Index of Orthodontic Treatment Need (IOTN) Flashcards
(31 cards)
What is the score for excessive hypodontia with restorative implications (ie more than one tooth in any quadrant)?
5h
What is 5i
impeded eruption of teeth (except of 3rd molars)
What is 5a?
increased overjet of more than >9mm
What is the score for reverse overjet of >3.5mm with reported masticatory and/or speech problems?
5m
What is 5p
defects of cleft lip and palate/ other craniofacial abnormality
what is the score for submerged primary teeth?
5s
what is 4h
less extensive hypodontia requiring restorative input or orthodontic space closure
what is the score for an increased overjet of >6mm ≤ 9mm
4a
What is 4b in IOTN?
reverse overjet >4.5mm with no reported masticatory or speech problems
What score would you assign for anterior or posterior crossbites with >2mm displacement
4c
What score would you assign for a reverse overjet of >1mm ≤ 3.5mm with recorded masticatory and speech difficulties?
4m
What is 4I
posterior lingual crossbite (scissor bites) with no occlusal contact in one or both buccal segments
What is 4d?
contact point displacement of >4mm
What score would you assign extreme lateral/AOB of >4mm?
4e
What is 4f in IOTN
Increased and complete overbite with palatal trauma
What is 4t in IOTN
partially erupted teeth impacted against neighbouring tooth
What score do you give supernumerary teeth?
4x
What is 3a in IOTN?
Increased overjet >3.5mm <6mm with incompetent lips
what is 3b in IOTN
reverse overjet of >1mm < 3.5mm
What score would you give anterior or posterior crossbites with >1mm ≤ 2mm discrepancy between CR and CO?
3c
What is 3d in IOTN?
contact point displacement of >2mm ≤ 4mm
What score would you give lateral/AOB of >2mm ≤ 4mm?
3e
What is 3f in IOTN?
deep overbite complete on gingival or palatal tissue without trauma
What is 2a in IOTN?
increased overjet of >3.5mm <6mm but with competent lips
