Development of soft tissue balance system and its application for quantitative knee collateral ligament release:an experimental study
- VernacularTitle:软组织平衡定量评定系统的研制及其应用的实验研究
- Author:
You WANG
;
Haipeng WANG
;
Kerong DAI
- Publication Type:Journal Article
- Keywords:
Arthroplasty,replacement,knee;
Medial collateral ligament,knee;
Pressure
- From:
Chinese Journal of Orthopaedics
1996;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective In order to meet the quantitative measurement of soft tissues balance required in the TKR,a new soft tissues balance navigation system have been developed and used experimentally in adjusting the soft tissue release of medial collateral ligament(MCL)and quantitative measurement of the force change in extension gap or flexion gap after various kinds of MCL release during TKA.Methods Six precise load sensors have been embedded in the front measure device,which is inserted into the cutting gaps of the 5 knee joints of cadavers to measure the force of MCL before or after various types of releases.The device has the function of changing distance between its upper and lower plates by the mechanical structure for the adjustment of different bone cutting space.The reading of the sensors representing the force are displayed in three or two-dimensional manner in real-time with accuracy of better than 0.098 N per bit.Results The preliminary test shows that the measurement system can accomplish the force measurement and the distance adjustment in the knee joint,and its application for measuring the force of medial collateral ligament shows a quantitative force change in MCL in different knee position and different way of release.Release of the posterior portion of MCL mainly produces laxity of MCL at full extension with 33.61% reduction rate of tensional force in value.Complete medial collateral ligament release causes laxity of MCL both at full extension and 90? flexion with reduction rate of 44.96% or 41.30% respectively.Conclusion The soft tissues balance measurement device are capable of clinical use for navigation of soft tissue balance in TKA and performing knee dynamics research.It has been proved quantitatively that the posterior portion of MCL plays an important role in stability for extended knee while the anterior portion of MCL mainly stabilizes the knee in flexion.
