Elevación de seno transcrestal con inserción de implantes ultracortos de 4,5 mm de longitud en zonas maxilares posteriores con hueso residual menor o igual a 3 mm de altura

Zusammenfassung

Introduction: PPosterior maxillary atrophy with pneumatization of the maxillary sinus is a common problem. The protocols for rehabilitating this area have changed from conventional sinus lift to transcrestal lift. Even so, there are cases with a very low available bone volume in height that require new procedures such as 4.5 mm implants. The following case series shows patients treated with this procedure. Material and methods: A retrospective study is presented in which 4.5 mm long implants inserted in maxillary posterior sectors with a residual bone height equal to or less than 3 mm were evaluated and a transcrestal sinus lift was performed at the same time. Subsequently, a radiographic follow-up was carried out, estimating crestal bone loss and implant survival. The primary variable was implant survival and mesial and distal bone loss were recorded as secondary variables. Results: Thirteen patients were recruited and 15 implants were inserted that met the previously established inclusion criteria. The mean initial ridge height where the implants included in the study were placed was 2.85 mm (+/- 0.20) with a range between 2.50 and 3 mm. No complications related to the surgery were reported in any of the cases. The implants had a mean follow-up of 13.33 months after loading (+/- 3.09) with no complications or failures during this follow-up time, so survival was 100%. Conclusions: Preliminary data obtained in the present study show a predictable alternative to lateral window sinus lift with less morbidity for patients.