Hyung-Gon Kim

Total alloplastic temporomandibular joint reconstruction combined with orthodontic treatment in a patient with idiopathic condylar resorption

This case report describes the successful treatment of an adult patient with skeletal Class II open-bite malocclusion secondary to idiopathic condylar resorption. Total alloplastic joint reconstruction and counterclockwise rotation of the maxillomandibular complex combined with orthodontic treatment provided a satisfying outcome with maximum functional and esthetic improvement.

Oxygen related luminescence center in CaS:Bi3+ phosphor☆

Abstract A new luminescence center in CaS:Bi3+ phosphor has been observed. The origin of this center was studied and found that it is related to oxygen incorporated in CaS host structure.

Heat Exchanger Method (HEM) grown GaAs single crystals and their homogeneity

GaAs single crystals, 32 mm in diameter and 32 mm in length, were grown by the heat exchanger method (HEM). A 〈111〉 seed crystal was used with helium gas for the heat exchanger. The optimum conditions for single crystal growth were determined to be growth time of 8.5 h, growth rate less than 4 mm/h and a helium flow rate smaller than 23.6 l/min. The Hall effect was measured by the Van der Pauw method about the radial and axial directions. From this measurement the homogeneity was known, and the Hall mobility and carrier concentration at room temperature were found to be 4580 cm2/V·s and 3.5×1016 cm-3, respectively. An EPD measurement was made to investigate the crystal quality. The value was 2×103 cm-2 at the center, but increased toward the edge to a value of 1×104 cm-2.

Reconstitutions totales des articulations temporo-mandibulaires par des implants alloplastiques combinées à un traitement d’orthodontie dans un cas de résorption condylienne idiopathique

This case report describes the successful treatment of an adult patient with skeletal Class II open-bite malocclusion secondary to idiopathic condylar resorption. Total alloplastic joint reconstruction and counterclockwise rotation of the maxillomandibular complex combined with orthodontic treatment provided a satisfying outcome with maximum functional and esthetic improvement.

Photoluminescence studies on ZnRich Hg1−xZnxTe single crystals and composition determination

The Zn-rich Hg1−xZnxTe single crystals, i.e., 0.6 < x < 1, were grown by travelling heater method. Photoluminescence studies on the localized intrinsic exciton have been done and an empirical formula determining the composition x in Zn-rich Hg1−xZnxTe is derived subsequently.