Download lower incisor with pathology

The extraction of a lower incisor in
orthodontic treatments
www. orthofree.com
indications
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
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Angle class one Molar relationship with arch lenthtooth size discrepancy from 4 to 7 mm, normal
upper arch that does not need premolar
extractions.
Bolton discrepancy with mandibular excess of 4 to 6
mm.
When lower expansion is impossible or
compromising for periodontal health (risk of
gingival recession)
indications




Angle class one biprotrusion with lower front
crowding.
Class two by maxillary squeletal protrusion
with lower incisors crowding.
Mild squeletal class three.
Orthodontic retreatment for relapsing lower
anterior crowding…
Advantages

Extracting one incisor rather then 4 premolars, less
teeth are sacrificed

Shorter treatment time with fixed appliances. The
tooth movement needed is therefore minimal.

Lower incisor extraction is a compromise solution
for adults who need a relatively fast outcome.

No negative consequences on soft tissue profile.
Disadvantages



Acceptable aesthetic result but the occlusion
is not always a perfect class one.
Lower midline deviation.
Formation of a black triangle due to
papillear defect between lower incisors.
counterindications



Angle class II division 2 with deep
overbite.
Tooth size- arch length discrepancy
where premolar extractions are more
convenient.
Important class II or class III squeletal
discrepancy.
Complimentary exams



Study casts
X- Rays
Set Up
Chosing the tooth to be
extracted.

The most malpositioned tooth or the one
with gingival defect ( gum recession)
Pathological Extraction of the 32 and
fracture and important apical lesion on
32 and 33.
Kenza LAHLOU, Aalloula EL HOUSSAINE
Clinical case 1:class III tendency.
Clinical case 2 : Biprotrusion
ROSS J. MILLER, TRANG T. DUONG,
MITRA DERAKHSHAN
Clinical case 3:
José Roberto Oliveira
FLORIACH
Ewaldo Luiz de ANDRADE
Clinical case 4 : lower incisor with pathology
Zachrisson, Keim
Clinical case
Zachrisson, Keim
Closure of extraction space
Reinaldo Mazzottini
Biprotrusion
Kenza LAHLOU, Aalloula EL HOUSSAINE
Thousand years old Oak
tree.
Bibliography
BIONDI Giovanni , via Don Pastega 8, 31052 Varago di Maserada (TV), Italie.International
Orthodontics Vol 4, N° 1 - mars 2006pp. 63-72 Doi : ORT-03-2006-4-1-1761-7227
101019-20060162
ROSS J. MILLER, TRANG T. DUONG,MITRA DERAKHSHAN VOLUME XXXVI NUMBER 2 ©
2002 JCO, Inc.
Zachrisson Keim, VOLUME XXXIX NUMBER 4 © 2005 JCO, Inc.
FLORIACHE José Roberto Oliveira waldo Luiz de ANDRADE, Heterodox extractions analysis
on the malocclusions treatment
PINTO, M. R.; MOTTIN, L. P.; DERECH, C. D.; ARAÚJO, M. T. S ,R Dental Press Ortodon
Ortop Facial 118 Maringá, v. 11, n. 1, p. 114-121, jan. /f ev. 2006
Mazzottini Reinaldo R Clin Ortodon Dental Press, Maringá, v. 4, n. 5 - out./nov. 2005
LAHLOU Kenza , Aalloula EL HOUSSAINE Rev Odont Stomat 2008;37:59-72