Evidence map›Paper›PMID 42621197›Full record

ArticleArthroplasty today2026

Peg Shearing as a Method of Failure in Highly Cross-Linked Polyethylene Patellar Components Used in Patellofemoral Arthroplasty.

Morgan Pierce, Justin Leal, Fredrick Baker Mills, Jason Shah, Michael P Bolognesi, William A Jiranek

Abstract readCase Reports
PubMed Full text at PMC Publisher
In one paragraph

Article in Arthroplasty today, 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
0cells of the map it votes in
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

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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.

Morgan PierceUniversity of North Dakota School of Medicine & Health Sciences, Grand Forks, ND, USA.
Justin LealDepartment of Orthopaedic Surgery, Duke University, Durham, NC, USA.
Fredrick Baker MillsDepartment of Orthopaedic Surgery, Duke University, Durham, NC, USA.
Jason ShahDepartment of Orthopaedic Surgery, Duke University, Durham, NC, USA.
Michael P BolognesiDepartment of Orthopaedic Surgery, Duke University, Durham, NC, USA.
William A JiranekDepartment of Orthopaedic Surgery, Duke University, Durham, NC, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Highly cross-linked polyethylene (HXLPE) is commonly used in knee arthroplasty due to its improved wear resistance. However, increased crosslinking reduces the tensile strength and fatigue resistance of polyethylene, which may be detrimental in high shear environments such as a cemented patellar button. In patellofemoral arthroplasty (PFA), patellar components are exposed to substantial shear stresses, which may predispose polyethylene components to fatigue-related failure and peg shear. We report a case series of patellar component failures in PFA, including several HXLPE patellar buttons demonstrating peg fracture and loosening, as well as 1 ultra-high molecular weight polyethylene patellar button with a similar failure pattern. To our knowledge, these represent the first reported cases of HXLPE patellar component peg shear in PFA, a complication previously described only in the setting of total knee arthroplasty.

Indexed as

Highly cross-linked polyethyleneImplant failurePatellaPatellofemoral arthroplastyShear

Identifiers

PMID42621197
PMCPMC13487006

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.