Term
| That branch of dental art and science pertaining to the restoration and maintenance of oral function and preservation of the remaining tissues, by replacing missing teeth and structures with artificial devices is? |
|
Definition
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|
Term
| A removable partial denture is solely supported by teeth? True or false |
|
Definition
| False; can be tooth supported or tooth and tissue supported |
|
|
Term
| Fixed, removable,implants, and maxilofacial appliances are all under the umbrella of prosthodontics? True or falso |
|
Definition
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|
Term
| How long must implants heal before an abutment is placed? |
|
Definition
|
|
Term
| An implant is a removable prosthesis? Trur or false |
|
Definition
| False; it is fixed/ cemented |
|
|
Term
| Restorations that fit largely within the crown of a tooth are called |
|
Definition
|
|
Term
| the walls in an inlay preparation are? |
|
Definition
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|
Term
| Inlays replace cusps: T or F |
|
Definition
| False;onlays replace cusps |
|
|
Term
| An amalgam is a direct or indirect restoration? |
|
Definition
| Direct;since it is fabricated and placed directly in the mouth |
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|
Term
| Onlays are extracoronal restorations: T or F |
|
Definition
| False; they are intracoronal |
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|
Term
| Intracoronal restorations have what type of retentio? |
|
Definition
| wedge retention;walls are divergent |
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|
Term
| Extracoronal restorations have what type of retention? |
|
Definition
| Sleeve retention; walls are parallel |
|
|
Term
| Restorations that cover and gain retention for the external walls of a tooth preparation are called |
|
Definition
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|
Term
| A crown is type of extracoronal restoration: T ir F |
|
Definition
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|
Term
| A crown veneers the entire tooth: T or F |
|
Definition
| True: crowns are full coverage restorations |
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Term
| Partial veneer crowns cover the facial surface of a tooth: T or F |
|
Definition
| False: Only portions of the clinical crown are veneered; derives itsname from the number of surfaces covered |
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|
Term
| An extremely thin shell of porcelain bonded directly to tooth structure used for esthetic purposes is called a |
|
Definition
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|
Term
| Veneers are bonded to what surface of the tooth? |
|
Definition
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|
Term
| A fixed bridge is also called a fixed partial denture: T or F |
|
Definition
| True: A prosthetic device, definitively attached/cemented to the remaining teeth, roots or implants, which provide the primary support for the restoration and replaces a missing tooth or teeth. |
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Term
| An abutment is an edentulous area serving as an attachment for a fixed or removable partial denture. T or F |
|
Definition
False; an abutment is a tooth serving as an attachment for a fixed or removable partial denture
OR can also be
a component of an implant prosthesis used to attach the restoration to the implant fixture |
|
|
Term
| A pier abutment is an intermediate abutment : T or F |
|
Definition
| True ; it is between abutments |
|
|
Term
| Pier abutments can be used with non-rigid connectors: T or F |
|
Definition
|
|
Term
| The artificial tooth suspended between the abutment teeth is called a |
|
Definition
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|
Term
| Modified ridge lap,ovate, and saddle are all types of what |
|
Definition
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|
Term
| Which type of pontic is recommended today for its natural look and cleansibility? |
|
Definition
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|
Term
| The modified ridge lap pontic is rarely used today since it wraps from the buccal to lingual making it hard to clean. T or F |
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Definition
| False; the saddle is rarely used today;modified ridge lap is also called stein pontic |
|
|
Term
| A modified ridge lap pontic contacts the gingiva on the facial and lingual surfaces.T or F |
|
Definition
| False; only contacts gingiva on the facial surface, the lingual slopes lingual to provide cleansibility |
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|
Term
