique following orthodontic treatment

Cited by 11 publications

References 58 publications

A Systematic Review of the Use of Intraoral Scanning for Human Identification Based on Palatal Morphology

A Systematic Review of the Use of Intraoral Scanning for Human Identification Based on Palatal Morphology

Digital setup accuracy for moderate crowding correction with fixed orthodontic appliances: a prospective study

Influence of maxillary molar distalization with clear aligners on three-dimensional direction: molar distal movement, intrusion, distal tip and crown buccal torque

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