A novel logarithmic spiral design for proximal interphalangeal joint arthroplasty.

Hitoshi Hirata, Shigeru Kurimoto, Hidemasa Yoneda, Yasuharu Koike, Renita Sirisena, Shingo Shimoda

Abstract read

In one paragraph

Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

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0citing 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

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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

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

6 authors.

Hitoshi HirataDepartment of Personalized Medical Technology, Nagoya University School of Medicine, Nagoya, Japan. h-hirata@med.nagoya-u.ac.jp.

Shigeru KurimotoDepartment of Orthopaedics, Toyota Memorial Hospital, Toyota, Japan.

Hidemasa YonedaDepartment of Human Enhancement and Hand Surgery, Nagoya University School of Medicine, Nagoya, Japan.

Yasuharu KoikeInstitute of Integrated Research, Institute of Science Tokyo, Yokohama, Japan.

Renita SirisenaDepartment of Human Enhancement and Hand Surgery, Nagoya University School of Medicine, Nagoya, Japan.

Shingo ShimodaDepartment of Personalized Medical Technology, Nagoya University School of Medicine, Nagoya, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study evaluated a novel implant for proximal interphalangeal (PIP) joint arthroplasty that we designed according to the principles of a logarithmic spiral. The design addresses the limitations of current implants that poorly replicate natural finger kinematics. Finite element analysis and cadaver studies, including biomechanical and kinematic analyses, were conducted. Results showed that our implant had consistent sliding displacement, maintained consistent articular surface spacing, and was able to achieve a flexion arc greater than 90°, all while maintaining consistent contact throughout joint motion. In both simulation and cadaveric models, our implant demonstrates improved biomechanics by better replicating anatomical finger joint motion through its logarithmic spiral design that can potentially improve clinical outcomes for patients undergoing PIP joint arthroplasty.

Indexed as

Arthroplasty, Replacement, FingerFinger JointJoint ProsthesisProsthesis DesignBiomechanical PhenomenaCadaverFinite Element AnalysisHumansRange of Motion, ArticularArthroplastyBiomechanicsFinite element analysisLogarithmic spiralProsthesis designProximal interphalangeal joint

Identifiers

PMID41922432

DOI10.1038/s41598-026-45687-8

PMCPMC13106650

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LicenceCC BY-NC-ND

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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.