Objective: Our objective is to evaluate the potential of non-linear optics, including multiphoton autofluorescence and second harmonic generation (SHG) microscopy, as a non-invasive imaging modality for the real-time study of radiofrequency-tissue interaction.
Methods: Electra-optical synergy device (ELOS) was used
Selleckchem SRT1720 as the radiofrequency source in this study. The back skin of nude mouse was irradiated with radiofrequency at different passes. We evaluated the effect on skin immediately and 1 month after treatment with multiphoton microscopy.
Results: Corresponding histology was performed for comparison. We found that SHG is negatively correlated to radiofrequency passes, which means that collagen structural disruption happens immediately after thermal damage. After 1 month of collagen remodeling, SHG signals increased above baseline, indicating that collagen regeneration has occurred. Our findings may explain mechanism of nonablative skin tightening and were supported by histological examinations.
Conclusions:
Our work showed that monitoring the dermal heating status of RF and following up the detailed process of tissue reaction can be imaged and quantified with multiphoton microscopy non-invasively in vivo. (C) 2011 Published by Elsevier Ireland Ltd on behalf of Japanese Society for Investigative Dermatology.”
“Objective. The objective of this study was to compare postsurgical neurosensory alteration selleckchem and recovery patterns among different nerve fiber types and orthognathic surgeries by measuring current perception thresholds (CPT).
Study design. CPTs of 186 patients who underwent various orthognathic surgeries this website (Le Fort I or II, bilateral sagittal split [BSSRO] or intraoral vertico-sagittal [IVSRO] ramus osteotomy with or without genioplasty) were measured at 2000, 250, and 5 Hz, assessing 3 different nerve fiber types before surgery and at 3, 6, and 12 months after surgery.
Results. CPTs were highest at 3 months postsurgery and gradually returned to presurgical levels until 12 months postsurgery in most cases.
CPT at 2000 Hz showed the largest amount of increase. Le Fort I and IVSRO caused less neurosensory alteration compared with Le Fort II and BSSRO, respectively.
Conclusion. Our data provide nerve recovery patterns following various orthognathic surgeries that may be applied to evaluating the patient’s severity and recovery of nerve damage. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;111:24-33)”
“Growth of Si, Ge, and, thus, SiGe nanowires (NWs) by catalyzed chemical vapor deposition proceeds at different process conditions, preventing easy realization of axial multijunctions interesting for device realization. In this paper, we propose a common process to obtain both Si, Ge, and alloyed NWs simply by adding HCl in the gas phase.