Evaluation of the Quantitative Accuracy of 3D Reconstruction of Edentulous Jaw Models with Jaw Relation Based on Reference Point System Alignment

Li, Weiwei; Yuan, Fusong; Lv, Peijun; Wang, Yong; Sun, Yuchun

doi:10.1371/journal.pone.0117320

Cited by 6 publications

(8 citation statements)

References 12 publications

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“…To solve this problem, many new technologies have been developed, such as reconstructing virtual models of dental casts using mechanical probes[ 4 , 5 ]and optical lasers[ 6 , 7 , 8 , 9 ]instead of taking manual measurements. For example, 3D digital models of scanned dental plaster casts were reconstructed and measured using a line laser scanner.…”

Section: Introductionmentioning

confidence: 99%

The application of multi-baseline digital close-range photogrammetry in three-dimensional imaging and measurement of dental casts

Fu¹,

Liu

et al. 2017

PLoS ONE

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ObjectiveTo explore a new technique for reconstructing and measuring three-dimensional (3D) models of orthodontic plaster casts using multi-baseline digital close-range photogrammetry (MBDCRP) with a single-lens reflex camera.Study designThirty sets of orthodontic plaster casts that do not exhibit severe horizontal overlap (>2 mm) between any two teeth were recorded by a single-lens reflex camera with 72 pictures taken in different directions. The 3D models of these casts were reconstructed and measured using the open source software MeshLab. These parameters, including mesio-distal crown diameter, arch width, and arch perimeter, were recorded six times on both the 3D digital models and on plaster casts by two examiners. Statistical analysis was carried out using the Bland–Altman method to measure agreement between the novel method and the traditional calliper method by calculating the differences between mean values.ResultsThe average differences between the measurements of the photogrammetric 3D models and the plaster casts were 0.011–0.402mm. The mean differences between measurements obtained by the photogrammetric 3D models and the dental casts were not significant except for the lower arch perimeter (P>0.05), and all the differences were regarded as clinically acceptable (<0.5 mm).ConclusionsMeasurements obtained by MBDCRP are compared well with those obtained from plaster casts, indicating that MBDCRP is an alternate way to store and measure dental plaster casts without severe horizontal overlap between any two teeth.

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Section: Introductionmentioning

confidence: 99%

The application of multi-baseline digital close-range photogrammetry in three-dimensional imaging and measurement of dental casts

Fu¹,

Liu

et al. 2017

PLoS ONE

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“…When registering with the RPS method, selecting reference point pairs and weight settings may affect the final registration results. Li et al [ 21 ] added registration markers to an edentulous jaw model to complete 3D construction when only the maxillary and mandibular jaw models were scanned. Their proposed method eliminated the subjective error incurred during the selection of feature points and prevented the displacement and rotation of the paired model at the central relation.…”

Section: Discussionmentioning

confidence: 99%

Optimum design of reference points distribution in three-dimensional reconstruction of dental model in intercuspal position

Zhang

et al. 2021

BMC Oral Health

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Purpose The scanning of plaster models for three-dimensional (3D) construction requires their rigid fixation in the intercuspal position. Factors such as installation, motion, and scanning procedures influenced the accuracy of this method, which ultimately influence the results. Therefore, the present study attempted to provide an optimal and accurate method with less complex procedures and a more accessible equipment for determining the intercuspal relation in the 3D occlusal construction of dental models. Methods A pair of plastic mounting plates that could be directly attached to a mechanical articulator was designed and 3D printed. Nine axial hemispherical concaves were introduced on the axial surface of each plate. The rigidly fixed maxillary and mandibular dental models were scanned directly. The distances DR between nine pairs of concaves on both mounting plates adhered to the maxillary and mandibular sections of the articulator were measured using the three-coordinate measuring machine Faro Edge as the reference. The present study comprised seven test groups varying in number and location. Assessing the reference points from each of the seven groups performed the 3D construction. The Geomagic Studio software was used to construct the concaves of digital casts, and the distances DM between the pairs of concaves were measured as test values. Variable differences between DR and DM were analyzed. Results An optimum distribution scheme was obtained for reference point registration by quantitatively evaluating accuracy levels of the 3D constructions of different reference point distribution patterns. This scheme can serve as a reference for related studies and dental clinic operations. Conclusions Three-dimensional construction of the intercuspal relation during scanning of the maxillary and mandibular models with an accuracy of 0.046 mm ± 0.009 mm can be achieved using the improved design of mounting plates.

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“…These events are mainly associated with the depth control of the guide and are rare if there are no errors in the depth design and the guide is properly installed. 18 – 20 …”

Section: Discussionmentioning

confidence: 99%

Accuracy of half-way mucosa-supported implant guides for edentulous jaws: a retrospective study with a median follow-up of 2 years

et al. 2021

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Objective To assess the accuracy of half-way digital mucosa-supported implant guides (HDMIGs) for edentulous jaws. Methods Ninety-five consecutive patients (859 implants) with edentulous jaws who underwent implant placement using an HDMIG from July 2012 to June 2018 were retrospectively identified. The primary endpoint was implant-related complications (nerve injury and unexpected perforation), and the secondary endpoints were the faciolingual distance, mesiodistal distance, buccolingual angle, and mesiodistal angle. Follow-ups occurred at 1 month, 2 months, and then every 2 months following implant placement. Results Twenty-seven (28.4%) patients met the exclusion criteria, leaving 68 eligible patients (636 implants) for the final analysis. The median follow-up was 24 months (range, 18–27 months). No patients developed nerve injury, revision, or unexpected perforation. At the final follow-up, the mean faciolingual distance was 0.65 ± 0.16 mm, the mean mesiodistal distance was 1.16 ± 0.61 mm, the mean buccolingual angle was 4.04° ± 2.26°, and the mean mesiodistal angle was 3.75° ± 2.56°. In the comparison of the first month after surgery and the last follow-up, no significant differences were detected in any of the four measured variables. Conclusion Use of an HDMIG may be a convenient and safe method to ensure correct implantation.

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Evaluation of the Quantitative Accuracy of 3D Reconstruction of Edentulous Jaw Models with Jaw Relation Based on Reference Point System Alignment

Cited by 6 publications

References 12 publications

The application of multi-baseline digital close-range photogrammetry in three-dimensional imaging and measurement of dental casts

The application of multi-baseline digital close-range photogrammetry in three-dimensional imaging and measurement of dental casts

Optimum design of reference points distribution in three-dimensional reconstruction of dental model in intercuspal position

Accuracy of half-way mucosa-supported implant guides for edentulous jaws: a retrospective study with a median follow-up of 2 years

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