Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “CEMENTATION”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 271 records · Page 15Linked to original sources
PubMed1996

The frequency of venous thrombosis in cemented and non-cemented hip arthroplasty.

We randomised 250 patients undergoing unilateral, elective hip arthroplasty for osteoarthritis to receive either a cemented or a non-cemented Mallory Head prosthesis. Aspirin was used as prophylaxis against thromboembolism during the first half of the study and adjusted-dose warfarin during the second half. Postoperatively, all patients were asked to have bilateral venography and 80% agreed. All were evaluated clinically for pulmonary embolism. There was no difference in the frequency of deep-venous thrombosis between the two groups (50% cemented nu 47% non-cemented, p = 0.73; 95% CI of the difference -13.6% to 19.3%). Three of the 64 patients (5%) in whom venography had demonstrated isolated distal thrombi developed pulmonary emboli.

Aged↗
PubMed1994

Marginal breakdown of fired ceramic inlays cemented with glass polyalkenoate (ionomer) cement or resin composite.

The marginal breakdown of fired porcelain inlays in vivo, luted with either a dual-cured resin composite or a glass polyalkenoate(ionomer) cement, was evaluated by scanning electron microscopy. Immediately following polishing (baseline) and after 1 year, replica impressions were made of the occlusal and proximal margins of two inlays, one cemented with the resin composite and the other with the glass ionomer cement, in each of 12 patients. At baseline the best marginal adaptation was observed along the proximal margins of the composite luted inlays, while occlusally glass ionomer luted inlays showed better marginal qualities than the composite luted inlays. At 1 year the composite luted inlays showed significantly better marginal adaptation than the glass ionomer luted ones at all interfaces. The greatest breakdown was observed occlusally, especially in the glass ionomer luted inlays. Gap sizes varied proximally between 83 and 100 microns and occlusally between 107 and 143 microns. Severe ditching was observed occlusally in the glass ionomer luted inlays. The overall marginal quality was significantly better for the inlays luted with the resin composite both at baseline and after 1 year.

Analysis of Variance↗
PubMed1999

An in vitro investigation of a poly (vinyl phosphonic acid) based cement with four conventional glass-ionomer cements Part 2: Maturation in relation to surface hardness.

OBJECTIVE: To investigate the surface hardness of four conventional glass-ionomer cements: Ketac-Molar (KM), HiFi (HF), Vivaglass Fil (VF), Ketac-Fil (KF) and a newly developed glass polyphosphonate based cement, Diamond Carve (DC) at different maturation times in water and to investigate the effects of early water exposure on their surface hardness. METHOD: Disc specimens (10 mm diameter, 1 mm thick) were prepared and mould stored at 37 degrees C. The effect of different maturation times (15, 30 and 60 min) and storage in water over 24 h after those maturation times on surface hardness was determined using a microindentor with a Vickers diamond indentor. The results of the surface hardness tests were analysed using Mann-Whitney non-parameteric statistics (p < or = 0.05). The working (WT) and setting (ST) times of the cements were also measured using a modified Wilson oscillating rheometer. RESULTS: All the materials became harder after 24 h immersion in water. HF, VF and DC showed initial sensitivity to a short maturation time, but only HF was adversely affected by early moisture exposure. KF and KM were least sensitive to short maturation time or early water exposure. DC had the shortest and HF the longest WT and ST. HF and VF had a high WT:ST ratio of 1:7 and 1:9, respectively. CONCLUSIONS: A short maturation time (of 15 min) and early exposure to water did not adversely affect the surface hardness of KF, KM, VF and DC. DC, based on poly(vinyl phosphonic acid), had the shortest WT and ST. Poly(acrylic acid) based HF and VF had a long ST in relation to their WT.

Composite Resins↗
PubMed1999

In vivo measurement of acetabular cement pressurization using a simple new design of cement pressurizer.

