Evaluasi Radiografis Regenerasi Kerusakan Tulang Alveolar Horizontal Menggunakan Kombinasi Kitosan Arginylglycylaspartic Acid dan Periodontal Ligament Cell Sheet (Studi ex vivo pada Macaca nemestrina) = Radiographic Evaluation of Horizontal Alveolar Bone Defect Regeneration Using Combination of Chitosan Arginylglycylaspartic Acid with Periodontal Ligament Cell Sheet (Study ex vivo on Macaca nemestrina).