Evidence map›Paper›PMID 29574546›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2018

Graft bending angle affects allograft tendon maturity early after anterior cruciate ligament reconstruction.

Linhai Chen, Yibing Wu, Guanghao Lin, Peng Wei, Zaohui Ye, Yangjian Wang, Tiantian Ren

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In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 4% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Pooled it
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  4. Radiographic Measurement of Graft Bending Angle in Failed Anterior Cruciate Ligament Reconstructions: A Matched Control Analysis.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2026
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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

7 authors at 2 institutions in 1 country.

Linhai ChenMedical college, Ningbo University, Ningbo, Zhejiang, People's Republic of China.
Yibing WuMedical college, Ningbo University, Ningbo, Zhejiang, People's Republic of China.
Guanghao LinMedical college, Ningbo University, Ningbo, Zhejiang, People's Republic of China.
Peng WeiDepartment of Repair and Reconstruction Surgery, Ningbo First hospital, 247 Renmin Road, Ningbo, Zhejiang, People's Republic of China. pengweidoctor@126.com.
Zaohui YeDepartment of Repair and Reconstruction Surgery, Ningbo First hospital, 247 Renmin Road, Ningbo, Zhejiang, People's Republic of China.
Yangjian WangDepartment of Repair and Reconstruction Surgery, Ningbo First hospital, 247 Renmin Road, Ningbo, Zhejiang, People's Republic of China.
Tiantian RenDepartment of Repair and Reconstruction Surgery, Ningbo First hospital, 247 Renmin Road, Ningbo, Zhejiang, People's Republic of China.
Ningbo First Hospital · CNNingbo University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of this study was to clarify the association of the anterior cruciate ligament (ACL) graft bending angle and graft maturity of autograft and allograft tendons using high-resolution MRI.

methodsPatients with unilateral ACL reconstruction were invited to participate in this study, and they were examined using a 3.0-T MRI scan at 3, 6 and 12 months after the operation. Anatomic single-bundle ACL reconstruction was performed on 48 patients using the trans-portal technique, including 28 with autograft hamstring tendons and 20 with allograft tendons. To evaluate graft healing, the signal/noise quotient (SNQ) was measured in four regions of interest (ROIs) of the femoral tunnel, proximal, midsubstance and distal ACL grafts. The graft bending angle was defined as the angle between the femoral bone tunnel and the line connecting the femoral and tibial tunnel apertures. Graft SNQ and graft bending angle were assessed at 3, 6 and 12 months postoperatively, and the association between SNQ and the average graft bending angle was analyzed.

resultsGenerally, the mean graft bending angle of this cohort increased gradually with time. The SNQ value of each graft region increased from 3 to 6 months and then decreased from 6 to 12 months. In the whole cohort, the graft bending angle had a significant positive association with graft SNQ in the femoral tunnel or proximal site. In the allograft subgroup, the graft bending angle had a significant positive association with the graft SNQ in the femoral tunnel or proximal site at 6 months after surgery, while there was no association between the graft bending angle and SNQ at 12 months. In the autograft subgroup, the graft bending angle had a significant positive association with graft SNQ in the femoral tunnel or proximal site at 12 months after surgery.

conclusionGenerally, the graft bending angle was correlated with a high signal intensity of the proximal graft in the early postoperative period for allograft tendons and in the late postoperative period for allograft tendons. This suggests that the biomechanical effect from the graft bending angle on graft healing may be different for allografts and autografts after ACL reconstruction. LEVEL OF EVIDENCE: III.

Indexed as

AllograftsAnterior Cruciate Ligament ReconstructionAutograftsAdultAnterior Cruciate LigamentAnterior Cruciate Ligament InjuriesCohort StudiesFemurHamstring TendonsHumansMagnetic Resonance ImagingPostoperative PeriodTibiaTransplantation, AutologousTransplantation, HomologousWound HealingACLAllograftAutograftGraft bending angleMRISNQ

Identifiers

PMID29574546
OpenAlexW2792083245

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Read underepoch 390

Registered trials

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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.