Treatment Planning and Biomechanics Flashcards
-A dental prosthesis definitively attached to remaining teeth or to dental
implants, which replaces one or more missing teeth.
Fixed partial denture (Bridge)
– Natural tooth or implant serving as attachment for Fixed Partial Denture
Abutment
– Extra-coronal restoration cemented to abutment
Retainer
– Artificial tooth suspended from abutments
Pontic
– Rigid (or non-rigid) connecting pontic and retainers
Connector
– The site of the alveolar bone and its covering soft tissues that remains after tooth
loss.
Edentulous Ridge
When teeth have been missing for a long time, extreme closure of the \_\_\_\_\_\_\_\_ can occur which requires more extreme treatment planning and for the general dentist, likely a referral to a prosthodontist for treatment of this complexity.
inter-occlusal distance
Indications for _________:
-Long edentulous spans
-No distal abutment
-Multiple Edentulous spaces
-Abnormal abutments – Tipped, divergent or
few abutments
-Periodontally weakened primary abutments
(Bridge abutments compromised)
-Severe loss of tissue/bone in residual ridge
Removable Partial Denture:
Indications for _______
- To replace function of missing teeth
- To stabilize occlusion and keep teeth from drifting and extruding
- To create esthetics and phonetics
Need Properly distributed abutments
Abutment on both ends of the edentulous space
Span length falls within structural limits
Straight alignment of restoration (slight variations)
Abutment strength
Abutments need to be restorable
Peridontally sound and stable
No questionable pathology (PARL, non-vital)
Occlusal harmony
Fixed partial denture
Contraindications for _______:
Excessive loss of alveolar ridge
Difficultly cleaning
Difficult to make esthetic
Possibly able to correct to some degree with bone graft/augmentation with periodontal surgery Abutments not restorable Short clinical crown Heavily restored already Abutments are periodontally compromised Loss of bone Crown to root ratio Span between abutments too long ***Virgin or minimally restored abutments? Prefer to pursue implant options to preserve these potential abutment teeth.
Fixed Partial Denture
Current PA radiographs (less than
___ months old) to confirm health of
abutments.
6 months
________ is a prerequisite for any fixed prosthodontic
restorations
-Need a zone of attached tissue
- No mobility
-Patient home care adequate
Additionally – Crown to root ratio, Root shape and configuration,
Periodontal ligament area all need to be assessed and evaluated.
Periodontal health
What is the optimum crown:root ratio?
2:3
What is the. minimum crown:root ratio for fixed restorations?
1:1
Exception to Crown to root ratio
guidelines:
If opposing occlusal forces are ______
such as:
Artificial teeth (Full denture, RPD) Periodontally compromised opposing teeth
diminished
For periodontal root configuration, are regular or irregular root forms better for abutments for FPD?
Irregular
\_\_\_\_\_\_: The root surface area (embedded in bone) of the abutment teeth should be equal or surpass that of the teeth being replaced with pontics.
Ante’s Law :
General principle – any FPD replacing more than ___ posterior teeth
has guarded prognosis
2 posterior teeth
______ arch has longer crowns and less tooth inclinations
and therefore can occasionally be acceptable.
Maxillary
When teeth are not perfectly aligned (which is nearly every time), a \_\_\_\_\_\_\_ can be used to identify the path of insertion and to help you create the appropriate planes in tooth preparation to create a path of insertion.
surveyor
Partially Edentulous Patient –___________:
-Also known as Marilyn Bridge
-Conservative enamel only preparation
-Used for single missing tooth with slight to moderate tissue
resorption in missing tooth area
-Only areas of light occlusal stresses and good alignment with
neighboring teeth
-Not indicated for deep vertical overlaps (Deep bite)
-Excellent option in younger patients where age contraindicates
implant or bridge
-Most often used to replace missing maxillary lateral incisors
Resin-bonded
Fixed Partial Prosthesis
A fixed partial denture that has an abutment(s) at
one end with the pontic remaining unconnected
on the other end.
Cantilever Fixed Partial Prosthesis
Indications of _____:
- Implant abutments are soundly integrated
- Implant parallelism
- Availability of bone to support implant
- Patient demonstrates adequate home care
Implant supported FPD
