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)