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At least 883 records · Page 49Linked to original sources
PubMed1993

Gingival recession in relation to history of hard toothbrush use.

Gingival recession studies in the U.S. have related primarily to sex and age with little consideration of toothbrush hardness. This preliminary study examined the relation between a history of hard toothbrush use and gingival recession. A total of 182 subjects, male and female, between 18 and 65 years of age, with a minimum of 18 natural teeth, no advanced periodontitis or history of periodontal surgery were examined. Gingival recession was scored as present whenever the free gingival margin was apical to the cemento-enamel junction and root surface was exposed. History of hard toothbrush use was ascertained. Eighty-two subjects had a history of hard toothbrush use, 77 did not, and 23 did not know. The percentage of subjects with recession increased with age from 43% to 81%, with a figure of 63% for all age groups combined. Males tended to show slightly greater levels of recession than females. Regression analysis showed that females had about 4 percentage points less receded surfaces than males. Recession was also found to be more pronounced for subjects with a history of hard toothbrush use, with a mean of 9.4% receded surfaces versus 4.7% for those who had never used a hard brush. For users of hard toothbrushes, the percent of surfaces with recession showed a significant and dramatic increase with increasing brushing frequency; this effect did not exist for those without a history of hard brush use. The relation with age was highly significant, with regression analysis showing that the percent of surfaces with recession tends to increase about 3.5 percentage points per decade.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1994

Autogenous gingival grafts as epithelial barriers for immediate implants: case reports.

The purpose of this study was to evaluate the use of autogenous gingival grafts as barriers for endosseous implants placed directly into fresh extraction sockets. This study consisted of four patients who presented with hopeless teeth due to endodontic pathology, caries, or root resorption. In all cases, the teeth in question were extracted at the Stage 1 surgery. An endosseous root form implant was immediately placed into the extraction socket in each case. As a consequence of immediate placement, there was a lack of primary closure over the fixture and a large space was present between the fixture and the remaining alveolus. An autogenous gingival graft was sutured in place to cover the fixture and act as a physical barrier to epithelium, food debris, and possibly bacteria. At the Stage 2 surgery, all implants achieved complete osseointegration clinically and radiographically. The results at 16 to 24 months reveal continued success in all four cases. This report demonstrates the potential of autogenous gingival grafts in immediate implant placement. A clinical trial to fully assess the potential of this procedure is recommended.

Adult↗
PubMed1996

Oral health of Singapore adults.

In a study conducted by the Dental Division of the Ministry of Health in 1992, 3157 Singapore adults aged 20 to 65 years and over were interviewed on their knowledge, attitude and practice of dental care and given an examination. About 66% indicated they required dental treatment. Utilisation of dental services was low with 39% visiting the dentist at least once in 2 years. About 72% brushed their teeth morning and night. The dental examination showed that 79.2% had calculus, 92% needed prophylaxis and oral hygiene instruction and only 0.2% needed complex periodontal treatment. A large proportion (96.6%) of the sample was dentate. The mean DMFT was 10.7 and the mean number of decayed root for the dentate population was 0.2. The age-group 65 years and over had the highest percentage (63.6%) of persons wearing dentures and the age group 50-54 years had the highest percentage (54.2%) requiring dentures. This study has shown that oral health promotion for home and professional care should be stressed to the adult population, particularly the older age groups.

Adolescent↗
PubMed1997

[Binding of oral lactobacilli to collagen].

The present study surveyed the ability, the characters and the influential factors on lactobacilli binding to the collagen. The experiment employed reference strains and fresh isolated strains. Binding of 3H-labeled bacteria to human type I collagen absorbed on hydroxyapatite surface (C-HA) was tested. The results suggested that the lactobacilli had high affinity for collagen. Competitive inhibitory assay indicated the attachment was highly specific. Binding to C-HA occurred in a collagen dose-dependent manner. pH value of reaction mixtures significantly affected the adherence. Below pH 6.5, increasing pH value caused a reduction of binding. Above pH 6.5, the binding was less affected. The ionic strength apparently influenced the binding level. The results of this study revealed one of the mechanisms that oral lactobacilli target dentin and root surfaces caries. This may also be a cariogenic virulent factor of lactobacilli.

Bacterial Adhesion↗
PubMedDate not supplied

Development of gingival esthetics in the terminal dentition patient prior to dental implant placement using a full-arch transitional fixed prosthesis: a case report.

Despite significant advances in dental therapeutics, there are patients for whom no reasonable treatment is available that will reliably restore or maintain their existing dentition. The causes of future edentulism include advanced caries, failing root canal therapy, inadequate numbers of teeth to support a fixed prosthesis, untreatable periodontal disease, or a history of failed previous rehabilitations. For these patients, dental implants may provide a more predictable future than retention of their remaining teeth. It is proposed that transitional fixed prostheses designed specifically for a patient with terminal dentition offer the advantage of maintenance and development of proper gingival esthetics with improved function. Prior to implant placement, the gingival frame is established, enhancing the overall appearance of the final, full-arch implant rehabilitation. The specific prosthodontic and surgical techniques required for successful treatment of these patients are presented.

Acrylic Resins↗
PubMed2000

Effectiveness of two fluoride dentifrices to arrest root carious lesions.

