PURPOSE: The aim of this study was to investigate whether treatment of sperm from infertile patients would gluthatione could reduce sperm premature chromosome condensation (PCC). To reach the goals of this study, the frequency of sperm PCC formation in sperm of normal and sub-fertile men with/without glutathione treatment were compared ...

The titanium nitride coated titanium is a material intended for the fabrication of left ventricular assist device. As per International standards, a material is subjected to pre-clinical evaluation before fabrication of a device. Toxicity/biocompatibility studies such as acute systemic toxicity, intracutaneous irritation, in vitro haemolysis and implantation in muscle were ...

Conventional light microscopic evaluation of a semen ejaculate does not fully utilize potential indicators of functional impairment in sperm organelles. The technique described here facilitates critical evaluation of morphological features of spermatozoal organelles at an ultrastructural level and helps identify vulnerable targets. Compared with a battery of sperm function assays ...

Abstract Four commercial brands of chemically activated acrylic resin were compared through photoelastic analysis. Resin blocks were made with two implants placed parallel to each other and two square transfer copings splinted. Both transfers were splinted with chemically activated acrylic resin: Dencrilay, Duralay I, Duralay II and GC. Data were ...

In April 2010, a Medicines and Healthcare Products Regulatory Agency safety alert concerning all metal-on-metal (MOM) hip replacements recommended measuring chromium and cobalt concentrations when managing patients with painful prostheses. The need for this review is illustrated by the recent surge in requests for these blood tests from orthopaedic surgeons ...

Metal implants corrode and release metal ions, cobalt and chromium, which, in turn, may cause systemic toxicity, mostly in the first few months from implantation of metal-on-metal hip arthroplasty. At the time of delivery, the placenta reduces the passage of cobalt and chromium ions released from metal-on-metal prosthesis. From a ...

A lingering concern with restored root-filled teeth is the loss of structural integrity of the dentin and dentin-sealer interface over time. We hypothesized that crosslinking of dentin collagen with simultaneous incorporation of a biopolymer into collagen matrix would improve its structural stability. This study aimed to investigate the effects of ...

SUMMARY Purpose : To determine the change in the chemical composition of enamel and dentin as well as to evaluate the differences in surface texture of the same dental hard tissues following three at-home bleaching systems in vitro. Methods : Sixty extracted intact human anterior teeth were used in this ...

Ti alloys have been widely used in the aerospace, chemical, and biomedical industries for their high strength/weight ratio and corrosion resistance. However, Nitinol's usage in the latter industry has been fraught with concerns of allergic and toxic effects of Ni released from implants. Recently, much attention has been placed on ...

Abstract Background and objective: The disadvantage of photodynamic therapy (PDT) is in the photosensitizing agents that may stain the tooth structure. There is no register of PDT studies evaluating protocols to minimize that concern. The present study evaluated the efficiency of chemical adjuncts in methylene blue dye (MB) removal after ...

Dissolution resistance and adhesion strength are two main concerns for long-term stability of surface coated metal implants. In this study, fluorine ions are incorporated into magnesium-containing hydroxyapatite coatings (MgF( y )HA) via sol-gel method to improve the long-term stability of the implants. Surface and interface are studied in terms of ...

The aim of this work is to prepare a new type of phosphogypsum-sulfur polymer cements (PG-SPC) to be utilised in the manufacture of building materials. Physico-chemical and radiological characterization was performed in phosphogypsum and phosphogypsum-sulfur polymer concretes and modeling of exhalation rates has been also carried out. An optimized mixture ...

Objective: To evaluate the use of a single Astra Tech implant to support a two-unit cantilever fixed dental prosthesis. Materials and method: Twenty-nine subjects with an edentulous space (at least equivalent to two bicuspid units) in the premolar/molar segments of the maxilla or mandible with opposing natural teeth or a ...

Objectives: Panoramic radiographs allow evaluation of the available bone height for implant treatment planning while imparting a low radiation dose. As panoramic radiography produces image distortion, reference objects are required to determine the exact magnification. This study aims to estimate a panoramic unit's vertical magnification factor (MF) by measuring the ...

Fluoridated hydroxyapatite (FHA) coatings exhibit great potential for applications on implants which require good bioactivity and high antibacterial activity. This work is a comparative study of chemical stability, adhesive strength and zeta potential of a nanothick (about 200 nm) FHA coating which is densely and uniformly deposited on a titanium ...

Clinical Relevance Deficient polymerization can occur in deeper cavities due to the dispersion of light irradiance, and it may affect microleakage of the tooth-restoration interface. When using a quartz-tungsten-halogen light-curing unit with relatively low irradiance (420 mW/cm(2)) to restore a Class II restoration, microleakage can be reduced if the resin-composite ...

doi:10.1111/j.1741-2358.2009.00334.x The comparison of marginal bone loss around mandibular overdenture-supporting implants with two different attachment types in a loading period of 36 months Objective:  The aim of this study was to assess the influence of attachment types on the marginal bone loss (MBL) around dental implants supporting mandibular overdentures (OVD). Background:  ...

