Ultrasound in Dentistry

[Anonymous]

Ultrasound can be used for Diagnostic and therapeutic purposes. Diagnostic ultrasound further divided as –conventional and Doppler variety. Due to their superficial location, parotid and submandibular glands are easily visualized by ultrasonography although the deep portion of the parotid gland is difficult to visualize because the mandibular ramus lies over the deep lobe. Solid benign lesions present as well circumscribed hypoechoic intraglandular masses. Ultrasonography can demonstrate the presence of an abscess in an acutely inflamed gland, as well as the presence of sialoliths which appear as echogenic densities that exhibit acoustic shadowing.
Conventional type used in salivary glands helpful to diagnose Recurrent parotitis in children, Hypertrophy, Acute inflammation, Chronic inflammation, tumors (intranodular, extra nodular), Sjogren`s syndrome. Inflammatory conditions involving masseter muscle, Lymph node (size, shape), Tongue-tumors, Cervical masses, congenital lesions like brachial cyst, Thyroglossal cyst, Cystic hygroma. Inflammatory changes like cervical abscess, cervical cellulites, cervical phlebitis, benign tumors like haemangioma, Fibroma, Lipoma, Nerve tumors, malignant tumors. Thyroid gland inflammation and malignant neoplasm arising from them. In Parathyroid gland primary hyperparathyroidism, secondary hyperparathyroidism. Akizuki etal showed application in Bone thinning, erosion, expansion, facial bone fracture.
In maxillary sinus imaging, to study normal sinus, chronic inflammation, sinus filled with fluid, tumor or scar. Temporomandibular joint internal derangement can be detected as given by Rudiger Emshoff etal in 1997.
Doppler ultrasonography used to study vascular changes in salivary gland diseases & condition
Intranodal structure & blood vascularity in lymphnode, Hemangioma –to know the feeding artery, infected abscess wall & periostium in osteomylitis. Other Therapeutic applications are Physiotherapy-healing of soft tissue injuries, Vericose ulcers, burns, Oncology-thermal effects of high frequency ultrasound causes tissue ablation.
Recent advances include High frequency, fast computer, 3D used for intravascular ultrasound Intraductal probes and Skin scanning, Guidance of biopsy & aspiration techniques.

        

[sushantpatel_doc]

Ultrasound in the dentistry before CVDentus Tips.

The ultrasound was introduced in dentistry about 50 years ago, when it was discovered that it was able to cut the dental material with the aid of an abrasive slurry composed of aluminum oxide. During the decade of 1950 dentists uncovered the following advantages of the dental cavity preparation with ultrasound:

· cutting of the tooth with very light pressure;
· absence of pain in the majority of the procedures;
· absence of harmful effect on the pulp;
· precision of cut and excellent quality of finishing.

However, in the decade of 1960 the dental cavity preparation with ultrasound was abandoned due to the inconvenient use of the abrasive slurry and the relatively low cutting speed. It was surpassed by the high cutting efficiency of the high speed turbines, more adjusted for a dentistry of invasive concept, based in the preventive extension and retentive preparations.

From then on, the ultrasound started to be used as accessory in processes of cleanness and asepsis, as tartar removal, periodonty and endodonty, or in processes that needed the high ultrasound energy, as in the condensation of inlays/onlays and the removal of bolts and crowns. Great part of the dental doctor’s offices have ultrasound equipment for use in one or more of these applications.

The advantages of the dental cavity preparation with ultrasound, as described above, are in accordance with the necessities of the modern dentistry, in which the concepts of maximum preservation and minimum restoration are fundamental. However, to be efficient more adequate tools are necessary to eliminate the necessity of the abrasive slurry.

Some ultrasound companies supply some conventional diamond tips to use in their equipment, which are recommended only for minimally invasive cavity preparations.

CVDentus is the only technology that enables extensive use of ultrasound in dental cavity preparation.

        

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