PEDO pt 2 Flashcards
a basic rule in space management in the developing dentition is that eruption of anterior teeth should be reasonably symmetrical. why?
asymmetry in exfoliation may lead to significant midline deviations
in the primary dentitions, what appliances are indicated for space maintenance for first primary molars? second primary molars? incisors?
- first primary molars: band and loop space maintainer for unilateral and bilateral loss
- second primary molars: distal shoe or acrylic partial
- incisors: consider esthetics and speech; use fixed or removable appliance
in the mixed dentition, what appliances are indicated for space maintenance for primary mandibular canines? first primary molars? second primary molars?
- primary mandibular canines: lower lingual holding arch
- first primary molars: band and loop space maintainer unilateral, or palatal holding arch bilateral
- second primary molars: palatal holding arch for unilateral and bilateral loss
T or F:
loss of a primary incisor in the primary dentition usually causes loss of overall arch circumference
- false
- generally does not cause loss of overall arch circumference
- might result in localized space loss, especially if there was no interdental primary spacing before the loss
replacement of lost primary incisors is considered more for ___ than for space maintenance
esthetics and possibly development of speech
describe removable partial dentures for loss of primary teeth
- posterior adams clasps, C clasps, or ball clasps are placed for retention
- patient is usually at least 3 years old, and it is determined after consultation with parents that there is a reasonable expectation that the pt will tolerate wearing the appliance
describe fixed partial dentures for loss of primary teeth
- orthodontic bands on second primary molars
- 0.036-0.040 inch stainless steel wire
- replacement teeth are fixed to the wire
- appliance is intended mostly for patients younger than 3 years old or if questionable compliance in wearing a removable appliance
lateral ectopic eruption of permanent incisors is characterized by early exfoliation of ___
- a primary lateral incisor
- often results in a midline deviation
- treatment of choice is extraction of remaining lateral so as to minimize a midline deviation
localized space loss can occur very quickly after loss of a permanent tooth. what is the treatment for space maintenance?
- an appliance should be constructed and inserted as soon as possible after tooth loss
- a removable appliance with fingers springs, or fixed orthodontics
unilateral primary canine loss usually causes what?
- lingual collapse of permanent incisors
- loss of arch length
- increased overbite - after lingual collapse, the mandibular incisors erupt further, increasing overbite
- increased overjet secondary to lingual collapse of mandibular incisors
- midline deviation to the side of canine loss
bilateral primary canine loss usually causes what?
- lingual collapse of permanent incisors
- loss of arch length
- increased overbite - after lingual collapse, the mandibular incisors erupt further, increasing overbite
- increased overjet secondary to lingual collapse of mandibular incisors
what appliance should be used for bilateral canine loss in the mixed dentition?
lower lingual holding arch
what are the treatment options for unilateral canine loss in the mixed dentition?
- extract contralateral primary canine and place lower lingual holding arch
- lower lingual holding arch with a spur if a midline deviation has not occurred (prevents distal drift)
what are the treatment options for unilateral and bilateral primary first molar loss in the primary dentition? what appliance should you avoid?
- band and loop space maintainer for unilateral and bilateral
- do not use lower lingual holding arch until permanent incisors are erupted (incisors typically erupt lingually and can get trapped by the appliance)
what are the treatment options for unilateral and bilateral primary first molar loss in the mixed dentition?
- unilateral: band and loop
- bilateral: lower lingual holding arch or palatal holding arch, or nance appliance
what size stainless steel wire is used to fabricate a distal shoe space maintainer?
0.040 inch
acrylic partial dentures might be indicated for patients what what medical conditions (these conditions contraindicate a distal shoe space maintainer)?
- blood dyscrasia
- congenital heart defect
- immunosuppression
- diabetes
most “kiddie” partial dentures are fabricated such that the acrylic is positioned mesial to the soft tissue contour of what tooth?
first permanent molar (this allows for the unimpeded eruption of the first permanent molar)
unilateral loss of a second primary molar in the mixed dentition usually requires what appliance?
bilateral holding arch
what are the appropriate appliance choices for bilateral tooth loss?
- lingual holding arch
- palatal holding arch
- nance holding arch
- removable appliance
what are the factors you should consider in planning for space maintenance in terms of the amount of resorption of primary roots?
