Evidence map›Paper›PMID 33487969›Full record

ArticleJournal of Indian Prosthodontic Society

A finite element analysis to study the stress distribution on distal implants in an all-on-four situation in atrophic maxilla as affected by the tilt of the implants and varying cantilever lengths.

Anju Kumari, Puja Malhotra, Shefali Phogat, Bhupender Yadav, Jaiveer Yadav, Sumit Singh Phukela

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Article in Journal of Indian Prosthodontic Society. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 9% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. Pooled it
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  13. Tilted implantation technique for edentulous patients.Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2021
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  14. Article
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

6 authors at 1 institution in 1 country.

Anju KumariDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Puja MalhotraDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Shefali PhogatDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Bhupender YadavDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Jaiveer YadavDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Sumit Singh PhukelaDepartment of Prosthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana, India.
Shree Guru Gobind Singh Tricentenary University · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimThe aim of this work was to evaluate stress distribution on implants in All-on-Four situation with varying distal implant angulations (30°,40°,45°) and varying cantilever lengths (4 mm, 8 mm, 12 mm, 16 mm) in atrophic maxilla using finite element analysis. SETTING AND

designA MATERIALS AND METHODOLOGY: Three-dimensional finite element model of an edentulous maxilla restored with a prosthesis supported by four implants was reconstructed to carry out the analysis. Three different configurations, corresponding to 3 tilt degrees of the distal implants (30°, 40°, and 45°) were subjected to 4 loading simulations. STATISTICAL ANALYSIS USED: The results of the simulations obtained were evaluated in terms of Von Mises equivalent stress levels at the bone-implant interface.

resultFrom a stress-level viewpoint, the 45° model was revealed to be the most critical for peri-implant bone. In all the loading simulations, the maximum stress values were always found at the neck of the distal implants. With increasing distal implant tilt, cantilever length reduces depending on the quality of bone. At 30° angulation of distal implant a maximum cantilever length of 16 mm may be given if the quality of bone is D3 but only 8 mm cantilever may be recommended if bone quality is D4. At 40° angulation, 16 mm in D3 bone and 0 mm in D4 bone whereas at 45° angulation, it reduces to 12 mm in D3 bone and no cantilever is recommended with D4 bone.

conclusionThe 45° tilt induced higher stress values at the bone-implant interface, especially in the distal aspect, than the other 2 tilts analyzed. Stress values increased with increased cantilever length which was further influenced by the distal implant tilt and the quality of the bone.

Indexed as

All-on-fouratrophic maxillacantileverfull-arch prosthesistilted implants

Identifiers

PMID33487969
PMCPMC7814689
OpenAlexW3092463824

What OpenQuestion holds

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LicenceCC BY-NC-SA
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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.