| The pontic should rest directly on the gingiva to close the interproximal spaces T or F |
|
Definition
| False: pontic should NOT fully contact gingiva and not close interproximal spaces |
|
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Term
| Maryland bridge used in older patients, due to the their larger pulpal chambers T or F |
|
Definition
| False; Maryland bridge used in young patients, due to the their larger pulpal chambers; Preparation: The walls are tapered slightly and the cusp is maintained. The height of contour is maintained circumferentially. The preparation is based on the restorative material. Ex. Porcelain at least 1mm thickness. Metal should be at 0.5mm (less tooth material can be removed-more conservative). If porcelain and metal is used then about 1.5mm is removed. Typically these are placed in the facial. |
|
|
Term
| What is located between the pontic and retainer and can be rigid or non rigid |
|
Definition
|
|
Term
| A solder joint is what type of connector? |
|
Definition
| Rigid; a non-rigid connector is precision attachment or stress breaker |
|
|
Term
| Restorations that are cemented to the prepared abutment tooth is called |
|
Definition
| Retainer; thepontic is connector to the retainer |
|
|
Term
|
Definition
| 2 or more crown restorations / retainers |
|
|
Term
| The number of retainers and pontics together makes up the number of |
|
Definition
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|
Term
| You have a fixed partial denture from tooth #21-#19, replacing tooth #20 .How many units are involved? What teeth are the retainers? Which tooth is the pontic? |
|
Definition
Units= 3
Retainers= tooth #19, tooth #21
Pontic = #20 |
|
|
Term
| The four components of a treatment plan are? |
|
Definition
| intra extra oralexam, med and dental hx, articulated casts, FMX (including pan, PAs, and BWs) |
|
|
Term
| A mechanical device which represents the temporomandibular joints and jaw members to which maxillary and mandibular casts may be attached to simulate jaw movements is called a |
|
Definition
| Articulator; used to evaluate occlusion and occlusal plane |
|
|
Term
| Carbide burs are used during what type of procedures? Operative,perio, fixed |
|
Definition
|
|
Term
| What type of burs are used during fixed preparations? |
|
Definition
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|
Term
| The provisional restoration should be unlike the natural tooth and should impinge on the gingiva T or F |
|
Definition
| False; it should look like the natural tooth and not impinge on the gingiva |
|
|
Term
| On the lingual aspect of a fixed bridge the embrasures are maintained.T or F |
|
Definition
| True; lingual aspect does notcontact the gingiva |
|
|
Term
| A provisional restoration is a permanent restoration.T or F |
|
Definition
| False; a provisional or interim restoration is replaced by a permanent restoration |
|
|
Term
An imprint or negative likeness that is made by placing some soft, semi-fluid material in the mouth, and allowing that material to set
mostly made with an elastic material is a |
|
Definition
|
|
Term
| A custom tray along with PVS are used to take a final impression. T or F |
|
Definition
|
|
Term
| A positive reproduction of the teeth and surrounding structures or positive likeness is called a |
|
Definition
|
|
Term
|
Definition
A model of the individual prepared tooth on which the wax pattern is constructed and margins of the wax pattern and cast restoration are finished
The die is thindividual tooth and it is contained in the working cast |
|
|
Term
| Fabrication of cast restorations involves what steps? |
|
Definition
CONSTRUCTION OF WORKING CASTS
CONSTRUCTION OF A WAX PATTERN
INVESTING AND CASTING
PORCELAIN APPLICATION
FINISHING AND POLISHING
INVESTING AND CASTING |
|
|
Term
| What is placed inside the casting ring? |
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Definition
| The wax pattern is placed inside the casting ring before investing |
|
|
Term
| What is the bisque phase? |
|
Definition
| a series of stages of maturation in the firing of ceramic materials relating to the degree of pyro chemical reaction and sintering shrinkage occurring before vitrification (glazing)–called also biscuit bake |
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|
Term
| A fixed partial denture is a direct restoration. T or F |
|
Definition
| False: THE RESTORATION IS FABRICATED INDIRECTLY IN THE DENTAL LABORATORY AND CEMENTED INTO THE PATIENTS MOUTH |
|
|
Term
| What is a full veneer crown? |
|
Definition
| the restoration covers the entire clinical crown, ie the facial, proximal, lingual, occlusal surfaces |
|
|
Term
| The shape of the finish line of a crown preparation is determined by what? |
