L1 - Intro Flashcards
definition of excellent prognosis
no bone loss, excellent gingival condition, good patient cooperation, no systemic environmental factors
definition of good prognosis
one or more of the following
- adequate remaining bone support, adequate possibilities to control etiologic factors and establish a maintainable dentition, adequate patient cooperation, no systemic environmental factors or well controlled systemic factors
fair prognosis
one or more of the following
- less than adequate remaining bone support, some tooth mobility, grade I furcation involvement
- adequate maintenance possible, acceptable patient cooperation, presence of limited systemic/ environmental factorss
poor prognosis
one or more of the following
- moderate to advanced bone loss, tooth mobility, grade I and II furcation involvments, difficult to maintain areas and or doubtful patient cooperation, presence of systemic / environmental factors
questionable prognosis
one or more of the following: advanced bone loss, grade II and III furcation involvments, tooth mobility, inaccessible areas, presence of systemic / environmental factors
- provisional prognosis allows the clinician to initiate treatment of teeth that have a doubtful outlook in the hope that a favorable response may tip the balance and allow teeth to be retained
individual tooth prognosis
determined AFTER the overall prognosis and is affected by it
ex- in a patient with a poor overall prognosis, the dentist likely would not attempt to retain a tooth that has a questionable prognosis because of local factors
local factors
- plaque/ calculus
- restorations
- furcation involvment
- root concavitites/ proximity
- short roots
- tooth mobility
prosthetic / restorative factors
- caries
- non-vital teeth
- root resorption
- abutment selection
degree on condylar inclination on semi-adjustable
why?
25 degrees
majority of the population has condylar guidance > than 25
so clear or prevent contacts at 25 degrees will not caue any premature contacts intra-orally
using articulator when
when excursive movements need attention in tx (almost always)
all fixed partial denture work
complete and partial dentures because worried abot dynamic occlusion
occlusal equilibration on a posterior reconstruction or post orthodontic tx or a full arch/ mouth reconstruction
ondylar inclincation more than 25
then when go into protrusive – dont get interferences
positive error
error on the occlusal surface is one which occurs when the articulator undercompensates for the mandibular movement, resulting in a positive feature existing on the occlusal surface where that feature should be similar or non-existent
- a cusp tip or ridge that is too high or one that in in the path of an opposing ridge or tip during a mandibular excursion
negative error
occurs when the articulator over compensated for a mandibular movement
negative and positive error
classification of errors in occlusal restorations fall into these two categories (positive and negative)
balanced occlusion usually in
denture patients
can have contact on both sides during excursive movements?
MIP usually used for
preferred postion for smaller restorations - like crowns and 3 units ** only if hand articulated and have posterior teeth / dentate patients
class I usually ___ vertical overlap
no more than 2mm vertical overlap
class II div 1 and 2 overlap?
usually 100 %
class III usually are
edge to edge
harder to restore 3 unit bridge with canine guidance or group function
group function – more teeth to worry about and occlusion on the bridge as well if canine guidance was there - no intererences exist on that side)
why canines good
canines suited to take EXCURSIVE movements
- long and largest roots
- excellent crown to root ratio
- set in dense bone
sensory input of the anterior teeth
u of shimstock and other one we use for crowns? dentures?
8 u for shimstock
- does not mark but can see how tight something is - like slide it through
21 u – corwns
100 u - denture us e
size of contact
the larger the size of the marking – the larger the contact area
intensity of contact
the darker the spot – the more likely it is a heavier contact
halo / bullseye contacts are heavy contacts