Composite restorations in modern restorative dentistry rely on the bond formed in the adhesive-infiltrated acid-etched dentin. The physical characteristics of etched dentin are, therefore, of paramount interest. However, characterization of the acid-etched zone in its natural state is fraught with problems stemming from a variety of sources including its narrow ...

The purpose of this multicentre observational study was to determine patient satisfaction with either conventional dentures or mandibular 2-implant overdentures in a 'real world' setting. Two hundred and three edentulous patients (mean age 68·8 ± 10·4 years) were recruited at eight centres located in North America, South America and Europe. ...

doi:10.1111/j.1741-2358.2009.00348.x Refusal of implant supported mandibular overdentures by elderly patients Objective:  The aim of this study was to gain greater in-depth understanding of why elderly patients who are currently dissatisfied with conventional dentures decline implant treatment. Background:  There is strong evidence from high-quality randomised controlled trials to support the use ...

We report on photoluminescence in the 1.7-2.1μm range of silicon doped with thulium. This is achieved by the implantation of Tm into silicon that has been codoped with boron to reduce the thermal quenching. At least six strong lines can be distinguished at 80K; at 300K, the spectrum is dominated ...

Recent reports claim that modern light-emitting diode (LED) curing units improve curing efficiency by increasing the units' irradiance. In this context also, short polymerisation times up to 5 s are proposed. The aim of this study was to examine whether there are differences in the curing efficiency of modern LED curing ...

A combination of solid-state NMR spectroscopy and MRI was used to evaluate the formation of extracellular matrix in poly(D,L-lactide-co-glycolide) (PLGA) bone implants. Porous PLGA scaffolds were implanted into rat tibiae and analysed after 2, 4 or 8 weeks. MRI clearly delineated the implants within the cancellous bone. Differences in the ...

The chemical-mechanical removal of caries involves the chemical softening of the infected dentin, following by the mechanical removal of the softened tissue using non-cutting manual instruments. Papacárie (Fórmula&Açāo, Sao Paulo, Brazil) is a product in gel form used for the chemical-mechanical softening of the affected tissue. The purpose of the ...

Objective: to evaluate patient satisfaction with implant-retained overdentures, and its relationship with age, sex, period of follow-up, the rehabilitated jaw (maxilla, mandible or both), number of implants, splinting, type of attachment and the antagonist. Material and methods: the study comprised patients with overdentures fitted between January 1996 and June 2007, ...

The use of artificial implants provides a palliative or permanent solution for individuals who have lost some bodily function through disease, an accident or natural wear. This functional loss can be compensated for by the use of medical devices produced from special biomaterials. Titanium alloy (Ti-6Al-4V) is a well-established primary ...

Prosthesis fracture is a common complication associated with implant-retained overdentures. A new overdenture can be strengthened by incorporating a cast metal reinforcement during processing. The authors describe a technique for converting an existing conventional nonreinforced serviceable denture into an overdenture that includes a cast metal reinforcement and its attachments.

A 48-year-old woman sought treatment because her staple implant-retained overdenture was no longer retentive, and the denture was worn over the abutments. After unsuccessfully attempting to move the retentive nuts along the transosseous posts of the staple implant, the posts were cut off at the level of the bone. Two ...

Objective: The aim of this long-term study was to compare the need for prosthetic aftercare of direct vs. indirect attachment incorporation techniques to mandibular implant-supported overdenture. Materials and methods: Forty-five consecutive patients were included (130 implants were placed). Treatment was randomly allocated, resulting in 22 patients (group A) to be ...

Oral rehabilitation by means of implant-retained mandibular overdentures is known to improve oral function. The aim of this study was to evaluate the long-term effects of mandibular implant treatment on oral function. We quantified maximum bite force and masticatory performance 10 years after implant treatment. It was hypothesized that these ...

Summary  Studies investigating the relationship between personality traits and quality of life related to the types of dental prostheses are scarce. The aim of the present study was to assess personality traits and their impact on quality of life for individuals treated with either conventional mandibular dentures (CMD) or implant-supported ...

The aim of this clinical study was to evaluate the prosthodontic maintenance requirements during the first year of service of mandibular overdentures supported by interforaminal implants and to assess the influence of attachment type, implant number, and bite force on these requirements. Fifty-nine patients treated with mandibular implant overdentures between ...

The aim of this 1-year evaluation was to assess the stability of implants and the responses of the supporting tissues to magnet-retained mandibular implant overdentures. Six patients with completely edentulism were enrolled in this study. Each patient received 2 implants with sandblasted with large-grit and acid-etched surfaces in the interforaminal ...

Objectives: To determine surgical and prosthodontic outcomes of mandibular single-implant overdentures, opposing complete maxillary dentures, using a wide diameter implant and large ball attachment system compared with different regular diameter implants with standard attachment systems. Materials and methods: Thirty-six edentulous participants (mean age 68 years, SD 9.2) were randomly assigned ...

