Quiste óseo traumático mandibular: reporte de caso y revisión de la literatura / Mandibular traumatic bone cyst: case report and literature review

El Quiste Óseo Traumático de la mandíbula es una cavidad intraósea sin revestimiento epitelial, considerado Pseudoquiste. Ha recibido diversas denominaciones debido a su etiología y patogenia inciertas, como Quiste Óseo Traumático, Quiste Óseo Solitario, Quiste Óseo Idiopático, entre otros. Es una lesión asintomática, que a menudo se diagnostica accidentalmente durante el examen radiológico de rutina, como una radiolucencia unilocular con bordes festoneados cuando está localizado entre las raíces dentarias. Presentamos un caso raro de Quiste Óseo Traumático en la sínfisis mandíbular, identificado radiográficamente, en una paciente de 14 años sin historia clara de trauma, diagnosticado y tratado con éxito.

The Traumatic Bone Cyst of the mandible is an intraosseous cavity without an epithelial lining, considered a pseudocyst. It has received various names due to its uncertain etiology and pathogenesis, such as Traumatic Bone Cyst, Solitary Bone Cyst, Idiopathic Bone Cyst, among others. It is an asymptomatic lesion, which is often diagnosed accidentally during routine radiological examination, as a unilocular radiolucency with scalloped edges when located between the dental roots. We present a rare case of Traumatic Bone Cysts in the mandibular symphysis, identified radiologically, in a 14-year-old patient without clear history of trauma, diagnosed and successfully treated .

The implications of different lateral wall thicknesses on surgical access to the maxillary sinus

Abstract: The objective of this study was to measure the topographic thickness of the lateral wall of the maxillary sinus in selected Asian populations. Measurements were made on the lateral walls of maxillary sinuses recorded using CBCT in a convenient sample of patients attending an Asian teaching hospital. The points of measurement were the intersections between the axes along the apices of the canine, first premolar, and second premolar and along the mesiobuccal and distobuccal apices of the first and second molars and horizontal planes 10 mm, 20 mm, 30 mm and 40 mm beneath the orbital floor. The CBCT images of 109 patients were reviewed. The mean age of the patients was 33.0 (SD 14.8) years. Almost three quarters (71.8%) of the patients were male. The mean bone thickness decreased beginning at the 10-mm level and continuing to 40 mm below the orbital floor. Few canine regions showed encroachment of the maxillary sinus. The thickness of the buccal wall gradually increased from the canine region (where sinus encroachment of the canine region was present) to the first molar region, after which it decreased to the thickness observed at the canine region. The buccal wall of the maxillary sinus became thicker anteroposteriorly, except in the region of the second molar, and thinner superoinferiorly. These changes will affect the approach used to osteotomize the lateral sinus wall for oral surgery and for the sinus lift procedure.

Dimensions for midline and paramidline andibulotomy: a radiographic study in the dentate Thai population.

BACKGROUND: Mandibulotomy is an important surgical approach of the oral cavity, oropharynx, and parapharyngeal space. OBJECTIVE: To provide dimensions for placement of bone cuts for midline (between two central incisors) and paramidline (between lateral incisor and canine) mandibulotomy. MATERIAL AND METHOD: Two hundred and sixteen periapical radiographs with the mandibular anterior teeth of 72 healthy Thai dental patients (30 males, 42 females) were selected. The angles between the long axes of the two central incisors (M) and between the lateral incisor and canine (PM) were bilaterally measured using computerized imaging. The horizontal distances (at crestal, middle, and apical levels) between the roots and the alveolar bone heights of the aforementioned teeth were also measured. RESULTS: The angles between the PM (0.00-9.26 degrees) were less convergent than those between the M (0.00-11.66 degrees) (p < 0.05). The distances between the PM were 0.60-8.03 mm, whereas those between the M were 0.47-6.63 mm (p < 0.05). Mean alveolar bone height is 15.88 +/- 1.72 mm in the canine. CONCLUSION: The paramidline mandibulotomy is done in a wider space than the midline cut and could have a better chance to avoid the extraction of a central incisor and preserve the origin of the genioglossus, geniohyoid, and digastric muscles.

Transarticular C1-C2 screws fixation for traumatic atlanto-axial instability

This is a retrospective study of 11 patients diagnosed with traumatic atlanto axial instability that was treated with transarticular C1-C2 screws but without supplemental posterior wiring. After a mean follow up of 25 months. Ten patients [91%] reported no pain related to their neck, while 1 patient had residual neck pain that was aggravated by neck movement. The overall fusion rate was [91%]: as 10 patients out of 11 patients showed a definite bridging fusion mass on X-rays. In conclusion using posterior C1-C2 fusion by transarticular screws with morselized autograft but without additional wiring for traumatic atlantoaxial instability is associated with excellent clinical and radiological outcomes without the need for external halo immobilization