TOPIC: RELINING AND REBASING
🎯 KEY POINTS:
🔹 Tissue Conditioners are used in functional reline technique.
🔹 The major drawback of rebasing complete dentures is chances of alteration in the centric relation.
🔎 DEFINITIONS:
🔸Relining: The procedures used to resurface the tissue side of a removable dental prosthesis with new base material, thus producing an accurate adaptation to the denture foundation. (GPT 8th Ed)
🔸Rebasing: The laboratory process of replacing the entire denture base material on an existing prosthesis. (GPT 8th Ed)
🔎 INDICATIONS FOR RELINING OR REBASING
🔸Immediate dentures which were made 3–6 months before
🔸Poor fit of the denture base to the ridges because of resorption
🔸The patient cannot afford remaking of the dentures
🔸When mental or physical health of the patient does not permit fabrication of new dentures
💠CONTRAINDICATIONS
🔸If ridges are excessively resorbed
🔸If the soft tissues are highly abused
🔸Patients with temporomandibular joint problems
🔸Major alteration in speech
🔸Poor aesthetics
🔸Severe bony undercuts
🔸Unsatisfactory jaw relationship
💠ADVANTAGES
🔸Reduced patient visits
🔸Economical for patient
🔸Fit of the prosthesis is improved
🔸Soft liner can be used, if needed
💠DISADVANTAGES
🔸Not used in case of excessive resorption
🔸Chances of altered jaw relationship during the process
🔸Cannot correct occlusal arrangement
🔸Cannot alter aesthetics or jaw relations
🔎 RATIONALE FOR RELINING COMPLETE DENTURES
🔹To re-establish the correct relation of the denture to the basal tissues
🔹To restore the lost occlusal and maxillomandibular relationships
🔹To restore retention and stability of the denture
🔎 TECHNIQUES OF RELINING
🔶 Open Mouth Relining Technique
👉 Carl O. Boucher’s Reline method (1973)
🔶 Closed Mouth Relining Technique
👉 F.W. Shaffer’s technique (1971)
👉 N.J. Hansen’s technique (1964)
👉 J.F. Bowman’s technique (1977)
👉 L.G. Jordon’s technique (1971)
👉 N.S. Javid et al. technique (1985)
🔎 REBASING PROCEDURE
1. Jig Method
2. Flask Method
3. Articulator Method