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Assessment of various factors for feasibility of fixed cantilever bridge: a review study.

Sharma A, Rahul GR, Poduval ST, Shetty K - ISRN Dent (2012)

Bottom Line: When the cantilevered pontic is placed under occlusal function, forces are placed on the abutments.There are various criteria and factors necessary for a successful cantilever fixed partial denture (FPD).The purpose of this paper is to discuss briefly various factors involved in the planning of a cantilever fixed partial denture.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Bangalore Institute of Dental Sciences and Research Center, 5/3 Hosur Main Road, Oppasite Lakkasandra Bus Stop, Wilson Garden, Bangalore 560027, India.

ABSTRACT
Cantilever fixed partial dentures are defined as having one or more abutments at one end of the prosthesis while the other end is unsupported. Much controversy without documentary evidence has surrounded this prosthesis. Despite negative arguments, the cantilever prosthesis has been used extensively by the clinicians. If used nonjudiciously without following proper guidelines these might lead to some complications. Although complications may be an indication that clinical failure has occurred, this is not typically the case. It is also possible that complications may reflect substandard care. Apart from the substandard care, the unique arrangement of the abutments and pontic also accounts for the prime disadvantage: the creation of a class I lever system. When the cantilevered pontic is placed under occlusal function, forces are placed on the abutments. There are various criteria and factors necessary for a successful cantilever fixed partial denture (FPD). The purpose of this paper is to discuss briefly various factors involved in the planning of a cantilever fixed partial denture.

No MeSH data available.


Related in: MedlinePlus

The load directed downward on the free end pontic causes the rectangle (dotted line) to rotate on an axis shown in the diagram. This demonstrates the compressive and tensile effects and the need for strong cements and strong soldered joints as well as strong metal for castings.
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Related In: Results  -  Collection


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fig7: The load directed downward on the free end pontic causes the rectangle (dotted line) to rotate on an axis shown in the diagram. This demonstrates the compressive and tensile effects and the need for strong cements and strong soldered joints as well as strong metal for castings.

Mentions: The greatest dislodging forces arc met in the abutment tooth farthest from the free-end pontic. If the forces which tend to rotate the prosthesis occur around the axis of rotation in the sagittal plane, which is in or close to the abutment tooth adjoining the free-end pontic, it is not difficult to understand that the forces tending to lift the cast crown from the abutment farthest from the free-end pontic are greatest. At the clinical level, this means that the cement should be strongest where the forces of compression and distension are greatest and, also, that the metal should be strongest over these abutment teeth [1]. The maximal strength of most luting cements is compressive, the minimal strength is tensile, and the shear strength has an interval value. Apically directed forces on the cantilever direct tensile forces to the cement of the retainer farthest from the cantilever [6] (Figures 6 and 7).


Assessment of various factors for feasibility of fixed cantilever bridge: a review study.

Sharma A, Rahul GR, Poduval ST, Shetty K - ISRN Dent (2012)

The load directed downward on the free end pontic causes the rectangle (dotted line) to rotate on an axis shown in the diagram. This demonstrates the compressive and tensile effects and the need for strong cements and strong soldered joints as well as strong metal for castings.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3313584&req=5

fig7: The load directed downward on the free end pontic causes the rectangle (dotted line) to rotate on an axis shown in the diagram. This demonstrates the compressive and tensile effects and the need for strong cements and strong soldered joints as well as strong metal for castings.
Mentions: The greatest dislodging forces arc met in the abutment tooth farthest from the free-end pontic. If the forces which tend to rotate the prosthesis occur around the axis of rotation in the sagittal plane, which is in or close to the abutment tooth adjoining the free-end pontic, it is not difficult to understand that the forces tending to lift the cast crown from the abutment farthest from the free-end pontic are greatest. At the clinical level, this means that the cement should be strongest where the forces of compression and distension are greatest and, also, that the metal should be strongest over these abutment teeth [1]. The maximal strength of most luting cements is compressive, the minimal strength is tensile, and the shear strength has an interval value. Apically directed forces on the cantilever direct tensile forces to the cement of the retainer farthest from the cantilever [6] (Figures 6 and 7).

Bottom Line: When the cantilevered pontic is placed under occlusal function, forces are placed on the abutments.There are various criteria and factors necessary for a successful cantilever fixed partial denture (FPD).The purpose of this paper is to discuss briefly various factors involved in the planning of a cantilever fixed partial denture.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Bangalore Institute of Dental Sciences and Research Center, 5/3 Hosur Main Road, Oppasite Lakkasandra Bus Stop, Wilson Garden, Bangalore 560027, India.

ABSTRACT
Cantilever fixed partial dentures are defined as having one or more abutments at one end of the prosthesis while the other end is unsupported. Much controversy without documentary evidence has surrounded this prosthesis. Despite negative arguments, the cantilever prosthesis has been used extensively by the clinicians. If used nonjudiciously without following proper guidelines these might lead to some complications. Although complications may be an indication that clinical failure has occurred, this is not typically the case. It is also possible that complications may reflect substandard care. Apart from the substandard care, the unique arrangement of the abutments and pontic also accounts for the prime disadvantage: the creation of a class I lever system. When the cantilevered pontic is placed under occlusal function, forces are placed on the abutments. There are various criteria and factors necessary for a successful cantilever fixed partial denture (FPD). The purpose of this paper is to discuss briefly various factors involved in the planning of a cantilever fixed partial denture.

No MeSH data available.


Related in: MedlinePlus