We have studied the structure and stability of the ionic Li ? Xe n and neutral LiXe n (n = 1-35) small clusters. The potential energy surface of the ionic cluster is described using additive potentials, which represent the pair interactions taken from the best available coupled cluster ab initio calculations. The V Li ? Xe and V Xe-Xe potentials have been fitted by Tang and Toennies and Lennard-Jones (LJ) forms, respectively. The structure of LiXe n neutral clusters have been investigated using a model potential and ab initio calculations. We have used the Li ? Xe potential in its ground state and fitted to the Tang and Toennies formula. The LiXe n optimized geometry is, then, used for one electron self consistent filed calculation of the only alkali valence electron interacting with the Li ? Xe n cluster. In order to determine the geometry of Li ? Xe n and LiXe n clusters and their isomers, the potential energy surface has been explored by the Monte Carlo basin Hopping method. Their relative stability was studied by evaluating the energy and the energy differences as function of number n of Xenon atoms in clusters. It was shown, for Li ? Xe n , that n = 4, 6,10,14,16,18,20,22,24, 26, 28 and 30 are the most stable structures.

Odontomas are a type of mixed odontogenic tumor made up of mineralized ectomesenchymal tissue. Odontomas are divided into two categories by the World Health Organization: complex and compound. They are commonly observed in regular radiography tests and can be caused by a variety of factors. They are, however, rarely linked to impacted teeth. Through a clinical case report, this study attempts to highlight the clinical and histological aspects of this rare dental tumor. In the present case report, a 28-year old male patient visited with a complaint of impacted anterior tooth and swelling. After a thorough clinical and radiological examination, it was decided to excise the growth by curettage. On histological investigation, the tissue was diagnosed with complex odontoma. One-year follow-up of the case revealed excellent healing with no sign of recurrence.