Tags

Type your tag names separated by a space and hit enter

Radiographic changes of trabecular bone density after loading of implant-supported complete dentures: A 3-year prospective study.
Clin Implant Dent Relat Res. 2019 Oct; 21(5):1041-1047.CI

Abstract

BACKGROUND

Bone tissues may undergo remodeling under functional mechanical stimuli.

PURPOSE

This prospective study on implant-supported fixed complete dentures (IFCDs) evaluated the radiographic trabecular bone changes in density by means of gray levels and texture analysis variables after up to 3-year loading.

MATERIALS AND METHODS

The sample consisted of digital periapical radiographs of 63 distal implants of hybrid IFCDs installed in 30 patients (22 women, mean age of 62 ± 7.8 years). Digital periapical radiographs were taken after prosthesis installation, and 1 and 3 years after IFCD loading. Longitudinal images of each implant were superimposed, and the same regions of interest were selected for measurement of gray levels statistics (mean gray levels, SD, and coefficient of variation [CV]) and texture parameters (correlation, contrast, entropy, and angular second moment). Data were analyzed by mixed regression models.

RESULTS

Mean gray levels increased for 1 year (P < .05), for 3 years (P < .01) and for maximum bite force (P < .01). The interaction between bruxism and time in 1 year was significant (P < .01) for a decrease in CV. No significant effect of texture analysis variables was found (P > .05).

CONCLUSIONS

The results suggest an increase of radiographic bone density as measured by an increase in mean gray levels and a decrease in CV in IFCD distal implants up to 3 years of loading.

Authors+Show Affiliations

Department of Prosthodontics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.Department of Prosthodontics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.Department of Radiology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.Department of Statistics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.Department of Statistics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.Department of Prosthodontics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31373178

Citation

Gerhardt, Maurício N., et al. "Radiographic Changes of Trabecular Bone Density After Loading of Implant-supported Complete Dentures: a 3-year Prospective Study." Clinical Implant Dentistry and Related Research, vol. 21, no. 5, 2019, pp. 1041-1047.
Gerhardt MN, Villarinho EA, Rockenbach MIB, et al. Radiographic changes of trabecular bone density after loading of implant-supported complete dentures: A 3-year prospective study. Clin Implant Dent Relat Res. 2019;21(5):1041-1047.
Gerhardt, M. N., Villarinho, E. A., Rockenbach, M. I. B., Vigo, Á., Dos Reis, R. C. P., & Shinkai, R. S. A. (2019). Radiographic changes of trabecular bone density after loading of implant-supported complete dentures: A 3-year prospective study. Clinical Implant Dentistry and Related Research, 21(5), 1041-1047. https://doi.org/10.1111/cid.12829
Gerhardt MN, et al. Radiographic Changes of Trabecular Bone Density After Loading of Implant-supported Complete Dentures: a 3-year Prospective Study. Clin Implant Dent Relat Res. 2019;21(5):1041-1047. PubMed PMID: 31373178.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Radiographic changes of trabecular bone density after loading of implant-supported complete dentures: A 3-year prospective study. AU - Gerhardt,Maurício N, AU - Villarinho,Eduardo A, AU - Rockenbach,Maria Ivete B, AU - Vigo,Álvaro, AU - Dos Reis,Rodrigo C P, AU - Shinkai,Rosemary S A, Y1 - 2019/08/01/ PY - 2019/02/25/received PY - 2019/06/02/revised PY - 2019/07/08/accepted PY - 2019/8/3/pubmed PY - 2019/12/4/medline PY - 2019/8/3/entrez KW - bone density KW - bruxism KW - dental implants KW - occlusal force KW - radiology KW - texture analysis SP - 1041 EP - 1047 JF - Clinical implant dentistry and related research JO - Clin Implant Dent Relat Res VL - 21 IS - 5 N2 - BACKGROUND: Bone tissues may undergo remodeling under functional mechanical stimuli. PURPOSE: This prospective study on implant-supported fixed complete dentures (IFCDs) evaluated the radiographic trabecular bone changes in density by means of gray levels and texture analysis variables after up to 3-year loading. MATERIALS AND METHODS: The sample consisted of digital periapical radiographs of 63 distal implants of hybrid IFCDs installed in 30 patients (22 women, mean age of 62 ± 7.8 years). Digital periapical radiographs were taken after prosthesis installation, and 1 and 3 years after IFCD loading. Longitudinal images of each implant were superimposed, and the same regions of interest were selected for measurement of gray levels statistics (mean gray levels, SD, and coefficient of variation [CV]) and texture parameters (correlation, contrast, entropy, and angular second moment). Data were analyzed by mixed regression models. RESULTS: Mean gray levels increased for 1 year (P < .05), for 3 years (P < .01) and for maximum bite force (P < .01). The interaction between bruxism and time in 1 year was significant (P < .01) for a decrease in CV. No significant effect of texture analysis variables was found (P > .05). CONCLUSIONS: The results suggest an increase of radiographic bone density as measured by an increase in mean gray levels and a decrease in CV in IFCD distal implants up to 3 years of loading. SN - 1708-8208 UR - https://www.unboundmedicine.com/medline/citation/31373178/Radiographic_changes_of_trabecular_bone_density_after_loading_of_implant-supported_complete_dentures:_A_3-year_prospective_study L2 - https://doi.org/10.1111/cid.12829 DB - PRIME DP - Unbound Medicine ER -