Effect of peroxide bleaches on fluoride release of dental materials.

Purpose: To investigate the effect of two bleaching agents, 35% hydrogen peroxide (Superoxal) and 10% carbamide peroxide (Opalescence), on the release of fluoride from Ketac-Fil, a glass ionomer cement, Photac-Fil, a glass ionomer/resin hybrid; and Tetric, a resin composite with fluoride.

Materials And Methods: Seven disks (9 x 3 mm) of each material were immersed in Superoxal for 1 hour to simulate an in-office application; seven other disks of each material were immersed in Opalescence 1 hour daily for 7 days to simulate a week of home bleaching regimen; and seven additional disks of each material without bleach served as a control. The disks were kept in deionized water and the water was tested for fluoride released every 24 hours for 14, 21, 28, and 35 days, respectively.

In vivo testing of an experimental endosseous implant design.

Purpose: The purpose of this study was to test a new implant system with apically expanding, double-hinged wing stabilizers in dogs before human testing.

Methods: Twenty-seven HA-coated endosseous implants were placed in five dog mandibles. The implants were placed into function for 12-weeks after a 12-week healing period.

Dimensional stability of two visible light-cured indirect inlay/onlay resin composite materials.

Purpose: To evaluate the dimensional stability over time of two visible light-cured indirect inlay/onlay resin composites.

Materials And Methods: Twenty working dies of a Class II preparation were constructed in type IV die stone from impressions of a master metal die. Working dies were randomly divided into two groups of 10 with Class II resin composite inlays fabricated using Brilliant Dentin (n = 10) and Triad inlay material (n = 10).

Retention of esthetic veneers on primary stainless steel crowns.

The purpose of this study was to ascertain the amount of shearing force necessary to fracture, dislodge or deform the esthetic veneer facings of four commercially available veneered primary incisor stainless steel crowns. The four types tested were: Cheng Crowns, [Peter Cheng Orthodontic Laboratory]; Whiter Biter Crown II, [White Bite Inc.]; Kinder Krowns, [Mayclin Dental Studio, Inc]; and NuSmile Primary Crowns, [Orthodontic Technologies, Inc].

Needlesticks: what to do after it happens.

A needlestick injury can be a frightening and even potentially a life-threatening event. It needs to be treated with compassion and some urgency. The dentist-employer should act with knowledge of the current law and with the desire to do whatever is best for the affected people.

Recall intervals: effect on treatment needs of the handicapped patient: a retrospective study.

The purpose of the retrospective study was to examine the effect of recall intervals on incidence of dental caries in handicapped patients. Data was collected from patient records of a private pediatric dental practice. Variables examined were time of the recall interval, age, race and sex of the patient, handicap, and whether the patient lived in a fluoridated area or not.

Recall intervals: effect on treatment needs: a retrospective study.

The purpose of this retrospective study was to examine the effect of recall intervals on the incidence of dental caries. Data were collected from patient records of a private pediatric dental practice. Variables examined were time of the recall interval, age, race and sex of the patient, and whether the patient lived in a fluoridated area.

Evaluation of the Eyberg Child Behavior Inventory as a predictor of disruptive behavior during an initial pediatric dental examination.

The purpose of this study was to investigate relationships between the Eyberg Child Behavior Inventory (ECBI), a parent rating scale of children's behaviors at home, and children's disruptive behaviors during an initial dental visit. Behaviors of 18 Headstart children, 40 to 55 months of age, undergoing an initial exam were observed. Four possible negative behaviors based upon the North Carolina Behavior Rating Scale (NCBRS), were recorded by two observers for each subject during five phases of an initial dental visit and statistically compared to the total ECBI score and individual answers within the ECBI questionnaire.

Activating a 2 x 4 appliance.

When the long span of wire in a 2 x 4 orthodontic appliance enters a bracket in a nonparallel manner, it develops a couple and tendency for rotation called a moment. The moment of a couple creates inherent equal and opposite Newtonian equilibrium forces not readily sensed clinically. Moments at successive brackets, producing rotations in opposite directions, create equilibrium forces also in opposite directions which are subtractive from each other.

On tooth movement.

Current concepts of clinical orthodontic tooth movement are misleading. Traditionally, these have been described as dependent on force levels and being tipping/bodily in nature. The following is a reevaluation of the relationships between tooth movement and orthodontic mechanotherapy not usually considered when analyzing tooth movement clinically.

Evaluation of occlusion, trauma, and dental anomalies in African-American children of metropolitan Headstart programs.

493 African-American children between the ages of three and four years were examined for evaluation of molar occlusion with frequency of anterior and posterior crossbite, fractured and/or darkened teeth from trauma and dental anomalies in the primary dentition. Overall results from both age groups revealed 90% had a mesial step, 8% a flush and 2% a distal step molar occlusion. Crossbite, either anterior or posterior, occurred in 12% of all children examined.

Simultaneous repair and rebase of a removable partial denture.

A patient presented a unique dental problem: the evulsion of mandibular canines, and the restoration of anterior alveolar bone associated with periodontal disease. A mandibular removable partial denture, bilaterally supported by the canines, premolars, and molar abutments of blade implants, had been worn for more than ten years. The open clasps in the canine areas were irritating the oral tissues, and the space under the anterior saddle of the denture was retaining food.

Bilateral birooted maxillary primary canines: report of two cases.

X-ray examination disclosed bifurcation of both maxillary canine teeth in two unrelated patients, both four-year-old children. All other dental findings were unremarkable and their medical histories were noncontributory. Bifurcation of primary canines is an extremely rare condition.

Development of supernumerary premolars in an orthodontic population.

Seven cases exhibiting supernumerary premolar development were detected during a 2-year period during the routine care of approximately 1,100 orthodontic patients. This 0.64% prevalence is more than twice as high as has been previously reported and represents an occurrence rate of 1 per 157 patients.

Prevention for children and adolescents.

Preventive oral health care for the growing child begins before birth and continues through adolescence. The basic elements of a good preventive program remain the same but the importance of each one changes as the child grows and develops. As the child grows, the parent's role in oral health care changes.

Chlorhexidine as an oral hygiene adjunct for cyclosporine-induced gingival hyperplasia.

Recent advances in surgical technique and chemotherapeutic procedures have greatly increased the survival rates of organ transplantation patients. Of dental importance is the widespread use of the immunosuppressive agent cyclosporine in this special-patient population, a drug that has the potential to cause severe gingival hyperplasia as a side effect. A case is presented illustrating the use of the plaque-inhibitor chlorhexidine as a therapeutic adjunct in possibly arresting this gingival condition.