REPAIR RELINING AND REBASING`

Repair

Causes of fracture

Excessive pressure during cleaning.

Accidents such as dropping the denture

Full dentures with a cobalt chromium lingual strengthener

Repair of complete fracture

1-The broken edges of the denture are cleaned.

2-The parts of the broken denture reassembled and fixed together.

3-Plaster is vibrated onto denture.

4-Sticky wax removed.

5-The resin on both sides of the break is cut away (2-3 mm)

Repairs using cold-curing resinDough method

Sprinkle on

method

Relining and Rebasing

Relining

It is refitting the denture by adding a small amount of the denture base material to the fitting surface.

Rebasing

It is refitting the denture by replacing the denture base material without changing the occlusal relation of the denture.

Indications

1 -For ill fitting dentures to improve retention and stability of the denture.

2 -When there is decreased vertical dimension of occlusion.

3 -Rebasing is indicated when the denture base is discolored.

Technique of rebasing and relining

An impression with zinc oxide paste inside the denture is necessary. The patient should bite with both denture during making an impression.

The impression is poured into dental stone, then flasked without separation.

For relining the impression material is replaced by acrylic resin.

For rebasing the denture base and impression material is replaced with acrylic.

Duplication of complete denture

Indication

Duplication is indicated when the old denture in good condition and the patient is accustomed to it and a spare one is required

Elastic mold

The denture is flasked in elastic impression material e.g. alginate and silicone to make elastic mold. This elastic material facilitate removal of the denture.

The denture removed and new teeth placed in position and acrylic resin is packed into the mold.

.

ReferencesReferences11--Allen AA, Heath JR, Mc Cord: Allen AA, Heath JR, Mc Cord: Complete Prosthodontics; Complete Prosthodontics; Problems, Diagnosis and Management. Mosby-Wolf, London, 1995 Problems, Diagnosis and Management. Mosby-Wolf, London, 1995..

22 - -Beresin, V.E. and Schiesser, F. J.: The neutral zone in complete and partial dentures. 2nd ed. St. Louis, The C.V. Mosby Company: 1978Beresin, V.E. and Schiesser, F. J.: The neutral zone in complete and partial dentures. 2nd ed. St. Louis, The C.V. Mosby Company: 1978..33 - -Coleman, R. D. and kaiser, W. B.: The Scientific Bases of Dentistry. Philadelphia, W. B. Sounders; 1966Coleman, R. D. and kaiser, W. B.: The Scientific Bases of Dentistry. Philadelphia, W. B. Sounders; 1966 . .

44 - -Craig, R.G.: Restorative Dental Materials. 8Craig, R.G.: Restorative Dental Materials. 8thth ed. St. Louis, C. V. Mosby Company ed. St. Louis, C. V. Mosby Company..55--Fenn, H.R.B.; Liddelow, K.P. and Gemson, A.B.: Clinical Dental Prosthetics. 2 ed. London, Staples; 1974Fenn, H.R.B.; Liddelow, K.P. and Gemson, A.B.: Clinical Dental Prosthetics. 2 ed. London, Staples; 1974..

66 - -Geering AH,Kundert M , Kelesy C: Complete denture and overdenture Prosthetics. Theme medical publication Inc. New York, Geering AH,Kundert M , Kelesy C: Complete denture and overdenture Prosthetics. Theme medical publication Inc. New York, 19931993..

77--Grant AR, Heath JR, Mc Cord JF: Complete Prosthodontics; Problems, Diagnosis and Management. Mosby-Wolf, London, 1996Grant AR, Heath JR, Mc Cord JF: Complete Prosthodontics; Problems, Diagnosis and Management. Mosby-Wolf, London, 1996..

88 - -Heartwell, C.M. and Rhan, A.G.:Heartwell, C.M. and Rhan, A.G.: Syllabus of Complete Dentures. 3 Syllabus of Complete Dentures. 3rdrd ed. Philadelphia, Lea and ed. Philadelphia, Lea and

Febiger; 1986Febiger; 1986..99 - -Sharry, J.J.:Sharry, J.J.: Complete denture prosthodontics. 3 Complete denture prosthodontics. 3rdrd ed. ed. NewYork, McGraw-Hill; 1974NewYork, McGraw-Hill; 1974..

1010 - -SowterSowter,, J.B.: J.B.: Dental labo Dental laboratory technology: prosthodontic techniques. Chapel Hill, University of Northratory technology: prosthodontic techniques. Chapel Hill, University of North Carolina; 1968Carolina; 1968..

1111--Watt, D.M. andWatt, D.M. and Mac Gregor, A.R.: Mac Gregor, A.R.: Designing complete dentures. Philadelphia, W.B. Sounders; 1976 Designing complete dentures. Philadelphia, W.B. Sounders; 1976..1212 - -Winkler,Winkler, S.: Essential of complete Denture Prosthodontics. 2 S.: Essential of complete Denture Prosthodontics. 2ndnd ed. PSG Publishing Company; ed. PSG Publishing Company;

19881988..1313 - -Zarb, G.A.; Bolender, C.L.; HicKey, J.C. and carlesson, G.E.:Zarb, G.A.; Bolender, C.L.; HicKey, J.C. and carlesson, G.E.: Boucher's Prothodontic Boucher's Prothodontic

Treatment for Edentulous Patients. 7Treatment for Edentulous Patients. 7 th.th. Ed. St-Louis, The C.V.Mosby Ed. St-Louis, The C.V.Mosby Company; 1990Company; 1990..N, B. All pictures in these slides are copied from the above references and from the internetN, B. All pictures in these slides are copied from the above references and from the internet..