OP-059
Evaluation Of Crestal Bone Level Around Dental Implants Placed In Intraoral Autogenous Bone Block Graft

Çiğdem Karaca, Nuray Er, Ecem Usman

Hacettepe University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Ankara Turkey

Objective: The aim of this study was to evaluate the crestal bone level around dental implants placed in autogenous bone block graft using cone-beam computerized tomography (CBCT).

Material-Methods: Patients who needed alveolar bone augmentation before dental implant surgery were included. The autogenous bone block graft harvested from ramus, symphysis and tuber were used. Patients’ age, gender, reasons of tooth loss, donor site, recipient site, number and localisation of dental implants, intraoperative and postoperative complications, and follow- up period were recorded. The crestal bone level around dental implants were measured using CBCT.

Results: Sixteen patients who underwent onlay bone augmentation were evaluated retrospectively. The mean age was 44.12 years. The mean follow-up period was 2.68 years. The mandibular ramus was the most common donor site (55.6%), followed by symphysis (33.3%) and tuber maxilla (11.1%), respectively. In 62.5% of patients, only lateral, in 18.75% of them, only vertical, and in 18.75% of them, both vertical and lateral bone augmentation were performed. The amount of crestal bone resorption was more than 1.5 mm in 3 patients treated with only lateral bone augmentation in a mean of 2 years follow-up. The same resorption rate occurred in 2 patients treated with both lateral and vertical bone augmentation in a mean of 3.3 years.

Conclusion: The onlay bone augmentation using intraoral autogenous bone graft is reliable and acceptable surgical option before dental implant placement. Wound dehiscence, tuber graft and vertical onlay augmentation are risk factors to maintain crestal bone level around dental implants in follow-up.

Keywords: Autogenous Graft, Crestal Bone Resorption, Onlay Bone Augmentation