1. A method of correcting a digital dental arch model to accurately reflect a current arrangement of teeth of a subject, the method comprising: positioning a plurality of individual physical tooth models of the subject's teeth within an impression of a current dental arch of the subject, wherein the plurality of individual physical tooth models comprises a first set of fiduciary marks in a first positional arrangement, the positioning comprising: placing the plurality of individual physical tooth models within the impression such that the first set of fiduciary marks faces away from the impression; scanning the plurality of individual physical tooth models that is positioned in the impression, including the first set of fiduciary marks, to achieve a first representation of the current dental arch of the subject; comparing the first representation of the current dental arch of the subject with a digital model of at least two teeth of a dental arch of the subject comprising a second set of fiduciary marks in a second positional arrangement, the second set of fiduciary marks being positioned on teeth within the digital model of at least two teeth of the dental arch of the subject, the digital model of at least two teeth of the dental arch of the subject being a digital model of at least two teeth of the dental arch of the subject before a latest treatment that resulted in the current dental arch of the subject, wherein the comparing the first representation of the current dental arch of the subject with the digital model of at least two teeth of the dental arch of the subject comprises: comparing the first positional arrangement of the first set of fiduciary marks, including fiduciary marks on at least two teeth in the first representation of the current dental arch of the subject, with the second positional arrangement of the second set of fiduciary marks; based on the comparing of the first representation of the current dental arch of the subject with the digital model of at least two teeth of the dental arch of the subject, adjusting a position of at least one tooth of the teeth in the digital model of at least two teeth of the dental arch of the subject to achieve an adjusted digital dental arch model that comprises an adjusted positional arrangement of the second set of fiduciary marks, wherein the adjusted positional arrangement of the second set of fiduciary marks on the teeth in the adjusted digital dental arch model reflect the positions relative to each other of the first set of fiduciary marks in the first representation of the current dental arch of the subject, and wherein the adjusted digital dental arch model is a second representation of the current dental arch of the subject; and producing a base plate based on the adjusted digital dental arch model, the base plate being configured for receiving the individual physical tooth models of the teeth of the subject such that the first set of fiduciary marks on the individual physical tooth models is arranged in a third positional arrangement, wherein the third positional arrangement of the fiduciary marks on the individual physical tooth models corresponds with the adjusted positional arrangement of the second set of fiduciary marks on the teeth in the adjusted digital arch model.