2.0 Single Tooth Restoration

Question 1

Whether full crown or amalgam/composite is done, the design and material selection of the restoration is based on these factors: (5)

Answer 1

1. Destruction of tooth structure
2. Esthetics
3. Plaque control
4. Financial considerations
5. Retention

Question 2

The __________ is inserted as a soft mass into the cavity preparation, where it will harden and be retained by mechanical undercuts or adhesion. The ______, made of cast metal, metal-ceramic, or all-ceramic material, is fabricated outside of the operatory and is luted or bonded to the patient’s tooth at a subsequent appointment.

Answer 2

plastic restoration
cemented restoration

Question 3

What teeth concerns retention the most?

Answer 3

short teeth and removable partial denture abutments.

Question 4

INTRACORONAL RESTORATIONS (7)

Answer 4

(1) glass ionomer,
(2) composite resin,
(3) simple amalgam,
(4) complex amalgam,
(5) metal inlay,
(6) ceramic inlay,
(7) mesio-occlusodistal onlay.

Question 5

• Small lesions
• Class V lesions caused by erosion or abrasion
• incipient lesions on the proximal surfaces of posterior teeth by use of a so-called tunnel preparation, which leaves the marginal ridge intact.
• has found a niche in the restoration of root caries in geriatric and periodontal patients
• an interim treatment restoration to assist in the control of rampant caries. This is further enhanced by the release of fluoride by the material.

Answer 5

GLASS IONOMER (GI)

Question 6

Used as liner for deep caries before composite restorations

Answer 6

GLASS IONOMER (GI)

Question 7

• can be used for minor to moderate lesions in esthetically critical areas.
• commonly used to restore Class III and Class V lesions on anterior teeth.
• Indirect inlays of this can be used for proximo-occlusal restorations on posterior teeth.
• are available in different shades to match natural teeth

Answer 7

COMPOSITE RESIN

Question 8

• without pins or other means of auxiliary retention, for decades has been the standard one- to three-surface restoration for minor- to moderate-sized lesions in esthetically noncritical areas
• best used where more than half of the coronal dentin is intact.
• “extension for prevention”

Answer 8

SIMPLE AMALGAM

Question 9

• augmented by pins or other auxiliary means of retention can be used to restore teeth with moderate to severe lesions in which less than half of the coronal dentin remains.
• used in the restoration of teeth with missing cusps or endodontically treated premolars and molars

Answer 9

COMPLEX AMALGAM

Question 10

• Teeth with low esthetic requirements and small- to moderate sized lesions can be restored with this restorations.
• The preparation isthmus should be narrow to minimize stress in the surrounding tooth structure.
• NOT recommended for incipient lesions.

Answer 10

METAL INLAY

Question 11

• used to restore teeth with small to moderate-sized lesions that permit a narrow preparation isthmus in an area of the mouth where the esthetic demand is high.
• Premolars should have one intact marginal ridge, but MOD ceramic inlays can be used in molars.
• The relatively large size of the cavity preparation required for this restoration precludes its use in the treatment of incipient lesions.

Answer 11

CERAMIC INLAY

Question 12

• used for restoring moderately large lesions on premolars and molars with intact facial and lingual surfaces. It will accommodate a wide isthmus and up to one missing cusp on a molar.
• This restoration also can be considered an extracoronal restoration because of the occlusal coverage and protects the tooth cusps.
• does NOT have the necessary resistance to be used as a fixed partial denture retainer. Although ordinarily fabricated of a gold alloy, this restoration design has been used with cast glass and other types of ceramics.

Answer 12

ONLAY (MESIO-OCCLUSODISTAL ONLAY)

Question 13

If insufficient coronal tooth structure exists to retain the restoration within the crown of the tooth, a crown, is needed.

Answer 13

EXTRACORONAL RESTORATIONS

Question 14

In this circumstance, the crown of the tooth and the restoration itself are dependent on the strength of the remaining tooth structure to provide structural integrity.

Answer 14

INTRACORONAL RESTORATIONS

Question 15

EXTRACORONAL RESTORATIONS (5)

Answer 15

(1) partial coverage crown,
(2) all-metal crown,
(3) metal-ceramic crown,
(4) all-ceramic crown,
(5) ceramic veneer.

Question 16

• This is a crown that leaves one or more axial surfaces uncovered. Therefore, it can be used to restore a tooth with one or more intact axial surfaces with half or more of the coronal tooth structure remaining.
• It will provide moderate retention and can be used as a retainer for short-span fixed partial dentures. If tooth destruction is not excessive, this with a minimally extended preparation and carefully finished margins can satisfy moderate esthetic demands in the maxillary arch.

Answer 16

PARTIAL VENEER CROWN

Question 17

• can be used to restore teeth with multiple defective axial surfaces.
• It will provide the maximum retention possible in any given situation, but its use must be restricted to situations where there are no esthetic expectations.
• This will usually limit it to second molars, some mandibular first molars, and occasionally mandibular second premolars. Because less tooth structure must be removed for its preparation than for crowns with a ceramic component, and because its fabrication is the simplest of any crown, this restoration should remain among those designs considered in planning single-tooth restorations on molars as well as posterior fixed partial dentures.

Answer 17

FULL METAL CROWN

Question 18

it can also be used to restore teeth with multiple defective axial surfaces. It, too, is capable of providing maximum retention, but it also will meet high esthetic requirements. It can be used as a fixed partial denture retainer where full coverage and a good cosmetic result must be combined.

Answer 18

METAL-CERAMIC CROWN

Question 19

• When full coverage and maximum esthetics must be combined, it is the treatment of choice.
• All-ceramic crowns are not as resistant to fracture as metal-ceramic crowns, so their use must be restricted to situations likely to produce low to moderate stress. They are usually used for incisors, although they are also employed in the restoration of posterior teeth.
• Preparations for this type of restoration on premolars and molars require the removal of large quantities of tooth structure.

Answer 19

ALL CERAMIC CROWN

Question 20

• emerged as a means of producing an esthetic result on otherwise intact anterior teeth that are marred by severe staining or developmental defects restricted to the facial surface of the tooth.
• This restoration also can be used to restore moderate incisal chipping and small proximal lesions. The use of a veneer requires only minimal tooth preparation and therefore offers an alternative to crowns that is attractive to the patient and dentist alike.

Answer 20

CERAMIC VENEER (LAMINATES)