Radiographic predictive factors for 10-year survival of removable partial denture abutment teeth: Alveolar bone level and density.
J Prosthodont Res
; 67(3): 437-443, 2023 Jul 31.
Article
en En
| MEDLINE
| ID: mdl-36418082
ABSTRACT
PURPOSE:
To determine postoperative periodontal and radiographic factors that predict the survival rates of abutments of removable partial dentures (RPDs).METHODS:
Patients who wore RPDs for > 10 years and received supportive periodontal therapy were included. Periodontal examinations and radiographic assessments were conducted on 83 abutment teeth in 35 patients at baseline, and five years after RPD insertion. In addition to conventional factors, such as tooth mobility at 5 years, radiographic factors, such as the crown-root ratio (ΔCR ratio) and gray-level changes reflecting changes in alveolar bone density (ΔABD), were evaluated. The impact of the covariables on the 10-year survival of abutment teeth was estimated using a multivariate Cox regression model, considering multicollinearity.RESULTS:
Patients were classified as having A2-B2 (45.7%) and B3-C2 (54.3%) tooth loss, according to the Eichner classification. A probing depth ≥ 4 mm, tooth mobility ≥ grade 1, and CR ratio ≥ 1 were found in 30.1%, 33.7%, and 51.8% of abutment teeth, respectively. The 10-year survival rate of abutment teeth was 86.7%. Multivariate analysis showed that the 10-year survival of abutment teeth was significantly associated with root canal treatment (P = 0.045, hazard ratio [HR] = 1.23), the 5-year ΔCR ratio (P = 0.022, HR = 3.20), and ΔABD on the edentulous side of the abutment teeth (P = 0.047, HR = 1.08).CONCLUSIONS:
In addition to root canal treatment, changes in the CR ratio and radiographic alveolar bone density at five years predicted the long-term survival rate of RPD abutments.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Movilidad Dentaria
/
Pérdida de Diente
/
Dentadura Parcial Removible
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Humans
Idioma:
En
Revista:
J Prosthodont Res
Asunto de la revista:
ODONTOLOGIA
Año:
2023
Tipo del documento:
Article
País de afiliación:
Japón