Influence of direct laser fabrication implant topography on type IV bone: a histomorphometric study in humans.

The aim of this histologic study was to evaluate the influence of the direct laser fabrication (DFL) surface topography on bone-to-implant contact (BIC%), on bone density in the threaded area (BA%) as well as bone density outside the threaded area (BD%) in type IV bone after 8 weeks of unloaded healing. Thirty patients (mean age 51.34 +/- 3.

Histomorphometric evaluation of bioceramic molecular impregnated and dual acid-etched implant surfaces in the human posterior maxilla.

Background: Physical and bioceramic incorporation surface treatments at the nanometer scale showed higher means of bone-to-implant contact (BIC) and torque values compared with surface topography at the micrometer scale; however, the literature concerning the effect of nanometer scale parameters is sparse.

Purpose: The aim of this study was to evaluate the influence of two different implant surfaces on the percentage bone-to-implant contact (BIC%) and bone osteocyte density in the human posterior maxilla after 2 months of unloaded healing.

Materials And Methods: The implants utilized presented dual acid-etched (DAE) surface and a bioceramic molecular impregnated treatment (Ossean®, Intra-Lock International, Boca Raton, FL, USA) serving as control and test, respectively.

Dimensional changes between free gingival grafts fixed with ethyl cyanoacrylate and silk sutures.

This study evaluated the dimensional changes in free gingival grafts fixed with ethyl cyanoacrylate or sutures. Twenty-four subjects with gingival recession and absence of keratinized mucosa were divided into two groups: free gingival grafts fixed with ethyl-cyanoacrylate (Group 1) and fixed with sutures (Group 2). Probing depth, clinical attachment level, gingival recession, and dimensional changes of height and width were evaluated immediately post-operatively and at 15, 30, 45, and 90 days after surgery.

Osteocyte density in the peri-implant bone of immediately loaded and submerged dental implants.

Background: The role of osteocytes in bone structure and function remains partially unresolved. Their participation in mechanotransduction, i.e.

Effect of systemic intermittent administration of human parathyroid hormone (rhPTH[1-34]) on the resistance to reverse torque in rabbit tibiae.

The aim of this study was to evaluate the effect of intermittent administration of human parathyroid hormone [rhPTH (1-34)] on the removal torque of implants placed in rabbit tibiae. Twenty male New Zealand rabbits were submitted to implant surgery. Each animal received one machined screw-type implant (3.

Knoop microhardness and FT-Raman spectroscopic evaluation of a resin-based dental material light-cured by an argon ion laser and halogen lamp: an in vitro study.

Objective: The purpose of this study was to evaluate in vitro the Knoop microhardness (Knoop hardness number [KHN]) and the degree of conversion using FT-Raman spectroscopy of a light-cured microhybrid resin composite (Z350-3M-ESPE) Vita shade A3 photopolymerized with a halogen lamp or an argon ion laser.

Background Data: Optimal polymerization of resin-based dental materials is important for longevity of restorations in dentistry.

Materials And Methods: Thirty specimens were prepared and inserted into a disc-shaped polytetrafluoroethylene mold that was 2.

VEGF and MVD expression in sinus augmentation with autologous bone and several graft materials.

Objective: The aim of this study was to assess vascular endothelial growth factor (VEGF) expression and microvessel density (MVD) in maxillary sinus augmentation with autogenous bone and different graft materials for evaluating their angiogenic potential.

Methods: Biopsies were harvested 10 months after sinus augmentation with a combination of autogenous bone and different graft materials: hydroxyapatite (HA, n = 6 patients), demineralized freeze-dried bone allograft (DFDBA, n = 5 patients), calcium phosphate (CP, n = 5 patients), Ricinus communis polymer (n = 5 patients) and control group--autogenous bone only (n = 13 patients).

Results: In all the samples, higher intensities of VEGF expression were prevalent in the newly formed bone, while lower intensities of VEGF expression were predominant in the areas of mature bone.

