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. 2017 Nov 14;12(1):173.
doi: 10.1186/s13018-017-0676-y.

Treatment for lateral patellar impingement syndrome with arthroscopic lateral patelloplasty: a bidirectional cohort study

Tianhao Wu  1 , Shiyu Tang  2 , Fei Wang  3
Affiliations

Treatment for lateral patellar impingement syndrome with arthroscopic lateral patelloplasty: a bidirectional cohort study

Tianhao Wu et al. J Orthop Surg Res. .

Abstract

Background: Anterior knee pain is one of the most common musculoskeletal complaints of young patients. We notice that some patients had normal femoral trochlear, medial and lateral patellar retinaculum, and special patellar morphology, which resulted in a series of symptoms in the flexion of the knee due to the impingement of the lateral articular surface of the patella with the femur. We firstly termed this pathologic process as lateral patellar impingement syndrome (LPIS). This ambispective cohort study was to explore the curative effect of arthroscopic lateral patelloplasty for early LPIS.

Methods: Thirty-five early LPIS patients which underwent arthroscopic lateral patelloplasty were enrolled in our study. Evaluations consisted of pre- and postoperative symptoms, physical examinations, radiographs, and questionnaires. The Lysholm score, patellar suitable angle, patellar tilt angle, and patellar lateral shift were measured with the CT scan and Merchant X-ray film. The efficacy was graded as excellent, good, fair, and poor according to the patient's subjective evaluation.

Results: The patients were followed up for an average of 41.1 ± 18.6 months. The efficacy results were excellent in 6, good in 26, fair in 2, and poor in 1. There were statistical differences in pre- and postoperative Lysholm scores (80.66 ± 5.51 vs 81.91 ± 6.21) (P < 0.05). The pre- and postoperative congruence angle, patellar tilt angle, and patellar lateral shift were significantly different (P < 0.05).

Conclusions: Arthroscopic lateral patelloplasty is an effective and minimal-invasive method for patients with lateral patellar impingement syndrome.

Keywords: Arthroscopy; Lateral patellar compression syndrome; Lateral patellar impingement syndrome; Lateral patelloplasty.

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Conflict of interest statement

Ethics approval and consent to participate

This study was approved by the Third Hospital of Hebei Medical University and followed the Declaration of Helsinki and was approved by the ethics committee of the Third Hospital of Hebei Medical University. Informed consent were received from all patients.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
a Anterior lateral approach of the knee arthroscopy. b The method of suture
Fig. 2
Fig. 2
MRI features of the patients before surgery
Fig. 3
Fig. 3
a-b Preoperative and c-d postoperative X-ray films of the patients
Fig. 4
Fig. 4
Subjective evaluation of the curative effect
Fig. 5
Fig. 5
Typical case I: female, 41 years old, pain for 48 months. a Preoperatively, Lysholm score 74, CA 25°, PTA 10°, and PLS 9 mm; CT scan showed Wiberg IV patella. b After the operation on the left knee, Lysholm score 75, CA 1°, PTA 9°, and PLS 8 mm; CT scan showed approximate Wiberg II patella
See this image and copyright information in PMC

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