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Arthroscopic Lateral Retinacular Release and Modified Goldthwait Technique for Patellar Instability.

ABSTRACT: Surgical options for patellofemoral (PF) disorders include proximal or distal realignment, cartilage restoration techniques, open or arthroscopic lateral retinacular release, and medial soft-tissue reefing. Skeletal immaturity and donor-site morbidity can be of concern in most reconstructive procedures. The Goldthwait procedure with hemi-patellar transfer and medialization combined with arthroscopic lateral retinacular release results in medialization of the PF contact point in flexion and corrects maltracking to prevent recurrent patellar dislocation. This functional procedure is indicated for PF instability and has historically been used in children to accommodate the immaturity of the tibial tubercle and physis. The purpose of surgical correction is to improve PF tracking, reducing the lateralizing forces on the patella with the correction of the Q angle (angle between the quadriceps tendon and patellar tendon). The purpose of this Technical Note was to describe, in detail, arthroscopic lateral retinacular release combined with the modified Goldthwait procedure for recurrent patellar instability.

SUBMITTER: Felli L

PROVIDER: S-EPMC6926311 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Arthroscopic Lateral Retinacular Release and Modified Goldthwait Technique for Patellar Instability.

Felli Lamberto L Lovisolo Stefano S Capello Andrea Giorgio AG Chiarlone Francesco F Formica Matteo M Alessio-Mazzola Mattia M

Arthroscopy techniques 20191007 11

Surgical options for patellofemoral (PF) disorders include proximal or distal realignment, cartilage restoration techniques, open or arthroscopic lateral retinacular release, and medial soft-tissue reefing. Skeletal immaturity and donor-site morbidity can be of concern in most reconstructive procedures. The Goldthwait procedure with hemi-patellar transfer and medialization combined with arthroscopic lateral retinacular release results in medialization of the PF contact point in flexion and corre ...[more]

PMID: 31890498

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Project description:PurposeArthroscopic lateral retinacular release (LRR) has long been considered the gold standard for the treatment for anterior knee pain caused by lateral retinacular tightness (LRT). However, one-third of patients experience continuous pain postoperatively, which is thought to be related to persistent maltracking of the patella and altered femoro-tibial kinematics. Therefore, the aim of the present study was to simultaneously assess femoro-tibial and patello-femoral kinematics and identify the influence of arthroscopic LRR.MethodsSixteen healthy volunteers and 12 patients with unilateral, isolated LRT were prospectively included. Open MRI scans with and without isometric quadriceps contraction were performed in 0°, 30° and 90° of knee flexion preoperatively and at 12 months after surgery. Patellar shift, tilt angle, patello-femoral contact area and magnitude of femoro-tibial rotation were calculated by digital image processing.ResultsPostoperatively, patellar shift was significantly reduced at 90° of knee flexion compared to preoperative values. The postoperative patellar tilt angle was found to be significantly smaller at 30° of knee flexion compared to that preoperatively. Isometric muscle contractions did not considerably influence patellar shift or tilt in either group. The patello-femoral contact area increased after LRR over the full range of motion (ROM), with significant changes at 0° and 90°. Regarding femoro-tibial kinematics, significantly increased femoral internal rotation at 0° was observed in the patient group preoperatively, whereas the magnitude of rotation at 90° of knee flexion was comparable to that of healthy individuals. The pathologically increased femoral internal rotation at 30° without muscular activity could be significantly decreased by LRR. With isometric quadriceps contraction no considerable improvement of femoral internal rotation could be achieved by LRR at 30° of knee flexion.ConclusionsPatello-femoral and femoro-tibial joint kinematics could be improved, making LRR a viable surgical option in carefully selected patients with isolated LRT. However, pathologically increased femoral internal rotation during early knee flexion remained unaffected by LRR and thus potentially accounts for persistent pain.Level of evidenceII.

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Arthroscopic Lateral Retinacular Release and Modified Goldthwait Technique for Patellar Instability.

Publications

Arthroscopic Lateral Retinacular Release and Modified Goldthwait Technique for Patellar Instability.

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