14y Prospective Study on Posterior Zirconia-based 3-unit FDPs

Federico II University

Status

Active, not recruiting

Conditions

Prosthesis Survival

Treatments

Other: 2 zirconia FDPs

Other: 1 zirconia FDP

Study type

Observational

Funder types

Other

Identifiers

NCT04374201

3Y-TZP Federico II

Details and patient eligibility

About

The main objective of the present prospective study is to evaluate the effectiveness of posterior zirconia FDPs after 14 years of function.

Full description

thirty-seven patients needing to replace either premolars or molars were involved and 48 3-unit zirconia-based FDPs were fabricated. Patients included in the present clinical study met specific inclusion criteria and clinical procedures were standardized.

Frameworks with a 9 mm2 cross section of the connectors and 0.6 mm minimum thickness of the retainers were made by means of Computer Aided Design/Computer Assisted Manufacturing. A resin cement was used to lute the restorations. The patients were recalled after 6 and 12 months and then yearly up to a total follow-up of 14 years. The United States Public Health Service criteria were used in order to examine technical and esthetic outcomes. Success and survival rates

Enrollment

37 patients

Sex

All

Ages

21 to 68 years old

Volunteers

Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

good general health;
ASA I or ASA II according to the American Society of Anesthesiologists;
good periodontal health;
Angle class I occlusal relationship;
minimum of 20 teeth;
good oral hygiene;
no evident signs of occlusal parafunctions and/or temporo-mandibular disorders.

Moreover, the abutment teeth had to fulfill the following inclusion criteria:

periodontal health (absence of tooth mobility, absence of furcation involvement);
proper positioning in the dental arch (tooth axes adequate for a FDP);
sufficient occlusal-cervical height of the clinical crown (≥4 mm) for the retention of a FDP;
vital or endodontically treated to a clinically sound state;
opposing natural teeth or fixed prostheses.

Exclusion Criteria:- subjects preferring implant-supported prostheses;