Electronic thermography for the assessment of inferior alveolar nerve deficit

Gratt, Barton M.; Shetty, Vivek; Dent, Med; Saiar, Maryam; Sickles, Edward A.

doi:10.1016/s1079-2104(05)80194-5

Cited by 29 publications

(22 citation statements)

References 8 publications

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“…As inflamed tissue is characterised by liberation of heat, thermography has been used to detect inflammation after the surgical removal of mandibular third molars 4,19 and to detect nerve injuries. 10,13,14 Moreover, a higher skin temperature on the affected side has been shown in a patient with Frey's syndrome. 25 The main limitation of thermography is the method's inability to detect temperature changes far from the surface of the body.…”

Section: Discussionmentioning

confidence: 97%

“…The method has been used for multiple purposes within medicine [1][2][3] and in the field of dentistry. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] An inflammatory process is characterized by heat production and emission as one of the cardinal symptoms, which is why thermography may be used to evaluate inflammation. Many studies have been performed on the use of thermography in the diagnosis of temporomandibular joint disorders 5,6,9,11,12,15,16 and diagnosis of nerve injuries after surgery or trauma, 10,13,14,17 as well as within clinical research.…”

Section: Introductionmentioning

confidence: 99%

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Thermography as a quantitative imaging method for assessing postoperative inflammation

Christensen

Matzen²,

Væth³

et al. 2012

Dentomaxillofacial Radiology

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Objective: To assess differences in skin temperature between the operated and control side of the face after mandibular third molar surgery using thermography. Methods: 127 patients had 1 mandibular third molar removed. Before the surgery, standardized thermograms were taken of both sides of the patient's face using a Flir ThermaCam TM E320 (Precisions Teknik AB, Halmstad, Sweden). The imaging procedure was repeated 2 days and 7 days after surgery. A region of interest including the third molar region was marked on each image. The mean temperature within each region of interest was calculated. The difference between sides and over time were assessed using paired t-tests. Results: No significant difference was found between the operated side and the control side either before or 7 days after surgery (p . 0.3). The temperature of the operated side (mean: 32.39 u C, range: 28.9-35.3 u C) was higher than that of the control side (mean: 32.06 u C, range: 28.5-35.0 u C) 2 days after surgery [0.33 u C, 95% confidence interval (CI): 0.22-0.44 u C, p , 0.001]. No significant difference was found between the pre-operative and the 7-day postoperative temperature (p . 0.1). After 2 days, the operated side was not significantly different from the temperature pre-operatively (p 5 0.12), whereas the control side had a lower temperature (0.57 u C, 95% CI: 0.29-0.86 u C, p , 0.001). Conclusions: Thermography seems useful for quantitative assessment of inflammation between the intervention side and the control side after surgical removal of mandibular third molars. However, thermography cannot be used to assess absolute temperature changes due to normal variations in skin temperature over time.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Thermography as a quantitative imaging method for assessing postoperative inflammation

Christensen

Matzen²,

Væth³

et al. 2012

Dentomaxillofacial Radiology

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“…Inconsistent changes in skin temperature in clinical neuropathic conditions have been reported (e.g. increased (Gratt et al, 1995) or decreased (Kang et al, 2003)) even in the same condition (e.g. diabetic neuropathy (Boyko et al, 2001; Nabuurs‐Franssen et al, 2002)).…”

Section: Discussionmentioning

confidence: 99%

Intact cutaneous C fibre afferent properties in mechanical and cold neuropathic allodynia

Hulse

Wynick

Donaldson

2010

European Journal of Pain

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Patients with neuropathy, report changes in sensory perception, particularly mechanical and thermal allodynia, and spontaneous pain. Similar sensory changes are seen in experimental neuropathies, in which alteration in primary afferent properties can also be determined. The neural correlate of spontaneous pain is ongoing activity in sensory afferents. Mechanical and heat allodynia are thought to result from lowered activation thresholds in primary afferent and/or central neurones, but the mechanisms underlying cold allodynia are very poorly understood.We investigated nociceptive behaviours and the properties of C and A fibre intact afferents running adjacent to damaged afferents following a partial ligation injury of the saphenous nerve (PSNI). Animals developed mechanical and cold allodynia by 3 days after PSNI. Intact mechanosensitive C fibre afferents developed ongoing activity, and had slower conduction velocities 3 and 7 days following nerve injury, with no change in mechanical threshold. There was a large increase (∼46-fold) in calculated afferent input 3 days after nerve injury, as a result of the ongoing activity in these fibres. Mechano-cooling-sensitive C fibre afferents showed both enhanced cooling-evoked firing, and increased ongoing activity. The afferent barrage associated with mechano-cooling-sensitive afferents was increased 26-fold 7 days after nerve injury. We observed no differences in the properties of intact A fibre mechanosensitive afferents.These studies demonstrate for the first time that the altered nociception seen after PSNI is associated with ongoing activity and enhanced cooling-evoked activity in intact C fibre afferents in the saphenous nerve, with no concurrent alteration in A fibre afferents.

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“…Canavan et al studied a group of mildto-moderate temporomandibular joint disorder (TMD) subjects and found that DT values are correlated with the level of pain in the subjects [149]. Gratt et al reported that, IRT of chin is an effective method to diagnose inferior alveolar nerve (IAN) deficit [150]. They reported that, subjects with IAN deficit have a mean DT value [32].…”

Section: Dental Diagnosismentioning

confidence: 99%

Medical applications of infrared thermography: A review

Lahiri

Bagavathiappan

Jayakumar

et al. 2012

Infrared Physics & Technology

990

610

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The primary objective of this study is the development of transparent thin film materials in the IR enabling strong infrared absorption of organic compounds in the vicinity of metal nanoparticles by the surface plasmon effect. For developing these optical micro-sensors, heterostructures combining gold nanoparticles and chalcogenide planar waveguides are fabricated and adequately characterized. Single As 2 S 3 and Ge 25 Sb 10 Se 65 amorphous chalcogenide thin films are prepared by radiofrequency magnetron sputtering. For the fabrication of gold nanoparticles on a chalcogenide planar waveguide, direct current sputtering is employed. Fabricated single layers or hetero-structures are characterized using various techniques to investigate the influence of deposition parameters. The nanoparticles of gold are functionalized by a self-assembled monolayer of 4-nitrothiophenol. Finally, the surface enhanced infrared absorption spectra of 4-nitrothiophenol self-assembled on fabricated Au/Ge-Sb-Se thin films hetero-structures are measured and analyzed. This optical component presents a ~24 enhancement factor for the detection of NO 2 symmetric stretching vibration band of 4-nitrothiophenol at 1336 cm −1 .

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Electronic thermography for the assessment of inferior alveolar nerve deficit

Cited by 29 publications

References 8 publications

Thermography as a quantitative imaging method for assessing postoperative inflammation

Thermography as a quantitative imaging method for assessing postoperative inflammation

Intact cutaneous C fibre afferent properties in mechanical and cold neuropathic allodynia

Medical applications of infrared thermography: A review

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