Sub-antral volumetric variation after a modified trephine sinus elevation approach: An 8-month prospective study

• DOI: 10.23805/jo.2021.13.04.8
• Publication Date: 2021-10-11
• Authors: Cécile Freiha; A.R. Kassir; Nabil Ghosn; Nadim Mokbel; Nada Naaman; Maroun Dagher
• Keywords: Osteotome; Implant stability quotient; Trephine; Sinus (botany); Sinus lift

Aim To overcome vertical deficiency of atrophic posterior maxilla, sinus floor elevation has been used for several decades either through a transcrestal or lateral approach. In 1999, Fugazzotto et al. described modified trephine/osteotome technique augmentation at the time maxillary molar extraction without implant placement. A trephine was to create bone core in middle site and gently malleted apically. 2002, same principle place dental implants healed molars sites with limited residual height (RH). This procedure demonstrated 98.3% survival rate 4 years but lacked radiographic information. The aim present study assess efficacy elevation placement, using clinical cone beam evaluation. Materials methods Twenty-one were placed premolar 3≤ RH ≤6mm approach evaluated clinically radiographically baseline (T1), 3 (T3) 8 (T8) months. Results Implant 100% Sub-antral volumetric gain between T1 T8 20.34%. Linear 2.1 ± 1.1 mm buccally; 2.0 1.4 palatally; 2.5 1.6 mesially; 1.5 distally. Mean linear 2.0±1.1 mm calculated on CBCT. stability quotient (ISQ) 66.378±7.931, 67.921±14.369 T3 statistically significant difference two measurements. Residual positively correlated vestibular, palatal, mesial gain. Signs Schneiderian membrane tearing were noticeable one case. Conclusion that sufficient subantral formation can be obtained high low post-operative morbidity.