Helias couldn't pull it out in the third game.
The Lady Crusaders rallied after losing their first set but Ozark posted a 25-22, 15-25, 25-21 decision in volleyball action Monday at Rackers Fieldhouse.
Brittney Engelbrecht had 13 assists and five service points. Tori Keller had 12 digs and five service points while Erica Haslag had 10 kills and four blocks.
Ozark also won Monday's JV match 25-11, 27-25.
Suzie Kuensting had four kills and three blocks for Helias. Megan Brown had six service points and four digs while Lexy Lamb had three assists. The JV squad is now 13-2.
The Lady Tigers made it a sweep by winning the freshman match 25-21, 25-19.
Abby Shepard had four service points and four assists. Laura Vanderfeltz had 12 digs and four service points while Mia Millard had seven digs, four service points and two kills. The freshman team is now 13-2.