In the literature several publications show the advantages of the early arthroscopic stabilization after the first episode of traumatic shoulder dislocation. Nevertheless it is still considered by some authors a controversial topic. The purpose of this paper is a retrospective evaluation of our first 100 cases treated with arthroscopic stabilization. Between September 1989 and May 2005 100 arthroscopic stabilization of first time dislocation were performed in athletes. Mean age at surgery moment was 22 years. 78% of the patients were rugby players. Until October 1995 we used the Transglenoid suture technique in 23 cases and the others 77 cases were stabilized with Suture Anchor technique. The mean follow-up was 7.4 years (range: 3-19 years). Capsular tear with complete labrum detachment (type III lesion) was the most frequent surgical finding. Minor Bony Bankart lesions (<25%) were found in 19 cases. 75 cases (75%) of osteochondral Hill-Sachs lesions and 15 cases (15%) of bone HillSachs lesions were identified. We treated 2 cases of Humeral Avulsion of Glenohumeral ligament (HAGL) with arhtoscopic and mini open technique. According to the Rowe scale we obtained excellent and good results for 96% (74 cases) of the patients treated with the Suture Anchor Technique and in 87% (20 cases) of the patients treated with the Transglenoid technique. Return to sport was allowed after the 4th month, being at pre-injury level for all cases. The average time was 5.3 months (4-7). Many studies have shown a high percentage of redislocation after non-surgical treatment. Younger patients and practicing contact sports, over head sports or sports of high speed (snow skiing, motocross) increase this risk.