الفهرس 
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Abstract
The present study was conducted to evaluate the radiodensitometric effect of low intensity laser therapy on the osseointegration of dental implants through digital radiographs in patients under vitamin C, omega-3 and calcium therapy. The selected thirty patients were ranging in age from 3o-40 years. All patients were chosen to be non-smoker males and free from any systemic diseases. The thirty implants were placed and immediately loaded in the mandibular first molar region of thirty patients which were equally divided into three groups. In the control group, the healing phase was left to progress spontaneously without any intervention, while in the laser group it was augmented with low level laser therapy of wavelength 904 nm in contact mode, continuous wave, 20 mw output power and exposure time 30 sec with a dose 4.7 J/cm2. The patients were subjected to 9 sessions during the first week postoperatively (on 2nd, 4th and 6th days), three sessions per day with (1hour) rest period in-between each session, and in the ultrasound group the patients were subjected to LIPU through an ultrasound device, with intensity of 30 mW/cm2, pulse rate 1:1 ultrasound signals (50٪ duty cycle) and frequency 1 MHz operation frequency and applied for 20 minutes/day. The sessions were repeated for 15 days, 5 sessions per week for a period of three weeks. Patients in all groups were given vitamin C, calcium and omega-3 starting one month preoperatively. The patients of all groups attended the follow up period of six months. All the patients were subjected to digital orthopanographs which were taken immediately after surgery representing the base line radiographs, 1.5 months and 6 months postoperatively. The radiographic assessment was carried out through these periods using Digora software in order to monitor the Changes in bone density along bone-implant interface. The results revealed that there was a statistically significant cumulative effect in bone density along bone-implant interface of all groups per time through the different follow up intervals. Although all groups (laser, ultrasound and control) revealed a statistically significant increase in mean bone density of the three zones during all the follow-up periods, the rate of increase was significantly higher in the laser group where it started earlier and was sustained in the three zones in the laser group when compared to the slower and more delayed increase in bone density in the ultrasound and control groups. While no statistically significance difference was found between Control and Ultrasound groups. The low intensity laser irradiation significantly promoted bone healing surrounding immediately loaded titanium implants. The bone healing process together with osseointegration progressed rapidly in the lased group more than the non-lased group emphasizing the laser’s bio-stimulatory effect.