Denture Repair

Uses. Dental solders and fluxes are used to join orthodontic wires, fasten attachments to partial dentures, repair castings units, and join crown and bridge units either before or after the appHcation of porcelain. They may also be used to repair fixed and removable dental appHances. 

Denture Repair Resins. Fractured dentures are readily repaired with materials similar to the RT- or cold-cured denture resins. Repairs are achieved with little to no dimensional change. However, the strength of the repaired denture may be substantially less than the original prosthesis (25). ANSI/ADA Specification No. 13 (1999) sets the requirements for cold-cured repair resins. 

Self-curing methyl methacrylate polymer-monomer mixtures are employed for denture repair and for relining dentures that have become ill fitting. Many attempts at soft relines have been made by plasticizing methyl methacrylate polymers and attaching to the denture base. None of these has been successful and a real need... 

Sticky waxes are used as thermoplastic cements. The broken pieces of a plaster impression are reassembled and held in position with sticky wax. Broken denture bases may be held in proper alignment for repair. Orthodontic apphances may be assembled with a sticky wax prior to investing and soldering. Plaster splints may be sealed to stone models in the production of porcelain or resin facings. Thus, sticky wax is useflil in almost any operation where it is desired to position and hold several small pieces in a temporary relationship. 

Special-Purpose Resins, Repair Resins. Fractured acryflc dentures can be repaired with materials similar in composition to cold-cured denture resins. These materials generally cure more rapidly because of the relative simple manipulations involved. The process is quick and there is fltde dimensional change, but the strength of the repaired denture may be only half that of the original appliance (213). Test methods and requirements of these materials are given in ANSI/ADA specification no. 13 for denture cold-curing repair resins. 

The largest volume of plastics for dental applications is consumed in the construction and repair of dentures. Other uses include artificial teeth, restoratives—especially for anterior... 

Considerable activity is underway to develop nontoxic activator and accelerator systems for these room temperature curing reactive adhesives. It is of interest to note that progress in analogous systems has been made in dental research - in work on acrylic adhesives for repair and for acrylic dentures. In one of several papers ( ), workers describe compositions of complex, exotic acrylic monomers cured with standard and modified Schiff s bases and with complex aromatic amines. 

Anhstrom G, Erixon K (1981) Measurement of strand breaks by alkaline denturation and hydroxyapatite chromatography. In Friedberg EC, Hanawalt PC (eds) DNA repair. A laboratory manual of research procedures, vol 1, part B. Marcel Dekker, New York Basel, pp403-418... 

Thus, recording injuries and illnesses is limited to disorders and abnormal conditions related to a person. Damage to artificial or mechanical devices, such as dentures, eye glasses, canes, or prosthetic arms or legs, would not be considered an injury or illness under Part 1904. Even if the employee is unable to work or must be placed on restricted duty until the prosthetic device is repaired or replaced, the case is not recordable. 

Ceramics for Replacement and Repair Ceramics are used as implants, for repairs and restorations in the human body. Hydroxyapatite-based compositions stimulate bone and tissue growth. Other ceramics that could be used for replacement and repair are alumina and zirconia. Teeth replacement has been the earliest use of ceramics in the human body. Prior to 1774, teeth of animals and those extracted from human donors were used, along with other materials such as ivory, bone, and wood. In 1774, porcelain was used. In recent years, ceramics have become the standard materials for tooth replacement, dentures, and restoration techniques. A composite of ceramic particles in a polymer is used to fill cavities. Jawbones are restored by hydroxyapatite. 

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