These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: [Effects of the localized thermal enhancement on new bone formation following mechanical expansion of the rat sagittal suture]. Author: Ogawa H. Journal: Nihon Kyosei Shika Gakkai Zasshi; 1990 Dec; 49(6):485-96. PubMed ID: 2133695. Abstract: The purpose of this study was to investigate the effects of localized thermal enhancement on new bone formation in rats. Sixty four male Wistar rats of 52-day old were used as the experimental animal. The sagittal suture of the rat was expanded with the force of 75 g by means of an expansion appliance. After the force application for 2 days, the expansion appliance was fixed with a composite resin. The infrared ray was applied to the expanded sagittal suture for 20 minutes a day and the temperature, just above the sagittal suture, was measured with a biothermometer. The local heat was given for 5-days. The experimental animals were divided into 4 groups based on the increase of temperature: Control, 1 degree C, 2.5 degrees C and 4 degrees C groups. The sagittal suture of each rat was examined by both light and fluorescent microscopies. And histochemistry for acid phosphatase and tartrate-resistant acid phosphatase (TRAP) were performed. The results obtained were as follows: 1) In control and 1 degree C groups, little reaction of acid phosphatase and TRAP were observed in the sutural tissue except for the marrow and the neighboring area of the capillary vessels. 2) In 2.5 degrees C and 4 degrees C groups, an increased absorptive area of the bone and an active reaction of acid phosphatase were found in the sutural area. 3) In only 1 degree C group, an increased new bone formation was evident in the sutural area. Results obtained suggested that the degree of new bone formation depended on the temperature of tissues concerned.[Abstract] [Full Text] [Related] [New Search]