Relation between insertion torque and tactile, visual, and rescaled gray value measures of bone quality: a cross-sectional clinical study with short implants.

Background: This study assessed the relationship between insertion torque and bone quality evaluated during surgery and in preoperative computed tomographic (CT) images analyzed either visually or by rescaled mean gray values (MGVs). The study also tested the correlation between the clinical and radiographic measures of bone quality.

Methods: The consecutive sample was composed of 45 short implants (4.

Effect of surface topography of implant abutments on retention of cemented single-tooth crowns.

This study investigated whether surface topography affects the retentive strength of cemented full crowns, comparing the effects of standard machined, sandblasted, and grooved implant abutments. Five metallic crowns per abutment type were cast and cemented with zinc phosphate. After 24 hours, the specimens were submitted to a tensile test.

Effect of the number of abutments on biomechanics of Branemark prosthesis with straight and tilted distal implants.

Objective: This study aimed to evaluate the bending moments, and compressive and tensile forces in implant-supported prostheses with three, four or five abutments.

Material And Methods: Ten Pd-Ag frameworks were tested over two master models with: 1) parallel vertical implants, and 2) tilted distal implants. Strain gauges were fixed on the abutments of each master model to measure the deformation when a static load of 50 N was applied on the cantilever (15 mm).

Length of the drilling holes of zygomatic implants inserted with the standard technique or a revised method: a comparative study in dry skulls.

Aim: This study aimed to evaluate the length of the holes drilled for the placement of zygomatic implants using two surgical techniques: the original Brånemark and the Exteriorized (extrasinus) protocols. The most frequent implant length used and position where the implants emerged in the zygomatic bone were recorded.

Materials And Methods: Both surgical techniques for inserting zygomatic implants were performed on the right and left sides of 18 dry adult skulls.

Initial enamel wear of glazed and polished leucite-based porcelains with different fusing temperatures.

This study used the radiotracer method to measure the initial enamel wear caused by low- and high-fusing porcelains after glazing or polishing. It also tested the correlation between enamel wear and porcelain surface roughness (Ra). Surface morphology was assessed by optical microscopy.

Primary stability of turned and acid-etched screw-type implants: a removal torque and histomorphometric study in rabbits.

Purpose: This study evaluated the effect of primary stability on the osseointegration of turned and acid-etched screw implants in a rabbit model.

Materials And Methods: One pair of turned and acid-etched implants (3.75 in diameter, 5.

Fracture strength of endodontically treated teeth with flared root canals and restored with different post systems.

Background: Many post systems are available to clinicians, yet no consensus exists about which one is better in restoring endodontically treated teeth.

Purpose: This study evaluated the fracture strength of teeth with flared canals and restored with two fiber-reinforced resin systems (glass fiber: FRC Postec [Ivoclar Vivadent, Schaan, Liechtenstein]; quartz fiber: D.T.

Bruxism and voluntary maximal bite force in young dentate adults.

Purpose: Bruxism may increase the activity and volume of the masticatory muscles, yet its resulting effect on bite force is controversial. This study evaluated the relationship between voluntary maximal bite force (MBF) and presence of bruxism in 80 dentate young adults (40 men, 40 women, 20 to 38 years old), controlling for sex, body mass index (BMI), and presence of orofacial muscular pain during the MBF measurement.

Materials And Methods: MBF was measured with a compressive load transducer at the first molar region.