Mitsuhiro Osada

The influence of different types of hard-palate closure in two-stage palatoplasty on maxillary growth: cephalometric analyses and long-term follow-up.

Using cephalometric analysis we investigated the influence on maxillary growth of two different types of hard-palate closure in two-stage palatoplasty. In 12 patients with complete unilateral cleft lip, alveolus, and palate, the lip and soft-palate were closed between 3 and 7 months of age. These 12 patients were then assigned to two groups of 6. In one group the hard palate was closed at 1 year 5 to 11 months of age by a vomer flap with a skin graft (VF group, Osadas two-stage palatoplasty) and in the other group it was closed by the mucoperiosteal pushback procedure (PB group). Sella-nasion-point A (SNA) in the VF group at 3 to 4 and after 10 years of age were within normal range and significantly larger than in the PB group. Two patients in the PB group required orthognatic surgery to obtain normal occlusion and a well-balanced profile. We concluded that in two-stage palatoplasty better maxillary growth can be obtained using the vomer flap method than using the pushback procedure.

Attempt to obtain greater dermal depth of vascular injury using dye-enhanced laser technique: A new approach

Although pulsed dye laser has been successfully used in the treatment of portwine stains, a number of patients had incomplete clearance because the depth of penetration by the pulsed dye laser was inadequate. This study was performed to establish the greater penetration depth of vascular injury using a dye‐enhanced laser technique.

Experience of the treatment of melanin deposit benign cutaneous pigmented lesions with PLDL-1

Benign cutaneous pigmented lesions have been treated by many conventinal methods,such as dry ice therapy,dermabrasion or laser therapy.But such conventinal methods sometimes resulted in hyperpigmentation or scarformation. A 510nm dye laser with pulse duration of 375nsec (PLDL-1) was used to treat 3lpatients with benign cutaneous pigmented lesions. Skin lesions were nevi spilus,senile lentigines,nevocellular nevi,and traumatic tattoo. 74%cases were effective by this laser treatment,and no hyperpigmentation or scarformation was seen in all cases. This laser was very easy to treat and was thought to be useful for superficial cutaneous pigmented lesion treatment.

Possibility of Treating Hyperpigmented Skin Lesions Using the Nd: YAG Laser

The authors have developed a ruby laser system having a device to provide uniform output, the “Kaleidoscope” handpiece. This equipment can be used for the treatment of a hyperpigmented skin lesions, such as nevus spilus and nevus cell nevus. As a result, acceptable clinical results have been obtained*. However, the ruby laser was not effective for the treatment of deeply located intra-dermal hyper-melanoses.