- if more than 1/4 of the root remains owing to normal resorption, space maintenance is likely necessary
- if less than 1/4 of the root remains and if there is no bone left between the primary tooth and permanent tooth, space maintenance is likely unnecessary
when planning for space maintenance, if there is no bone remaining between the primary molar and permanent premolar and if the cusp tip of the permanent tooth is radiographically at the level of the furcation, is space maintenance necessary?
no
if bone is interposed between the primary molar and the permanent premolar, is space maintenance necessary?
yes, it is usually indicated
if there is bone destruction in the region of the primary molar furcation, it is possible that the permanent tooth may erupt very early, with less than ___ root completion. however, it is also possible that bone will ___
- 3/4
- form again (covering the permanent tooth)
describe the implications of not using a space maintainer
- most space closure occurs within the first 6 months, and can even occur in days
- if the prediction of eruption of the permanent tooth is difficult, the dentist should use a space maintainer
in the molar area, closure occurs essentially by ___, not ___ movement of the tooth
- tipping
- bodily
T or F:
active eruption of a neighboring tooth tends to decrease the amount of space loss
false, it tends to increase the amount of space loss
are chronologic age and average eruption times important factors in planning space maintenance?
- no
- it is more important to consider things like root development of erupting teeth
what is the “rule of 7” for primary molars?
- eruption is delayed if loss of the primary molar occurs before age 7
- eruption is accelerated if loss of the primary molar occurs after age 7
- this does not mean that space maintenance is not needed after age 7
first permanent molars may become impacted under the distal aspect of the second primary molar. which arch is this more common in?
maxillary
what is the treatment for an ectopic permanent molar that has become impacted under the distal aspect of the second primary molar?
- varies in severity; if mild, it might self correct
- treatment can include an orthodontic separator, titanium clip separator, brass ligature wire, humphrey appliance, or nance appliance and open coil spring
distal eruption of premolars is most common in which premolars?
mandibular second premolars
in cases where a permanent premolar erupts in a distal direction, it typically resorbs the distal root of the second primary molar but not the mesial root, requiring extraction of the primary molar. is space maintenance necessary?
yes, unless the cusp tip of the premolar is at the level of the floor of the pulp chamber of the primary molar and if, on extraction, the permanent tooth can be visualized
is buccal or lingual eruption of permanent premolars common?
yes
what is the treatment of choice for the buccal or lingual eruption of a permanent premolar?
- if the primary molar is not ready to exfoliate within a few weeks, extraction of the primary molar is the treatment of choice
- after extraction, the permanent premolar tends to move into the correct position as long as there is adequate space
what is the incidence of akylosed primary molars?
- occurs in 1% of african americans and 4% of whites
- has a familial pattern
- higher prevalence with congenitally absent premolars
ankylosis of primary molars usually begins after ___ begins
root resorption
how can an ankylosed primary molar be diagnosed?
- appearance (out of occlusion)
- no mobility, even with advanced resorption
- hollow sound when tapped
- perhaps seen on radiograph (break in periodontal membrane)
what is the treatment for an ankylosed tooth?
- possibly no treatment
- observe for space loss and tipping of adjacent teeth
- if ankylosed tooth is below the normal height of contour of the interproximal surface of the adjacent tooth, extract and consider space maintenance
- as a temporary treatment, a SSC or composite bonding has been used to extend the existence of the ankylosed tooth
what is the incidence of congenitally absent teeth (excluding 3rd molars)?
1.5-10%
if third molars are not included, the most common congenitally missing tooth is the ___, followed by the ___, followed by the ___
- mandibular second premolar
- lateral incisor
- maxillary second premolar
is gingivitis common in children?
yes, and is treated with improved oral hygiene
for children with gingivitis, parental participation in oral hygiene is necessary in children younger than ___ because of the child’s lack of manual dexterity
- 8 years old
- parental supervision is often necessary for older children
what is puberty gingivitis?
- prepubertal and pubertal period
- characterized by enlarged, bulbous interproximal gingival tissue on the labial aspects of the anterior teeth
what is the treatment for puberty gingivitis?
improvement in oral hygiene, removal of local irritants, and nutritional counseling
what are some common conditions in children that can aggravate gingivitis?
mouth breathing, crowded teeth, erupting teeth, and braces
what are the three types of herpes simplex infections that occur in children?
- primary herpetic gingivostomatitis
- acute herpetic gingivostomatitis
- recurrent herpes simplex (cold sore or fever blister)