الفهرس 
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Abstract
This study was conducted to evaluate the crestal bone loss radiographically around implant placed in maxillary Kennedy’s class I by Osseo densification technique with and without diode laser bio modulation.
Fourteen patients were selected from the out-patient clinic of Oral and Maxillofacial Prosthodontic Department, Faculty of Dentistry, Ain Shamsto participate in this study. Maxillary Kennedy classes I with the upper first premolars the last standing abutments bilaterally opposing fully dentate mandibular arch.
Patients were randomly divided by special computer software into to two groups: seven patients at each group.
group I:
Patients of this study were rehabilitated with maxillary implant assisted partial denture with two implants placed at first molar region bilaterally through osseodensification technique using densah bur.
group II:
Patients of this study were rehabilitated with same treatment as for group I followed by LASER biomdulation of the osteotomy by semiconductor diode (medium In Ga Asp) class IV LASER with wave length 940 nm for 40 s. LASER application was repeated at 2, 4, 6,8,10 and 12 days postoperatively.
The crestal bone loss was evaluated during the follow up recall visits through 6,9,12 months after loading. Calibration was done by the digital paralleling periapical radiograph radiographic. Recall appointments were scheduled for all patients 6,9,12 months after loading for assessment of crestal bone loss using digital parallel periapical radiograph.
The results of this study showed:
For both the studied groups significant bone height changes during all the recall intervals which within the normal range of marginal bone loss (1.2mm in the first year) in posterior maxilla as reported in the literature.
Comparing the two groups favorable bone height changes was detected in group II (Laser biomodulation group) which was statically significant at the end of the one year follow up period.