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Assessment of fusion. (A) Representative 8-week postoperative radiographs from each treatment group. Ratios represent relative HA:DBM particle content. (B) Fusion scores as determined by manual palpation by three blinded observers. Scoring was based on detectable motion between L4 and L5 segments. (C) Fusion rates were calculated based on fusion scores, where unilateral lack of motion was considered successfully fused.
