الفهرس 
Comparison Between Immediate & Delayed Implant Palcement Following Splitting And Grafting by (HA) for Atrophic Anterior Maxilla (Clinical & Radiographic Study)
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Abstract
6Aim of the study: The purpose of this study was to compare the survival rate of immediate & delayed placement of dental implants, following narrow maxillary ridge splitting & grafting by an alloplastic material. Materials and methods: The present study was conducted on 6 patients using 16 implants. The patients were divided randomly into 2 groups, group I patients: eight sites were subjected to maxillary ridge splitting(anterior region), ridge grafting with Hydroxyapatite and delayed placement of total number of eight implants while group II patients: Eight sites were subjected to maxillary ridge splitting, ridge grafting with Hydroxyapatite followed by immediate placement of total number of eight implants. Preoperative, immediate (one week), 3 months and 6 months post-expansion and insertion CBCT radiographs assessed for measuring the bucco-lingually width. Results: During the follow up period, all patients showed no post-operative complications, Wound healing was uneventful in all patients, without any signs of wound dehesince or infection, All implants inserted were stable, which was detected by the periotest. The CBCT radiograph showed proper contact between bone and implant,also showed increase buccolingual width for both groups immediately post-operative and decrease in the width 6 months post-expansion and insertion. The gained results denoted that there was statistically significant increase in alveolar ridge width after one week, followed by statistically insignificant increase after 3 months, while, after 6 months in group II patients there was statistically insignificant decrease in the alveolar ridge. Whereas, group I patients had shown statistically significant increase in alveolar ridge width after one week, followed by insignificant decrease after 3 months followed by statistically insignificant decrease after 6 months.The net change (preoperative-6 months) of alveolar ridge width in control group was statistically significantly lower than that of the study group