|
Definition
| the material used to restore the crown and the bur shape used to prepare the margins |
|
|
Term
| The functional cusp must be beveled? T or F |
|
Definition
|
|
Term
| What is the amount of occlusal reduction needed when fabricating a porcelain fused to metal crown? |
|
Definition
|
|
Term
| what are the three broad principles associated with tooth preparation? |
|
Definition
| biologic, mechanical, esthetic |
|
|
Term
| Retention form, resistance form and deformation are all under what principle of tooth preparation? |
|
Definition
Mechanical: biologic : affect health of oral tissues
esthetic: affect appearance of patient |
|
|
Term
| what are the five principles of tooth preparation? |
|
Definition
| preservation of tooth structure, retention and resistance, structural durability, marginal integrity, preservation of the periodontium |
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|
Term
| Sound tooth structure should be sacrificed to fabricate a PFM? T or F |
|
Definition
| False; you should not sacrifice sound tooth structure. in that case a labial veneer can be made instead of a full veneer crown |
|
|
Term
| During preparation it is extremely important to use plenty of water to prevent too much heat to the tooth. t or f |
|
Definition
|
|
Term
| Resistance and retention of crowns is based on the principle of two opposing vertical surfaces with maximal taper. t or F |
|
Definition
| False; you want minimal taper; no undercuts, converge occlusally ; parallel walls which provide for more retention |
|
|
Term
| Retention prevents removal of a restoration along the path of insertion or the long axis of the preparation. t or f |
|
Definition
| True; vertical ; resistance is to prevent oblique removal |
|
|
Term
| Which provides the best protection against fracture and has the best retention, but can be associated with periodontal problems and poor estehtics?? Crown, onlay, inlay |
|
Definition
| Crown; inlay can cause a wedging effect leading to fracture and onlays have poor retention |
|
|
Term
|
Definition
| The feature of a tooth preparation that resists dislodgement of a crown in a vertical direction or along the path of placement; |
|
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Term
| How can retention form of an excessively tapered preparation be increased? |
|
Definition
| adding grooves or pinholes |
|
|
Term
| the shorter the prep, the less the retention. t or f |
|
Definition
|
|
Term
| 6-16 degrees is the normal range of taper. t or f |
|
Definition
|
|
Term
|
Definition
| its the gradual convergence of the preparation towards the occlusal surface; 6-16 degrees ; if prep too parallel then not good for resistance |
|
|
Term
| Why are prep walls tapered? |
|
Definition
| To visualize the axial walls, to prevent undercuts, to compensate for inaccuracies in the fabrication process, and to prevent more nearly complete seating of the restorations during seating (is too parallel is not good for seating) |
|
|
Term
| the more taper, the less the retention. t or f |
|
Definition
|
|
Term
| What factors must be considered when deciding whether retention is adequate for a given prosthesis? |
|
Definition
| magnitude of dislodging forces, geometry of tooth preparation, roughness of the fitting surface of the restoration , materials being cemented, film thickness of the luting agent |
|
|
Term
|
Definition
| the features of a tooth prep that enhance the stability of a restoration and resist dislodgement along an axis other than the path of placement ; want to resist masticatory forces , prevents dislodgement against forces directed in an apical or oblique direction |
|
|
Term
| What is the new philosophy on taper? |
|
Definition
| taper of 16 degrees is desired; taper as low as 10 degrees on anterior teeth, and as high as 22 degrees on molars |
|
|
Term
| the lesser the surface area, the greater the retention. t or f |
|
Definition
| false; the greater the surface area the greater the retention |
|
|
Term
| what is the old philosophy of taper? |
|
Definition
| 2-5 degrees per wall with a total convergence of 6-10 degrees |
|
|
Term
| what is a path of insertion? |
|
Definition
| an imaginary line along which the restoration will be placed onto or removed from the prep ; grooves and boxes can be used to dictate path of insertion |
|
|
Term
| What is the occlusal reduction for cast metal crowns? |
|
Definition
| 1mm on a non functional cusp and 1.5mm on the functional cusp |
|
|
Term
| What is the occlusal reduction for a PFM crown? |
|
Definition
| 1.5mm on a non functional cusp and 2mm on a functional cusp |
|
|
Term