Composition of supra- and subgingival biofilm of subjects with healthy and diseased implants.

Objectives: The purpose of this study was to compare the microbial composition of supra- and subgingival biofilm in subjects with and without peri-implantitis.

Material And Methods: Forty-four subjects (mean age 48.9 +/- 13.

Histologic analysis of human peri-implant bone in type 1 osteoporosis.

Osteoporosis is a disease that influences the quality of bone tissue. At present, osteoporosis represents a contraindication or a risk factor for osseointegration. The aim of this report was to evaluate the bone-to-implant contact of 2 loaded implants retrieved after prosthetic failure in a woman with type 1 osteoporosis.

Human histologic evaluation of a six-year-old threaded implant retrieved from a subject with osteoporosis.

Aim: The aim of this case report was to present the evaluation of the bone-to-implant contact in an implant retrieved from a subject with osteoporosis after six years of load.

Background: Systemic conditions associated with osteoporosis have been postulated to contribute to the severity of alveolar bone loss. The increase in human life expectancy, the increased number of elderly subjects who are partially or totally edentulous, and the use of dental implants for oral habilitation in subjects with osteoporosis has raised several questions.

Gingival primary extranodal non-Hodgkin's lymphoma as the first manifestation of acquired immunodeficiency syndrome.

Background: Non-Hodgkin's lymphomas (NHLs) are a heterogeneous group of lymphoproliferative malignancies that may be associated with acquired immunodeficiency syndrome (AIDS). NHL can disseminate to extranodal sites; however, its dissemination to the jaws and mouth is not common. This report presents and discusses two unusual cases of gingival primary extranodal non-Hodgkin's lymphoma (PE-NHL) as the first manifestation of AIDS.

Histological comparison between implants retrieved from patients with and without osteoporosis.

The aim of this restrospective histologic study was to evaluate the bone-to-implant contact of loaded implants retrieved from patients with and without osteoporosis. The evaluated material consisted of 22 threaded, cylindrical, loaded dental implants retrieved from 21 patients: 7 from 7 women with postmenopausal osteoporosis (osteoporosis group) and the remaining 15 from 14 patients without history of osteoporosis or other metabolic diseases (control group). Histologic analysis revealed bone tissue in the threads of the retrieved implants, with variations in the percentage of bone-to-implant contact for the implants retrieved from both groups.

Evaluation of human bone around a dental implant retrieved from a subject with osteoporosis.

Osteoporosis is a metabolic bone disease that leads to bone fragility and an increase in the risk of bone fracture. Nowadays, osteoporosis may represent a contraindication or a risk factor for osseointegration; however, this field still is controversial in the literature. This article sought to evaluate the bone-to-implant contact of a loaded implant that had been retrieved (due to prosthetic failure) from a woman with Type 1 osteoporosis.

Scanning electron microscope assessment of several resharpening techniques on the cutting edges of Gracey curettes.

Aim: Treatment of periodontal diseases is based on efficient scaling and root planing (SRP) and adequate maintenance of the patient. The effectiveness of SRP is influenced by operator skill, access to the subgingival area, root anatomy, and the quality and type of instrument used for SRP. The aim of this study was to evaluate the cutting edges of Gracey curettes after manufacturing and after resharpening using several techniques.

Prevalence of maxillary sinus septa in 1024 subjects with edentulous upper jaws: a retrospective study.

Maxillary sinus floor augmentation has been routinely performed to optimize dental implant placement in the posterior maxilla. However, complications during a sinus grafting procedure, such as perforation of the Schneiderian membrane, have been reported. This complication is generally associated with the presence of maxillary septa.

Implant surface analysis and microbiologic evaluation of failed implants retrieved from smokers.

The aim of this study was to evaluate the microbiota and surface of failed titanium dental implants from 4 manufacturers. Twelve mobile dental implants were retrieved from 10 smokers after 3 to 10 years of functional loading. Before implant removal, microbial samples were taken and evaluated using polymerase chain reaction.

