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Appendix 7Index of Orthodontic Treatment Need SpecificationsRe-typed for purposes of clarity APPENDIX INDEX OF TREATMENT NEED — DENTAL HEALTH COMPNENT Grade 1 (none) 1 Extremely minor malocclusions, including displacements less thatn 1 mm Grade 2 (little) 2aIncreased overjet greater than 3.5 mm but less than 6 mm with competent lips 2bReverse overjet greater than 0 mm but less than or equal to 1 mm 2cAnterior or posterior crossbite with less than or equal to 1 mm discrepancy between retruded contact position and intercuspal position 2dDisplacement of teeth greater than 1 mm but less than or equal to 2 mm 2eAnterior or posterior open bite greater than 1 mm but less than or equal to 2 mm 2fIncreased overbite greater than or equal to 3.5 mm without gingival contact 2gPrenormal or post normal occlusions with no other anomalies. Includes up to half a unit discrepancy Grade 3 (moderate) 3aIncreased overjet greater than 3.5 but less than or equal to 6 mm with incompetent lips 3bReverse overjet greater than 1 mm but les than or equal to 3.5 mm 3cAnterior or posterior crossbites with greater than 1 mm but less than or equal to 2 mm discrepancy between the retruded contact position and intercuspal position 3eLateral or anterior open bite greater than 2 mm but less than or equal to 4 mm 3fIncreased and incomplete overbite without gingival or palatal trauma Grade 4 (great) 4aIncreased overjet greater than 6 mm but less than or equal to 9 mm 4bReverse overjet greater than 3.5 mm with no masitcatory or speech difficulties 4cAnterior or posterior crossbites with greater then 2 mm discrepancy between retruded contact position and intercuspal position 4dSevere displacements of teeth greater than 4 mm 4eExtreme lateral or anterior open bites greater than 4 mm 4fIncreased and complete overbite with gingival or palatal trauma 4hLess extensive hypodontia requiring pre-restorative orthodontics or orthodontic space closure to obviate the need for a prosthesis. 4IPosterior lingual crossbite with no functional occlusal contact in one or more buccal segments 4mReverse overjet greater than 1 mm but less than 3.5 mm with recorded masticatory and speech difficulties 4tPartially erupted teeth, tipped and impacted against adjacent teeth Grade 5 (very great) 5aIncreased overjet greater than 9 mm 5hExtensive hypodontia with restorative implications (more than one tooth missing in any quadrant requiring pre-restorative othodontics. 5iImpeded eruptionof teeth (apart form 3rd molars) due to crowding, displacement, the presence of supernumerary teeth, retained deciduous teeth, and any pathological cause. 5mReverse overjet greater than 3.5 mm with reported masticatory and speech difficulties. 5pDefects of cleft lip and palate 5sSubmerged deciduous teeth |
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