June 2010 marks the 50th anniversary of the first successful human cardiac pacemaker implantation in the United States. On June 6, 1960, in Buffalo, New York, Dr. William Chardack implanted a pacemaker, designed and built by Wilson Greatbatch, an electrical engineer and inventor, in a 77-year old man with complete ...

Summary  This study assessed the effect of simulated mastication on the retention of two stud attachment systems for 2-implants overdentures. Sixteen specimens, each simulating an edentulous ridge with implants and an overdenture were divided into two groups, according to the attachment system: Group I (Nobel Biocare ball-socket attachments) and Group ...

The purpose of this article is to report the clinical course of a 12-year-old child with ectodermal dysplasia who was treated with an implant-supported overdenture for the mandible and an overdenture for the maxilla. Two dental implants were placed in the canine regions of the mandible. The maxillary teeth were ...

This case series evaluated the implant success rate and peri-implant tissue response of immediately loaded unsplinted implants retaining a mandibular overdenture. Eight completely edentulous patients (five men, three women) with a mean age of 69.1 years were included in the study. All participants received new maxillary and mandibular complete dentures ...

doi: 10.1111/j.1741-2358.2010.00421.x The influence of implant number and attachment type on maximum bite force of mandibular overdentures: a retrospective study Aim:  Assessment of the influence of such factors as attachment type, number of implants, gender and age of patients on maximum bite force (MBF). Material and methods:  Sixty-two edentulous patients ...

Abstract Implant-retained mandibular ball-supported and bar-supported overlay dentures are the two most common treatment options for the edentulous mandible. The superior option in terms of strain distribution should be determined. The three-dimensional model of mandible (based on computerized tomography scan) and its overlying implant-retained bar-supported and ball-supported overlay dentures were ...

The aim of this study was to evaluate the self-aligning overdenture attachment system by comparing its oral health-related quality of life (OHRQL) with a traditionally used ball attachment system. In this randomized, within-subject crossover trial, 25 edentulous subjects each received 2 mandibular implants, and were then assigned to receive either ...

Gerodontology 2010; doi: 10.1111/j.1741-2358.2010.00374.x Clinical feasibility of mandibular implant overdenture retainers submitted to immediate load Introduction:  Millions of people around the world do not have access to the benefits of osseointegration. Treatments involving oral rehabilitation with overdentures have been widely used by specialists in the oral medicine field. This is ...

An implant-retained overdenture is less expensive than a fixed implant-retained prosthesis; however, using ball attachments on abutments that are nonparallel and/or outside the path of insertion may result in loss of retention. As described in this case report, alignment devices can be used as a mandibular overdenture retainer to diminish ...

PURPOSE: The aim of this study was to evaluate patient satisfaction and clinical and prosthetic outcomes of two-implant mandibular overdenture treatment with different attachment types after 10 years of function. MATERIALS AND METHODS: In a crossover clinical trial, 18 edentulous subjects with complaints regarding their mandibular dentures received two implants ...

PURPOSE: To assess and compare patient satisfaction and oral health-related quality of life (OHQOL) in patients treated with implant-supported overdentures and complete implant fixed prostheses. MATERIALS AND METHODS: From a database of patients who had undergone implant treatment over a 6-year period, a study population of 62 patients was identified; ...

doi: 10.1111/j.1741-2358.2010.00389.x The effect of different attachment systems with implant-retained overdentures on maximum bite force and EMG Objective:  To compare the effect of different attachment systems with implant-retained overdentures on maximum bite force and muscle activity using electromyography (EMG). Background:  Denture retention and stability is of considerable interest in prosthetic ...

PURPOSE: The present study evaluated implant and peri-implant outcomes as well as prosthodontic maintenance efforts for implant/bar-supported mandibular prostheses with different prosthesis anchorage systems. MATERIALS AND METHODS: Seventy-six patients who received two or four interforaminal implants were assigned to one of three different bar designs and subsequently to different prosthesis ...

PURPOSE: Problems associated with a complete denture, such as lack of stability and retention, can be solved with the use of implant-retained or implant-supported overdentures. However, controversy exists as to the anchorage system used and indications for both the maxilla and mandible. The purpose of this review was to identify ...

PURPOSE: The aim of this study was to compare between the effects of resilient liner and clip attachments of bar-implant-retained mandibular overdenture on peri-implant tissues. MATERIALS AND METHODS: In a randomized-controlled clinical trial, 30 edentulous male patients (mean age 62.5 years) were equally assigned to two groups. In each patient, ...

A long-term denture wearer exhibited advanced alveolar bone loss, resulting in an atrophic mandible. Symphyseal bone height was 10 mm. The inferior alveolar nerve and mental foramen were close to the crest of the mandible. The symphyseal region was available for endosteal implant placement. Patient was an 83-year-old white male ...