Kim, Young-Kyun Ridge preservation of the molar extraction socket using collagen sponge and xenogeneic bone grafts. [electronic resource] - Implant dentistry Aug 2011 - 267-72 p. digital Publication Type: Controlled Clinical Trial; Journal Article ISSN: 1538-2982 Standard No.: 10.1097/ID.0b013e3182166afc doi Subjects--Topical Terms: AdultAgedAlveolar Bone Loss--etiologyBone Matrix--transplantationBone SubstitutesCollagenDental Implants, Single-ToothDenture, Partial, FixedFemaleHumansMaleMiddle AgedMineralsMolar--surgeryStatistics, NonparametricTooth Extraction--adverse effectsTooth Socket--surgery