Evidence map›Paper›PMID 34143261›Full record

ArticleArchives of orthopaedic and trauma surgery2022

The distal femur trochlear groove appears to compensate for tibial deformity but not femoral deformity in an investigation of five-hundred and seventy-nine cadaveric skeletons.

Joanne H Wang, Douglas S Weinberg, Kouami Amakoutou, Daniel R Cooperman, Raymond W Liu

Abstract read
PubMed Publisher
In one paragraph

Article in Archives of orthopaedic and trauma surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
0.3field-weighted citation impact, top 47% 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

5 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. 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

5 authors at 2 institutions in 1 country.

Joanne H WangDepartment of Orthopedic Surgery, Resident Physician, University Hospitals/Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
Douglas S WeinbergDepartment of Orthopedic Surgery, Resident Physician, University Hospitals/Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
Kouami AmakoutouResearch Fellow in Pediatric Orthopaedic Surgery, University Hospitals/Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
Daniel R CoopermanDepartment of Orthopedic Surgery, Professor of Pediatric Orthopedics, Yale-New Haven Children's Hospital, 1 Park Street, New Haven, CT, 06504, USA.
Raymond W LiuDepartment of Orthopedic Surgery, Victor M. Goldberg Professor in Orthopedic Surgery, University Hospitals/Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. Raymond.Liu@UHhospitals.org.
University Hospitals of Cleveland · USYale New Haven Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe etiology of patellofemoral disorders is multifactorial. Preoperative patellofemoral anatomy evaluation is of great importance in patients undergoing surgery for patellofemoral disorders. Although anatomical risk factors of patellofemoral disorders have been thoroughly investigated in clinical and radiological studies, there are sparse data regarding the association between trochlear dysplasia with other anatomical parameters. This study sought to explore those associations using a large osteological collection.

methodsFive-hundred and seventy-nine cadaveric skeletons were obtained from the Hamann-Todd osteological collection. Mechanical lateral distal femoral angle (mLDFA), medial proximal tibial angle (MPTA), femoral version, tibial torsion, lateral position of the tibial tubercle, and femoral length were modeled as predictors of medial and lateral flange height of the distal femur trochlea at various degrees of knee flexion.

resultsThe average age and standard deviation for the 1158 lower extremities analyzed was 55.9 ± 10.2 years. There were 500 males (86%) and 79 females. Increasing MPTA or tibial valgus predicted increasing lateral femoral flange height at 0, 30, and 50 degrees of knee flexion [(standardized beta 0.111, p = 0.01), (standardized beta 0.129, p < 0.001), and (standardized beta 0.186, p < 0.001), respectively]. Increasing internal tibial torsion predicted increased medial flange height at 30 and 50° [(standardized beta - 0.114, p = 0.006), (standardized beta - 0.108, p = 0.006), respectively]. Increased femoral retroversion predicted increasing lateral flange height at 0 and 30 degrees [(standardized beta - 0.105, p = 0.005), (standardized beta - 0.098, p = 0.004), respectively].

conclusionsTo maintain the equilibrium necessary for effective patellar tracking, the depth of trochlear groove appears to effectively compensate for some of the anatomical parameters of the proximal tibia associated with patellofemoral disorders, and appears to be less influenced by femoral alignment. The clinical relevance of these findings warrants further investigation, and emphasizes the importance of carefully assessing the lower limb alignment in the management of patellofemoral disorders.

Indexed as

FemurPatellofemoral JointCadaverFemaleHumansLower ExtremityMaleSkeletonTibiaFemoral versionMechanical lateral distal femoral angleMedial proximal tibial anglePatellofemoral disordersTrochlear dysplasiaTrochlear groove

Identifiers

PMID34143261
OpenAlexW3168344444

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.