Combined Keratocystic Odontogenic Tumor and Basal Cell Ameloblastoma: A Rare Case Report

Ameloblastoma is an odontogenic tumor with diverse clinical behavior and histomorphologic presentations. Basal cell ameloblastoma are extremely rare variants of ameloblastoma. Keratocystic odontogenic tumor (KCOT) is a distinct form of odontogenic cyst that is considered a benign cystic neoplasm and not a cyst. Co-occurrence of these odontogenic tumors has been rarely reported.This paper reports a 34-year old female patient with a unilocular radiolucency around the crown of a partially erupted third molar that was detected accidentally on a routine radiographic examination. She underwent excisional biopsy with a clinical diagnosis of dentigerous cyst. Histopathologic examination revealed a cystic lesion with criteria of OKC and islands and nests reminiscent of basal cell ameloblastoma and acanthomatous ameloblastoma in the stroma. Follow-up showed no recurrence of lesion to date. Due to the rarity of the lesion, the diagnosis was challenging but altogether we made a diagnosis of keratoameloblastoma with basaloid features

Osteosarcoma of the mandible: A case with a clinical appearance similar to benign lesions

Abstract A 34‐year‐old woman with complaints of mandibular swelling that started 4 months earlier was referred to the Oral Diseases Department. Based on the clinical and radiographic appearance, the primary diagnosis was an intraosseous reactive lesion. However, the result of histopathology indicated osteosarcoma

Distraction osteogenesis for cleft palate closure: A finite element analysis

Background: Current methods of closure of the cleft palate result in the formation of scars and impairment of growth. Distraction osteogenesis (DO) might be an effective means to repair or at least reduce the size of wide clefts. This study investigates the biomechanical aspects of this process. Materials and Methods: DO simulation was applied to reduce the size of a unilateral hard palate cleft on a three-dimensional (3D) model of the maxilla. For the position of osteotomy lines, two different models were assumed, with the osteotomy line on the affected side in model A and on the intact side in model B. In each model, DO screws were placed on two different positions, anteriorly (models A1 and B1) and posteriorly (models A2 and B2). Displacement pattern of the bony island in each of the four models, reaction forces at DO locations, and von Mises stress were estimated. Mesh generation and data processing were carried out in the 3D finite element analysis package (ABAQUS V6.7-1; Simulia Corp., Providence, RI, USA). Results: In model B2, the island moved almost evenly, assuring a more complete closure of the cleft. The most uniform stress distribution was found in model B1. Conclusion: The results suggest that the best positions for the DO screw and the osteotomy line for closure of the cleft palate are posteriorly and on the intact side, respectively