Er ,Cr:YSGG LASER vs Diode LASER Biomodulation on Bone Surrounding ALL-on-4 implants Supporting Hybrid Immediately Loaded Maxillary Prostheses

Abstract

This study was performed to evaluate the effect of Er,Cr:YSGG LASER biomodulation on the bone loss around All-on-4 implants immediately loaded with hybrid prostheses. Fourteen patients were selected to share in this study from the out-patient clinic of prosthodontic department, Faculty of Dentistry, Ain-shams University.  Patients were randomly divided into two equal groups.  Patients received four implants placed according to the All-on-4® concept.  Surgical radiographic guides fabricated from the dual scan imaging technique were used to guide implant placement. Group A:  Sequential drilling was done in a regular manner.  Then osteotomy site was biomodulated using Er,Cr:YSGG (2790nm) LASER with a radial firing tip. Group B:  Sequential drilling was done in a regular manner.  Then osteotomy site was biomodulated using diode (Medium InGaAsP) class IV LASER with wave length 940 nm.  Stability of the implants was measured using Osstell to ensure immediate loading was possible.  Provisional hybrid prostheses were delivered to the patient on the day of surgery.