Prevalence and management of Schneiderian membrane perforations during sinus‐lift procedures

Abstract

This clinical study was undertaken to evaluate the prevalence of surgical complications of the sinus graft procedure and to set a protocol to repair sinus membrane perforations intraoperatively using a variety of techniques and materials. From January 2000 to May 2005, 338 patients were studied, on whom 474 sinus floor augmentation procedures were performed, and a total of 1166 dental implants were simultaneously placed. A total of 104 perforations of the sinus membrane were observed (19 were bilateral). In group number 1, sinus membrane perforations of <5 mm were observed in 56 sinus augmentation procedures (53.85%), 44 were treated using a resorbable collagen membrane and 12 were sutured with a resorbable material. In group number 2, 28 sinus membranes had a perforation size between 5 and 10 mm (26.92%) and were treated using lamellar bone combined with a resorbable membrane. Group number 3 consisted of 20 sinus membrane perforations>10 mm (19.23%), 10 were covered with lamellar bone combined with a buccal fat pad flap, six were treated with a mandibular block graft and four perforations were treated with only a lamellar bone sheet. Two-hundred and seventy-eight implants were placed under repaired membrane perforations and 247 implants survived. Interestingly enough, all the 25 implants that failed to integrate were placed under perforated and reconstructed membranes during the sinus lift procedure. Based on the results of this study, the survival rates of implants placed under reconstructed membranes correlate inversely with the size of the perforations.

Maxillary sinus perforation by orthodontic anchor screws

“…To guarantee safe placement, researchers should verify in an in vivo clinical study that there is no development of sinusitis in cases of miniscrew perforation of the sinus. A case report using miniscrews (15) supported the findings of studies on maxillary sinus augmentation (sinus-lift procedure) (16)(17)(18). It found that while small, uncomplicated perforations may heal spontaneously, larger perforations in unfavorable areas can cause inflammation and other complications.…”

Success Rate of Dental Implants Placed in the Atrophic Posterior Maxilla with Intentional Sinus Floor Perforation in Lieu of Indirect Sinus Augmentation: A Retrospective Report of 26 Consecutive Patients and Literature Review

“…They concluded that the sinus membrane perforation was not shown to be a significant factor in the rate of implant complications. Numerous case reports of accidental sinus perforation during implant placement conclude that the perforation did not lead to any serious sequela or morbidity [8] [9].…”

Manejo de defectos óseos anteroposteriores en el frente estético

“…16,17 Estas membranas no reabsorbibles también pueden utilizarse en perforaciones en la membrana Schneideriana del seno maxilar. 18 El efecto barrera es más difícil de conseguir con las membranas reabsorbibles, por lo que al utilizar estas membranas se recomienda colocar material de injerto bajo ellas. 19 La literatura no muestra diferencias estadísticamente significativas entre el empleo de membranas reabsorbibles y no reabsorbibles en general, 20,21 aunque está publicado un mayor volumen de regeneración ósea con membranas no reabsorbibles alrededor de implantes colocados post-exodoncia.…”