Evaluation of bone resorption around anatomic and non- anatomic modified zirconia implants

Abstract

Objective: The use of zirconia implants has increased due to their teeth like color, mechanical properties, biocompatibility, and low plaque affinity. Radiographic evaluation is a noninvasive method that can be performed at any stage of implant healing. Radiography has proved to be a more sensitive method of determining pericervical bone loss. The aim of this study is to evaluate the crestal bone resorption around anatomic and non-anatomic zirconia implants.

Material and methods: 19  zirconia implants at premolar area have applied at 19 patients divided into two groups, according to immediate implant placement after extraction or delayed implant placement, group A included 9 anatomic zirconia implants and group B included10 non- anatomic zirconia implants, the radiographic measured has evaluated for each implant at four periods of time, implant placement, after 3 months, 12 months, and 18 months of implantation.

Results: marginal bone loss in group A (anatomic zirconia implant) was 0.77±0.24 mm after 18 months whereas marginal bone loss in group B (non-anatomic zirconia implants) was 0.51±0.07 mm after 18 months. Statistical significance for all comparisons was set at α=0.05 and All statistical computations were performed with statistical software (IBM SPSS statistics, V25, IBM Crop). The Time periods show statistically significant impact on bone loss for both Anatomic (F=64.12, P<0.001) and non-anatomic (F=108.51, P<0.001) implants groups.

Conclusion: zirconia implants showed a greater decrease in marginal bone loss which was much more around anatomic implants than non-anatomic implants and both were within acceptable limits .