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Long‐term stable vertical bone regeneration after sinus floor elevation and simultaneous implant placement with and without grafting
Author(s) -
Verdugo Fernando,
Uribarri Agurne,
Laksmana Theresia,
D'addona Antonio
Publication year - 2017
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12540
Subject(s) - medicine , implant , bone grafting , sinus (botany) , dentistry , grafting , sinus lift , surgery , materials science , biology , botany , composite material , genus , polymer
Abstract Background Less invasive surgical approaches to regenerate bone intra‐sinus and allow long‐term functional implant stability are needed. Purpose To evaluate long‐term vertical bone regeneration after sinus floor elevation and simultaneous implant placement with and without bone grafting. Methods Vertical bone gains (VBG) post‐sinus elevation, with and without grafting, were evaluated in thirty individuals presenting an average residual bone height (RBH) of 4.2 mm using a standardized digital technique. Measurements were taken preoperatively, and at an average of 64.6 months follow‐up. Clinically, peri‐implant tissues were assessed for pocket formation and presence of inflammation to evaluate established success criteria. Results Overall, RBH averaged 4.2 ± 1.1 mm (range: 1.8‐5.8) and VBG 7.7 ± 1.6 mm (range: 6.0‐12.9). Mean difference of 7.6 mm between vertical bone heights (VBH) at augmented implants sites and initial RBH, 11.8 versus 4.2 mm, ( P < .0001, CI95%: 6.9‐8.2) was statistically significant. RBH averaged 4.5 ± 0.8 mm and 3.8 ± 1.2 ( P = .07) and VBG 6.8 ± 0.5 and 8.5 ± 1.9 mm ( P = .003, CI95%: 0.6‐2.7), for nongrafted and grafted individuals, respectively. The grafting group received an average graft volume of 0.35 ± 0.1 cc (range: 0.25‐0.5) per implant site. Long‐term follow‐ups average 64.6 months (range: 36‐144) and all implants met the success criteria. VBG ≥ 7 mm were 7.3 times more likely to develop on grafted sites (OR = 7.3, P = 0.02, CI95%: 1.2‐46.2). Conclusion None to negligible amounts of grafting material are required to regenerate substantial amounts of autogenous bone into atrophic sinus cavities after simultaneous implant placement. The regenerated VBH seems stable for functional implant stability long‐term. Implant success rates were 100% at an average of 64.6 months.