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Biomedical subjects

T P Croll

Publications and source records attributed to T P Croll.

At least 73 records · Page 4Linked to original sources
PubMed1992

Enamel microabrasion: a microscopic evaluation of the "abrosion effect".

Enamel surfaces have been found to acquire a glasslike luster and an exceptionally smooth texture following enamel microabrasion procedures. A commercially available enamel microabrasion compound containing abrasive particles and a mild concentration of hydrochloric acid, when applied by rotary compression, simultaneously abrades and erodes (abrosion) the enamel surface. Human enamel surfaces were evaluated microscopically after routine enamel microabrasion procedures. The results show distinct evidence of enamel surface changes that have been described as the abrosion effect.

Complex Mixtures↗
PubMed1991

Visible light-hardened glass-ionomer cement base/liner as an interim restorative material.

A visible light-hardening, glass-ionomer cement, dentinal base/liner has been used as a dentinal and enamel replacement restorative material for certain lesions in primary teeth. The material has all the advantages of glass-ionomer cements and the additional advantage of rapid hardening by light curing. The procedure for using the material as a restorative material in primary teeth is described, and several cases are documented.

Child, Preschool↗
PubMed1990

Glass ionomers for infants, children, and adolescents.

When practitioners fully understand the nature of the glass ionomer materials and use them within their limitations, their use can improve the quality of restorative dental care for young patients. The materials for young patients can be classified as luting cements, dentin replacement liners and bases, and glass ionomer dentin and enamel restorative material. Future research efforts should be directed toward improving the glass ionomer cement by increasing fracture toughness and wear resistance, decreasing hardening time, and simplifying the sensitive handling technique.

Adolescent↗
PubMed1990

Enamel microabrasion for removal of superficial dysmineralization and decalcification defects.

Enamel surface "dysmineralization" can be defined as a disturbance in formation of the inorganic component of enamel during amelogenesis. Enamel microabrasion, a method of removing certain enamel dysmineralization and decalcification coloration defects, is described. In many cases, with insignificant and unrecognizable loss of enamel, superficial enamel discoloration defects can be permanently eliminated, improving the appearance of treated teeth.

Dental Enamel↗
PubMed1990

Imperceptible bonded composite resin Class III restoration using labial access.

Proper use of modern composite resin materials precludes the need to mask Class III restorations behind residual labial enamel. With the use of micromechanical enamel bonding, chemical adhesion to dentin, and traditional mechanical interlocking, visible Class III composite resin restorations that exactly simulate the color and texture of natural enamel surfaces can be placed. Such imperceptible restorations, when performed properly, can last for many years. This paper details a step-by-step procedure for restoring a Class III carious lesion with composite resin, using labial access and a recently introduced dentinal and enamel bonding agent.

Adolescent↗
PubMed1990

Effect of enamel microabrasion compound on human gingiva: report of a case.

A new material to be used in the procedure of enamel microabrasion has been recently introduced. Because the compound contains hydrochloric acid, the manufacturer recommends many safety precautions, especially use of the rubber dam. This case report documents the effect of the enamel microabrasion compound on the gingiva of one human subject and verifies the need for careful handling of the material.

Adult↗
PubMed1990

Relationship among visible light source, composite resin polymerization shrinkage, and hygroscopic expansion.

Composite resins contract during polymerization, and studies have shown that light-cured composite resins shrink toward the polymerizing light source. The purpose of this study was to investigate differences in the adaptation of composite resin to the axial wall in Class V restorations following light curing from the lingual or facial aspects. Polymerization contraction in relation to hygroscopic expansion of the restoration was also investigated. Results showed no statistically significant differences (P less than .05) in the adaptation of composite resin to the axial wall, regardless of the polymerization technique, the composite resin, or the effects of hygroscopic expansion.

Composite Resins↗
PubMed1990

Dental twinning anomalies: the nomenclature enigma.

Dental twinning results from abnormal events in the embryologic development of teeth. This paper describes the impossibility of assigning precise diagnostic terms, such as germination, fusion, macrodontia, and concrescence, to dental twinning anomalies because the entire course of odontogenesis cannot be witnessed. Traditional nomenclature is reviewed and seven cases that exemplify the principle are presented. Modification of nomenclature to describe dental twinning defects is suggested.

Child, Preschool↗
PubMed1990

Augmentation of incisor width with bonded composite resin: another look.

One of the most gratifying composite resin bonding procedures for patients and dentists alike is closure of unwanted and unsightly interdental spaces. Various methods of performing such bonding have been described. The most modern composite resins are strong, tooth-colored materials that can exactly simulate the appearance of normal tooth structure and reliably stay in place for many years. A method of augmenting the mesiodistal coronal dimension of anterior teeth without mechanical preparation of the enamel described.

Acid Etching, Dental↗
PubMed1990

Repair of defective Class I composite resin restorations.

Composite resin restorations undergo dimensional changes that can eventually result in marginal defects. Unlike silver amalgam restorations, which usually should be completely removed before the tooth is restored again, bonded composite resin restorations can often be repaired. This report demonstrates a step-by-step technique for repairing a defective Class I composite resin restoration with a new application of resin after elimination of the defect. The method has proved successful over the last 8 years.

Composite Resins↗
PubMed1990

Bonded composite resin crowns for primary incisors: technique update.

A technique for restoration of carious primary maxillary incisors with a hybrid visible light-curing composite resin and a dentinal bonding agent is described. Careful use of this technique and the new materials can provide a restoration that is esthetic and resistant to fracture and displacement. The technique requires careful preparation of the operative field and precise handling of the restorative materials. The method is illustrated by the placement of bonded composite resin crowns in a 3-year-old boy.

Child, Preschool↗