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Combined anterior and rotational laxity measurements allow characterizing personal knee laxity profiles in healthy individuals.

TitleCombined anterior and rotational laxity measurements allow characterizing personal knee laxity profiles in healthy individuals.
Publication TypeJournal Article
Year of Publication2015
AuthorsMouton C, Seil R, Meyer T, Agostinis H, Theisen D
JournalKnee Surg Sports Traumatol Arthrosc
Volume23
Issue12
Pagination3571-7
Date Published2015 Dec
ISSN1433-7347
Abstract

PURPOSE: The aim of this study was to quantify sagittal and rotational knee laxity profiles taking into account individual influencing factors.

METHODS: Linear regression models were used to determine which individual characteristics (age, height, body mass and sex) influenced the outcome in a group of 104 healthy subjects. The standardized residuals were used as individualized (corrected) laxity scores and were combined to determine knee laxity profiles.

RESULTS: Anterior knee laxity was not influenced by individual characteristics. Rotational knee laxity was higher in females and inversely related to body mass. The correlation between anterior laxity and internal rotation scores was weak (r = 0.24, p = 0.02). The proportion of knees concerned by increased laxity scores (scores >1) was similar for anterior displacement, internal and external rotation (15 %). Only 32 % of the tested subjects showed a normal profile (score >-1 and <1) for all three directions, 33 % were concerned by hyperlaxity, 40 % by hypolaxity and 5 % by both.

CONCLUSIONS: The diversity of laxity profiles found here highlights that the interpretation of multidirectional knee laxity is complex and suggests the necessity for individualized care of knee diseases and injuries. These results contribute to the understanding of knee laxity and throw the basis for prevention strategies and improvement of treatment outcomes in injuries and diseases.

LEVEL OF EVIDENCE: Case series with no comparison groups, Level IV.

DOI10.1007/s00167-014-3244-6
Alternate JournalKnee Surg Sports Traumatol Arthrosc
PubMed ID25155050
PubMed Central IDPMC4661198
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