Evaluation of Alveolar Bone Thickness in the Maxillary Anterior Esthetic Zone of Six Anterior Teeth – A Retrospective CBCT Study

Why It Matters

Insufficient LABT increases the risk of implant failure and aesthetic complications, making gender‑specific bone assessment critical for successful anterior maxillary restorations.

Key Takeaways

• Mean labial alveolar bone thickness under 2 mm across all six teeth
• Thinest measurements (≈0.9 mm) observed at mid‑root level (Point B)
• No significant side or age differences in bone thickness
• Females exhibit significantly thinner bone at canine sites than males

Pulse Analysis

Accurate assessment of labial alveolar bone thickness (LABT) is a cornerstone of modern implant dentistry, particularly in the maxillary anterior esthetic zone where visual outcomes drive treatment success. Recent research leveraging cone‑beam computed tomography (CBCT) has highlighted pronounced ethnic and regional variations in bone morphology, prompting clinicians to seek population‑specific data. The Saudi Arabian study examined 206 CBCT scans, measuring LABT at three standardized levels—crestal (Point A), mid‑root (Point B), and apical (Point C)—across the six anterior teeth, providing a robust dataset for evidence‑based planning.

The findings reveal a consistent shortfall against the 2 mm threshold deemed optimal for implant stability. Mean LABT ranged from 0.83 mm at the mid‑root level to 1.55 mm at the apical third, with the crestal region falling in between. While side‑to‑side and age‑related variations were statistically insignificant, gender emerged as a decisive factor: female patients displayed notably thinner bone at canine sites, especially at Points A and B. This gender disparity aligns with broader anatomical research indicating reduced cortical thickness in women, which can compromise primary implant stability and increase the likelihood of marginal bone loss.

For practitioners in the United States and globally, these insights underscore the necessity of individualized pre‑operative imaging and risk assessment. When LABT falls below the 2 mm benchmark, clinicians should consider bone augmentation techniques, such as guided bone regeneration or ridge splitting, before implant placement. Moreover, the study’s emphasis on gender‑specific differences encourages a more nuanced consent process and treatment planning dialogue. Integrating CBCT‑derived measurements into digital workflows not only enhances surgical precision but also mitigates postoperative complications, ultimately supporting higher long‑term success rates for anterior maxillary implants.