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