Aseptic loosening of the acetabular component remains a limiting factor in the long-term success of total hip replacement. An instrumented pressurizer has been designed to allow the intraoperative measurement of acetabular cement pressurization, which is known to contribute to implant fixation. Average intraoperative cement pressures in 16 operations performed by 2 surgeons were 49 +/- 17 kPa (6.4 +/- 2.3 psi) and 47 +/- 17 kPa (6.2 +/- 2.2 psi), and peak pressures were 76 +/- 5 kPa (10.0 +/- 0.6 psi) and 93 +/- 15.kPa (12.2 +/- 1.9 psi), comparable to previous work in vitro. The pressurization required for optimal cement penetration into cleaned low-density cancellous bone is reported to be of the order of 35 to 50 kPa (4.6-6.6 psi) for 30 to 60 seconds, and the present data show that this is attainable in vivo using a simple device.

Acetabulum↗
PubMed2002

Retrograde injection of a nutrient vein with cement in cemented total hip arthroplasty.

An 80-year-old woman received a cemented total hip arthroplasty. The surgery was performed without intraoperative complications. Postoperative radiographs and a computed tomography scan revealed a nutrient vein perforating the femur, which was retrogradely filled with cement. An abdominal and thoracic computed tomography scan showed no further dissemination of cement.

Aged↗
PubMed1989

Conditioning of root canals prior to dowel cementation with composite luting cement and two dentine adhesive systems.

Two hundred and forty root canals of extracted single-rooted teeth were prepared to the same dimension, and Dentatus posts of equal size were cemented without screwing them into the dentine. Five cleansing solutions and two dentine adhesive systems were evaluated prior to post-cementation using chemical-cure composite resin. 'Pull-out' tests were then conducted in order to evaluate the bond strength of these intra-pulpal posts. The use of Conclude (composite luting cement) alone, with or without the cleansing solutions, resulted in significantly lower pull-out forces. Scotchbond Dental Adhesive gave significantly better results, regardless of the cleansing solution used. Gluma Dentine Adhesive significantly increased the pull-out forces only when used with its supplied cleanser or Tubulicid.

Acrylates↗
PubMedDate not supplied

Advances in the use of glass-ionomeric cement. Part 2: Functional results of fine application of low-viscosity glass-ionomeric cement: animal experimental results.

An experimentally developed technique for microapplication of low-viscosity glass-ionomeric cement (see part 1) was tested in animals over a 6-month period. The cement was used to firmly connect gold with titanium and gold with middle ear ossicles in 22 adult foxhounds. After a 6-month period of acoustic stimulation via parts of an implantable hearing aid, the finely applied glass-ionomeric cement was integrated in situ, stable and caused no adverse reactions. The microapplication technique used proved to be easy, effective and provided long-term stability.

Aluminum Silicates↗
PubMed1995

The effect of sandblasting on the retention of first molar orthodontic bands cemented with glass ionomer cement.

This study examined the effect of sandblasting, in vitro, on the bond strength and survival time of first molar orthodontic bands. Survival time was assessed following simulated mechanical fatigue in a ball mill. The amount of cement left attached to the band after debanding was also assessed. In addition, the effect of sandblasting on the failure rate of 320 first molar bands cemented in 107 patients was examined in a half-mouth trial. Ketac-cem, mixed according to manufacturers' instructions was used as the luting agent for both laboratory and clinical trials. In vitro, sandblasting increased bond strength by 27 per cent (P < 0.01) and produced a three-fold increase in the median survival time relative to the untreated sample (P < 0.001) in the ball mill experiment. Sandblasting resulted in more cement remaining on the band rather than on the tooth enamel after band removal. In vivo, sandblasting reduced the clinical failure rate of the first molar bands (P < 0.001).

Adolescent↗
PubMed1989

A 12-month clinical study comparing four glass ionomer cements for the cementation of orthodontic molar bands.

Four different glass ionomer cements were evaluated in vivo as luting agents for orthodontic molar bands. A sample of 199 patients with full fixed appliances (Begg Light Wire) were monitored over a period of 12 months during active treatment for loose molar bands. Failures for each cement were: Fuji I, 2.5 percent, Fuji II, 4.5 percent, Ketac-Cem, 4.0 percent and Hy-Bond Luting, 3.0 percent. Chi squared tests showed no statistical difference in failure rates for each cement.

