Not only the amount of added drug can alter the dissolution profile of the scaffolds, but also the added plasticizer. To determine the influence of the plasticizer on the dissolution profile, scaffolds with and without added triethyl citrate were printed and their dissolution profile under sink conditions monitored (Figure ). For the sample containing A-BuOzi-A, no plasticizer influence was observed, as the samples with and without triethyl citrate dissolved fully within the first 3 min of the experiment and reached a plateau at 100% drug release shortly after. On the contrary, for the A-BuOx-A and A-PentOzi-A based scaffolds, the addition of the plasticizer resulted in a slower dissolution compared to the scaffolds without. Without the plasticizer, the scaffolds were dissolved within approximately 2.5 min, whereas the addition of plasticizer extended the dissolution time to 30 min. For the samples containing A-PentOx-A, identical behavior between the samples was observed in the first 5 min of the experiment independent on the addition of plasticizer, but after 6 min a drop to 60% drug concentration was determined for the sample with plasticizer, whereas the samples without plasticizer showed a drop to 80% drug concentration. This was probably caused by partial precipitation of the drug or coacervation of the drug with the polymer. However, this could not be visually confirmed.