A longitudinal study of the survival of interproximal root caries lesions restored with glass ionomer cement via a minimally invasive approach.

The prevalence of gingival recessions and the number of root surfaces exposed to the oral environment both increase with age. In turn, these increases place the older population at increased risk for caries; it is estimated that 23.7% of those over the age of 65 have root caries.

Comparison between incisal embrasures of natural and prosthetically restored maxillary anterior teeth.

Statement Of Problem: The loss of one or more of the incisal embrasures may pose a problem in restoring missing tooth structure. Despite its acknowledged importance in dental esthetics, few researchers have investigated the esthetic impact of incisal embrasures.

Purpose: The purpose of this study was to compare parameters of the incisal embrasures of natural maxillary anterior teeth (ND) with those of prosthetically restored maxillary anterior teeth (PRD) and to compare the resemblance of the prosthetic restoration to natural form.

An alternative approach to the immediate overdenture.

A procedure is described for fabricating an immediate complete overdenture where several teeth retain an interim fixed partial denture (FPD) until the complete denture is finished. Nonessential posterior teeth were first extracted. An interim fixed restoration was fitted to five strategic teeth, and the four maxillary incisors were reduced to the gingival margin.

Condylar guidance: correlation between articular morphology and panoramic radiographic images in dry human skulls.

Statement Of Problem: Several studies have shown the unreliability of recording and reproducing the condylar guidance in semiadjustable articulators.

Purpose: The purpose of this study was to determine the correlation between the anatomic shape of the articular eminence and the corresponding panoramic radiographic image in dry skulls.

Material And Methods: Two metal wires were adapted and fixed to the inner and outer surfaces of the articular eminences in 25 human skulls.

The influence of dentin and/or metal surface treatment on the retention of cemented crowns in teeth with an increased taper.

Objectives: To evaluate the effect of dentin and/or metal surface treatments on retention of cast crowns cemented to preparations with compromised retention.

Methods: Cast crowns (n=105) were fabricated on extracted molars prepared to 40 degrees convergence and standard height. 60 teeth were randomly divided into: (A) cemented with zinc phosphate cement; (B-D) cemented with resin cement (Compolute, 3M) with either no surface treatment (B), dentin etched and bonded (EBS multi, 3M) (C), or dentin etched and bonded, and metal tribochemically treated (Co-Jet, 3M) (D); 45 teeth were randomly divided and crowns cemented with another resin cement (Rely-X Arc, 3M) with either no surface treatment (E), dentin etched and bonded (Single Bond, 3M) (F), or dentin etched and bonded and metal tribochemically treated (G).

The effect of sulcular width on the linear accuracy of impression materials in the presence of an undercut.

Purpose: This study examined the effect of gingival sulcular width, in the presence of an undercut, on the accuracy of dies poured from impressions made with different impression materials.

Materials And Methods: Three polyvinyl siloxanes (Examix, Elite, and Express), one polyether (Permadyne), and one polysulfide (Permlastic) were used to make impressions of six metal dies. The dies were machined to simulate teeth with a chamfer preparation, root convergence, and sulci of varying widths (0.

Effect of different peroxide bleaching regimens and subsequent fluoridation on the hardness of human enamel and dentin.

Statement Of Problem: Bleaching of teeth by "in-office" or "home" bleaching techniques are popular methods of whitening teeth. However, bleaching may reduce the surface hardness of enamel and dentin.

Purpose: The purpose of this study was to evaluate (1) the effect of different concentrations of 2 "in-office bleaching" and 2 "home bleaching" agents applied for different time periods on the hardness of enamel and dentin and (2) the effect of subsequent immersion in a low-concentration fluoride solution on the hardness of bleached enamel and dentin.

Retention, marginal leakage, and cement solubility of provisional crowns cemented with temporary cement containing stannous fluoride.

Purpose: This in vitro study investigated the (1) retention and microleakage of provisional crowns cemented with temporary cements to which stannous fluoride (SnF2) was added, and (2) solubility of these cements.

Materials And Methods: Provisional crowns were constructed of acrylic resin with shoulder preparations for 12 molars. The crowns were luted with Tempbond, Tempbond NE, and Freegenol temporary cements, and also with SnF2 added to these cements.

Correlation between patient satisfaction with complete dentures and denture quality, oral condition, and flow rate of submandibular/sublingual salivary glands.

Purpose: The purpose of this study was to examine the correlation between patient satisfaction with complete dentures and parameters of denture quality, oral condition, and flow rate of the submandibular and sublingual salivary glands.

Materials And Methods: The parameters were evaluated on 50 denture wearers using semiquantitative scales and a recently described submandibular/sublingual saliva collector.

Results: Most patients had a medication-induced reduced salivary flow rate (mean 0.

Observable deviation of the facial and anterior tooth midlines.

Statement Of Problem: It has been recommended that the anterior tooth midline be placed coincidently with the midline of the face (facial midline). The location of the facial midline depends largely on the judgment of the clinician. The amount of deviation between these 2 midlines that is noticeable to the observer has not been fully investigated.

A conservative technique for restoring a tooth affected by interproximal root caries.

The insertion of amalgam through an opening in a matrix band facilitates amalgam condensation, aids moisture control, reduces overhangs, and enables the dentist to achieve an acceptable restoration.

Effect of polymerization under pressure on indirect tensile mechanical properties of light-polymerized composites.

Statement Of Problem: Flaws developed during polymerization of restorative materials cause a decrease in mechanical properties.

Purpose: The aim of this study was to determine the effect of polymerization under pressure on the indirect tensile mechanical properties (stiffness and diametral tensile strength) of several light-polymerized composites.

Material And Methods: Five light-polymerized composites were tested: Brilliant, Z100, TPH Spectrum, Prodigy, and Pertac Hybrid.

Effect of core stiffness on the in vitro fracture of crowned, endodontically treated teeth.

Statement Of Problem: Dentin and core materials that substitute for missing dentin are dissimilar materials. A core material with a lower elastic modulus may deform more under applied stress and therefore result in reduced stress concentration at the core/dentin junction.

Purpose: This in vitro study examined the effect of core stiffness on the fracture resistance and failure characteristics of a crowned, endodontically treated tooth under simulated occlusal load.