# COMPARISON BETWEEN PORTALS FOR PLACEMENT OF ANCHORS IN SHOULDER INSTABILITY

## TL;DR

This study compares the effectiveness of two surgical portals for placing anchors in shoulder instability treatments.

## Contribution

The study provides empirical evidence that the 5-o’clock portal offers better anchor placement than the 3-o’clock portal.

## Key findings

- The 5-o’clock portal allows for greater orthogonality in relation to the glenoid rim.
- Anchor placement using the 5-o’clock portal was statistically better than with the 3-o’clock portal.

## Abstract

to radiographically compare the effects of anchor positioning in the arthroscopic treatment of shoulder instability, in the 3- and 5-o’clock portals.

retrospective study of 36 patients, operated by two shoulder surgeons at the Unimed BH hospital, between January 2013 and January 2018. Each surgeon used only one of either the 3- or the 5-o’clock portal. After postoperative radiographs we performed angle comparisons between the greatest glenoidal axis, the angle of anchor insertion and distance from the inferior pole.

the 5-o’clock portal provided better placement than its 3-o’clock counterpart, which allowed for greater orthogonality in relation to the glenoid rim (p < 0.05).

the 5-o’clock portal allowed for better anchor placement than the 3 o’clock one.

Level of Evidence II, Clinical Trial.