Kevin Garnett added 14 points and grabbed eight rebounds while Glen Davis scored 13 for the Celtics, who used a sizzling 62.2 field goal percentage to notch their sixth win in nine games.
The Celtics were especially hot in the final quarter, connecting on 13-of-15 shots to win going away and pull to within a half-game of idle Atlanta for the third-best record in the Eastern Conference.
The Pistons, who were without Ben Wallace and Rodney Stuckey because of injuries, lost forward Tayshaun Prince to a back injury in the first quarter.
Will Bynum scored 16 points and had seven assists for Detroit, which dropped its ninth game in 11 tries.
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