A Retrospective Analysis of the Influence of Crown-to-Implant Ratio on Marginal Bone Loss

Abstract

Background: For better exploration about peri-implant bone loss, understanding the crown-to-implant (C/I) ratio is essential. The present work aims to establish site-related variables which influence relationship between the C/I ratio and peri-implant marginal bone loss (MBL) as well as the effect of C/I ratio on variation in MBL surrounding the implant. Materials and Methods: A cohort of 30 patients, either single or multiple, with a total of 50 implants underwent examination to ascertain change in MBL and the C/I ratio. Periapical and bite-wing radiographs were obtained utilizing a bisecting angle technique. Each radiograph underwent computer-assisted calibration by evaluating previously established measurements (e.g., fixture length). The software employed for the measurement was SIDEXIS XG version 2.63. Descriptive and inferential statistics were employed. Results: With a mean MBL of 0.25 mm, a follow-up MBL of 1.14 mm, and an actual MBL of 0.84 mm, the average C/I ratio was determined as 0.84. A statistically significant difference (P < 0.001) was found between baseline and follow-up MBL using paired sample t-test. Additionally, C/I ratio and real MBL showed insignificant positive correlation, according to Pearson’s correlation analysis. Conclusion: The crown–root ratio does not have a significant impact on the actual MBL around the implant.

Keywords

• crestal bone loss
• crown-to-implant ratio
• mbl