| The functional cusp on a mandibular tooth is on the buccal or lingual aspect? |
|
Definition
| Buccal; functional cusp for the maxillary arch is on the lingual |
|
|
Term
| What is a functional cusp bevel? |
|
Definition
| a wide bevel on the functional cusp which provides space for adequate bulk of restoring material in areas of heavy occlusal contact ; parallels incline of opposing cusp |
|
|
Term
| The occlusal surface is prepared such that reduction follows the anatomic planes to give uniform thickness in the restoration. t or f |
|
Definition
|
|
Term
| inadequate axial reduction may lead of over contouring or weak restorations with thin walls. t or f |
|
Definition
| true ; must have achieve certain thickness of material circumferentially around tooth |
|
|
Term
| a heavy chamfer finish line is used for a PFM crown prep. t or f |
|
Definition
| False; heavy chamfer is used for cast metal crowns, a radial shoulder is used for a PFM |
|
|
Term
| What is the preferred gingival finish line for a veneer metal restoration? |
|
Definition
| chamfer (use a round end tapered diamond bur) |
|
|
Term
| The guidelines for margin design are? |
|
Definition
| should be conservative, not leave unsupported enamel, easy to read on the tooth, in the impression and on the die (should be continuous all around the tooth), and sufficient space for waxing |
|
|
Term
| Finish lines are chosen based on what? |
|
Definition
| requirements of the types of restorative material |
|
|
Term
| It is best to end the finish line on dentin. t or f |
|
Definition
| False; best to end finish line on enamel, not dentin or cementum |
|
|
Term
| The different types of finish lines are? |
|
Definition
| chamfer, shoulder, shoulder bevel, knife edge |
|
|
Term
| What finish line is used for gold restorations? |
|
Definition
|
|
Term
| what finish line is used with porcelain restorations? |
|
Definition
|
|
Term
| When is a shoulder bevel margin indicated? |
|
Definition
| facial margin on a posterior metal ceramic crown with supragingival margins |
|
|
Term
| What finish line is used on the lingual surface of a metal ceramic crown? |
|
Definition
|
|
Term
| what finish line is used on the facial surface of a metal ceramic crown? |
|
Definition
| shoulder ; this finish line also used with all ceramic crowns |
|
|
Term
| When is a featheredge margin recommended? |
|
Definition
|
|
Term
| When is a chisel edge finish line recommended? |
|
Definition
| occasionally on tilted teeth |
|
|
Term
| A chamfer should not be wider than half the bur used to form it. t or f |
|
Definition
| True ; otherwise a lip of unsupported enamel will be left ; hold bur parallel to long axis of tooth |
|
|
Term
| When is a chamfer finish line indicated? |
|
Definition
| cast gold restorations and the lingual surface of a PFM |
|
|
Term
| Subgingival margins are recommended when possible. t or f |
|
Definition
| False; supra gingival margins are better to promote healthy periodontium |
|
|
Term
| When is subgingival margin placement considered? |
|
Definition
| to improve retention and resistance form on a short prep, trauma/fracture, esthetics |
|
|
Term
| Subgingival margins are usually placed on what teeth to provide for better esthetics? |
|
Definition
|
|
Term
| Subgingival margins may be placed no closer than 2mm to the alveolar crest. t or f |
|
Definition
| True; if disrupt attachment pt will develop perio problems ; if cannot achieve this then crown lengthening procedure may need to be done |
|
|
Term
| the thickness of remaining dentin is directly proportional to the pulpal response. t or f |
|
Definition
| False; it is inversely proportional |
|
|
Term
| Iatrogenic damage to the adjacent tooth during prepping can affect contact and can cause caries. t or f |
|
Definition
| true . use matrix band to prevent this |
|
|
Term
| What is an emergence profile? |
|
Definition
| the contour of a tooth or restoration as it relates to adjacent tissues |
|
|
Term
| What is treatment planning? |
|
Definition
| formulating a logical sequence of treatment designed to restore the patients dentition to good health, with optimal function and appearance |
|
|
Term
A treatment plan includes all of the following except:
-time and cost
-informs patient of future conditions
-extent of proposed dental treatment
-level of home care and professional follow-up
-possible need for alterations |
|
Definition
| Informs patient of CURRENT decisions; tx plan done to patients preferences since most dental disorders can be corrected with different tx options |
|
|
Term
| What are the four treatment plan objectives? |
|
Definition
-correct an existing disease
-prevent future disease
-restore function
-improve appearance |
|
|
Term
