Sweep1 Flashcards
Elevation over
intact bone – flap margin should NOT rest over an osseous defect
Vertical (Oblique) Releasing Incision
– Permits soft tissue reflection without ——
– Oblique – base is broader than —–
– ——– margin at the line angle of the tooth
– Incision over intact bone, but not on —–
tearing
apex
Cross gingival
osseous prominence
Reflection
– Sharp end of periosteal elevator between periosteum and bone
– Elevate along a broad front
Open extractions indicaitons
Avoidingneedforexcessiveforce • Densebone • Exostosis • Rootmorphology – Multirooted teeth – Dilaceration – Internal resorption
Fissure bur (703,701) to
section = divide tooth through pulpal floor into furcation
3rd molar • Crown Formation ~
14 years
3rd molar • Root Formation approximately —– by 16 years
50%
3rd molar• Average formation is —- years and as late as — years
20
24
3rd molar • Position does not change substantially after —- years
25
Theories behind impacted 3rds
- Differential root growth between mesial & distal
- Inadequate arch space
- Dental development lags skeletal development
- Obstruction secondary to cyst, tumor, supernumerary teeth
Winter’s Classification
- Based on inclination of impacted tooth to long axis of 2nd molar
- Mesioangular
- Distoangular
- Horizontal
- Vertical
3rd molar Patient Selection “Ideal”
- 2/3RD root formation
- 18-25 year old
- Healthy
- No psychological contraindications
- No job restrictions to “numb lip”
Order of needed extractions
Mn3rds>Mx3rds>MxCanine>MnPM>MnCanine >MxPM>MxCI>MxLI>Mn2nd molar
Straight Elevators
Primary use: for expansion of alveolus and loosening of tooth/PDL
Often used incorrectly: do not fulcrum off the adjacent tooth
Care must be used to avoid damage to adjacent tooth
Use with working end pointed from facial toward the lingual or apex
