Sinus implants stabilization in Misch IV Class by means of S.I.S. device: A Clinical Study

AIMS.: In Misch Class IV dental implants are not normally placed at the same time as the sinus lift procedure. For this type of situation the use of several devices to immediately stabilise implants lacking in primary stability is proposed. Among these, the titanium S.I.S. plate results as being the most straightforward. This study proposes the evaluation of the effectiveness and stability of the results of this method in the short term on a greater number of patients, monitoring bones levels and implant stability. METHOD.: 14 patients were selected, 9 males and 5 females, aged between 43 and 75 years of age. Overall, 42 implants were placed in the upper posterior edentulous zones with Misch Class IV atrophy including first and second premolars and first molars, opposite fixed teeth, and were stabilised using the S.I.S. plate. RESULTS.: Radiographic controls and ISQ measurements with AFR at 1, 6 and 12 months after loading testify to the stability of the bone levels which concur with success criteria found in literature. The technique described seems to be able to ensure success in cases of Misch Class IV with contemporaneous placement of the osseo-integrated implants. CONCLUSION.: This clinical study, even if carried out on a small number of patients (14) and implants (42) represents the largest case history published. The technique described seems to ensure the success of cases of Misch Class IV with contemporaneous placement of osseo-integrated implants. The technique is straightforward and reproducible and does not cause further trauma. The S.I.S. allows for the stabilisation of the dental implants and the residual crest when there is a lack of primary stability. In Misch Class IV this means a considerable reduction in treatment times.