EVALUATION OF PRIMARY STABILITY IN IMMEDIATE NON SUBMERGED ROOT ANALOGUE ZIRCONIUM IMPLANTS: A PRELIMINARY STUDY

Abstract

Objective: The aim of the present study was to evaluate the primary stability of immediate, custom made zirconium root analogue implant. Our secondary outcome was to evaluate Marginal bone changes at the day of the implantation, and after 3 months. Patients and methods: This study included 8 immediate implant placements in fresh sockets in esthetic zones using custom made zirconium implants. A Pre-operative CBCT using NewTom-Giano machine (Giona Cefla s.c). was obtained for each patient to get the measurements & dimensions of the un-restorable teeth. Patients were prepped for the procedure under local anesthesia. Atraumatic extraction of the teeth with curettage of the extraction socket was done. The extracted remaining roots were disinfected then mounted on the Identica-Hybrid laser scanner to produce an stl. file of the remaining roots. Then using the “Ceramill” CAD software (Amann Girrbach AG, Herrschaftswiesen, Koblach) to modify the root analogue by adding macro retentive “blebs” on the lateral surfaces of the custom made zirconium implant. Transferring the design to the milling machine (Roland DWX-51D) using “Superfect Zir” and “rainbow TM” zirconium blocks. The implants were subjected to surface treatment using sand blasting method, and then sterilized to prepare for implantation. Patients were recalled after 3 days for insertion; and implantation using tapping technique, to achieve primary stability. The primary stability was measured using the periotest M device as a primary outcome. Standardized paralleling technique was used to assure the seating of the implant inside the socket after insertion, & for evaluation of the marginal bone changes as a secondary outcome. Results: all custome made zirconium implants failled to osseointegrate Conclusion: Within the limitations of this study, the authors could not measure the stability nor the marginal bone changes of custom made zirconium implants.