ABSTRACT
Surgery to expose the anterior occiptocervical junction (OCJ) is exacting, and optimal approaches are debatable. The close proximity of vital structures and difficult surgical access present a unique challenge to treat lesions in this area. Routine access to the upper anterior cervical spine remains limited. The authors present a modified retropharyngeal approach and instrumentation in order to resect an exceptionally rare atypical rhabdoid teratoid tumor involving the craniovertebral junction. The technical aspects of this approach in anatomical perspectives are discussed in this article.
ABSTRACT
Osteoma is a benign osteogenic tumor, which is characterized the slow-growing proliferation of compact or cancellous bone. The etiology of the lesion is not well established. Among the hypotheses, the following are related: a traumatic factor, infectious processes, or true neoplasm due to the origin of cartilaginous cells. It can present at any age, usually in young adult individuals, with equal prevalence in both sexes. The clinical characteristics of the peripheral osteoma are represented by slow asymptomatic growth, which leads to swelling and, thus, facial asymmetry. When it is related to the mandibular condyle, this growth can cause functional impairment, such as malocclusion, temporomandibular joint dysfunction, and even limited mouth-opening owing to ankylosis.
Subject(s)
Mandibular Neoplasms/surgery , Mandibular Reconstruction , Osteoma/surgery , Female , Humans , Mandibular Condyle , Mandibular Neoplasms/complications , Middle Aged , Osteoma/complications , Temporomandibular Joint Disorders/etiologyABSTRACT
To assess the stability of mandible position after orthognathic surgery for correction of class III skeletal malocclusion. Twenty adult males, aged 18 to 40 years, with Angle class III skeletal malocclusion underwent preoperative orthodontic treatment for elimination of dental compensations followed by combined maxillomandibular surgery with rigid internal fixation. Lateral cephalograms from each patient, obtained in the natural head position before surgery, immediately after surgery, and at 6-month follow-up, were retrieved from the files of the Pontifical Catholic University of Rio Grande do Sul outpatient Oral and Maxillofacial Surgery clinic and compared. Comparison of craniometric landmark measurements showed that the precision of mandibular setback was compromised in the horizontal plane, with a mean mandibular relapse of 37.75% at point B and 45.85% at point Pg. Improved intercuspation and adaptation of the musculature to the new position of the jaws after orthognathic surgery lead to counterclockwise rotation of the mandible, ultimately displacing the mandible more anteriorly than desired.
Subject(s)
Malocclusion, Angle Class III/surgery , Orthognathic Surgical Procedures/methods , Postoperative Complications/etiology , Adolescent , Adult , Cephalometry/methods , Follow-Up Studies , Humans , Male , Postoperative Complications/diagnosis , Recurrence , Treatment Outcome , Vertical Dimension , Young AdultABSTRACT
A meta deste estudo retrospectivo foi analisar os dados dos registros de pacientes atendidos com traumatismos dentários na Disciplina de Traumatologia de FOP-UFPel/RS, durante os anos de 1988-2001. Foram levantadas as seguintes variáveis em 274 prontuários: gênero, idade, etiologia, local de ocorrência, número de dentes envolvidos, dente comprometido e o tipo de lesão. A relação masculino/feminino encontrada foi de 2,46:1 com um total de 630 dentes traumatizados, sendo que 80% dos pacientes tinham menos de 21 anos de idade
