Level 5 | a | Exaggerated over jet > 9 mm |
| h | Multiple ageneses with use of prosthetic implications (more than one teeth). |
| i | Missing by quadrant requiring pre-restorative orthodontic. |
| m | Impacted teeth (except the third molars) due to a discrepancy, a relocation, supernumerary teeth, temporary teeth that are not exfoliated or any other pathology. |
| p | Reversed over jet > 3.5 mm with difficulties of chewing or speaking reported by the patient. |
| s | Sequel of labio?alveolar fissure and/or palatines or temporary submerged teeth. |
Level 4 | a | Increased over jet > 6 mm but ≤9 mm. |
| b | Reverse occlusion with over jet > 3.5 mm with no chewing or speaking difficulties reported by the patient. |
| c | Posterior and anterior cross occlusion with a gap > 2 mm between the centered position and the maximal intercuspidity. |
| d | Relocation of the contact points > 4 mm. |
| e | Anterior or lateral infracclusion > 4 mm. |
| f | Severe and complete supraclusion with associate labial or palatine trauma. |
| h | Less serious agenesis (no more than one missing tooth per quadrant) requiring pre-prosthetic orthodontics or an orthodontic closing of the space to avoid bearing dental prosthesis. |
| l | Posterior linguoclusion with the lack of functional occlusal area in one or both lateral segments of the dental arch. |
| m | Reverse occlusion > 1 mm, but ≤3.5 mm with difficulties of shewing or speaking recorded by the practitioner. |
| t | Partial eruption of teeth inclined or locked against the adjacent teeth. |
| x | Supernumerary teeth. |
Level 3 | a | Increased over jet > 3.5 but ≤6 mm with labial inocclusion. |
| b | Reverse occlusion > 1 mm but ≤3.5 mm. |
| c | Posterior and anterior cross occlusion with a gap > 1 mm but ≤2 mm between the position of centered relation and the maximal intercuspidity. |
| d | Moving of the points of contact > 2 mm but ≤4 mm. |
| e | Anterior or lateral infraclusion > 2 mm but ≤4 mm. |
| f | Exaggerated and complete over jet without gingival trauma. |
Level 2 | a | Exaggerated over jet > 3.5 mm and ≤6 with labial occlusion. |
| b | Overturned overjet > 0 mm, but ≤1 mm. |
| c | Anterior or posterior cross occlusion with a space ≤ 1 mm between the centered position and the maximal intercuspidity one. |
| d | Moving of the contact area > 1 mm but ≤2 mm. |
| e | Anterior or posterior infraclusion > 1 mm but ≤2 mm. |
| f | Exaggerated supraclusion ≥ 3.5 mm without gingival contact. |
| g | Posterior and anterior occlusion almost normal without other abnormalities with an offset less than a 1/2 tooth. |
Level 1 |
| Minor malocclusion with small off set < 1 mm. |