Human peri-implant bone response to turned and oxidized titanium implants inserted and retrieved after 2 months.

Purpose: The aim of this study was to evaluate the influence of oxidized surface on bone-to-implant contact percentage (BIC%) as well as the bone density within the threads area (BD%) in human bone after 2 months of unloaded healing.

Materials: Seven subjects (mean age 45.57 +/- 10.

Effect of anesthetics containing lidocaine and epinephrine on cardiovascular changes during dental implant surgery.

The purpose of this study was to evaluate cardiovascular changes during dental implant surgery using 2% lidocaine with 1:80 000 epinephrine. Eleven normotensive subjects, ranging from 18 to 56 years, were selected to undergo dental implant surgery in the jaw. They were monitored in the pre-, intra-, and postsurgical periods by continuous noninvasive automatic arterial pressure and cardiac frequency measurements taken every 2 minutes.

Histologic evaluation of human bone integration on machined and sandblasted acid-etched titanium surfaces in type IV bone.

The aim of this preliminary study was to evaluate the influence of a sandblasted acid-etched surface on bone-implant contact percentage (BIC%) as well as the bone density in the threads area (BD%) in type 4 bone after 2 months of unloaded healing. Five subjects (mean age = 42.6 years) received 2 microimplants each during conventional implant surgery in the posterior maxilla.

Histological comparison of bone to implant contact in two types of dental implant surfaces: a single case study.

Aim: The purpose of this single case study was to evaluate the influence of different implant surfaces on human bone and osseointegration.

Methods And Materials: A 47-year-old partially edentulous woman received two experimental implants along with conventional implant therapy. Experimental implants placed in the mandibular ramus consisted of machined and anodized surfaces, respectively.

Restoration of the soft-tissue margin in single-tooth implant in the anterior maxilla.

Esthetic requirements for dental implant restoration have arisen in recent years. Despite several surgical techniques that have been developed, the treatment of the peri-implant soft-tissue defect is still difficult. The purpose of this clinical article is to describe a grafting technique using subepithelial connective tissue grafts to recontour soft-tissue margin discrepancy for single-tooth implant restorations in the anterior maxilla.

Histologic evaluation of early human bone response to different implant surfaces.

Background: Studies have demonstrated that roughened dental implant surfaces show firmer bone fixation and an increased percentage of bone-to-implant contact (BIC%) compared to commercially pure titanium-surface (machined) implants. Therefore, the purpose of this study was to evaluate the influence of implant-surface topography on human bone tissue after 2 months of unloaded healing.

Methods: Fourteen subjects with a mean age of 46.

Scaling and root planing and chlorhexidine mouthrinses in the treatment of chronic periodontitis: a randomized, placebo-controlled clinical trial.

Objective: Evaluation of the clinical and microbiological effects of scaling and root planing (SRP) alone or in combination with 0.12% chlorhexidine (CHX) rinsing.

Methods: A blind, placebo-controlled, parallel-design, randomized clinical trial was conducted in 29 subjects with chronic periodontitis.

Microbiota of the dorsum of the tongue after plaque accumulation: an experimental study in humans.

Background: The purpose of the present investigation was to determine the effect of the absence of tongue hygiene on the microbiota of the dorsum of the tongue.

Methods: Ten volunteers (aged 19 to 22 years) entered the study at baseline and were instructed to abstain from tongue cleaning for 7 days, followed by a period of 3 days without any kind of oral hygiene. Subsequently, a period of 21 days of washout was employed, and this protocol was repeated three times.

Influence of implant surface topography on early osseointegration: a histological study in human jaws.

The purpose of this study was to evaluate the influence of the oxidized surface on bone-to-implant contact (BIC%), the bone density in the threaded area (BA%), as well as the bone density outside the threaded area (BD%) in human jaws after 2 months of unloaded healing. Thirteen subjects (mean age 42.61 +/- 6.