Evidence map›Paper›PMID 34255171›Full record

ArticleArchives of orthopaedic and trauma surgery2021

Handheld computer-navigated constrained total knee arthroplasty for complex extra-articular deformities.

M Pietsch, M Hochegger, O Djahani, G Mlaker, M Eder-Halbedl, Th Hofstädter

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Article in Archives of orthopaedic and trauma surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 2 pooled it
1.0field-weighted citation impact, top 24% 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

6 citing papers in PubMed, 2 syntheses or guidelines pooled it, 7 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

6 authors at 1 institution in 1 country.

M PietschDepartment of Orthopaedic Surgery, Orthopaedic Hospital Stolzalpe (LKH Murtal), Stolzalpe 38, 8852, Stolzalpe, Austria. martin.pietsch@lkh-stolzalpe.at.
M HocheggerDepartment of Orthopaedic Surgery, Orthopaedic Hospital Stolzalpe (LKH Murtal), Stolzalpe 38, 8852, Stolzalpe, Austria.
O DjahaniDepartment of Orthopaedic Surgery, Orthopaedic Hospital Stolzalpe (LKH Murtal), Stolzalpe 38, 8852, Stolzalpe, Austria.
G MlakerDepartment of Orthopaedic Surgery, Orthopaedic Hospital Stolzalpe (LKH Murtal), Stolzalpe 38, 8852, Stolzalpe, Austria.
M Eder-HalbedlDepartment of Orthopaedic Surgery, Orthopaedic Hospital Stolzalpe (LKH Murtal), Stolzalpe 38, 8852, Stolzalpe, Austria.
Th HofstädterDepartment of Orthopaedic and Trauma Surgery, Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020, Salzburg, Austria.
Paracelsus Medical University · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe present study aimed to assess the postoperative alignment and clinical outcomes of patients with complex extra-articular deformities (EADs) undergoing computer-assisted surgery (CAS) for constrained total knee arthroplasty (TKA) with modular stem extensions. MATERIALS AND

methodsFrom May 2015 to July 2018, ten patients with EADs scheduled for constrained TKA were enrolled retrospectively. The preoperative average deviation from neutral (= 180°) mechanical axis was 15.3° (range of coronal alignment: 150.9° varus-202.9° valgus). Alignment was assessed using an accelerometer-based handheld CAS system. On long-leg films, the positions of the components and possible stems were analysed and templated preoperatively. The average follow-up was 3.3 years (range: 2.0-4.6 years).

resultsThe postoperative mechanical axis was within ± 3.0° from neutral in nine patients. In all patients, the Knee Society score (KSS) and range of motion improved significantly. A constrained condylar and a rotating hinge prosthesis were used in five patients each. In eight patients, the 100-mm cementless stem that was preferred by the authors was found to be unusable for the femur or the tibia in the planning stage. For the femur, a cementless 100-mm stem was used in three, and a cemented 30-mm stem in five patients; a femoral stem was not usable in two patients. For the tibia, a cementless 100-mm stem was used in six, and a cemented 30-mm stem in two patients; a monoblock rotating hinge tibia was used in two patients.

conclusionsComplex EADs were excellently managed during constrained TKA implantation using the handheld CAS system. Templating allowed the possible stem lengths to be identified and prevented anatomical conflict with the CAS-configured mechanical alignment. Limb alignment and function improved significantly after surgery. No intra- or postoperative complications occurred. LEVEL OF EVIDENCE: Level IV, retrospective study.

Indexed as

Arthroplasty, Replacement, KneeOsteoarthritis, KneeComputers, HandheldHumansRadiographyRetrospective StudiesAlignmentComputer-assisted surgeryComputer navigationConstrained total knee arthroplastyExtra-articular deformityTotal knee arthroplasty

Identifiers

PMID34255171
OpenAlexW3180324275

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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.