The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

Igor J Pesun - One of the best experts on this subject based on the ideXlab platform.

  • intrusion of teeth in the combination implant to natural tooth Fixed Partial Denture a review of the theories
    Journal of Prosthodontics, 1997
    Co-Authors: Igor J Pesun
    Abstract:

    This article reviews the literature dealing with the combination implant-to-natural-tooth-supported Fixed Partial Denture. The restoration of masticatory function with a combination implant-to-natural-tooth Fixed Partial Denture is associated with a variety of undesirable clinical sequelae, including the breakage of implant components, damage to the abutment teeth, or intrusion of the abutment teeth. Theories regarding intrusion of abutment teeth combined with implants for Fixed Partial Dentures are only speculative. Several theories are presented to explain the intrusion of natural teeth in association with implant-to-natural-tooth Fixed Partial Dentures. One of the first theories was based on the idea that a lack of normal stimulation of the periodontal ligament produces atrophy of the periodontal ligament and intrusion of the tooth. The remaining theories relate to excessive forces being placed on the natural tooth, resulting in movement of the tooth to a less stressful position. These forces are placed on the tooth by differential energy dissipation, mandibular flexion and torsion, flexion of the Fixed Partial Denture framework, impaired rebound memory, debris impaction or microjamming, or ratchet effect related to the use of precision attachments. Based a review of the literature, a philosophy for treating combination implant-to-natural-tooth restorations is presented.

  • Intrusion Of Teeth In The Combination Implant‐to‐Natural‐Tooth Fixed Partial Denture: A Review of the Theories
    Journal of Prosthodontics, 1997
    Co-Authors: Igor J Pesun
    Abstract:

    This article reviews the literature dealing with the combination implant-to-natural-tooth-supported Fixed Partial Denture. The restoration of masticatory function with a combination implant-to-natural-tooth Fixed Partial Denture is associated with a variety of undesirable clinical sequelae, including the breakage of implant components, damage to the abutment teeth, or intrusion of the abutment teeth. Theories regarding intrusion of abutment teeth combined with implants for Fixed Partial Dentures are only speculative. Several theories are presented to explain the intrusion of natural teeth in association with implant-to-natural-tooth Fixed Partial Dentures. One of the first theories was based on the idea that a lack of normal stimulation of the periodontal ligament produces atrophy of the periodontal ligament and intrusion of the tooth. The remaining theories relate to excessive forces being placed on the natural tooth, resulting in movement of the tooth to a less stressful position. These forces are placed on the tooth by differential energy dissipation, mandibular flexion and torsion, flexion of the Fixed Partial Denture framework, impaired rebound memory, debris impaction or microjamming, or ratchet effect related to the use of precision attachments. Based a review of the literature, a philosophy for treating combination implant-to-natural-tooth restorations is presented.

Pekka K Vallittu - One of the best experts on this subject based on the ideXlab platform.

  • release of chlorhexidine digluconate and flexural properties of glass fibre reinforced provisional Fixed Partial Denture polymer
    Journal of Materials Science: Materials in Medicine, 2004
    Co-Authors: Milla S Lahdenpera, Mervi Puska, Pasi Alander, Tuomas Waltimo, Pekka K Vallittu
    Abstract:

    The objective of this study was to determine the flexural properties and the release of chlorhexidine digluconate (CHX) of CHX laced unidirectional E-glass fibre reinforced provisional Fixed Partial Denture polymer. Bar shaped test specimens (3.3 × 10.0 × 65.0 mm) were fabricated from provisional Fixed Partial Denture polymer (mixture of poly[ethylmethacrylate] powder and n-poly[butyl methacrylate] monomer liquid) with E-glass fibre reinforcements. Poly(methyl methacrylate) preimpregnated continuous unidirectional glass fibre reinforcement was laced with CHX. The glass fibre reinforcements were incorporated into the polymer and the polymerised to the form of test specimens. In addition test specimens without CHX in glass fibre reinforcement were made for comparison. Control specimens did not contain glass fibres in the test specimens. Flexural strength and modulus of test specimens (n = 6) was tested with three-point bending test after storing the specimens dry or in water (two weeks). Released CHX was determined with high performance liquid chromatography during 180 days water immersion. In dry conditions, the flexural strength and the modulus of the polymer was 43 MPa and 1.7 GPa, and with glass fibre reinforcement 96 MPa and 3.5 GPa. With the reinforcement laced with CHX, the strength was 92 MPa and the modulus was 3.2 GPa. The water storage of test specimens did not weaken the reinforced polymer. The majority of the CHX released from the glass fibre reinforced polymer during the first days of storage in water. Flexural properties of provisional Fixed Partial Denture polymer were increased using glass fibre reinforcement. The fibre reinforcement that was laced with CHX resulted in similar reinforcing effect.