| The five elements to a good diagnostic work up are: |
|
Definition
-history
-TMJ/occlusal evaluation
-intraoral exam
-articulated diagnostic casts
-full mouth radiographs |
|
|
Term
| Occusal wear may indicate bruxism. t or f |
|
Definition
|
|
Term
| During the extra oral examination facial symmetry should be evaluated, palpate muscles of head and neck, muscles of mastication, maximum opening, and TMJ joint. t or f |
|
Definition
|
|
Term
| Excessive soft tissue defects are best restored with a removable partial denture rather than a long FPD pontics. t or f |
|
Definition
|
|
Term
During the intraoral examination:
- probing depths should be taken to asses pocket depths,
-any soft tissue lesions must be biopsed
-evaluate oral hygiene / presence of caries,
- evaluate presence and condition of existing restorations
-evaluate interarch space
-evaluate length of edentulous span
. t or f |
|
Definition
|
|
Term
| The diagnostic wax up is important in planning restorations. t or f |
|
Definition
|
|
Term
| Articulate diagnostic casts can be used to evaluate edentulous spaces . t or f |
|
Definition
|
|
Term
Diagnostic casts can be used to evaluate all of the above except:
-edentulous span
-plane of occlusion
-TMJ
-abutment alignment
-occlusal contacs |
|
Definition
| TMJ; also used for RPD design |
|
|
Term
These can be seen on full mouth radiographs:
-root tips
-caries
-level of alveolar bone
-crown to root ratio
-impactions
t or f |
|
Definition
| True: intra osseous lesions, root proximity, radiolucencies and radiopacities can also be seen on FMX |
|
|
Term
| The radiographic examination consists of: |
|
Definition
-evaluation of existing restorations
-recurrent decay
-existing root canal therapies
-root angulation
-root proximity to maxillary sinus
-restoration contours
-location of caries in relation to alveolar bone (indicates restorability or need for crown lengthening) |
|
|
Term
| An acute pulpitis would fall under what treatment sequence? |
|
Definition
|
|
Term
During the treatment of an acute situation, which of the following is true:
-a full examination is necessary
-a full examination is done before the acute situation is treated
-only gather sufficient information to diagnose and treat the condition without delay
-do not relieve symptoms of discomfort |
|
Definition
For an acute dental situation:
-you relieve discomfort from the acute condition
-only gather sufficient info to diagnose and treat condition without delay
-a full exam is not necessary nor possible
- a full exam is done AFTER the acute condition is treated |
|
|
Term
| A cracked or broken porcelain veneer is an example of an acute dental condition. t or f |
|
Definition
| False; Acute dental conditions are: fractured tooth, acute pulpitis, acute exacerbation of chronic pulpitis, dental abscess, acute pericoronitis or gingivitis, myofascial pain dysfunction |
|
|
Term
All are examples of what types of dental conditions:
-lost anterior crown
-fractured porcelain veneer
-fractured removable prosthesis |
|
Definition
| Treatment of NONACUTE problems |
|
|
Term
| Stabilization of detereorating conditions includes: |
|
Definition
| dental caries, periodontal disease |
|
|
Term
| What are the four steps in the treatment sequence: |
|
Definition
1. treatment of acute condition
2. treatment of non acute conditions
3. stabilization of deteriorating conditions
4. definitive therapy |
|
|
Term
| The choice of material and design of restorations is based on what factors? |
|
Definition
-amt of destruction of tooth structure
-esthetics
-plaque control
-financial considerations
-retention |
|
|
Term
| An occlusal adjustment is always necessary before starting any limited treatment. t or f |
|
Definition
| False; an occlusal adjustment (during extensive treatment) may be necessary prior to starting to correct: supraeruption, extrusion, drifting, and preventing a compromised occlusal scheme in a new restoration |
|
|
Term
| Providing the patient is functioning normally, it is acceptable for the restoration to conform to the existing occlusion during limited treatment. t or f |
|
Definition
|
|
Term
| During an extensive treatment plan of fixed prosthodontics if both anteriors and posteriors need to be done which is done first? |
|
Definition
| Anterior restorations are done first to influence the border of movements of the mandible and to provide anterior guidance. |
|
|
Term
| During an extensive treatment plan of fixed prosthodontics if both the maxillary and mandibular posteriors need to be done, how should it be completed? |
|
Definition
| Restore opposing segments: develop efficient occlusal scheme, complete one side then the other |
|
|
Term
