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At least 1,099 records · Page 61Linked to original sources
PubMed1981

The desirability of using radiopaque plastics in dentistry: a status report. Council on Dental Materials, Instruments, and Equipment.

Radiopacity in dental plastic materials is desirable. Currently, only radiopaque composite restorative materials and one temporary crown material are commercially available. Developments in incorporating radiopacity in other dental polymeric materials should be encouraged. Also, research should be conducted to quantify and standardize radiopacity both in materials and their clinical utilization. No requirement of radiopacity is currently included in any ANSI/ADA Specification applicable to dental plastic materials. However, standard test methods (ASTM Standard F640-79) have been established for radiopacity of plastics for medical use. The Council on Dental Materials, Instruments, and Equipment recommends that appropriate subcommittees of the American National Standards Committee MD156 develop, as quickly as possible, requirements and appropriate test methods to be placed in future revisions of standards covering plastics in dentistry.

Contrast Media↗
PubMedDate not supplied

Reinforced practice of children's cooperative behavior during restorative dental treatment.

A reinforced practice procedure was employed to teach cooperative behaviors to two 36-month-old children undergoing restorative dental treatment. The children were rewarded with temporary escape, praise, and stickers for practicing the use of cooperative behavior in the presence of the sights, sounds, and some of the sensations of the dental instruments, before the actual dental treatment. Observations of four classes of disruptive behavior during treatment indicated that baseline levels of disruptive behavior, typically greater than 95 percent, were reduced by more than 70 percent, following several practice visits. These changes were acceptable to the dentist--and to his assistant, who rated the children as more cooperative and less anxious.

Anxiety↗
PubMed1995

Clinical management of the avulsed tooth.

Treatment outside the dental office: Replant immediately after gentle washing if practical. If replantation is not practical, store the tooth in the best medium available. Storage media in order of preference are Hank's Balanced Salt Solution (HBSS), milk, saline, and saliva (buccal vestibule). Water is the least desirable storage medium. Treatment in the office: Emergency visit; Place tooth in HBSS while exam is conducted and history is taken. Prepare socket for gentle repositioning of the tooth. Prepare the root. Extraoral dry time < 20 minutes: Closed apex--replant immediately after gentle washing. Open apex--soak in 1 mg doxycycline in 20 mg saline for 5 minutes. Extraoral dry time 20 to 60 minutes: Soak in HBSS for 30 minutes and replant. Extraoral dry time > 60 minutes: soak in citric acid, 2% stannous fluoride, and doxycycline and replant. Endodontics can be done extraorally. Semirigid splint for 7 to 10 days. (If alveolar fracture is present, rigid splint for 4 to 8 weeks). Suture soft-tissue lacerations, particularly in the cervical area. Administer systemic antibiotics (penicillin V potassium if possible) Chlorhexidine rinses and stringent oral hygiene while the splint is in place (7 to 10 days). Analgesics as required. Second visit after 7 to 10 days: Endodontic treatment: Tooth with open apex and extraoral dry time of < 60 minutes: No endodontic treatment initially. Recall every 3 to 4 weeks to examine for evidence of pathosis. If pathosis is noted, disinfect the pulp space and start apexification procedure. Tooth with open apex and extraoral dry time > 60 minutes: If endodontics was not completed in the emergency visit, start endodontics and follow apexification procedure. Tooth with closed apex: Endodontics should be initiated after 7 to 10 days. Careful chemomechanical instrumentation under strict asepsis. Splint removed at end of visit. Obturation visit: If endodontics was initiated 7 to 10 days after the avulsion, obturation can take place after short-term calcium hydroxide treatment. If endodontics was initiated more than 14 days after the avulsion or inflammatory resorption, long-term calcium hydroxide for 6 to 24 months, obturated when an intact lamina dura is traced. Restorations: Temporary restorations: Should be 4 mm deep. Reinforced zinc-oxide-eugenol, acid-etch composite resin, glass-ionomer cement. Permanent restoration: Placed immediately after obturation. Acid-etch resin and dentin bonding agents. Follow-up care: Twice per year for 3 years and yearly for as long as possible. Late complications are common.

Dental Restoration, Permanent↗
PubMed2000

Immediate loading of implants in partially and fully edentulous jaws: a series of 27 case reports.

