Computer-assisted fabrication of orthodontic appliances: considering the possibilities

Article Abstract:

A computer-controlled machine can partially automate the production of orthodontic appliances. The technician places orthodontic wires and retaining screws on the surface of a dental cast and mounts the cast on the machine. The machine generates a three-dimensional computer model of the cast to help the technician develop a mental image of the appropriate appliance. Using a computer mouse, the technician draws the desired type and shape of the appliance over the graphic images of the dental cast. The machine applies liquid acrylic to small sections of the cast until the appliance is formed. Each section is cured under ultraviolet light to a solid state. Because the machine applies the proper amount of acrylic, the need for manual trimming is minimized. Automated production reduces time and labor, improves working conditions, and allows dentists to compare pre- and post-treatment computer images of dental casts to evaluate orthodontic treatment.

Innovations, Design and construction, Computer-aided manufacturing, Computer aided manufacturing

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Implementing adjunctive orthodontic treatment

Article Abstract:

Limited orthodontic treatment may benefit some patients who require restorative dental care. Extracted or missing teeth may cause other teeth to drift out of alignment. Temporary use of limited orthodontic appliances can realign and redistribute the space around these teeth, which enables them to support a fixed bridge. People with an under- or oversized tooth may have abnormal spacing between their teeth. Limited orthodontics may redistribute the space and deemphasize the size difference between neighboring teeth. Misaligned teeth in the front of the mouth can be straightened with limited orthotics before the placement of porcelain veneers or crowns. This eliminates the need for major tooth reduction or oversized restorations that can damage the root canals or compromise periodontal health. In addition to facilitating conservative and esthetic restorations, limited orthodontic treatment may eliminate plaque pockets to improve oral health.

Oral surgery

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Accidental orthodontic elastic band-induced periodontitis: orthodontic and laser treatment

Article Abstract:

The improper placement of orthodontic elastic bands can injure the gums and cause tooth loss, often requiring surgical treatment. Two cases describe severe tooth-loosening, infection, bone recession and soft-tissue damage caused by improper use of bands. Saline irrigation, argon laser debridement and antibiotics successfully eliminated the bacteria and damaged tissue, and orthodontic care resumed with good results. Laser surgery offers a less invasive alternative to traditional flap surgery.

Health aspects, Causes of, Periodontal disease, Periodontal diseases, Stretch fabrics, Elastic fabrics

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