In the summer of 2004, Marcello Lippi left Juventus to take charge of the Italy national team and was replaced by Fabio Capello. In his fourth season with the club, Buffon made 38 appearances in Serie A and 48 in all competitions that season as he won his third Serie A title in four years with Juventus, winning once again the Serie A Goalkeeper of the Year award for the fifth time in his career. Juventus were knocked out in the quarter-finals of the Champions League, against eventual winners Liverpool, and in 2005, Buffon was nominated for the UEFA Team of the Year for the fourth consecutive year.  In August 2005, Buffon collided with Milan midfielder Kaka during the annual preseason Trofeo Luigi Berlusconi match, suffering a dislocated shoulder that required surgery. Milan loaned backup goalkeeper Christian Abbiati to Juventus as compensation while Buffon recovered. Buffon returned to the Juventus starting lineup in November, but injury again sidelined him until January. He recovered in time to help Juventus win their second consecutive Scudetto and his fourth overall, returning to the starting line-up in January 2006, in a Coppa Italia match against Fiorentina. Juventus were, however, once again knocked out in the quarter-finals of the Champions League by runners-up Arsenal, and in the quarter-finals of the Coppa Italia on away goals to eventual runners-up Roma. Buffon was named IFFHS World's Best Goalkeeper for the third time in his career and Serie A Goalkeeper of the Year for the sixth time. He was also placed second in the 2006 Ballon d'Or and eighth in the FIFA World Player of the Year Award behind his winning Italy teammate Fabio Cannavaro, and was elected as the starting goalkeeper for both the 2006 FIFPro XI and the UEFA Team of the Year, following his fifth consecutive nomination. Buffon made his 200th appearance for Juventus that season in a 2-0 away defeat at the hands of Arsenal in the quarter-finals of the Champions League.  On 12 May 2006, several players, including Buffon, were accused of participating in illegal betting on Serie A matches. Buffon voluntarily co-operated, allowing himself to be interrogated by Turin magistrates. While admitting that he did place bets on sporting matches (until regulations went into effect in late 2005, banning players from doing so), he vehemently denied placing wagers on Italian football matches. Despite concerns that he had jeopardised his chance of playing for Italy in the 2006 World Cup, he was officially named Italy's starting goalkeeper on 15 May and helped Italy to win their fourth title. Buffon was cleared of all charges by the Italian Football Federation (FIGC) on 27 June 2007. Following Juventus's punishment in the Calciopoli scandal, in which their two most recent Serie A titles were stripped and the squad were relegated to Serie B and penalized with a point deduction, rumours spread that Buffon would be placed on the transfer market. Buffon elected to remain with Juventus, despite the team's relegation, a decision which made him extremely popular with the Juventus fans.

Answer this question "What did he heal from" by extracting the answer from the text above.
suffering a dislocated shoulder that required surgery.