Evidence map›Paper›PMID 40739548›Full record

ArticleBMC oral health2025

Accuracy and reliability of a three-dimensional superimposition method for maxillary jaws and dentition.

Qifei Yang, Minchun Cai, Shushu Hao, Huihan Chu, Yuting Wang, Ming Hu, Hui Yang, Zhendong Wang

Abstract read
In one paragraph

Article in BMC oral health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Qifei Yang *The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Minchun Cai *The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Shushu HaoThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Huihan ChuThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Yuting WangThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Ming HuThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Hui YangThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China.
Zhendong WangThe Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, 210029, China. wangzhd74@njmu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThis study aims to develop a method for three-dimensional (3D) superimposition of the maxillary jaws and dentition using Cone Beam Computed Tomography (CBCT) and intraoral scan data, and to evaluate its accuracy and reliability. MATERIALS AND

methodsThis study included 32 adult patients with Angle Class II malocclusion who underwent clear aligner therapy (CAT). The patients were categorized into two groups: Group 1 (TMEM: Third Molar Extraction Management group), including 16 individuals who had undergone maxillary third molar extraction prior to treatment. Group 2 (RMEM: Retained Maxillary Third Molar group), consisting of 16 patients who retained their maxillary third molars throughout the treatment period. CBCT scans and intraoral scan data were obtained at pre-treatment and post-treatment stages. Voxel-based superimposition and surface-based alignment techniques were applied to register the CBCT images before and after treatment. Subsequently, the digitized maxillary dentition model from intraoral scans was integrated with the CBCT dataset. Image alignment was performed, and its accuracy was verified. The precision and reliability of both alignment methods were systematically evaluated.

resultsThe measurement results revealed that the average alignment accuracy of the CBCT images before and after treatment was 0.52 ± 0.03 mm (0.52 ± 0.03 mm in the TMEM group and 0.53 ± 0.03 mm in the RMEM group, the difference between the two groups was not significant, p = 0.782, p > 0.05), while the average alignment accuracy of the intraoral scan model integrated onto the CBCT images was 0.20 ± 0.02 mm (0.20 ± 0.01 mm in the TMEM group and 0.20 ± 0.01 mm in the RMEM group, the difference between the two groups was not significant, p = 0.551, p > 0.05). All registration methods demonstrated excellent inter-examiner reproducibility within each group (ICC > 0.9).

conclusionThis study identified a reproducible and reliable method for 3D superimpose of the maxillary jaw and dentition before and after orthodontic treatment. This method can be used to assess changes in the position of the maxillary dentition and jaw morphology following orthodontic treatment.

Indexed as

Cone-Beam Computed TomographyDentitionImaging, Three-DimensionalMalocclusion, Angle Class IIMaxillaAdultFemaleHumansImage Processing, Computer-AssistedMaleMolar, ThirdReproducibility of ResultsTooth ExtractionYoung AdultAccuracyCBCT imagesIntraoral scan modelReliabilitySuperimposition

Identifiers

PMID40739548
PMCPMC12312438

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.