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Biomedical subjects

G V Newman

Publications and source records attributed to G V Newman.

At least 19 recordsLinked to original sources
PubMed1995

Adhesion promoters, their effect on the bond strength of metal brackets.

There are occasions where it is desired to increase the bond strengths of no-mix adhesives. Noncompliant patients and hypocalcified and fluorosed tooth enamel require higher bond strengths than usually obtained. It was the purpose of this investigation to study the effects of adhesion promoters to increase bond strengths. In vitro shear bond strengths that use the Instron machine (Instron Corp., Canton, Mass.) and thermocycling methods indicate the bond strengths of a no-mix adhesive bonding 80 gauge metal mesh brackets can be significantly improved through the following techniques: control (MPa 9.0), sandblasting (MPa 10.8), sandblasting and silanating (MPa 11.9), Rocatec system (MPa 10.8), Kulzer "silicoating" (MPa 13.2), and adhesion promoters--Megabond--(MPa 13.3). These adhesive promoters have been and are clinically being tested with promising results.

Adhesiveness↗
PubMed1994

A longitudinal study of the effects of surgery, radiation, growth hormone, and orthodontic therapy on the craniofacial skeleton of a patient evidencing hypopituitarism and a Class II malocclusion: report of a case.

Facial growth is an important factor for the orthodontists in the timing of treatment of the patient with a Class II malocclusion who has a potential for retarded growth. This patient had an isolated idiopathic growth hormone deficiency and hypothyroidism and was treated during a circumpubertal growth spurt in two phases. The first phase involved a functional appliance and the second was accomplished with fixed appliances. The case report affords one of the rare opportunities to document and analyze the multifactorial effects of surgery, radiation, growth and thyroid hormones, and orthodontic treatment on the craniofacial growth of a patient evidencing a Class II, Division 1 malocclusion (retrognathic mandible). Hand-wrist, panoramic, cephalometric radiographs, dental, and skeletal height and weight measurements are employed. Six-year posttreatment dental and craniofacial skeletal changes and management problems are presented as well.

Activator Appliances↗
PubMed1979

Treatment of compromised teeth: a multidisciplinary approach.

Treatment for uprighted abutment teeth that may have infrabony pockets can be considered complete when the following criteria are met: 1. The uprighted tooth is in its proper vertical axis. 2. There is a significant decrease in soft-tissue pocket depth. 3. Crestal leveling is evident radiographically. 4. Adequate space has been created to accommodate a pontic (minimally 6.5mm). The advantages of employing this orthodontic-periodontal technique are as follows: 1. Leveling of the osseous crest fosters pocket elimination obviating the necessity for removal of a great deal of supporting bone. Concomitantly, a significant decrease in pocket depth usually eliminated the need for periodontal surgery. 2. The resulting occlusal forces are placed in favorable axial inclinations. 3. There is an improved crown-to-root ratio, since the uprighted and extruded tooth is reduced to the level of the occlusal plane. This reduction is sufficient to improve considerably the prognosis of a questionable abutment tooth. 4. A pontic space is created for an esthetic and properly contoured pontic. 5. Parallelism is attained, so that the marginal integrity is more easily accomplished. 6. The orthodontic procedures are relatively uncomplicated, efficient, and esthetic, provided there is little or no lower anterior crowding. 7. The restorative dentist has a proper abutment tooth with a good prognosis for prosthesis.

Adult↗
PubMed1977

Transposition: orthodontic treatment.

Case reports of three brothers, a father, and cousin portray a genetic influence relative to transposed teeth, congenitally missing teeth, and pershaped incisors. Orthodontic treatment, the associated problems, and the appliance used in treatment were discussed.

Cuspid↗
PubMed1976

Open-bite relapse. Report of a case.

Although the tooth positioner was initially helpful in promoting improved esthetics and stability, it in effect became an orthodontic appliance by maintaining the original, treated occlusal plane. Subsequently, the lower third molars erupted above the occlusal plane and caused the mandible to rotate downward and backward, resulting in an unsightly bite opening. Removal of the etiologic factors, the tooth positioner, and third molars corrected the open-bite relapse.

Child↗