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, 13 (1), 184

Laser-guided Transtibial Technique Improved Single-Bundle Reconstruction of Anterior Cruciate Ligament


Laser-guided Transtibial Technique Improved Single-Bundle Reconstruction of Anterior Cruciate Ligament

Zhen Yuan et al. J Orthop Surg Res.


Background: The transtibial tunnel technique achieves equal length reconstruction of the anterior cruciate ligament (ACL). This study aimed to investigate whether transtibial tunnel technique can achieve anatomical reconstruction of ACL.

Methods: For 25 corpses, the anterior soft tissue of the knee joint was detached so that the ligamentous surface was fully exposed, then the knee joint was fixed at 90° with an external fixator and the anterior cruciate ligament was removed. Double-sided laser technology was used to establish spatial conformation of ACL.

Results: The male to female ratio of the subjects was 19:6, with an average age of 59.52 ± 11.13 years. Patellar tendon length was 35.23 ± 5.10 mm, tibial eminence length and width was 15.75 ± 2.44 and 7.80 ± 1.28 mm, respectively, and femoral attachment length and width was 15.40 ± 2.17 and 8.97 ± 1.61 mm, respectively. When the flexion turned 90°, the tibial tunnel length was 31.83 ± 4.09 mm and the distance to the tibial plateau, patellar tendon, and medial collateral ligament was 16.33 ± 4.56, 10.79 ± 5.85, and 23.12 ± 5.99 mm, respectively.

Conclusions: With the aid of double-sided laser technology, transtibial tunnel technique can safely achieve single-bundle reconstruction of ACL.

Keywords: Anatomical reconstruction; Anterior cruciate ligament; Double-sided laser technology; Transtibial tunnel technique.

Conflict of interest statement

Ethics approval and consent to participate

This study was approved by the Affiliated Suzhou Hospital of Nanjing Medical University Ethics Committee. No written/verbal consent was needed for this study because cadavers were used.

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.


Fig. 1
Fig. 1
Measurement with the knee secured at 90°
Fig. 2
Fig. 2
Double-sided laser technology. One of the ACL spatial configuration locating methods. The central point of ACL was located and marked with gentian violet. The point C and D was aligned to create plane A using high-accuracy surface-type laser transmitter; The point C and D was aligned to create plane B using another high-accuracy surface-type laser transmitter; Plane A and B intersected a spatial line L, and line L passed through point C and D, and point C and D defined the ACL spatial configuration. Line L passed through the tibial exit point and femoral exit point as E and F, respectively. If the tunnel is straight, then CDEF is on the same line
Fig. 3
Fig. 3
The measurement of the tibia (a). Transverse diameter (b). Anteroposterior diameter (c, d). The anteroposterior length and the maximum width of the right knee ACL tibial attachment, respectively
Fig. 4
Fig. 4
The measurement of the femur. a The length of the femoral attachment. b The width of the femoral attachment. c The distance from the femoral attachment to the posterior wall. The lateral intercondylar eminence and lateral furcatus eminence were indicated by blue

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