hossein heidar

Extraskeletal Ewing sarcoma (EES) is an uncommon tumor with low prevalence in the head and neck region. Herein, we report a 13-year-old boy with EES in the temporal region, which was managed by surgery and chemotherapy. The histological characteristics and the clinical manifestations of the lesion and our surgical approach will be discussed as well.

This study sought to assess the effect of low-level laser (LLL) on pain and trismus after impacted mandibular third molar surgery.
This double blind controlled clinical trial was conducted on 40 healthy patients with no underlying disease and impacted mesioangular mandibular third molars with the same level of difficulty. The patients were divided into two groups of intervention and control using block randomization. In the intervention group, LLL was intraoral irradiated to the surgical site 10 minutes after suturing from 1cm distance. Sham laser was used in the control group. The patients were provided with postoperative instructions and were scheduled for visits at two and seven days postoperatively to fill out a questionnaire and for suture removal. Level of pain was determined using a pictorial visual analog scale (VAS) and degree of trismus was measured in millimeters. The data were analyzed using SPSS.
Mouth opening in the laser group was greater than that in the control groupat two days postoperatively, which indicates the efficacy of laser for prevention of trismus. The changes in mouth opening were significant at baseline and at two and seven days postoperatively in the two groups (P=0.000); however, the trend of change was equal in both groups. No significant differences were noted in any variable between patients over and under 24 years of age in the two groups except for the amount of drug intake at two days post-surgery.
The results showed that laser irradiation efficiently decreased trismus and improved mouth opening during the first seven days post surgery. Thus, laser irradiation can shorten the course of recovery after impacted mandibular third molar surgery.

Desmoplastic fibroma (DF) is a rare and locally aggressive intraosseous tumor with unknown etiology. The mandible is the common site of involvement in the maxillofacial region. However, it is believed that DF can arise in any bone of the body. A wide age distribution has been reported for DF occurrence, extending from birth to the sixth decade of life, with a peak incidence at 10 to 19 years of age. In this study, diagnostic and therapeutic management of a 6-year-old girl with a desmoplastic fibroma of the inferior orbital rim and zygomatic buttress are discussed. Cone beam computed tomography (CBCT) revealed a mixed lesion in infraorbital rim, which had ill-defined borders and a straight thick bony septum inside the lesion. It also involved the zygomatic process of maxilla and zygomatic bone. According to radiologic concepts, this rare lesion may mimic fibro-osseous, benign and especially malignant lesions. Regarding different treatment plans, identification of this lesion is essential. Furthermore, presence of coarse and irregular or straight septa along with some imaging criteria for malignant lesions such as destruction of the cortex, periosteal reaction and soft tissue invasion would be helpful to differentiate this lesion from malignant and multilocular benign lesions..