The current review showed that the exposure of dental implants in the sinus cavity without the augmentation procedure or graft materials shows a high survival rate of 95.6%, without statistically significant differences according to the level of penetration (lower or higher to 4 mm). Changes in maxillary sinuses in relation to protruding implants within the sinus cavity do not statically affect clinical or radiographic complications of 3.4% and 14.8% respectively. Although caution is necessary, it is not advised to carry out this technique intentionally, since the supporting literature is based only on retrospective studies. Further research is needed, with prospective and randomized studies that directly compare different techniques in equal local and systemic conditions to explore the complications and outcomes of the patient center.