PHILADELPHIA - The 76ers will play in Atlantic City on Saturday, Oct. 13.

Andrew Bynum, Philadelphia's prized off-season acquisition, will not be on the court.

Bynum, 24, will not participate in basketball-related activities for three weeks as a precaution after undergoing a treatment called Orthokine on his knees in Germany during the third week of September. The 76ers begin training camp today. The 7-foot, 285-pound Bynum averaged 18.7 points and 11.8 rebounds for the Los Angeles Lakers last season.

"I was working out a couple of days ago and I just got a little uncomfortable," Bynum said during the 76ers media day Monday afternoon. "They (the 76ers) told me to take the time to let the Orthokine do its work."

Philadelphia will meet the Brooklyn Nets in the 7 p.m. exhibition game at Boardwalk Hall. The game would have given 76ers fans their first chance to see Bynum in the greater Philadelphia area. Philadelphia hasn't played a preseason game in Atlantic City since 1983.

"I'm disappointed," Bynum said, "but I'm going to do everything in my power to get back."

Orthokine involved doctors taking Bynum's blood and then spinning it in a centrifuge to make a serum, which was then injected back into Bynum's knees. The treatment is designed to stimulate healing in arthritic knees. Los Angeles Lakers star Kobe Bryant underwent the treatment before last season.

Bynum said he waited until late September to have the procedure because doctors told him it was better to do it closer to the start of the regular season to get the maximum benefit. The 76ers open at home on Oct. 31 against the Denver Nuggets.

The 76ers also said Bynum has a bone bruise on his right knee. Bynum said the bruise was not related to the Orthokine.

Bynum is the centerpiece of a revamped 76ers roster. Philadelphia acquired him from the Lakers in a four-team deal. The 76ers traded Andrew Iguodala to the Denver Nuggets as part of the trade.

Bynum has been slowed by knee troubles in the past. The Lakers drafted him in the first round of the 2005 draft after he graduated from St. Joseph (Metuchen) High School in Middlesex County. Bynum has played in 55 or fewer games four times in his seven-season career. Bynum said the Orthokine should make him more durable.

"The treatment definitely worked," he said. "I'm feeling a lot better."

Bynum and the 76ers said the lack of training camp shouldn't slow the center that much.

"I think we'll be a lot better once Andrew gets back," 76ers point guard Jrue Holliday said. "I know getting that point guard-big-man chemistry might take a little longer."

Free throws: The 76ers also announced that they extended coach Doug Collins' contract through the 2013-14 season. Philadelphia is 76-72 in two seasons under Collins. Last season, the 76ers advanced to the second round of the playoffs for the first time since 2003.

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