Sinus Lift Indication — ORE Part 1 MCQ

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ModerateOral SurgerySinus Lift IndicationORE Part 1

A patient is planned to receive a 10 mm implant in the upper left premolar region. CBCT demonstrates 5 mm of residual alveolar bone height between the ridge crest and the maxillary sinus floor, with adequate ridge width. Which supplementary procedure is most likely required?

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Correct answer: E — Sinus floor elevation with vertical augmentation

**A is correct.** There is 5 mm of residual bone below the sinus but a 10 mm implant is planned, so the limiting problem is inadequate **vertical** bone height in the posterior maxilla. Sinus floor elevation creates additional subantral height and may be performed with simultaneous implant placement when primary stability is achievable. Literature proposes sinus augmentation when residual height is below 8 mm; for a single-tooth space with 5–8 mm available bone, a transcrestal approach may be appropriate. Ridge splitting and ridge expansion address a narrow ridge, not a vertical deficiency. Distraction osteogenesis can increase vertical height but is unnecessarily extensive for this conventional sinus-related defect. No adjunctive procedure would not accommodate the planned 10 mm implant safely within available bone.

Reference: Hakimi R, Shu JJ, et al. “Sinus floor elevation procedures to enable implant placement and integration: techniques, biological aspects and clinical outcomes.” 2017. https://pubmed.ncbi.nlm.nih.gov/28000271/