Overview
Wear resistance is one of the most important physical properties of teeth, and wear resistance of zirconia against artificial acrylic, enamel and composite resin denture teeth has not been clearly established.
Implant-supported dental restorations present a higher threshold for occlusion perception when compared to natural teeth, which can occlusal overload mechanisms or lead to wear of rehabilitation materials or the antagonist arch.
In clinical conditions, however, many other factors influence the complex interaction between dental enamel and opposing substrates: patient-related factors such as dietary habits, dysfunctional occlusion, masticatory forces, and bruxism contribute to accelerated enamel loss of antagonist teeth.
Description
It will be our intention to perform a prospective study and proof-of-concept to assess wear in natural dentition, Full arch implant supported rehabilitation (FAISR) and opposing arches. Wear according to type of rehabilitation and of opposing arch, technical complications, parafunction and number of placed implants will be assessed.
Intra-oral digital acquisition will be performed at pre-defined intervals. Changes over time will be assessed through a previously described digital superimposition methodology volumetric changes determined.
Patients will be scanned using an intraoral dental scanner (T0)
Patients will be recalled at every 4-months (T1), 8-months (T2) and 12-months (T3) visits for re-scanning and from there every 6-months
Scanned images will be compared using a metrology software to determine maximum vertical wear of teeth and root mean square wear.
Eligibility
Dentate Group :
Inclusion criteria
- fully dentate (with at least 10 teeth ) and do not have any tooth mobility;
- at least 12months follow up
Exclusion criteria
- missing more than 4 teeth, extensive caries, bonded orthodontic brackets
Edentulous Group:
Inclusion Criteria:
- Maxilla or Mandible Implant full-mouth implant restoration
- Monolithic ceramic or hybrid-acrylic restoration
- at least12 months Follow-up
Exclusion Criteria:
- Heavy bruxists
- Patients that changed the full arch rehabilitation during the study (ex: framework fracture or lab reparation)