Evidence map›Paper›PMID 32613434›Full record

ArticleClinical oral investigations2021

Accuracy of fully guided orthodontic mini-implant placement evaluated by cone-beam computed tomography: a study involving human cadaver heads.

Kristian Kniha, Maximilian Brandt, Anna Bock, Ali Modabber, Andreas Prescher, Frank Hölzle, Golamreza Danesh, Stephan Christian Möhlhenrich

Open access · hybridAbstract read
In one paragraph

Article in Clinical oral investigations, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 5% of its field
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

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.

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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 at 3 institutions in 1 country.

Kristian KnihaDepartment of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.
Maximilian BrandtPrivate practice for Orthodontics, Blumenstraße 29, 73728, Esslingen, Germany.
Anna BockDepartment of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.
Ali ModabberPrivate practice for Orthodontics, Blumenstraße 29, 73728, Esslingen, Germany.
Andreas PrescherMedical Faculty of RWTH-Aachen, Institute of Molecular and Cellular Anatomy, Pauwelsstraße 30, 52074, Aachen, Germany.
Frank HölzleDepartment of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.
Golamreza DaneshDepartment of Orthodontics, University of Witten/Herdecke, Alfred-Herrhausen Str. 44, 58455, Witten, Germany.
Stephan Christian MöhlhenrichDepartment of Orthodontics, University of Witten/Herdecke, Alfred-Herrhausen Str. 44, 58455, Witten, Germany. stephan.moehlhenrich@uni-wh.de.ORCID http://orcid.org/0000-0002-7023-991X
Universitätsklinikum Aachen · DEWitten/Herdecke University · DERWTH Aachen University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe aim of this study was to evaluate the accuracy of fully guided orthodontic mini-implant (OMI) placements supported by tooth- (TBGs) or gingiva-borne silicone guides (GBGs) based on virtually superimposed lateral cephalograms on virtual plaster models. MATERIALS AND

methodsLateral cephalograms and corresponding plaster models were virtually superimposed for the planning of OMI positions; fully guided TBGs and GBGs were fabricated (each, n = 10). A total of 40 OMIs were inserted in a paramedian position into the palate of 20 human cadavers. Postoperative cone-beam computer tomographies (CBCTs) were carried out, and an accuracy evaluation was performed by comparing preoperative planning models and postoperative CBCTs. Deviations of the axis, tip, centre of the shoulder and vertical position of each of the implants were evaluated. Furthermore, the transfer accuracy measured by postoperative CBCT scans were compared with the accuracy determined using an intraoral scanner.

resultsA significant deviation between TBGs (2.81° SD 2.69) and GBGs (6.22° SD 4.26) regarding implant angulation was evaluated (p = 0.005). Implant tip and implant shoulder deviations revealed no statistical differences between the guides. Accuracy values of oral scans regarding vertical deviations were significantly more inaccurate when compared with CBCTs (p < 0.001).

conclusionsThe accuracy of an OMI position can be significantly increased by using a guide extension over the teeth. Vertical implant positions presented the lowest deviations. Postoperative oral scans and CBCTs represent diverging accuracy measurements when compared with virtual planning. CLINICAL RELEVANCE: Users must keep in mind that despite virtual planning deviations, inaccuracies of a few millimetres may occur.

Indexed as

Dental ImplantsOrthodontic Anchorage ProceduresSurgery, Computer-AssistedCadaverComputer-Aided DesignCone-Beam Computed TomographyDental Implantation, EndosseousHumansImaging, Three-DimensionalPatient Care PlanningDental ImplantsAccuracyDental implantGuided surgeryTemplate

Identifiers

PMID32613434
PMCPMC7878209
OpenAlexW3038140281

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Registered trials

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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.