Evidence map›Paper›PMID 32650758›Full record

ArticleBMC oral health2020

Computer-aided design of polyetheretherketone for application to removable pediatric space maintainers.

Hui Guo, Yong Wang, Yijiao Zhao, He Liu

Registry-linked trialAbstract read
In one paragraph

Article in BMC oral health, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06825273 (Clinical Evaluation of 3-D Printed Partial Denture Space Maintainer and Its Impact on Children's Oral Health Status), which is not on this map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing 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.

NCT06825273 narecruitingnot on this mapstarted 2025, after this paper: background citation

Clinical Evaluation of 3-D Printed Partial Denture Space Maintainer and Its Impact on Children's Oral Health Status: A Randomized Controlled Clinical Crossover Study

TypeinterventionalSponsorTanta UniversityRan2025 to 2025Enrolled40ConditionsSpace Maintenance, Gingival HealthArmsspace maintainer
3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Article
  2. A Simplified Technique for the Fabrication of Esthetic and Functional Space Maintainers in Pediatric Dentistry.Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2026
    Article
  3. Review
  4. Article
  5. Article
  6. Review
  7. Chairside digital design and manufacturing method for children's band and loop space maintainers.Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2024
    Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Digitainers-Digital Space Maintainers: A Review.International journal of clinical pediatric dentistry · 2021
    Review
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

4 authors.

Hui GuoDepartment of Pediatric Dentistry, Peking University School of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing, 100081, China.
Yong WangNational Engineering Laboratory for Stomatology Digital Technology, 22 Zhongguancun Nandajie, Haidian District, Beijing, 100081, China.
Yijiao ZhaoNational Engineering Laboratory for Stomatology Digital Technology, 22 Zhongguancun Nandajie, Haidian District, Beijing, 100081, China. 1711110384@pku.edu.cn.
He LiuDepartment of Pediatric Dentistry, Peking University School of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing, 100081, China. pediatric14@163.com.ORCID 0000-0001-7732-4589

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe premature loss of primary teeth is a common problem in pediatric dentistry, resulting in disruption of the arch integrity. Hence, space maintainers (SM) used for maintaining spaces are necessary. However, current methods of making removable space maintainers (RSM) have some limitations.

methodsDigital models of dentition defects were obtained by using a scanning technique coupled with laser medical image reconstruction. The digital RSMs were designed using the 3Shape software. They were manufactured using two methods: polyetheretherketone (PEEK), and conventional methods (20 RSMs per group). For qualitative evaluation, the Likert five-point scale was used by 10 experts to obtain a score for 40 RSMs. The spaces between the tissue surfaces of the RSMs and the models were replaced using silicone, and the maximum and mean distances, as well as the standard deviation, were measured. A three-dimensional variation analysis was used to measure these spaces. The student's t-test and Satterthwaite t-test were used to compare the differences in the spaces for the various materials.

resultsThe PEEK RSMs were found to fit the models well. In the qualitative assessment, the mean experts' scores for the PEEK and conventional groups were 1.80 ± 0.40 and 1.82 ± 0.40, and there was no significant difference between the two groups (p = 0.875). In the quantitative assessment, the mean spaces for the PEEK digital RSMs and the conventional RSMs were 44.32 ± 1.75 μm, and 137.36 ± 18.63 μm, respectively, and the differences were statistically significant (p < 0.001). In addition, there were significant differences in the maximum space and the standard deviation between the two groups.

conclusionDigitally designed and integrated RSMs were found to be superior to those produced using the conventional method. 3D variation analysis results showed that the mean distances and standard deviations of the PEEK groups were significantly smaller than those of conventional group (p < 0.01). A PEEK-manufactured RSM produced using CAD/CAM would be extremely suitable for clinical applications.

Indexed as

Computer-Aided DesignDenture, Partial, RemovableKetonesPolyethylene GlycolsBenzophenonesChildDental Prosthesis DesignHumansPolymersBenzophenonesKetonespolyetheretherketonePolyethylene GlycolsPolymersComputer-aided designComputer-aided manufacturingPediatric dentistryPolyetheretherketoneRemovable space maintainer

Identifiers

PMID32650758
PMCPMC7353737

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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.