- Mc reason = bone resportion occurs as denture takes support from bone and tissue = after some time = denture will become loosely fit
- Only done when occlusal contacts are proper
- RELINING =
- Tissue changes are minimum
- It means to resurface the tissue surface of denture to improve FIT
- Rebasing
- Tissue changes are maximum
- Extreme version of relining
- More material is needed for refitting
- If both maxilla and mandible needs reline or rebase
- Maxillary procedure is done first
- Cause Max denture maintains the occlusion plane
- RELING PROCEDURES
| CLINICAL | LAB |
| STATIC = open or closedFunctional relineChairside | Articulator methodJig method Flask method |
- OPEN MOUTH TECHNIQUE
- Given by boucher
- Impressions made independently
- Max and mand impression separately
- Not using any existing occlusion
- Denture of the pt= used as impression tray
- Material = ZnOE
- CLOSED MOUTH
- Impression material is placed on intalglio surface of denture
- Place in pt mouth
- Ask pt to bite = functional pressure while recording
- Problem
- It doesnt record tissues at rest
- How to determine the amount of pressure needed? Pt is biting and pt doesnt know how much pressure to be applied = Pressure variation
- Impression material might move before the material sets
- Hence, Lab remounting of denture become extremely necessary
- FUNCTIONAL METHOD
- Dentures are not sent to the lab
- Soft liner or tissue conditioner is used as impression materials
- After 3- 5 days of using soft liner = you take Final impression is when there is ABSOLUTE NO INJURIES = soreness and ulcers are healed in the pt
- Chairside = acrylic chemical cure must not be used = they might burn mucosa due to heat generation
- SOFT LINERS/ TISSUE CONDITIONERS
- Shock absorber
- This shock is energy transmitted to the denture bearing areas or ridge during mastication
- Short term soft liner
- is called TISSUE conditioner 2m***
- Self curing or chemical cure
- After 7 days, you MUST remove the material
- It will absorb and interact with saliva
- Hence, it will loose its property of elasticity
- Plasticized acyrlic =
- long term soft liner
- Good bond between acyrlic denture and acylic liner
- Silicone elastomers
- No acyrlic
- Rubber base material
- Adv = good tissue adaptation
- Doesnt form Good bond with acyrlic denture
- More prone to fungal infections
Dentowesome 