RELINING OF COMPLETE DENTURES

Done by Ahmed Al-Asmari

Definition :

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.

Reline Indications

Loss of retention

Instability

Food under denture

Abused mucosa

General Considerations

Optimal tissue health

Reasonable CR/CO

Adequate vertical dimension

Adequate peripheral

extensions

Procedures:

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.

Denture preparation:

• Any undercuts are removed from the denture base.

• Peripheral extensions are checked and adjusted.

• Borders are reduced and squared to provide a definite edge for addition of new base material.

Cont ...• 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.

• Border tracing & new impressions are made under centric occlusion to maintain occlusal relationship.

• The denture with impression material is boxed and poured into stone.

Cont... The denture is flasked, and the

old resin material is thoroughly cleaned and roughened.

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 material and warpage of the old resin material (release of internal stresses).

Finishing and polishing is done in the usual manner.

Diagnosis-Occlusal disharmony

1. Loss of stability and retention2. Irritation and inflammation on

one side3. Teeth stained on one side

Reline Contraindications :

1. Worn out dentures.2. Vertical dimension loss greater than 7

mm.3. Significant mucosal inflammation.4. Poor denture esthetics.5. Denture related speech problems.6. Severe tooth wear.7. Severe vertical overlap with tooth wear

(posterior tooth concept).8. Severe occlusal wear.

Reference :

Principles of complete denture prosthodontics, by hassablla , 2nd edition p.233-235