The effect of short-term tooth intrusion on human pulpal blood flow measured by laser Doppler flowmetry

Ikawa, Motohide; Fujiwara, Masaru; Horiuchi, Hiroshi; Shimauchi, Hidetoshi

doi:10.1016/s0003-9969(01)00049-8

Cited by 44 publications

(43 citation statements)

References 18 publications

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“…It involves directing laser light through the enamel and dentin toward the pulp; some of the light may be reflected and Doppler-shifted by moving erythrocytes. 18 Pulpal responses to orthodontic forces have previously been investigated [19][20][21][22][23][24] ; however, few studies have evaluated the reaction of dental pulp to the orthopedic forces created by RME. Kayhan et al 25 and…”

Section: Introductionmentioning

confidence: 99%

Pulpal blood flow changes due to rapid maxillary expansion

Babacan

Doruk

Bıçakçı

2010

The Angle Orthodontist

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Objective: To determine the pulpal blood flow (PBF) changes in anchorage teeth associated with the high forces of a rapid maxillary expansion (RME) appliance. Materials and Methods: The study was performed with 14 girls and 7 boys for a total of 21 patients between 10 and 15 years of age (mean, 13.1 6 1.39 years). A modified acrylic bonded RME appliance was used as an expansion appliance. Laser Doppler flowmetry was used for the pulpal perfusion measurements. Records were taken from 42 upper central incisors, 28 canines, and 42 first molars at the following time intervals: just before expansion (T1); at the first week of expansion (T2); at the end of the expansion process (T3); and at the third (T4), seventh (T5), and 12th weeks of retention (T6). The data gained were statistically evaluated by parametric tests. Results: PBF values of the anchorage teeth were doubled at the first week of expansion; however, these values began to decrease because of separation of the median palatal suture. PBF values tended to reach their initial values during the retention period. Pulpal perfusion changes of all examined anchorage teeth were similar to each other from the beginning to the end of the evaluation. Conclusion: PBF changes that occur with RME are reversible. (Angle Orthod. 2010;80:1136-1140

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Section: Introductionmentioning

confidence: 99%

Pulpal blood flow changes due to rapid maxillary expansion

Babacan

Doruk

Bıçakçı

2010

The Angle Orthodontist

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“…An increase in pulpal temperature can be affected by dentin thickness, 8,11,14 duration of light exposure and the type of light-curing device used in the curing process. 4,9,12 The pulpal blood flow rate changes in many clinical situations, such as local anaesthesia, [15][16][17] trauma to the tooth, [18][19][20][21] orthodontic movement [22][23][24] and age [18]. Many composite restorations are placed under these circumstances.…”

Section: Introductionmentioning

confidence: 99%

Parameters Influencing Increase in Pulp Chamber Temperature with Light-curing Devices: Curing Lights and Pulpal Flow Rates

Park

Roulet

Heintze

2010

Operative Dentistry

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©Operative Dentistry, 2010, 35-3, 353-361 S-H Park • J-F Roulet • SD Heintze Clinical RelevanceBecause increase in temperature is related directly to light intensity and exposure time, curing devices with high power density (>1200 mW/cm 2 ) should only be activated for a short time (<15 seconds), even in teeth without cavity preparation. SUMMARYThis laboratory study examined the effects of curing lights with different light intensities and changing flow rate on the increase in pulpal temperature during the light curing process and the rate of the subsequent decrease in temperature after the termination of light curing.The tip of a temperature sensor was positioned on the pulpal dentinal wall of the buccal side of the maxillary premolar. Metal tubes were inserted in the palatal and buccal root of the tooth, one for water inflow and the other for water outflow. The tubes were connected to a pump to control the flow rate. The water flow rate was set to 4.2 µl/minute, 28 µl/minute or 70 µl/minute. At each flow rate, the unprepared tooth was light cured from the buccal side 1 mm from the buccal surface, using four different curing lights. The temperature data were recorded and stored on a computer every second for three minutes. The curing lights that were used were: Astralis 10 (QTH high , Ivoclar Vivadent), Bluephase 16i (LED conv , Ivoclar Vivadent) and two experimental LED-curing lights (LED exp2000 , LED exp3000 , Ivoclar Vivadent Clinical Implication: Because the increase in temperature is directly related to the light intensity and exposure time, curing devices with high power density (>1200 mW/cm 2 ) should only be activated for a short period of time (<15 seconds) even in teeth without cavity preparation. The flow rate had only a negligible effect on the temperature increase.

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“…The influence of external loads on the blood flow in the dental pulp of human teeth treated with fixed and removable orthodontic appliances was evaluated in short-time studies [26,27]. The effect of brief and continuous intrusive forces on human pulpal blood flow of upper left central incisors was also measured with LDF [28,29].…”

Section: Introductionmentioning

confidence: 99%

Changes in gingival blood flow during orthodontic treatment

et al. 2010

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AbstractThe aim of the study was to investigate the changes in gingival blood flow due to orthodontic forces. Eleven volunteers, with the maxillary canine in an ectopic position were tested. A Laser Doppler Flowmeter (LDF) with a gingival probe was used, registering both the blood flow and temperature of the gingivae. After baseline measurement, a fixed orthodontic appliance was bonded. Measurements were repeated monthly, after activation of the appliance. The study lasted 6 months. The baseline value was 338.7 ± 201.56 P.U. [Perfusion Unit (mean ± S.D.)] which decreased to 218.9 ± 74.83 P.U. (p < 0.05) after two months and the final value of 363.9 ± 194.86 P.U was not significantly different from that initially (p > 0.5). The results showed that application of a force of 75 g resulted in a decrease in gingival blood flow up to 50%, but this returned to previous values after a few months. The study supports this measurement technique as a useful tool for monitoring gingival blood flow in long-term studies as well.

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The effect of short-term tooth intrusion on human pulpal blood flow measured by laser Doppler flowmetry

Cited by 44 publications

References 18 publications

Pulpal blood flow changes due to rapid maxillary expansion

Pulpal blood flow changes due to rapid maxillary expansion

Parameters Influencing Increase in Pulp Chamber Temperature with Light-curing Devices: Curing Lights and Pulpal Flow Rates

Changes in gingival blood flow during orthodontic treatment

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