Table 3 STL measurement rubric consisting of the rating scales and their descriptions for the image quality measurement of the STLs
From: Stereolithography (STL) measurement rubric for the evaluation of craniomaxillofacial STLs
Evaluation item | Qualitative measurement rating scale | ||
|---|---|---|---|
Poor visual acuity Rating = 1 | Partial visual acuity Rating = 2 | Good visual acuity Rating = 3 | |
1. Cranial sutures | Cranial sutures demonstrate poor visual acuity and appear to be smooth. | Cranial sutures demonstrate partial visual acuity and appear to have some definition but still unclear. | Cranial sutures demonstrate good visual acuity and appear clearly defined. |
2. Head of the mandible | Head of the mandible demonstrates poor visual acuity and does not show clear delineation of the different individual anatomical structures. | Head of the mandible demonstrates partial visual acuity and shows some delineation of the different individual anatomical structures but not clearly. | Head of the mandible demonstrates good visual acuity shows clear delineation of the different individual anatomical structures. |
3. Temporomandibular fossa separation | The boundary between the fossa and the adjacent skull demonstrates poor visual acuity. No clear delineation exists between the margins of the fossa and adjacent anatomical structures. | The boundary between the fossa and the adjacent skull demonstrates partial visual acuity. Incomplete separation exists between the margins of the fossa and adjacent anatomical structures. | The boundary between the fossa and the adjacent skull demonstrates good visual acuity. Complete and clear separation exists between the margins of the fossa and adjacent anatomical structures. |
4. Supraorbital foramina | Supraorbital foramina demonstrate poor visual acuity and are not clearly delineated. | Supraorbital foramina demonstrate partial visual acuity and are partially delineated. | Supraorbital foramina demonstrate good visual acuity and are clearly delineated. |
5. Infraorbital foramina | Infraorbital foramina demonstrate poor visual acuity and are not clearly delineated. | Infraorbital foramina demonstrate partial visual acuity and are partially delineated. | Infraorbital foramina demonstrate good visual acuity and are clearly delineated. |
6. Mental foramina | Mental foramina demonstrate poor visual acuity and are not clearly delineated. | Mental foramina demonstrate partial visual acuity and are partially delineated. | Mental foramina demonstrate good visual acuity and are clearly delineated. |
7. Teeth | Individual teeth demonstrate poor visual acuity. Poor discrimination between individual teeth. | Individual teeth demonstrate partial visual acuity. Partial discrimination between individual teeth. | Individual teeth demonstrate good visual acuity. Good discrimination between individual teeth. |
8. Mandibular canal (inferior alveolar nerve) | The mandibular canal demonstrates poor visual acuity and is not clearly delineated. | The mandibular canal demonstrates partial visual acuity and is partially delineated. | The mandibular canal demonstrates good visual acuity and is clearly delineated. |
9. Concentric rings visible (rings score) | Present = 0 | Absent = 3 | |
10. Overall impression of the designer | STL poses relative difficulty in the design of the prosthesis. | STL poses some difficulty in the design of the prosthesis. | STL poses no difficulty in the design of the prosthesis. |