Dental Bonding↗
PubMed2001

Initial tissue response to anti-washout apatite cement in the rat palatal region: comparison with conventional apatite cement.

Initial tissue response to anti-washout apatite cement (aw-AC) in the palatal region was studied. Conventional apatite cement (c-AC) was employed as a control material. Bone defects generated in the rat palatal region, where complete hemostasis is difficult to effect, were filled with both cement types and examined histologically for up to 8 weeks. At 1-week postfilling, a portion of the c-AC had washed out, resulting in slight inflammation and severe foreign-body response. The degree of foreign-body response to c-AC was reduced over time; however, foreign-body response continued to be in evidence 8 weeks after surgery. As a result, poor bone formation was observed in the case of c-AC at 8 weeks post-surgery. In contrast, aw-AC set well, maintained its shape at implantation, and caused little foreign-body response. Osteoblasts were observed at 2 weeks following surgery. Moreover, the bone defect was completely covered with new bone at 8 weeks post-surgery. This observation suggests that aw-AC may be used without complication in cases where complete hemostasis is difficult to achieve, that is, where the use of c-AC is contraindicated.

Animals↗
PubMed1995

Does vacuum mixing of bone cement affect heat generation? Analysis of four cement brands.

Four different brands of bone cement (Palacos R, Simplex P, Sulfix, CMW 1) were tested for exothermic changes during polymerization at atmospheric pressure and under partial vacuum of 0.2 bar. Palacos R was also mixed at four pressure levels (1.0, 0.2, 0.12, and 0.05 bar). The peak temperature in the bone cement was 46 to 124 degrees C, depending on the measuring point. There was no difference in peak temperature or duration of temperature increase above 50 degrees C during the curing of cement whether mixed at atmospheric pressure or under partial vacuum at different pressure levels.

Biocompatible Materials↗
PubMed2003

Histological findings of the femoral bone after cement removal in hip revision. An experimental study of cadaver femurs with two different cement removal procedures.

Cement removal in hip revision arthroplasty is often a time-consuming procedure, lengthy and tedious. Intraoperative bone damage is one of the more common complications. In the present study, the conventional cement removal method is compared with a new method by means of a histological study concerning potential negative effects to cortical or spongious bone. Histological studies on human cadaver femurs demonstrate no deleterious effects on the endosteal bone when cement was removed with this new device. The ballistically driven chiselling system (OrthoClast) is safe to the bone stock and shows no increased risk of bone damage over the conventional technique with mallet and chisel.

Arthroplasty, Replacement, Hip↗
PubMed1991

Calcium phosphate cements: effect of fluorides on the setting and hardening of beta-tricalcium phosphate-dicalcium phosphate-calcite cements.

Increasing amounts of fluoride ions have been found to increase the setting and hardening rates of beta-tricalcium phosphate-dicalcium phosphate dihydrate-calcite cements. Thus, fluoride-containing cements reached a diametral strength of about 1.5 MPa after 15 d, but the fluoride-free reference sample reached only 0.45 MPa. The acceleration of setting and hardening is correlated to an increased rate of hydroxyapatite formation in the cement at the expense of dicalcium phosphate dihydrate and calcite. Adding monocalcium phosphate monohydrate and fluoride to the blends resulted in a marked decrease of their setting time from about 1 h down to 8 min, without greatly affecting their final strength.

Apatites↗
PubMed1995

Effect of improved cementing techniques on the longevity of fixation in revision cemented femoral arthroplasties. Average 8.8-year follow-up period.

Forty-six revision cemented femoral arthroplasties in which second-generation cementing techniques were used have been reviewed. After an average follow-up period of 8.8 years, 91% of the femoral components remained in place and 87% remained well fixed. Only 7% were rerevised for aseptic loosening. These results demonstrate a marked improvement over those of first-generation cementing techniques.

Adolescent↗
PubMed1995

Total hip arthroplasty cemented femoral component distal stem centralizer. Effect on stem centralization and cement mantle.