| The plane of occlusion must be corrected prior to placing fixed restorations to avoid creating occlusal interferences in your restorations. t or f |
|
Definition
| true ; this may require an enameloplasty with minor correction to a cast restoration with a major discrapancy |
|
|
Term
| A tooth is usually lost to caries or periodontal disease. t or f |
|
Definition
|
|
Term
|
Definition
-drifting
-tilting
-extrusion |
|
|
Term
| If extrusion occurs may need to restore opposing arch , possibly devitalizing the tooth to correct the plane of occlusion. t or f |
|
Definition
|
|
Term
| the dental arch should be a static entity. t or f |
|
Definition
|
|
Term
| What are some prostheses which can be used for tooth replacement? |
|
Definition
removable partial denture (RPD)
tooth supported fixed partial denture (FPD)
implant supported fixed partial denture /single crown
resin-retained tooth supported FPD |
|
|
Term
| A bridge is an example of a tooth supported fixed partial denture. t or f |
|
Definition
|
|
Term
| Removable partial dentures of planned last and done first. t or f |
|
Definition
| False, they are planned FIRST and done last |
|
|
Term
| A RPD design must be completed after restorative/ fixed prosthodontic therapy. t or f |
|
Definition
| False; a RPD design must be completed before any restorative/ fixed prosthodontic therapy so intended restorations can accomodate RPD |
|
|
Term
| Planning a prosthesis with a diagnostic wax up is the key to successful results. t or f |
|
Definition
| true; intended restorations are waxed in on articulated diagnostic casts |
|
|
Term
| A diagnostic wax up is essential for: |
|
Definition
-complex tx plans
-irregular occlusal plane correction
-altering vertical dimension of occlusion
-implant supported prosthesis
-combination of fixed and removable prostheses |
|
|
Term
| If no perceived functional, occlusal, or esthetic impairment is seen in the patient then no prosthetic tx is needed. t or f |
|
Definition
| true; no treatment is needed in long standing edentulous space with little to no drifting or elongation of adjacent or opposing teeth and opposing teeth locked into occlusion may prevent drifting and the edentulous space may be opposed by an edentulous space |
|
|
Term
|
Definition
1. spaces> 2 posterior teeth missing
2. bilateral edentulous spaces with > 2 teeth missing on one side
3. multiple edentulous spaces
4. edentulous space with no distal abutment
5. spaces that include a canine and 2 other contiguous teeth
6. severe loss of tissue |
|
|
Term
| Abutment requirements for RPD abutments are more stringent than requirements for FPD abutments. t or f |
|
Definition
| False ; other indications for RPD: tipped teeth, teeth with short clinical crowns, divergent abutments, periodontally weakened teeth, insufficient numbers of abutments, severe loss of tissue in the edentulous ridge, anterior spans longer than 4 incisors , irregular opposing dentition for occlusion, denttion in transition, and limited finances |
|
|
Term
| In treatment planning for multiple edentulous spaces , a combination of FPD and RPD appliances can be used together. t or f |
|
Definition
| true , can simplify RPD design |
|
|
Term
| What are the indications for fixed partial dentures ? |
|
Definition
-preferred by most patients
-there is an abutment on either side of the edentulous space
-abutment teeth are periodontally sound
-edentulous span is short and straight
-no gross soft tissue defect in the edentulous ridge
-absence of dry mouth
-may require ridge augmentation to improve esthetic result
-when several abutment teeth in one arch require crowns
-if the tooth adjacent to the edentulous space requires a crown, it can function as an abutment for a FPD |
|
|
Term
| How is the decision made as to which treatment plan will be decided upon? |
|
Definition
| two or more treatment options are presented to the patient with advantages and disadvantages of each and the patients wishes are taken into consideration as well (if too risky in your clinical judgement then REFER) |
|
|
Term
| Abutments are evaluated based on? |
|
Definition
-coronal tooth structure
-pulp status
-periodontal support
-crown to root ratio
-root configuration
-periodontal surface area
-abutment inclination |
|
|
Term
| The coronal tooth structure is evaluated cinically, by a radiographic exam and on the mounted diagnostic casts. t or f |
|
Definition
|
|
Term
| A FPD abumtnent should be inflammation free, have adequate attached gingiva, normal probing depth, normal mobility, adequate bone support, and a good crown to root ratio. t or f |
|
Definition
|
|
Term
| What is a crown to root ratio? |
|
Definition
| the length of the tooth occlusal to the alveolar crest of bone compared with the length of the root embedded in bone |
