TY - JOUR
T1 - The effect of crown-to-implant ratio on the clinical performance of extra-short locking-taper implants
AU - Mangano, Francesco
AU - Frezzato, Irene
AU - Frezzato, Alberto
AU - Veronesi, Giovanni
AU - Mortellaro, Carmen
AU - Mangano, Carlo
N1 - Publisher Copyright:
Copyright © 2016 by Mutaz B. Habal, MD.
PY - 2016
Y1 - 2016
N2 - Background: The aim of the present prospective 5-year study was to evaluate the influence of crown-to-implant ratio (C/I ratio) on the survival, peri-implant marginal bone loss, and complications of extra-short (6.5 mm) locking-taper implants placed in the posterior areas of the jaw. Methods: Over a 2-year period, all patients presenting with partial edentulism associated with vertical defects of the posterior alveolar ridges and sufficient bone volume to place extra-short (6.5mm length × 5mm diameter) implants were considered for inclusion in this study. Results: Fifty-one patients (22 men, 29 women; aged between 40 and 75 years) were included in this study. Sixty-eight extra-short, locking-taper implants were placed to support 49 single crowns and 9 fixed partial dentures. The C/I ratio was <2 for 51 implants and ≥2 for 17 implants. All patients underwent the 5-year clinical examination. Two implants failed. Failure proportion was 2% in the C/I<2 group, and 6% in the C/I≥2 group: this difference was not statistically significant (P=0.4). After 1 year of loading, a mean marginal bone loss of 0.29 and 0.39 was reported in the C/I<2 group and the C/I≥2 group, respectively. After 5 years of loading, a mean marginal bone loss of 0.38 and 0.48 was reported in the C/I<2 and C/I≥2 groups, respectively. The linear regression model failed to find a correlation between the C/I ratio and marginal bone loss along time, with a 0.023mm (95% CI:0.002; 0.048) increase in 1-year bone resorption for every 0.1 increase in C/I ratio (P=0.07). At 5-year, the association reduced to 0.019mm (P=0.18). Only a few complications were reported. There was no statistically significant difference in the prevalence of biological (P=0.9) complications between the 2 groups. Prosthetic complications were more frequent with C/I≥2 (12.5%) than with C/I<2 (6%), but this difference was not statistically significant (P=0.6). Conclusions: Extra-short, locking-taper implants may be successfully used in the posterior areas of the jaw.
AB - Background: The aim of the present prospective 5-year study was to evaluate the influence of crown-to-implant ratio (C/I ratio) on the survival, peri-implant marginal bone loss, and complications of extra-short (6.5 mm) locking-taper implants placed in the posterior areas of the jaw. Methods: Over a 2-year period, all patients presenting with partial edentulism associated with vertical defects of the posterior alveolar ridges and sufficient bone volume to place extra-short (6.5mm length × 5mm diameter) implants were considered for inclusion in this study. Results: Fifty-one patients (22 men, 29 women; aged between 40 and 75 years) were included in this study. Sixty-eight extra-short, locking-taper implants were placed to support 49 single crowns and 9 fixed partial dentures. The C/I ratio was <2 for 51 implants and ≥2 for 17 implants. All patients underwent the 5-year clinical examination. Two implants failed. Failure proportion was 2% in the C/I<2 group, and 6% in the C/I≥2 group: this difference was not statistically significant (P=0.4). After 1 year of loading, a mean marginal bone loss of 0.29 and 0.39 was reported in the C/I<2 group and the C/I≥2 group, respectively. After 5 years of loading, a mean marginal bone loss of 0.38 and 0.48 was reported in the C/I<2 and C/I≥2 groups, respectively. The linear regression model failed to find a correlation between the C/I ratio and marginal bone loss along time, with a 0.023mm (95% CI:0.002; 0.048) increase in 1-year bone resorption for every 0.1 increase in C/I ratio (P=0.07). At 5-year, the association reduced to 0.019mm (P=0.18). Only a few complications were reported. There was no statistically significant difference in the prevalence of biological (P=0.9) complications between the 2 groups. Prosthetic complications were more frequent with C/I≥2 (12.5%) than with C/I<2 (6%), but this difference was not statistically significant (P=0.6). Conclusions: Extra-short, locking-taper implants may be successfully used in the posterior areas of the jaw.
KW - Complications
KW - Dental implants
KW - Extra-short implants
KW - Peri-implant marginal bone loss
KW - Survival
UR - http://www.scopus.com/inward/record.url?scp=84964319819&partnerID=8YFLogxK
U2 - 10.1097/SCS.0000000000002562
DO - 10.1097/SCS.0000000000002562
M3 - Article
SN - 1049-2275
VL - 27
SP - 675
EP - 681
JO - Journal of Craniofacial Surgery
JF - Journal of Craniofacial Surgery
IS - 3
ER -