ABC sinus augmentation classification.

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Bone Grafting and Augmentation

Background:

• Posterior maxillary edentulism presents complex challenges for dental implant restoration.
• Sinus pneumatization is often considered, but horizontal and vertical bone defects are frequently overlooked.
• Existing classification systems may not fully encompass all critical factors for successful implant placement.

Purpose of the Study:

• To review current classifications for posterior maxilla implant treatment.
• To introduce a novel, comprehensive classification system for the posterior maxilla.
• To provide a simplified guide for clinicians in treating posterior maxillary edentulism.

Main Methods:

• Review of existing classification systems for posterior maxilla reconstruction.
• Introduction of the "ABC classification" system based on bone height and width.
• Subclassification of Classes B and C based on defect type (horizontal, vertical, combined).

Main Results:

• Class A: Abundant bone (≥10 mm height, ≥5 mm width) allows standard implant placement.
• Class B: Limited bone (6-9 mm height) with subcategories for horizontal (h), vertical (v), or combined (c) defects.
• Class C: Compromised bone (≤5 mm height) with similar subcategories as Class B.

Conclusions:

• The ABC classification system offers a straightforward approach to evaluating bone availability in the posterior maxilla.
• This system integrates critical factors like bone height, width, and defect type for improved treatment planning.
• The ABC classification aims to enhance predictability and success rates for dental implants in the posterior maxilla.