Radiographic results of osteotome-driven maxillary sinus floor elevation without grafting materials after 17.5 years radiographic evaluation of minimally-invasive sinus grafting.

Background: There is growing evidence that minimally invasive sinus augmentation works without the use of filler materials. This study assessed the bone integration and sinus projection of single-unit implants in the maxilla, which were placed approximately 18 years ago using a modified filler-free osteotome technique.

Methods: Sixteen of the 24 treated patients of a former publication (treatment was performed between 2001 and 2004) were reassessed after a mean implant loading period of 17.

Chairside quadrant rehabilitation: material selection in conditions with limited space.

The significantly faster fabrication technique of chairside restorations with the aid of the Cerec Primemill milling unit makes it possible to restore an entire quadrant in a reasonable amount of time. Furthermore, the procedure described in this article made it possible to use a new type of medium-strength ceramic that achieved a very good esthetic result overall.

The Capacity to Change the Lightness of Discolored Tooth Substrates by Means of Minimally Invasive Restorations: Perception by Dentists, Dental Technicians, and Laypersons.

Purpose: To evaluate the minimal ceramic thickness needed to increase the lightness by one value by means of glass-ceramic restorations perceived by dental technicians, dentists, and laypersons.

Material And Methods: A total of 15 assessment pairs (reference and test samples) were formed using glass-ceramic blocks in four different colors. Each assessment pair was comprised of two underground blocks differing in one value of lightness.

Clinical prospective evaluation of zirconia-based three-unit posterior fixed dental prostheses: Up-to ten-year results.

Objectives: Only a few studies exist, which assess the clinical long-term behavior of all-ceramic FDPs in the posterior region. The aim of the present prospective clinical study was to evaluate the clinical performance of posterior three-unit FDPs manufactured from Y-TZP after a service period up to 10 years.

Methods: 55 patients received 59 three-unit FDPs in the posterior region of the maxilla or mandible.

A three-dimensional morphometric study on the position of temporomandibular joints.

Objectives: To address the controversy, in which indications average value articulation is suitable or to what extent individual registrations, especially using the facebow, should be applied, a quantification of the variability of relevant anatomical landmarks is necessary. The goal of this study was to investigate the mean and natural bandwidth of the parameters describing articulation.

Methods: Significant landmarks were measured on three-dimensional (3D) cone beam computed tomography (CBCT) scans of 120 arbitrarily selected individuals.

Three-unit posterior zirconia-ceramic fixed dental prostheses (FDPs) veneered with layered and milled (CAD-on) veneering ceramics: 1-year follow-up of a randomized controlled clinical trial.

Objective: The aim of this multicenter randomized controlled clinical trial was to test posterior zirconia-ceramic fixed dental prostheses (FDPs) veneered with a computer-aided design/computer- assisted manufacture (CAD/CAM) lithium disilicate veneering ceramic (CAD-on) and manually layered zirconia veneering ceramic with respect to survival of the FDPs, and technical and biologic outcomes.

Method And Materials: Sixty patients in need of one posterior three-unit FDP were included. The zirconia frameworks were produced with a CAD/CAM system (Cerec inLab 3D/Cerec inEOS inLab).

A randomized controlled clinical trial of 3-unit posterior zirconia-ceramic fixed dental prostheses (FDP) with layered or pressed veneering ceramics: 3-year results.

Objectives: The aim of the present pilot study was to test whether or not posterior zirconia-ceramic fixed dental prostheses (FDPs) with pressed veneering ceramic exhibit less chipping than FDPs with layered veneering ceramics.

Methods: Forty patients (13 female, 27 male; mean age 54 years (range 26.1-80.

Fracture resistance of endodontically treated teeth without ferrule using a novel H-shaped short post.

Objective: To evaluate the fracture resistance and failure types of modified H-designed intradental short retention preparation for computer-aided design/computer-assisted manufacture (CAD/CAM) restorations, in cases where no ferrule is possible.

