Relining of complete dentures

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Relining of complete dentures

  1. 1. Relining of Complete Dentures<br />Done by Ahmed Al-Asmari<br />
  2. 2. Definition : <br />Resurfacing or correction of denture adaptation to underlying tissues by the addition of a new base material to its fitting surface without changing its occlusal relation.<br />
  3. 3. Reline Indications<br />Loss of retention<br />Instability<br />Food under denture<br />Abused mucosa<br />
  4. 4. General Considerations<br />Optimal tissue health<br />Reasonable CR/CO<br />Adequate vertical dimension<br />Adequate peripheral extensions<br />
  5. 5. Procedures:<br />Patient is instructed to leave his denture out of his mouth at least 48 hrs to allow for recovery of tissues and reduce irritation caused by ill-fitted denture.<br />
  6. 6. Denture preparation:<br /><ul><li>Any undercuts are removed from the denture base.
  7. 7. Peripheral extensions are checked and adjusted.
  8. 8. Borders are reduced and squared to provide a definite edge for addition of new base material.</li></li></ul><li>Cont... <br /><ul><li>A hole is made in the palatal surface to allow escape of excess impression material. Slight reduction in the fitting surface may be done to create some space for the impression material.
  9. 9. Border tracing & new impressions are made under centric occlusion to maintain occlusal relationship.
  10. 10. The denture with impression material is boxed and poured into stone.</li></li></ul><li>
  11. 11. Cont ...<br />The denture is flasked, and the old resin material is thoroughly cleaned and roughened.<br />
  12. 12. New acrylic resin material is packed, and the denture is cured in pressure curing unit containing water at 45°c for 20 min. to prevent porosity of new resin materialand warpage of the old resin material (release of internal stresses).<br />Finishing and polishing is done in the usual manner.<br />
  13. 13. Diagnosis-Occlusal disharmony<br />Loss of stability and retention<br />Irritation and inflammation on one side<br />Teeth stained on one side<br />
  14. 14. Reline Contraindications: <br />Worn out dentures.<br />Vertical dimension loss greater than 7 mm.<br />Significant mucosal inflammation.<br />Poor denture esthetics.<br />Denture related speech problems.<br />Severe tooth wear.<br />Severe vertical overlap with tooth wear (posterior tooth concept).<br />Severe occlusalwear.<br />
  15. 15. Reference : <br />Principles of complete denture prosthodontics, by hassablla , 2nd edition p.233-235<br />

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