With Richard Hamilton sidelined, the Detroit Pistons abandoned their three-guard lineup and used a bigger starting unit that stifled the Milwaukee Bucks. Tayshaun Prince scored nine of his 19 points in the decisive third quarter and Allen Iverson added 18, lifting the Pistons to an 87-76 victory Saturday night. The Bucks had won three consecutive games, averaging 106 points during the streak. The Pistons, starting 6-foot-9 Amir Johnson in place of Hamilton, a slim 6-7 guard, held Milwaukee to 30 percent shooting. “Everything got started because defensively we were very good,” Detroit coach Michael Curry said. Johnson had eight points, 11 rebounds and four blocked shots, giving the Pistons a different defensive look from their usual lineup that consists of 6-11 Rasheed Wallace as their only big starter. The Pistons acknowledged after the game that they are better defensively with Johnson on the floor, and better offensively when Hamilton and Iverson are on the court together with guard Rodney Stuckey. “When we have the bigger lineup, obviously we’re better defensively,” Prince said. “It’s kind of pick and choose. “Sometimes you are going to need the offensive side, but more importantly you’re going to need the defensive side.” The game was tight until Detroit went on a 27-5 run midway through the third quarter. Milwaukee missed 14 of 17 shots during one stretch of the period, trailed 73-55 after three quarters and never got close again. “We’ve been good [defensively] in …