Potensi kombinasi kitosan arginylglycylaspartic acid dengan periodontal ligament cell sheet terhadap perlekatan jaringan periodontal klinis studi ex vivo pada macaca nemestrina dengan kerusakan tulang alveolar horizontal = Potential of combination of chitosan arginylglycylaspartic acid with periodontal ligament cell sheet on clinical periodontal attachment ex vivo study in macaca nemestrina with horizontal alveolar bone defect