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Journal of Oral Science & Rehabilitation Volume 2 | Issue 3/2016 11 M i n i m a l l y i n v a s i v e s i n u s l i f t i m p l a n t s y s t e m wasplacedaftercompletingtheiRaisesurgicalse- quence.ApostoperativeCBCTscanwastakenwith reduced voxel size, field of view and milliampere settings(Fig.5).Aftersurgery,intranasalspraythe- rapy (thiamphenicol glycinate acetylcysteinate, 810 mg/4 mL) was continued for ten days, an an- tibiotic (1 g of amoxicillin and clavulanic acid b.i.d.) for six days and a 0.2% chlorhexidine mouthwash (1 min b.i.d.)fortwoweeks.Asoft dietwas recom- mendedforoneweek,while1gofparacetamolwas prescribed in case ofpain.The sutureswere remo- ved after one week, and oral hygiene instructions were emphasized. Six months after implant placement, a CBCT scanwastakenwiththesameparametersusedfor thepostoperativescan,andthehealingabutments were connected. The bone gain was 18.5 mm (Fig.6).Definitivescrew-retainedmetal-freeresto- rations were delivered eight months after implant placement(Figs.7–9).Theocclusionwascarefully checked. Recall appointments for oral hygiene maintenanceandoralhygieneinstructionswereset for everyfour months after loading. The occlusion was evaluated at eachvisit. CBCTscanswere per- formed oneyearafterimplant loading (20 months after implant placement) and compared with the previouslytaken CBCT scans (Figs.10–16). Discussion The present case report is one ofthe first aimed at evaluating a novel implant systemthat allows for minimally invasive major sinus floor eleva- tion atthetime ofimplant placement.According to a recent Cochrane systematic review, if the residualalveolarbone height is 3–6 mm, atrans- crestal approach to lifting the Schneiderian membrane and placing 8 mm implants maylead tofewercomplicationsthanwould a lateralwin- dow approach and placing implants at least 10 mm long.19 In the case presented, the patient experi- enced minimal discomfort and was functional- ly restored in a shorter period than are patients treated with a two-stage sinus grafting technique. In investigating the transcrestal os- teotometechniqueforsinusflooraugmentation, some researchers have recorded high rates of patient satisfaction.7, 20, 21 Maxillary sinus floor elevation with a transcrestal approach is ad- vocated as a minimally invasive procedure, owing to the minimal surgical flap required. Moreover, the lateral sinus wall remains intact, reducing postoperative morbidity.22, 23 This technique iswidelydocumented inthe literature Figs. 9 & 10 Figs. 11 & 12 Fig. 9 Metal-free framework. Fig. 10 Right lateral view of the definitive prosthesis taken one year after loading. Fig. 11 Frontal view of the definitive prosthesis taken one year after loading. Fig. 12 Left lateral view of the definitive prosthesis taken one year after loading. Volume 2 | Issue 3/201611