N. Hochman

Skeletal and functional effects of treatment for unilateral posterior crossbite

Unilateral posterior crossbite (UPXB) is a common malocclusion, frequently presenting a lower midline deviation, accompanied by Class II subdivision relationships in final closure and a very high prevalence of the reverse sequencing (RS) pattern of jaw movement. These features often persist even after the elimination of the crossbite. The purpose of the present study was to examine in detail the morphologic, skeletal, and functional effects of the treatment for this malocclusion category. The experimental group consisted of 24 children in the mixed dentition stage with UPXB who were treated with removable expansion plates and a control group of 10 age-matched children with normal occlusion. Longitudinal follow-up revealed a stable dental maxillary arch expansion of at least 1.5 mm but a complete elimination of crossbite in only 50% of the cases. The frequent persistence of Class II subdivision relations and lower midline deviation that were not due to functional mandibular shift was striking. The pretreatment posteroanterior (P-A) cephalograms indicated reduced facial and maxillary widths. After treatment, the achieved maxillary width increase was greater than expected with normal growth. Longitudinal assessment of the mandibular movement response revealed by the electrognathograph showed a high prevalence of RS, which was reduced after treatment. In conclusion, (1) a higher than expected prevalence of skeletal transverse aberrations at the maxillary and zygomatic levels were found in the UPXB group; (2) the removable expansion appliance induces transverse growth of the maxilla; and (3) an inherent pattern of jaw movement is characteristic to the UPXB and does not change significantly with orthodontic treatment.

Hypersensitivity to methyl methacrylate: Mode of treatment☆☆☆★★★

This article describes the treatment of a patient who experienced a delayed hypersensitivity reaction associated with acrylic resin. Patch testing revealed an allergy to methyl methacrylate monomer. Patients with a known or suspected allergy of this type should be treated by alternative methods. Dental procedures in which negligible contact of the oral mucosa with methyl methacrylate are presented.

New all-ceramic indirect post-and-core system☆☆☆

The increasing demand for highly esthetic, biocompatible posts and cores has led to the development of metal-free, post-and-core systems. This article describes and evaluates an indirect method for the fabrication of an all-ceramic post and core.

Esthetic considerations in restoring endodontically treated teeth with posts and cores

Posts and cores are often required for the restoration of endodontically treated teeth. Many methods for making post-and-core reconstructions have been described. With the increased use of all-ceramic systems for esthetic tooth restorations, there is a need for esthetic core reconstructions. This article describes several methods for fabricating esthetic posts and cores.

Alternative method of conservative esthetic treatment for gingival recession

The health and appearance of gingival tissue play an essential role in esthetics. The esthetic function of the tissue is enhanced when it frames the restoration. With gingival recession, the effect of natural gingiva is created with pink composites or ceramics on the cervical part of the crown, as described in this clinical report. This goal depends on the absence of adverse effects on the color, shape, and health of the surrounding tissue. The new composites are more color stable and wear resistant, and the latest generation of dental bonding agents allows the bonding of composites to dentin, various metals, and porcelain. The application of soft-tissue colored composite on dentin cementum, enamel, or porcelain is a good solution for correcting gingival recessions.

Splinting: A retrospective 17-year follow-up study

A retrospective 17-year, longitudinal study monitoring 66 patients with fixed partial denture and removable partial denture restorations revealed that perceptive splinting was beneficial and enhanced the longevity of the restoration. The study discussed the advantages and disadvantages of splinting, the survival rate of splints and splinted teeth, and the importance of oral hygiene and a periodic maintenance program.

The cantilever fixed partial denture: A 10-year follow-up

A 10-year study of patients with cantilever fixed partial dentures suggests that these prostheses can be used for both anterior and posterior replacements. Guidelines for cantilever prostheses are described. Fixed cantilever prostheses are favorable alternatives to certain types of unilateral removable partial dentures. Proper oral hygiene is essential.

Direct core buildup using a preformed crown and prefabricated zirconium oxide post

This article describes a procedure that can produce a post and core in a reasonable chair time during a single session. With a preformed crown for core buildup, and being relatively rapid, this is a fairly simple procedure that has good results.

Cranberry Juice Constituents Impair Lymphoma Growth and Augment the Generation of Antilymphoma Antibodies in Syngeneic Mice

In addition to its nutritional value, cranberry juice has been effective in treating urinary tract infections. Various reports have also demonstrated its potential for inhibiting in vitro growth of transformed cell lines. Here we show that a fraction [nondialyzable material (NDM) of a molecular weight range 12,000–30,000 (NDM 12-30K)] derived from cranberry juice impairs in vitro growth and invasion through extracellular matrix of Rev-2-T-6 murine lymphoma cells. Furthermore, intraperitoneal injection of this fraction at nontoxic doses both inhibits the growth of Rev-2-T-6 tumors in vivo and enhances the generation of antilymphoma antibodies. These findings demonstrate the in vivo efficacy of cranberry components against malignant lymphoma in immune competent hosts.

LAMINATE VENEER PROVISIONAL RESTORATIONS : A CLINICAL REPORT

T h e popularity of porcelain laminate veneers has increased since their introduction in the early 1980s for two reasons: a conservative tooth preparation and impressive esthetics with the ultrathin porcelain laminate veneers retained with resinous cement. 1,2 The laminate veneers can be used to restore stained, fractured, or malformed and malpositioned teeth. 3,4 Reduced chair time, increased patient compliance, economic feasibility, minireal discomfort or sensitivity after treatment, and esthetics have all contributed to their increased use. >a,s Glazed porcelain is a biocompatible and esthetic dental restorative material and the material of choice for laminate veneers. The porcelain etching technique with bonding to a composite cement has been confirmed as an acceptable treatment. 2&6 Some dentists routinely place provisional restorations, whereas others do not, mainly because of time constraints or concern about the durability o f the interim restorations. 7 The need for provisional coverage can be justified because of the patients appearance and occlusion. Provisional restorations may be required to prevent drifting of the prepared teeth and the extrusion o f teeth in the opposing arch. ~,8 Patients with high expectations may not be as willing to tolerate the appearance o f the anterior dentit ion without provisionalization. Various procedures are available to facilitate short-term biologically acceptable interim restorations. Direct and indirect venee r t e c h n i q u e s have been desc r ibed ; t hey use autopolymerizing acrylic resin, 9 visible l ight-curing resin, ~° and composites2 ~ This clinical report describes a technique for provisional restoration that uses a clear plastic vacuform matrix or putty matrix system and a preformed polycarbonate crown. The technique is less time consuming and expensive and has a more esthetic result than other techniques do.