Background: The posterior maxillary area sometimes has insufficient bone mass for dental implants. The augmentation of the sinus floor allows the implant to be placed in the posterior of the upper jaw.

Purpose: The aim of this study was to compare the effectiveness antral balloon assisted maxillary sinus elevation and traditional sinus floor elevation followed by bone graft and delayed implant placement the posterior maxillary area.

Material and methods: A total of 68 patients, (aged 27 to 56 years,32 women and 36 men), without any systemic diseases, with unilateral/bilateral missing teeth and atrophy of the posterior maxillary area, who required an enlargement of the sinus prior to implant placement, whom the location of the sinus floor from the crest was 3-5mm, width ≥5 mm were included in the study between 2018 and 2021. Patients underwent a thorough clinical examination according to the generally accepted scheme. All patients were selected after meticulous evaluation of their medical histories and dental examinations, including OPG and dental ComputedTomography (CT) scans.

Results: The sinus lift using balloon technique was performed successfully in patients 1 group, with no complications. In 9 patients 2 group, perforation of the sinus membrane occurred during the operation, sinusitis in 4 patients, graft failure in 3 patients. Regardless of the approach used, both approaches showed significant increases in bone mass gain. Though not statistically significant difference, balloon-assisted procedure showed more mean bone gain (8.4 mm) compared to osteotome -assisted procedure (8.1 mm). The mean amount of Marginal Bone Loss (MBL) in patients 1 group 3 years follow-up was 0.86 mm in patients 2 group showed significantly less marginal bone loss 1,16mm. The implant survival rate 3 years follow-up was in patients 1 group was 97.62%, in patients 2 groups was 95.2%.

Conclusions: Research has shown that the balloon sinus lifting offers predictable, safe and effective results, and eliminates the complications associated with traditional side window techniques. However, further controlled clinical trials are needed to evaluate the efficacy and safety of these technique for their appropriate implementation in the field of oral implanotology.