Peter D Wang | PubMed Health

PubMed2002

One-stage maxillary sinus elevation using a bone core containing a preosseointegrated implant from the mandibular symphysis.

This report presents a novel surgical approach of a one-stage maxillary sinus elevation using a bone core containing a preosseointegrated implant harvested from the mandibular symphysis. As a result, the elevation of the floor of the maxillary sinus and the placement of the implant were achieved at the same time, and the required healing time was significantly reduced. Three months after placement of the implant in the symphysis, a bone core containing the implant was retrieved using a trephine. The bone core was placed in the resorbed posterior maxillary ridge, thereby elevating the maxillary sinus floor. The bone core containing the implant was allowed to heal for 5 months, after which the implant was restored and followed up for 30 months. This technique represents a surgical modification intended to avoid the conventional two-step sinus elevation surgery in which the surgical procedure of graft placement is followed by surgical implant placement. This approach requires significantly reduced healing time and provides an increased bone quality around the implant, which is of clinical importance, particularly in the posterior maxilla.

Adult↗

PubMedDate not supplied

Localized vertical maxillary ridge augmentation using symphyseal bone cores: a technique and case report.

Vertical augmentation of the alveolar ridge is intended to restore resorbed alveolar ridges. This procedure is important for the placement of dental implants in a favorable position and also to enhance restoration esthetics. This article presents an approach for vertical ridge augmentation in the anterior maxilla utilizing symphyseal bone cores. A patient presented with 2 localized bony defects around the maxillary lateral incisors. Following extraction of these teeth, vertical bone defects of 7 mm on the right and 6 mm on the left were observed in relation to the cementoenamel junction of the adjacent teeth. Two bone cores were harvested from the mandibular symphysis using a trephine. These bone cores were tapped into 2 predrilled osteotomy sites with corresponding diameters until stabilization was achieved. The 2 sites were grafted with demineralized freeze-dried bone allograft and a titanium-reinforced expanded polytetrafluoroethylene membrane. After 5 months, the membranes were removed and vertical ridge augmentation of 5 mm on the right and 4 mm on the left was observed. The width of the ridge was increased as well. Two implants were placed in favorable positions, restored after 6 months, and followed successfully for 1 year after loading. This technique represents a viable approach for augmentation of deficient alveolar ridges prior to the placement of dental implants.

Adult↗