Method And Materials: A combined finite element analysis and in vitro testing was employed. Forty extracted single-rooted premolars were selected and prepared for the following four groups (n = 10 per group): Group A, H-post preparation restored with glass-ceramic crowns; group B, H-post preparation restored with lithium disilicate crowns; group C, endocrowns (negative control group); and group D, 2-mm ferrule preparation and restoration with fiber posts (positive control).

Accuracy of chairside-milled CAD/CAM drill guides for dental implants.

Purpose: To describe a chairside method for producing implant guides based solely on digital data and present a first assessment of in vitro accuracy on plaster models.

Material And Methods: Twenty-four implants were planned and pilot drillings were performed according to a new protocol, which is based on the registration of CBCT and CAD/CAM data. Chairside-milled one-piece drill guides were used to transfer the virtual plan into reality.

Depth determination of artificial periodontal pockets using cone-beam tomography and radio-opaque material: an in vitro feasibility study.

In general, periodontal tissues are clinically assessed using calibrated periodontal probes and radiographs. Due to technical developments and the availability of cone-beam computed tomography (CBCT), 3-D imaging has become feasible and offers some advantages and potential for the evaluation of complex anatomical structures. The present pilot study illustrates and validates the possibility of radiographically visualizing and metrically assessing hard and soft tissue.

Retrospective evaluation of CAD/CAM cantilever reconstructions to restore compromised posterior teeth: a preliminary report.

Purpose: To describe the survival, clinical rating, and patient satisfaction of monolithic computer-aided design/computer-assisted manufacture (CAD/CAM) ceramic single unit cantilever crowns placed on hemisected molars and premolars after a follow-up of at least 12 months.

Materials And Methods: Sixteen consecutive patients (mean age, 56.8 years) with 16 restored two-unit cantilever crowns (5 premolars and 11 hemisected molar abutments) were reevaluated after an observation period of at least 12 months.

Current status and perspectives of mucogingival soft tissue measurement methods.

Unlabelled: The morphologic and metric assessment of mucogingival soft tissue dimensions is of great multidisciplinary clinical and academic interest, in order to quantify and monitor gingival changes while in treatment, e.g., during periodontal, restorative, prosthetic, orthodontic, or implant therapy.

Effect of two self-adhesive cements on marginal adaptation and strength of esthetic ceramic CAD/CAM molar crowns.

Purpose: This study evaluated the effects of adhesive cements on marginal adaptation and fracture resistance of ceramic molar crowns.

Materials And Methods: Seventy-five extracted maxillary molars were selected. The occlusal morphology of 15 molars (control) was scanned and transferred to the crowns in the test groups by CAD/CAM.

Effects of total and selective bonding on marginal adaptation and microleakage of Class I resin composite restorations in vitro.

This study assessed the marginal integrity and microleakage of standardized Class I resin composite restorations when placed with either "total" or "selective bonding" techniques. Sixty standardized Class I cavities comprising the main fissure system were prepared (9 mm length and 7 mm width). Cavity depth was set at 2.

Strength of CAD/CAM-generated esthetic ceramic molar implant crowns.

Purpose: One-visit in-office CAD/CAM fabrication of esthetic ceramic crowns as a superstructure for posterior implants is quite new. The aim of the study was to evaluate the strength of esthetic ceramic CAD/CAM crowns with varied occlusal thickness and seated with adhesive and nonadhesive cements on titanium and zirconia abutments.

Materials And Methods: Esthetic ceramic CAD/CAM-generated molar crowns (n = 15 per group) with occlusal thicknesses of 0.

Sinus floor elevation using an osteotome technique without grafting materials or membranes.

This retrospective study aimed to radiographically assess sinus floor remodeling after using a modified osteotome technique without graft materials or membranes. After pilot drilling, residual bone was fractured and raised with the schneiderian membrane to the final implant length using osteotomes. Self-tapping implants were placed, and restorations were placed 6 months later.

Effects of de- and remineralization of dentin on bond strengths yielded by one-, three-, and four-step adhesives.

Purpose: To assess the effect of different peri- and intertubular dentin mineralization conditions and etching on shear bond strength in vitro.