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Term
| What is the optimum crown to root ratio? |
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Definition
| ideal ration is 1:2; realistic optimum is 2:3 |
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Term
| What is the minimally acceptable crown to root ratio? |
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Definition
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Term
| The lever arm decreases as the portion above bone increases. t or f |
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Definition
| False; lever arm increases as the portion above bone increases |
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Term
| Teeth with doubtful periodontal healthy should be endodontically treated. t or f |
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Definition
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Term
| in regards to root configuration, it is better to have fused roots than widely separated roots in multi rooted teeth. t or f |
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Definition
| False; widely separated roots are better than fused roots |
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Term
| It is better for a root to be conical than broader labio-lingually than mesio-distally. t or f |
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Definition
| false; better to be broader labio-lingual than mesio-distally vs. conical |
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Term
| A bulbous or apically curved root is better than a tapered one. t or f |
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Definition
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Term
| Multi rooted teeth are better abutments than single teeth with conical roots. t or f |
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Definition
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Term
| Its better for a root to be irregularly shaped than have perfect taper. t or f |
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Definition
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Term
| A long root is better than a short root. t or f |
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Definition
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Term
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Definition
| The root (periodontal) surface area of the abutment teeth should equal or surpass that of the teeth being replaced by the pontics |
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Term
| What are Jepson's tables? |
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Definition
| represents the various surface areas of different teeth and the ratios bw them ..?? |
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Term
| root surface area= periodontal ligament attachment. t or f |
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Definition
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Term
| larger teeth have greater surface area. t or f |
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Definition
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Term
| When can teeth with a greater than 1:1 ratio be adequate? |
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Definition
| when occlusion is opposing artificial teeth . there will be less forces on the opposing FPD and less stress on abutment teeth |
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Term
| what are the occlusal forces on normal dentition? |
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Definition
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Term
| what are the occlusal forces on FPDs? |
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Definition
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Term
| what are the occlusal forces on RPD.s |
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Definition
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Term
| Endodontically treated abutments must: |
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Definition
1. have adequate apical seal
2. can serve well with post and core foundation restoration for strength and retention
3. failures mostly occur on teeth with short roots and little remaining tooth structure
4. if too badly broken better to extract |
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Term
| Which are considered conservative FPD abutments? |
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Definition
| resin retained fixed partial dentures and implant supported prosthesis |
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