الفهرس 
ENGLISH ABSTRACTOnly 14 pages are availabe for public view
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Abstract
inferior alveolar nerve anatomical variation increases the vulnerability of lac wvc during surgical procedures. Due to ti© increasing demand far dental surgical rloccdnrus especially implant: ...ment of inferior alveolar nem anatomical variants and dick. prevalence has become it necessity in order to avoid the consequence of the nerve bundle in jury including: traumatic neuroma, peri-implant fibrous tissue formation, bleeding and altered sensation which includes paresthesia, anesthesia, and dysesthesia. high incidence of inferior alveolar nerve anatomical variations was detected in
Egyptians subpopulation.
11 1 Mental loop was detected in 40.7% of the examined nerves with males’ predilection. Mean length was 4.31±1.00mm without significance difference between right and left side and with the longest loop length detected (7.2mm). According to our findings; using 5mm stander safety margin from mental foramen is inapplicable since 77.8% of our cases were having mental loop measurement more than 5mm. Accessory mental foramen was detected in 6.4% of the examined nerves with five cases having more than one AMF. This might explain the failure of anesthesia in mental area. Bifid mandibular canal was detected in 34% of the cases with the forward type the least detected (14.6%) followed by retromlar (7.5%), dental (6.4%) and finally buccolingual I .3%). Trifid bt mandibular canal was detected in 8.7% of the caws. In our study we detect 9 different suypes of tri lid mandibular canals: I -Two retromolar canals 2- Two dela canals forward canals 4- One forward and one inferior.5- One retromolar and one forward