BACKGROUND: The concept of immediate loading of dental implants has been researched in animal and man. High predictability with titanium screw implants can be expected under certain circumstances. Delayed loading, which is empirically based, may offer roadblocks to success in the complex case. Micromotion under a denture, retention of compromised teeth, and the necessity for multiple implant surgeries complicate the situation. The present study was undertaken to demonstrate whether in partial and fully edentulous patients, titanium screw implants may be installed and loaded within 72 hours. METHODS: The study included 27 jaws (23 mandibles and 4 maxillas) in patients who refused to wear a denture or were told of the possibility of immediately loading their implants. Criteria similar to delayed loading was utilized. The patient had to have adequate volume and density for a minimum of 4 (10 mm) implants in the mandible and 6 in the maxilla, in addition to other requirements. After a thorough presurgical evaluation by the restorative dentist, a template and heat-cured/metal-reinforced provisional were fabricated. Following fixture installation, either the fixed provisional was placed or an impression was taken, and the provisional was seated within 72 hours. Once the temporary was placed, it remained until osseointegration was complete. RESULTS: Success rates similar to those in delayed loaded cases may be expected (95%). Fewer sandblasted/acid-etched titanium screws were lost than machined titanium screws. All patients went on to completion of their original prosthetic prescription. CONCLUSIONS: Patients who are partially or fully edentulous may predictably be restored with fixed implant prostheses immediately upon fixture placement if certain parameters are met.

Aged↗
PubMed2005

Direct restoration of worn maxillary anterior teeth with a combination of composite resin materials: a case report.

Tooth loss, alterations on tooth structure, and reduced vertical dimension are known to severely compromise the stomatognathic system. This case report describes the treatment of a patient who presented with an extremely worn maxillary anterior dentition with a loss of posterior support owing to the loss of almost all the posterior teeth, except the mandibular premolars. Provisional removable partial dentures were used to create an optimum maxillomandibular relationship and to provide restorative space prior to the restoration of the remaining teeth. This restoration was accomplished with a combination of layered hybrid and microfilled composite materials, which restored the maxillary anterior teeth to optimum esthetics and function.

Bisphenol A-Glycidyl Methacrylate↗
PubMed1997

Diagnosis and treatment of the cracked tooth.

This review paper discusses the recognised factors which predispose to cracked-tooth syndrome. In addition, common presenting symptoms and the various methods to aid clinical diagnosis of this problem are examined. The incidence of the condition is reported and the prognosis of the various forms of fracture, as suggested by clinical presentation, are outlined with reference to the available literature. Benefits and relative demerits of traditional and more modern treatment options are presented and recommendations made for future research.

Cracked Tooth Syndrome↗
PubMed1997

A clinical trial of all-ceramic crown restorations: status, fall 1995.

Although porcelain-fused-to-metal (PFM) restorations are the most widely used full-coverage crown restoration systems, their inherent properties make the achievement of natural aesthetic restorations an elusive task. In contrast, the all-ceramic system (IPS Empress, Ivoclar North America, Amherst, NY) offers excellent translucency and vitality, without the opacity associated with PFM restorations. Its vitality is further enhanced by an adhesive resin cementation method that conducts the color of the underlying tooth structure. This article reports the status of a 5-year investigation, initiated in 1992, of the clinical performance of the IPS Empress all-ceramic system and the resin cementation system used with it.

Adolescent↗
PubMed1985

Temporization techniques in fixed prosthodontics.

Temporary restorations are very important during the construction of final restorations. The success of the final restoration often depends on a well-made temporary. This article reviews the requirements, materials, and techniques available to the profession for temporary restorations.

Composite Resins↗
PubMed2000

Water-enhanced crystallization of leucite in dental porcelain.

OBJECTIVE: The purpose of this study was to determine whether long-term exposure of dental porcelain to saliva during temporary cementation of a porcelain-fused-to-metal (PFM) restoration could enhance leucite crystallization if the restoration is refired. Such water-enhanced leucite crystallization in dental porcelains could lead to porcelain-metal thermal incompatibility problems. METHODS: Six commercial dental body porcelains and the Component No. 1 (leucite-containing) frit of the Weinstein et al. [13] patent were studied. For each porcelain, 30 coupon specimens were randomly assigned to a treatment group. Ten specimens were placed in artificial saliva, 10 in distilled water, and 10 in a desiccator and were stored for six months. At the end of the six months, an additional 10 coupons of each porcelain were prepared to serve as a control. All 40 specimens of each porcelain were randomized and subjected to one additional firing. Leucite weight fraction was determined by quantitative X-ray powder diffraction analysis via an internal standard technique. RESULTS: Comparisons among the treatments via the least-squares-means test-adjusting for porcelain showed that the saliva group mean leucite weight fraction was significantly higher than that of the other groups. The change in porcelain thermal expansion that would be associated with a leucite change in this range would be between 0.2 x 10(-6) K-1 and 0.3 x 10(-6) K-1. SIGNIFICANCE: The results of this work constitute the first demonstration that moisture absorbed by a porcelain can act as a glass modifier and enhance the crystallization of the glass during subsequent firing. The effect was sufficiently large to generate thermal expansion changes that would exceed the maximum safe mismatch between porcelain and metal.

Absorption↗