Materials And Methods: One hundred fifty crowns of extracted bovine incisors were embedded in resin and ground to expose the buccal coronal dentin. Sixty specimens were subjected to a demineralizing solution (DS) and another 60 teeth to a bacterial-based laboratory caries model (S.

Fit of all-ceramic posterior fixed partial denture frameworks in vitro.

The objective of this study was to evaluate, by scanning electron microscopy, the marginal and internal fit of all-ceramic three-unit fixed partial denture (FPD) frames fabricated by computer-assisted design/computer-aided machining (CAD/CAM) and CAM techniques using blocks of infiltration ceramic, high-strength yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) zirconia sinter ceramic, high-strength dense sintered Y-TZP zirconia ceramic, and glass ceramic. Slip-cast infiltration ceramic was used as a traditional control. The cementation interface widths of the FPD frame copings on butt (A) shoulders of Cerec In-Ceram zirconia (A1, 53 +/- 17 microm) were smaller than those of slip-cast In-Ceram zirconia (A6, 113 +/- 25 microm).

The bonding area of intra- and extra-coronal tooth preparations.

Purpose: To assess the accuracy of preparation surface area measurements (mm2) using the Cerec digital mouth camera in vitro and to analyze a collection of 514 Cerec camera in vivo optical impressions of preparations from 274 patients according to the size of preparation/bonding area (mm2)

Methods: The surface area (mm2) of model preparations with known dimensions namely of one occlusal (1) and one mesio-occluso-distal (2) cavity as well as of one central incisor (3) and one molar (4) crown preparation was calculated from linear (a) design dimensions, (b) slide-gauge and (c) coordinate-measuring-machine data as benchmark measurements and from repeated (n=10) (d) laser-scan (control), (e) Cerec-camera mounted on a support, (f) handheld Cerec-camera measurements. Data of (d), (e) and (f) was statistically analyzed. From a collection of data sets clinically recorded with the Cerec camera, the surface areas of 514 preparations from 274 patients were analyzed according to the type of tooth and type of preparation.

Strength and fracture pattern of monolithic CAD/CAM-generated posterior crowns.

Objectives: This study evaluated the strength and fracture pattern of monolithic posterior CAD/CAM crowns hypothesizing that zinc-phosphate cemented lithium disilicate crowns might show the same fracture strength as adhesively cemented crowns.

Methods: Two sets of monolithic posterior crowns each with uniform occlusal and lateral wall thickness of 1.5mm were fabricated from three types of block ceramic (1) lithium disilicate glass, (2) leucite glass and (3) feldspathic ceramic using CEREC 3 CAD/CAM.

Survival of ceramic computer-aided design/manufacturing crowns bonded to preparations with reduced macroretention geometry.

Purpose: Adhesive cementation reduces the need for macroretentive preparation for crowns. This study investigated the survival and clinical rating of monolithic computer-aided design/manufacturing (CAD/CAM) ceramic crowns bonded to preparations with reduced macroretention, hypothesizing that adhesion would compensate for reduced retention geometry.

Materials And Methods: Two-hundred eight posterior CAD/CAM-generated crowns from feldspar block ceramic were adhesively bonded in 136 patients in three preparation groups: classic (100% stump height, n = 70); reduced (reduced stump height or irregular stump, n = 52); and endo (absent stump but pulp chamber retention cavity, n = 86).

Effect of ozone on enamel and dentin bond strength.

Purpose: To evaluate the influence of direct high-dose gaseous ozone application (2100 ppm) on dentin and enamel shear bond strength.

Materials And Methods: Ten bovine enamel and dentin samples per group were pretreated as follows: (I) ozone application (Healozone, KaVo) for 60 s alone or (II) with subsequent application of a fluoride- and xylitol-containing antioxidant (liquid reductant), (III) light-activated bleaching with 35% hydrogen peroxide for 5 min serving as negative control (Hi-Lite, Shofu), and (IV) untreated enamel and dentin (positive control). Specimens were bonded with a functional 3-step adhesive system (Syntac Classic, Ivoclar Vivadent) and restored with a composite (Tetric Ceram, Ivoclar Vivadent) according to the Ultradent method.