Dental Pulp/pathology; Periodontal Ligament/pathology; Periodontitis/etiology; Pulpitis/etiology; Root Resorption/etiology; Tooth Movement Techniques/adverse effects; Animals; Antigens, CD/analysis; Antigens, Differentiation, Myelomonocytic/analysis; Dental Pulp/immunology; Histocompatibility Antigens Class II/analysis; Laminin/analysis; Leukocytes, Mononuclear/pathology; Leukosialin/analysis; Macrophages/pathology; Male; Microvessels/pathology; Molar/immunology; Molar/pathology; Nerve Fibers/pathology; Periodontal Ligament/immunology; Periodontitis/immunology; Periodontitis/pathology; Pressure; Pulpitis/immunology; Pulpitis/pathology; Rats; Rats, Sprague-Dawley; Root Resorption/immunology; Root Resorption/pathology; T-Lymphocytes/pathology; Ubiquitin Thiolesterase/analysis