Dental attachment placement apparatuses and related systems. An apparatus may include a body having attachments. The attachments, when worn at specified locations on the patient's dentition, may engage with one or more aligners to direct repositioning forces from the aligner(s) to the patient's dentition. The body of the apparatus may have contoured surfaces shaped in accordance with corresponding surfaces of the patient's teeth. The apparatus may also include supports extending from body and that support a corresponding attachment entirely within a corresponding aperture of the apparatus. The supports may include breakable regions to facilitate removal of the attachments from the body.