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Resorbed maxilla.
| Ridge height | Bone type | History of periodontitis, smokers, patient’s age | Treatment |
|---|---|---|---|
| <5mm | Type I, II, III | No | Sinus lift |
| Type IV | Yes | Sinus lift | |
| 5-6mm | Type I, II, III | No | Short implants |
| Type IV | Yes | Sinus lift | |
| ≥6mm | Type I, II, III | No | Short implants |
| Type IV | Yes | Short implants |
