INTRODUCTION:Restoration of atrophic mandible with short implants has revolutionized dentistry. Computer guided implant surgery has been verified to be an established minimally invasive treatment and Photobiomodulation (PBM) has proven to be an effective modality in accelerating post-surgical healing and implant osseointegration. AIM OF THE STUDY:To evaluate the clinical and radiographic outcomes of mandibular overdentures retained by two short implants in combination with two different doses of PBM. MATERIALS AND METHODS: Six completely edentulous patients received two short dental implants (4mm diameter and 7mm length) in canine area. Short implants were inserted via CAD/CAM surgical guide. Patients received 5 PBM sessions immediately after surgery and every 48 hours. Group A (n =6) right side implants received dose of 2.4 J/cm2, and group B (n=6) left side implants received dose 4.8 J/cm2. Implants were loaded after 3 months. Each implant was evaluated at time of initial prosthetic loading and 6 months later for peri-implant probing depth (PIPD), modified gingival index (MGI), and vertical bone loss. Implant stability was assessed at the time of surgery and 6 months after loading. RESULTS: The findings of this study indicate that after 6 months, two short implant retained overdentures showed no biological nor mechanical complications. A minor but significant increase (P < 0.05) was observed in the PIPD after 6 months in both groups. The MGI values were very low. Radiographic evaluation revealed minimal insignificant marginal bone loss (P > 0.05) 0.51+30, 0.38+28 for group A and group B respectively. Implant stability values for group A were almost maintained and there was a slight increase in group B after 6 months. Insignificantly better results were reported with group B. CONCLUSION: Two short implant retained overdenture can be a viable option for atrophic mandibles and PBM dose of 4.8 J/cm2 has a potential positive influence on healing and implants osseointegration.
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