Cleidocranial dysostosis

a rare condition inherited as an autosomal dominant and characterized esp. by partial or complete absence of clevicles(colar bones), defective occlusion due to missing, misplaced, or supernumerary teeth
source: merriam-webster's medical dictionary 1995 edition

dysostosis

defective formation of bone


source: merriam-webster's medical dictionary 1995 edition