177BONE DESTRUCTION PATTERNS IN PERIODONTAL DISEASESThe presence of periodontal osseous lesions is clinically significant in many ways. It relates to the associated loss of tooth support, to the site specificity of periodontal destruction, and to the possibility that ecological niches (deep pockets and furcation involvement) associated with some osseous lesions may represent site-specific risk factors or indicators for disease progression.sabarigirinathandr@yahoo.co.inReview1112021Bone loss,Bone deformity,Bony pocketsP.Sivsankar,C.Sabarigirinathan,H.Gayathri,Vidya Sekhar,L.Srinidhi,S.BalasiddharthSenior Assistant Professor, Tamilnadu Government dental College, Chennai Tamil Nadu India - 600003,Professor and Vice principal, Tamilnadu Government Dental College, Chennai Tamil Nadu India, 600003,Reader, Srivenkataseswara Dental College, Puducheery, India.,Reader, ITS college of dental science and research, Ghaziyabad.India.,Post Graduate Student, Tamilnadu Government Dental College, Chennai, TamilNadu, India 600003,Private practitioner, Chennai-600102, Tamilnadu, Chennai. India