  • the effect of glass fiber reinforcement on the fracture resistance of a provisional Fixed Partial Denture
    Journal of Prosthetic Dentistry, 1998
    Co-Authors: Pekka K Vallittu
    Abstract:

    Abstract Purpose . This study determined the load required to fracture a three-unit provisional Fixed Partial Denture restoration, which had been reinforced with an experimental glass fiber reinforcement. Material and methods . Provisional Fixed Partial Dentures ( n = 5) were fabricated from a resin of polyethyl methacrylate powder and n-butylmethacrylate liquid. The Fixed Partial Dentures in the control group were unreinforced. In the other groups, the Fixed Partial Dentures were reinforced either with one, two, or three unidirectional glass fiber reinforcements and one glass fiber weave reinforcement. The load was applied to the Fixed Partial Dentures by a steel ball placed in the cavity in the middle fossa of the pontic tooth. A longitudinal section of the Fixed Partial Denture was made to determine the position of the reinforcements. Means were compared by analysis of variance. Results . The load required to fracture the unreinforced Fixed Partial Denture was 614 N, while incorporation of one unidirectional reinforcement increased the load to 660 N, two reinforcements to 818 N, three reinforcements to 827 N, and three reinforcements with one weave reinforcement to 973 N. It was found that the unidirectional reinforcements were positioned on the side of the occlusal surface of the Fixed Partial Denture, namely, the side of compression during loading. Conclusion . The results suggest that, even though the glass fiber reinforcements were positioned on the least favorable side of the Fixed Partial Denture in terms of the physical properties of the materials, these reinforcements considerably increased the fracture resistance of the provisional Fixed Partial Denture. (J Prosthet Dent 1998;79:125-30.)

Filiz Aykent - One of the best experts on this subject based on the ideXlab platform.

Haluk Baris Kara - One of the best experts on this subject based on the ideXlab platform.

Leonard Marotta - One of the best experts on this subject based on the ideXlab platform.

  • A multifunctional, provisional, implant-retained Fixed Partial Denture
    Journal of Prosthetic Dentistry, 2001
    Co-Authors: Francis F. Tung, Allyn J. Coleman, Tai Nien Lu, Leonard Marotta
    Abstract:

    This article describes the modification of a procedure for fabricating a laboratory-processed, metal-reinforced, acrylic resin provisional restoration that becomes an implant-retained Fixed Partial Denture. The modification involves the incorporation of patrix and matrix components into a cast metal framework. The prosthesis can be used as an alternative to a removable radiologic stent and surgical guide. It can function as a surgical guide during implant placement and help retract the buccal mucogingival flap during implant placement. The prosthesis also can be used as an aid in locating the implant during stage II surgery. Finally, the pontics can be converted into an implant-supported provisional restoration immediately after the implant prosthetic components are attached to the uncovered implants.

  • A multifunctional, provisional, implant-retained Fixed Partial Denture
    Journal of Prosthetic Dentistry, 2001
    Co-Authors: Francis Tung, Allyn J. Coleman, Tai Nien Lu, Leonard Marotta
    Abstract:

    Abstract This article describes the modification of a procedure for fabricating a laboratory-processed, metal-reinforced, acrylic resin provisional restoration that becomes an implant-retained Fixed Partial Denture. The modification involves the incorporation of patrix and matrix components into a cast metal framework. The prosthesis can be used as an alternative to a removable radiologic stent and surgical guide. It can function as a surgical guide during implant placement and help retract the buccal mucogingival flap during implant placement. The prosthesis also can be used as an aid in locating the implant during stage II surgery. Finally, the pontics can be converted into an implant-supported provisional restoration immediately after the implant prosthetic components are attached to the uncovered implants. (J Prosthet Dent 2001;85:34-9.)