Assessment Of The Effect Of Er,Cr:YSGG LASER Biomodulation On Bone Surrounding All-On-4 Implants Supporting Hybrid Immediately Loaded 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 stereolithographic 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. Group B:  Sequential drilling was done in a regular manner.  Then osteotomy site was biomodulated using Er,Cr:YSGG (2790nm) LASER with a radial firing tip. .  Stability of the implants was measured using Ostell to ensure immediate loading was possible.  Provisional hybrid prostheses were delivered to the patient on the day of surgery.  In2guide soft-ware was used to measure the height of bone from the abutment occlusal surface to the crest of the ridge to evaluate the bone loss around the implants.  Measurements were done using cone beam CT to evaluate the bone loss around the implants at mid buccal, mid-lingual, distal and mesial immediately, and after six months and one year.  Results showed less bone loss around the implants in the Er,Cr:YSGG group when compared to the conventional group.