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Journal of Oral Science & Rehabilitation No. 1, 2018

S i n u s l i f t a n d M g-e H A/co l l a g e n-b a s e d s c a f f o l d Sinus lift surgery in severely resorbed maxillae: One-year follow-up Luigi Canulloa a Private practice, Rome, Italy C o r r e s p o n d i n g a u t h o r : Dr. Luigi Canullo Via Nizza 46 00198 Rome Italy T +39 06 8411980 H o w t o c i t e t h i s a r t i c l e : Canullo L. Sinus lift surgery in severely resorbed maxillae: one-year follow-up. J Oral Science Rehabilitation. 2018 Mar;4(1):08–14. Abstract O b j e c t i v e The aim of this prospective study was to clinically analyze the behavior of implants inserted into severely resorbed maxillae after sinus grafting. M a t e r i a l s a n d m e t h o d s Twenty-six wide-diameter implants with a rough surface over their entire length were inserted during 13 consecutive sinus lifts. Radiographic analysis was preoperatively requested for each patient. After Schneiderian membrane elevation, a magnesium-enriched hydroxyapatite (Mg-e HA) and collagen-based scaffold with a porous 3-D structure was used to prevent perforation during implant placement. Sinus grafting was per- formed using a biomimetic Mg-e HA. No membrane was used to cover the buccal window. The preoperative residual bone height ranged between 1 and 4 mm (mean value: 2.5 mm; SD: 1.0 mm). After 6 months of healing, uncovering was carried out and the defin- itive restoration was seated after 2 weeks. In order to monitor the stabil- ity changes, resonance frequency analysis was performed and ISQ (Implant Stability Quotient) values were collected at the first surgery (baseline, T0), at the abutment connection (T1) and at the 1-year follow-up (T2). In order to measure bone changes, the patients underwent panoramic radiographs after 2-year follow-up. Image analysis software calculated the grafted bone height changes at the level of the implant site, compar- ing preoperative and follow-up panoramic radiographs. R e s u l t s No postoperative complications were observed. The mean ISQ value was 42.5 (SD: 2.7) at T0, 75.3 (SD: 8.2) at T1 and 81.5 (SD: 2.6) at T2. Statisti- cally significant differences (P ≤ 0.005) regarding mean ISQ values were found between T1 and T0, as well as between T1 and T2. After 12 months of functional loading, only 1 implant was lost (cumulative survival rate: 96.15%). During the same observation period, the mean radiographic vertical height of the grafted sinus floor was 11.05 mm (SD: 2.10 mm), with a mean gain of 8.50 mm. C o n c l u s i o n Within the limitations of this study, despite preoperative critical residual bone height, maxillary sinus lift restoration using a biomimetic Mg-e HA and an Mg-e HA/collagen-based scaffold with a porous 3-D structure seems to be a reliable procedure. K e y w o r d s Sinus lift, magnesium enriched hydroxyapatite, x-ray analysis, ISQ. 08 Volume 4 | Issue 1/2018 Journal of Oral Science & Rehabilitation

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