Evidence map›Paper›PMID 30291399›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2019

A high level of satisfaction after bicompartmental individualized knee arthroplasty with patient-specific implants and instruments.

Takahiro Ogura, Kiet Le, Gergo Merkely, Tim Bryant, Tom Minas

Abstract read
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
–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

19 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Insufficient evidence to confirm benefits of custom partial knee arthroplasty: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Pooled it
  2. [Expert consensus on clinical pathway of high-conformity total knee arthroplasty under the enhanced recovery after surgery protocol].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2026
    Article
  3. Article
  4. [The importance of individual knee arthroplasty].Orthopadie (Heidelberg, Germany) · 2025
    Article
  5. Current status of bicompartmental arthroplasty.Arthroplasty (London, England) · 2025
    Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Relevant changes of leg alignment after customised individually made bicompartmental knee arthroplasty due to overstuffing.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Article
  11. Contemporary knee arthroplasty: one fits all or time for diversity?Archives of orthopaedic and trauma surgery · 2021
    Review
  12. Article
  13. Review
  14. Review
  15. Customised bi-compartmental knee arthroplasty shows encouraging 3-year results: findings of a prospective, multicenter study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020
    Article
  16. Review
  17. Review
  18. Review
  19. Early outcomes of an anatomic trochlear-cutting patellofemoral arthroplasty: patient selection is key.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2019
    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.

Takahiro OguraSports Medicine Center, Funabashi Orthopaedic Hospital, 1-833 Hasama, Funabashi, Chiba, 274-0822, Japan.
Kiet LeNewton-Wellesley Sports Medicine, 2000 Washington St., Blue Building, Suite 423, Newton, MA, 02462, USA.
Gergo MerkelyDepartment of Traumatology, Semmelweis University, Uzsoki u. 29, Budapest, 1145, Hungary.
Tim BryantCartilage Repair Center, Paley Orthopedic and Spine Institute, St. Mary's Hospital, 901 45th Street, Kimmel Building, West Palm Beach, FL, 33407, USA.
Tom MinasCartilage Repair Center, Paley Orthopedic and Spine Institute, St. Mary's Hospital, 901 45th Street, Kimmel Building, West Palm Beach, FL, 33407, USA. tminas@paleyinstitute.org.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeCustomized Individually Made (CIM) Bicompartmental Knee Arthroplasty (BKA) implants and three-dimensional printed customized instruments are available to fit to each patient's unique anatomy, medial or lateral with patellofemoral. This study aimed to evaluate the clinical outcomes after CIM-BKA.

methodsFifty-five patients [59 knees; average age, 51 years; standard deviation (SD), 6.8; range 37-65 years] who underwent CIM-BKA were evaluated over an average of 3.8-year follow-up (SD 1.6; range 1-6 years). Forty-one knees underwent BKA combined medial and patellofemoral replacement (BKA-MP) and 18 knees underwent BKA combined lateral with patellofemoral replacement (BKA-LP). Survival rates, the modified Cincinnati Knee Rating Scale, WOMAC, VAS, SF-36, a satisfaction survey, and radiographic evaluation were used to evaluate outcomes.

resultsOverall, survival rates were 98% and 92% at 2 and 5 years, respectively. Of 56 knees (95%) that did not fail, all patient-reported functional scores significantly improved post-operatively (P < 0.01), regardless of the previous surgeries, with a high level of satisfaction (51/56 knees, 91%). Radiographically, all the femoral components fit perfectly and 56 knees (95%) of the tibial components fit with less than 2 mm of undercoverage or overhang. Three knees (5%) required the conversion to TKA and 17 knees (29%) required subsequent surgical procedures, of which multiply operated knees had higher rate than virgin knee [14/40 (35%) vs. 3/16 (19%)].

conclusionCIM-BKA allowed precise fit of the components and provided a significant improvement post-operatively with a high level of satisfaction over short- to mid-term follow-up. This novel CIM-BKA is resurfacing, and does not require 10-mm faceted cuts, being only 3-mm-thick, which preserves bone stock for the future. It may be a promising option for relatively young active patients with bicompartmental osteoarthritis with a longer term follow-up being necessary. LEVEL OF EVIDENCE: IV.

Indexed as

Knee ProsthesisPatient SatisfactionProsthesis DesignAdultAgedArthroplasty, Replacement, KneeFemaleFollow-Up StudiesHumansKaplan-Meier EstimateKneeKnee JointMaleMiddle AgedObserver VariationOsteoarthritis, KneeBicompartmental knee arthroplasty; osteoarthritisCustomized individually madePatient-specific implantationResurfacing

Identifiers

PMID30291399
PMCPMC6527787

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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.