“Zero window approach”/trans alveolar-direct sinus lift technique with simultaneous implant placements in a case with residual bone height of 1.8 mm: A nobel approach

Deficient bone height in maxilla following tooth extraction is commonly seen, thus making sinus augmentation a necessity to gain vertical bone height and facilitate implant placements in such cases. In 1970, Tatum used graft into the sinus cavity to increase the available bone, since then various techniques such as lateral window approach, summers technique, modified trephine/osteotome technique, balloon elevation technique, guided sinus lift technique, with/without graft techniques, are in use to augment sinuses and gain bone height. All these techniques have their own advantages and disadvantages one over the other with indications and contraindications. This article presents a Zero Window Approach/trans-alveolar-direct sinus lift (DSL) technique that is done with the help of trephine, osteotomes, DSL instruments and alloplastic graft to gain the desired bone height along with simultaneous implant placements and successful loading of dental implants in a case with deficient bone in posterior maxilla.