Comparison of pulpal blood flow in dog canine teeth determined by the laser Doppler and the 133xenon washout methods

Kim, Sungpyo; Liu, M.; Markowitz, Kenneth; Bilotto, G.; Dörscher-Kim, J.

doi:10.1016/0003-9969(90)90189-h

Cited by 47 publications

(14 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many authors have found that perfusion changes estimated with LDF compare with those obtained through 133 Xe washout (22,31,32), and this was confirmed in the present study, where both subcutaneous and skin LDF correlated with 133 Xe washout from a subcutaneous depot during prolonged whole body cooling. In fact, 133 Xe washout was more closely related to cutaneous than to subcutaneous LDF perfusion.…”

Section: Discussionsupporting

confidence: 89%

“…Eleven lean and eleven obese age-matched (22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39) Heart rate was recorded online using a three-lead ECG, and breathing was monitored by a respiration transducer (Pneumotrace 1130; all ADInstruments, Spechbach, Germany). Finger blood pressure (fBP) was measured continuously using the volume clamp method throughout the experiment (Finapres, Ohmeda 2600, Engelwood, CO).…”

Section: Atbf and Sbf During Short Maneuvers In Lean And Obesementioning

confidence: 99%

See 1 more Smart Citation

Laser-Doppler flowmetry reveals rapid perfusion changes in adipose tissue of lean and obese females

Wellhöner¹,

Rolle²,

Lönnroth³

et al. 2006

American Journal of Physiology-Endocrinology and Metabolism

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 89%

Section: Atbf and Sbf During Short Maneuvers In Lean And Obesementioning

confidence: 99%

Laser-Doppler flowmetry reveals rapid perfusion changes in adipose tissue of lean and obese females

Wellhöner¹,

Rolle²,

Lönnroth³

et al. 2006

American Journal of Physiology-Endocrinology and Metabolism

View full text Add to dashboard Cite

show abstract

“…The masseter muscle was ascertained by the naked eye. The LDF values obtained in this way represent the blood flow in the superficial vessels of the masseter muscle (8,22). Electrical calibration for zero blood flow was performed for all recordings.…”

Section: Methodsmentioning

confidence: 99%

Inhibitory effects of excess sympathetic activity on parasympathetic vasodilation in the rat masseter muscle

Ishii¹,

Niioka²,

Watanabe³

et al. 2007

American Journal of Physiology-Regulatory, Integrative and Comp

View full text Add to dashboard Cite

The present study was designed to examine the effect of sympathetic tonic activity on parasympathetic vasodilation evoked by the trigeminal-mediated reflex in the masseter muscle in urethane-anesthetized rats. Sectioning of the superior cervical sympathetic trunk (CST) ipsilaterally increased the basal level of blood flow in the masseter muscle (MBF). Electrical stimulation of the peripheral cut end of the CST for 2 min using 2-ms pulses ipsilaterally decreased in a dependent manner the intensity (0.5-10 V) and frequency (0.1-5 Hz) of the MBF. The CST stimulation for 2 min at <0.5 Hz with 5 V using 2-ms pulses seems to be comparable with the spontaneous activity in the CST fibers innervating the masseter vasculature, because this stimulation restored the basal level of the MBF to the presectioned values. Parasympathetic vasodilation evoked by electrical stimulation of the central cut end of the lingual nerve in the masseter muscle was markedly reduced by CST stimulation for 2 min with 5 V using 2-ms pulses in a frequency-dependent manner (0.5-5 Hz). Intravenous administration of phentolamine significantly reduced the vasoconstriction induced by CST stimulation in a dose-dependent manner (0.1-1 mg/kg), but pretreatment with either phentolamine or propranolol failed to affect the sympathetic inhibition of the parasympathetic vasodilation. Our results suggest that 1) excess sympathetic activity inhibits parasympathetic vasodilation in the masseter muscle, and 2) alpha- and beta-adrenoceptors do not contribute to sympathetic inhibition of parasympathetic vasodilation, and thus some other types of receptors must be involved in this response.

show abstract

“…One of the major draw backs of this technique is that measurement results can not be expressed in absolute units but must instead be giv en in arbitrary units based on the calibration of the machine in a zero reflectance and a standard motility solution. Nonetheless, the accuracy and reliability of LDF in measuring blood flow in teeth has been confirmed in animal models by comparing the technique with other methods used to measure the perfusion of the dental pulp [2,3]. Clinical applications of LDF in dentistry have been primarily in the area of traumatology, where it has been used to monitor pulp vitality in luxated teeth over time [4,5], A recent study has reported the accuracy of LDF in distinguishing between vital and nonvital teeth [6].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Blood Perfusion in the Dental Pulp with Laser Doppler Flowmetry

Firestone

Wheatley²,

Thüer³

1997

Int J Microcirc

View full text Add to dashboard Cite

The reproducibility of laser Doppler flowmetry (LDF) in measuring the perfusion of the dental pulp was investigated. A second aim was to establish if the LDF signal from the dental pulp can be influenced by physiological stimuli, e.g. postural changes. A third aim was to apply the technique to clinical measurements of pulp perfusion in patients undergoing orthodontic therapy. A custom splint to position the probe was fabricated for 10 subjects, and measurements of pulpal perfusion in the maxillary six anterior teeth were repeated on eight occasions with the subject seated. Further, measurements of the dental pulp perfusion in one tooth were repeated with the subject in a standing and supine position. Mean perfusion (arbitrary perfusion units) for individual teeth varied from 2.7 for a central incisor to 15.5 for a lateral incisor. Perfusion was greatest for lateral incisors and least for central incisors. Pulpal perfusion was significantly higher in a supine than in a standing or sitting position. Initial clinical experience with LDF encourages further investigation of its potential as a diagnostic tool for determining pulp vitality. Preliminary experimental results suggest that LDF will be a valuable source indicating pulpal response to orthodontic therapy with fixed appliances.

show abstract

Comparison of pulpal blood flow in dog canine teeth determined by the laser Doppler and the 133xenon washout methods

Cited by 47 publications

References 6 publications

Laser-Doppler flowmetry reveals rapid perfusion changes in adipose tissue of lean and obese females

Laser-Doppler flowmetry reveals rapid perfusion changes in adipose tissue of lean and obese females

Inhibitory effects of excess sympathetic activity on parasympathetic vasodilation in the rat masseter muscle

Measurement of Blood Perfusion in the Dental Pulp with Laser Doppler Flowmetry

Contact Info

Product

Resources

About