ABSTRACT
A CO2 laser (Coherent Medical Model 400) was used to irradiate the gingival tissue of a cynomolgous monkey to determine laser effects on the epithelium and underlying connective tissue. A focal length of 400 mm and a 10-watt power setting at 0.2- and 0.5-second exposure was used. Biopsy results indicated that a 0.2-second duration of CO2 laser irradiation was inadequate to completely de-epithelialize the gingival tissue. A 0.5-second exposure exhibited complete epithelial destruction with little or no disturbance of the underlying connective tissue layer and viable connective tissue 1.0 mm below the impact site.
Subject(s)
Gingiva/anatomy & histology , Gingivectomy/methods , Laser Therapy , Animals , Connective Tissue/anatomy & histology , Connective Tissue/radiation effects , Gingiva/radiation effects , Macaca fascicularis , Male , Time FactorsSubject(s)
Nonodontogenic Cysts/pathology , Palate/pathology , Humans , Male , Maxillary Diseases/pathology , Middle AgedABSTRACT
Squamous odontogenic tumor is a rare, benign, odontogenic lesion. We are presenting the twenty-second case to be reported in the literature and only the fifth case with multiple quadrant lesions. This is the first description of reconstruction with autologous and homologous bone grafts of a discontinuity defect of the mandible resulting from en bloc resection of a squamous odontogenic tumor. Emphasis is placed on the need to consider this rare tumor in the differential diagnosis of ameloblastoma. The correct diagnosis significantly changes the extent of the surgical procedure and may avoid unnecessary morbidity.
Subject(s)
Mandibular Neoplasms/pathology , Maxillary Neoplasms/pathology , Neoplasms, Multiple Primary/pathology , Odontogenic Tumors/pathology , Adult , Ameloblastoma/pathology , Diagnosis, Differential , Humans , Male , Mandibular Neoplasms/surgery , Maxillary Neoplasms/surgery , Neoplasm Recurrence, Local/pathology , Odontogenic Tumors/surgerySubject(s)
Dental Pulp Necrosis/therapy , Dysautonomia, Familial , Adult , Dental Care for Disabled , Humans , Male , Root Canal TherapyABSTRACT
Presented is an unusually severe case of acute necrotizing ulcerative gingivitis (ANUG) in association with systemic lupus erythematosus (SLE), in which the patient was observed to slough a considerable amount of attached gingival tissues and eventually to lose a number of teeth and supporting bone. The usual limited and treatable nature of ANUG is reviewed, and attention is directed to the mechanisms by which SLE and therapeutic amounts of steroids can contribute to the increased severity of the oral disease.
Subject(s)
Gingivitis, Necrotizing Ulcerative/etiology , Lupus Erythematosus, Systemic/complications , Adult , Diagnosis, Differential , Female , Gingivitis, Necrotizing Ulcerative/diagnosis , HumansSubject(s)
Acetates/pharmacology , Adhesives/pharmacology , Cyanoacrylates/pharmacology , Denture Repair , Epoxy Resins/pharmacology , Amines/pharmacology , Animals , Connective Tissue/drug effects , Connective Tissue/pathology , Granulation Tissue/anatomy & histology , Inflammation/pathology , Male , RatsABSTRACT
A study was undertaken to ascertain the microvascular pattern of the collateral circulation of the tongue after unilateral ligation of the common carotid artery. The right common carotid artery was ligated in 25 New Zealand White male rabbits. These animals were killed in groups of five at intervals of an hour, six hours, 24 hours, one week, and two weeks. The vasculature in the head and neck of these animals was flushed with heparinized saline solution and perfused with latex. The results show that circulation was present but signifincatly reduced in the one-hour group, slightly reduced in the six-hour and 24-hour groups, and normal in the one- and two-week groups. This study indicates that the collateral circulation of the tongue is extensive and that a normal vascular pattern returns within a week after unilateral ligation of the common carotid artery.
Subject(s)
Collateral Circulation , Microcirculation/anatomy & histology , Tongue/blood supply , Animals , Carotid Arteries/physiology , Carotid Arteries/surgery , Ligation , Male , Rabbits , Regional Blood Flow , Time FactorsABSTRACT
A case in which a tooth traumatically displaced into the floor of the mouth retained its vitality for 15 years is reported. Although the presence of the tooth and soft-tissue cuff which appeared to represent the original attached gingiva presented a source for complications, no significant pathologic changes were noted. The requirement for a thorough radiographic examination before definitive treatment of maxillofacial injuries is emphasized.
