lecture 7 Flashcards
(45 cards)
recall for patients during ortho how long?
2-3 months
ortho for longer than how many years can cause tooth resorption
6 yrs
factors that determine presence and form of pappillae?
alveolar bone crest height, shape of tooth, distance and inclincation between teeth. diverging of the teeth due to ortho.
if contact beyond _____ mm more likely to cause black triangle
5mm
options for treatment of black triangle?
parallel the roots through ortho, mucogingival surgery with coronally positioned flap. stripping mesio-distal enaml reduction. square teeth out and reposition
what happens when tooth is moved outside of bony housing?
no bone will form, but a dehiscence will
common reasons for perforation of cortical plate?
mandibular anteriors frontal expansion, maxillary posteriors when fixing cross bite, maxillary incisors when fixing overjet and jiggling of teeth
Before any kind of orthodontic therapy is started, it is important to
check the bucco-lingual thickness of the bone and soft tissues on
the __________ side of all teeth, which are to be moved.
pressure
When tissues are delicate and thin, careful instructions in adequate
plaque control measures should be provided in order to reduce the
risk for development of labial _________
gingival recession
If surgical intervention is considered necessary in order to reduce
the risk for development of soft tissue recessions, this should aim at
increasing_______________(e.g. grafts), and not
the ___________________
thickness of the covering tissue not the apico-coronoal width of the gingiva
is pretreatment evidence of periodontal tissue destruction a contrainidcation for ortho?
no
how does periodontal trt help ortho
control of inflammation, frenectomy, gingivectomy, correction of altered passive eruption, correction of recession, lack of attached keratinized tissue, impacted tooth exposre
if youre probing an inflamed pocket, what are you reaching
CT
if probing in health patient, where are you probing?
at JE
side effect of frenectomy?
loss of interdental papilla
difference between frenotomy and frenectomy
frenecomy is cutting the muscle, frenotomy is removal of the attachment of frenum to gingiva and periosteum is severed. frenum is relocated several mm up on to the alveaolar mucosa
downfall of frenotomy
relapses. but better esthetic results
when should you go a frenotomy or frenectomy in relation in treatment?
after or towards the end of trt
why could a gaft not work?
wont work if tooth is still moving
how does ortho trt help periodontium?
improvie OH, correction of infrabony defects, correction of overjet/overbite, molar uprighting/furcation involvement, space creation for implant therapy, teeth extrusion, teeth intrustion, correction of recession, correction of traumatic occlusion
Infrabony/ angular bony defects may
develop as a result of what 2 things
as a result of destructive periodontitis
- by orthodontic tipping and/or intruding
movements of teeth harboring plaque
Orthodontic movement of teeth into inflamed
infrabony defects may create higih risk for what
a high risk for additional
periodontal destruction
how do you eliminate angular bony defects with ortho treatment?
bodily movement into the infrabony defect
what happens to furcation involved dentition?
it either remains the same or gets worse. simultaneous extrusion may worsen this specially in presence of inflammation