The effectiveness, benefits, and potential risks of employing a total hip arthroplasty cemented femoral component distal centralizer were evaluated. First postoperative (6-week) radiographs of 100 primary hybrid total hip arthroplasties in consecutive groups of 50 patients without and 50 patients with a femoral stem distal centralizer were retrospectively reviewed. Femoral stems with a distal centralizer were more centralized within the femoral canal (center of stem tip to center of intramedullary canal: mean, 1.1 mm with a centralizer, 3.2 mm without; P<.0001) and more neutrally aligned (mean, 0.7 degrees valgus with a centralizer, 1.3 degrees valgus without; P < .01). Femoral stems with a distal centralizer were less likely to have a cement mantle with suboptimal thickness, that is, less than 2 mm at the medial distal femoral stem (3 of 50 stems with a centralizer, 22 of 50 stems without; chi-square, P<.0001). There were no complications, adverse effects on the cement mantle, radiographic evidence of loosening, or implant failures associated with the use of a distal centralizer, with a minimum follow-up period of 2 years.

Aged↗
PubMed1986

The impact of modern cement techniques on acetabular fixation in cemented total hip replacement.

A radiographic study was performed to assess acetabular fixation in 78 total hip replacements performed between 1971 and 1980. In 1979, the technique of acetabular component insertion was modified to include water-pik lavage, preservation of subchondral bone of the acetabulum during reaming, multiple fixation holes in the pubis ischium and ilium, and devices that improve pressurization of the cement into the cancellous bone surfaces. The impact of these techniques was studied. A cumulative radiolucency score was calculated for each acetabulum from 5-year follow-up radiographs, and the mean cup radiolucency scores for two chronologic groups were compared using the t-test for independent samples. No significant differences in patient age, weight, or sex, type of prosthesis, or approach used was found between groups. The acetabular components inserted between 1979 and 1980 had significantly lower cup radiolucency scores than those inserted between 1971 and 1978, at 5-year follow-up evaluation. Modern cement technique may be responsible for significantly enhanced durability of acetabular fixation in cemented total hip replacement.

Acetabulum↗
PubMed1988

Revision of nonseptic, loose, cemented femoral components using modern cementing techniques.

A series of 43 hips (41 patients) in which a cemented revision arthroplasty was performed for a symptomatic, nonseptic, loose (42) or broken (1) femoral component was reviewed clinically and radiographically. The operation was done using femoral components of contemporary design, a trochanteric osteotomy, a cement gun, and a PMMA femoral plug. The femoral compactor and water pic were used once they became available (36%). The average follow-up period was 74 months (range, 60-111 months). The primary diagnoses included osteoarthritis (52%), CDH (32%), posttraumatic arthritis (6%), AVN (6%), and SCFE (4%). The average age of the patients at the time of the operation that failed was 52.2 years and at revision was 57.4 years. Only one revised cemented femoral component (2% of hips) required rerevision surgery for septic loosening. The average postoperative Harris hip score was 87 points. Four hips (9%) were classified radiographically as definitely loose, one (2%) as probably loose, and one (2%) as possibly loose, but all of these patients had a good or excellent clinical rating. Complications included deep venous thrombosis in 16 patients, trochanteric nonunion in 3 hips, femoral shaft perforations in eight hips, and postoperative dislocations in 6 hips. These techniques appear to represent an improvement over prior techniques.

Cementation↗
PubMed1996

Cemented total hip arthroplasty in patients with osteonecrosis. A 6-year minimum follow-up study of second-generation cement techniques.

Twenty patients with osteonecrosis of the femoral head underwent 28 total hip arthroplasties using cement from 1981 to 1985. Femoral reconstruction was by use of second-generation cement techniques. Twenty-four hips in 17 patients were available for review at a mean follow-up period of 7.7 years. The mean age at surgery was 55 years. Clinical evaluation demonstrated 79% excellent, 4% good, and 4% fair results. Three hips (12.5%) required revision for loosening. The cumulative probability of survival was estimated to be 85.7% at 10 years. Second-generation cement techniques and implant designs did improve the clinical results in this high-risk group; however, the overall mechanical failure rate remained high.

Adult↗