ArticleArchives of orthopaedic and trauma surgery2025
Primary stability of short stem prostheses for the shoulder-a biomechanical comparative study of two short stem designs.
Article in Archives of orthopaedic and trauma surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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.
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.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionThe use of short stems has been a trend in shoulder arthroplasty within the last 15 years with excellent short- to mid-term clinical outcomes. Short stems anchor in the cancellous metaphysis and a high level of postoperative stability with absence of micro-movements at the bone-implant interface can be crucial for the following healing. The study aimed to assess the primary rotational stability of two uncemented short stems. The hypothesis was that the rotational stability is independent of implant design. MATERIALS AND
methodsA biomechanical in-vitro study was conducted on 12 fresh-frozen (six matched pairs) human cadaveric shoulders. Two short stems, one with a cylindrical and one with a rectangular stem shape design, were implanted in a cement-free technique. A sinusoidal torque force was applied, starting from 0.5 Nm (load level one) to 3.0 Nm (load level six) with increasing load levels (0.5 Nm per 500 cycles). The relative rotation between stem and bone was assessed with an optical measurement system.
resultsMean donor age was 80 years (range 67-89 years), mean bone density was 0.41 g/cm
conclusionsThe cylindrical stem design shows a higher relative rotation in vitro imitating the immediate postoperative situation, indicating that rotational stability might depend on the implant design. However, the mid- to first long-term rates of aseptic stem loosening for the cylindrical stem design are generally low. It is important to consider the sensible postoperative healing phase during postoperative rehabilitation, especially for cylindrical stem designs, to promote secondary osseointegration. LEVEL OF EVIDENCE: Experimental study.
Indexed as
Identifiers
What OpenQuestion holds
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.