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At least 955 records · Page 53Linked to original sources
PubMed1975

Tandem concept in the nonextraction treatment of class II malocclusion.

1. A systematic controlled nonextraction approach in the treatment of certain Class II malocclusions exhibiting arch-length deficiencies has been presented. 2. Clinical cases, diagnostic criteria for case selection, the biomechanics of this tandem force system, time sequence in tooth movement, and ways to avoid untoward sequelae have also been offered. 3. The major advantages in utilizing the basic extraoral appliance and auxiliary mechanisms are as follows: A. various groups of tooth movements are initiated in one or more areas of both dental arches simultaneously. B. Orthodontic pressures are within physiologic limits. C. A minimum number of bands is required. D. Positive control of anchorage is ensured. E. Class II mechanics is not necessary. 4. In each of the four cases presented, the anteroposterior and mediolateral changes that occurred resulted in an increase in the linear length and width of the maxillary and mandibular dental arches. A sufficient increase in the maxillary apical base was also noted and may prove to be a significant yardstick in measuring the stability index of each case. 5. Photographic and cephalometric evaluation revealed that the facial contour and the relative position of the mandibular incisors were not adversely affected.

Adolescent↗
PubMed1976

Management of impacted canines.

In this article an overview of the problem of impacted canines has been presented and some of the clinical considerations related to surgical management and types of attachments have been discussed. In the orthodontic management of impacted canines the clinician has to make certain decisions regarding one-arch vs. two-arch treatment and canine vs. first premolar extraction. The factors which might influence such decisions were also discussed.

Bicuspid↗
PubMed1982

The adaptive value of dental crowding: a consideration of the biologic basis of malocclusion.

Malocclusion, an ambiguous concept that refers to structural disharmony of the teeth and jaws, can be defined only in reference to normal occlusion. If normal occlusion is synonymous only with ideal occlusion, then normal occlusion becomes a rare occurrence. A biologically valid concept of normal occlusion includes a range of variation in the relevant occlusal variables that is compatible with health and unimpaired function. The difficulty in defining malocclusion is the determination of the point at which normal variation becomes abnormal. A clearer concept of malocclusion is obtained if the occlusal variables that it comprises are considered. Dental crowding is endemic among technologically advanced populations and uncommon in primitive groups. The significant elements in the development of most dental crowding are mesial migration and the lack of interproximal attrition. Mesial migration of the posterior teeth provides the functional replacement for the tooth surface lost to attrition because of the rigors of a primitive diet. In modern man there is little attrition of the teeth because of a soft, processed diet; this can result in dental crowding and impaction of the third molars. It is postulated that the tooth-jaw size discrepancy apparent in modern man as dental crowding is, in primitive man, a crucial biologic adaptation imposed by the selection pressures of a demanding diet that maintains sufficient chewing surface area for long-term survival. Selection pressures for teeth large enough to withstand a rigorous diet have been relaxed only recently in advanced populations, and the slow pace of evolutionary change has not yet brought the teeth and jaws into harmonious relationship.

Adaptation, Biological↗
PubMed1984

Electrocautery in orthodontics.

Electrocautery has all but disappeared from the clinical dental setting. Through technical advances, there have been developed new instruments which must now challenge the profession to re-examine the use of electrocautery as a valuable adjunct, particularly in the field of orthodontics. This article will describe a simple yet effective battery-operated electrocautery unit. Indications and examples of its use will also be presented.

Electrocoagulation↗
PubMed1985

Activator headgear therapy.

A method of treatment is described using an activator and cervical headgear simultaneously to correct malocclusions of the Class II, Division 1 type. The case reports of ten treated patients are used to demonstrate the effects of the application of this technique. Changes in the dentition and facial skeleton were analyzed and the significance of the different responses to the application of the same appliances assessed. The hypothesis proposing that a simultaneous application of both appliances may result in a number of desirable effects greater than that induced by each individual appliance is examined. The hypothetical basis for the application of this technique is partially substantiated by the clinical observations. Within a period of about 1 year, correction of the Class II molar occlusion to a Class I molar occlusion is obtained, with a simultaneous reduction of overbite and overjet. Skeletal changes were found to be variable and related to facial type and the rate of facial growth. Brachyfacial and mesofacial types responded most favorably to treatment. The most favorable effects were observed when there was a large quantitative mandibular growth and brachyfacial or mesofacial growth pattern. In dolichofacial types with a slow mandibular growth rate, mandibular rotation was found to be clockwise; cervical traction appears contraindicated, and a combination of activator with occipital medium to high pull is considered more appropriate.

Activator Appliances↗