What Is the Effect of Maxillary Impaction Orthognathic Surgery on Voice Characteristics? A Quasi-Experimental Study.

Background: Regarding the impact of orthognathic surgery on the airway and voice, this study was carried out to investigate the effects of maxillary impaction surgery on patients' voices through acoustic analysis and articulation assessment.

Methods: This quasi-experimental, before-and-after, double-blind study aimed at examining the effects of maxillary impaction surgery on the voice of orthognathic surgery patients. Before the surgery, a speech therapist conducted acoustic analysis, which included fundament frequency (F0), Jitter, Shimmer, and the harmonic-to-noise ratio (HNR), as well as first, second, and third formants (F1, F2, and F3).

A Rare Case of Orthokeratinized Odontogenic Cyst (OOC) in the Posterior Mandible of a Young Adult 18-Year-Old Boy.

Orthokeratinized Odontogenic Cyst (OOC) is a rare odontogenic cyst, which is important because it has a low recurrence potential, but it has a percentage of the potential for malignant changes. OOC characteristics can be different from OKC (odontogenic keratocyst), which was once classified in its category. The microscopic view of OOC cyst is the reason for its easy identification from OKC, the orthokeratinized epithelial covering and the clear granular layer, and the hyperplasia of the basal layer, and the smooth surface of this cyst.

A viable method to replace the metal trocar drill guide in the inaccessibility of the long sagittal drill for mandibular fixation in BSSO.

The bilateral sagittal split osteotomy requires many specific instruments. Many of them are not used by any surgical team other than the maxillofacial surgery team. The absence of some of these materials makes it practically impossible to perform or continue the operation, with a negative impact on the outcome.