Abutment-free Tissue-Level Implants for Personalized Monolithic Zirconia Implant Crowns: A Retrospective Cohort Study

Purpose: This study aims to compare the peri-implant bone surrounding a new abutment free tissue-level implant design with classic tissue-level implants restored with titanium-base abutments. Results: No significant differences in patient demographics or complications were found between abutment-free and conventional implants. However, abutment-free implants exhibited less buccal bone loss than traditional implants. The abutment-free implant group had significantly lower buccal bone loss (p-values of 0.025 and 0.024 for oral palatal/lingual bone and alveolar ridge width, respectively). Conclusion: The results of this study suggest that abutment-free dental implants offer advantages in reducing buccal bone loss compared to conventional implants, potentially due to their ability to mitigate risks to peri-implant tissues. Further research is warranted to evaluate their long-term efficacy and safety.