PURPOSE: To compare the effectiveness of Prevident 5000 Plus (5,000 ppm F) and Colgate Winterfresh Gel (1100 ppm F) to arrest root carious lesions. MATERIALS AND METHODS: 201 subjects with at least one root carious lesion were recruited from dental school patients. They were randomly assigned to use either Prevident 5000 Plus (5000 ppm F) or Colgate Winterfresh Gel (1100 ppm F) as sodium fluoride in the same silica base. Measurements of lesion hardness, area, distance from the gingival margin, cavitation and plaque were recorded at baseline and after 3 months by a single examiner. RESULTS: After 3 months 38% of subjects using Prevident 5000 Plus and 10% using Winterfresh Gel had one or more lesions that had become hard (P < 0.001). Non-cavitated lesions at baseline were more likely to become hard than cavitated lesions. Compared to the Winterfresh group there was significant increase in the distance from the base of the lesion to the gingival margin and plaque scores were reduced in those using Prevident 5000 Plus.

Adult↗
PubMedDate not supplied

Extent of the cariostatic effect on root dentin provided by fluoride-containing restorative materials.

This study evaluated the extent of the cariostatic effect on root dentin provided by four fluoride-containing restorative systems: Ketac-Fil/ESPE [Ke], Fuji II LC Improved/GC Corp [Fj], Dyract AP/Dentsply [Dy] and SureFil/Dentsply [Su], and one without fluoride: Z250/3M [control]. Ninety-five bovine root dentin fragments (5.0 x 6.0 mm) were obtained, embedded in polyester resin and planed. Cavities (1.5 x 3.5 x 1.0 mm) were made and restored by the five restorative systems (n=19) in a randomized complete block design according to the manufacturers' instructions. After 24 hours, the dentin/restoration surface was polished. The restoration surface and an adjacent area of 3.0 x 3.0 mm were demarcated and submitted to a pH-cycling model. Dentin surface Knoop microhardness values were obtained (5.0-g, 5.0-s) for 10 distances: 50, 100, 150, 300, 600, 900, 1200, 1500, 1800 and 2100 microm from the margin of the restoration. The dentin microhardness means for each restorative material at each distance was considered by the ANOVA multi-factor split-plot method. The interaction between the restorative system and distance was statistically significant (p<0.05). The Tukey test and the regression analysis showed that the means of [Ke] and [Fj] were similar up to 300 microm, the [Ke] means being higher than the [control] at distances 50, 100, 150 and 300 microm. The [Fj] means were higher than the [control] at distances 50, 100 and 150 microm. The microhardness means of [Dy] and [Su] were not statistically different from the [control] and remained steady throughout the studied distances. This study concluded that the extent of the cariostatic effect on root dentin was 300 microm for [Ke] and 150 microm for [Fj]. [Dy] and [Su] did not show any cariostatic effect.

Analysis of Variance↗
PubMed2003

A comparison of the retention of tooth-colored posts.

OBJECTIVE: The aim of this in vitro study was to compare the retention of five different esthetic post systems of similar dimensions in extracted teeth using titanium posts as controls. METHOD AND MATERIALS: Sixty recently extracted single-rooted, caries-free teeth were sectioned horizontally and mounted in acrylic resin. The samples were randomly allocated into six groups of 10 for post preparation. Post space preparation was carried out according to the individual manufacturer's instructions. All posts were bonded using Panavia F. A 4-mm hollow, metal sleeve was luted over the free end of each post prior to mounting in a universal testing machine, and the forces required to dislodge the posts using a cross-head speed of 5 mm/min were recorded. RESULTS: It was found that the parallel-sided Lightposts were significantly more retentive than all of the other posts. Parapost Fibrewhite posts were more retentive than tapered Lightposts and Snowposts. There was no significant difference between the retention of stainless steel Paraposts and any of the other groups. CONCLUSIONS: Serrated parallel-sided stainless steel posts were no more retentive than either parallel-sided or tapered tooth-colored posts in this study. When all groups were considered, post dimension appeared to influence retention, with parallel-sided posts being more retentive than tapered posts.

Ceramics↗
PubMedDate not supplied

Conservative restoration of proximal-cervical lesions.

One of the authors has used this technique successfully for the past three years in various clinical situations that involve both difficult access anterior and posterior teeth. This is a tooth-structure conserving clinical procedure that can provide a simplified approach for restoring otherwise difficult clinical lesions.

Dental Cavity Preparation↗
PubMedDate not supplied

Modified matrix adaptation for sub-gingival Class II amalgam restorations.

Proper placement of the matrix and wedge is critical for the success of Class II amalgam restorations. Improper placement of matrix and wedges can result in poor contours or contacts, overhangs or weakness resulting from poorly condensed restorative material. This paper presents a technique for adaptation of a combination of matrix bands in cases where the gingival cavosurface margin extends deep sub-gingivally.

Dental Amalgam↗
PubMedDate not supplied

Selected issues on care and management of the ageing patient: 2. Prevention and treatment.

The elderly are a vulnerable group of patients in whom even simple dental care can become invasive and require the use of a local anaesthetic. Part 1 assessed the factors which may influence the ability of the patient to receive treatment and established treatment priorities. It also described the particular problems that may arise when dealing with the elderly and indicated the adjustments of a practice which would help in the care of these patients. Part 2 will now discuss prevention and treatment.

Aged↗
PubMed1992

Dentin adhesives and microleakage in cervical resin composites.

This paper reports the effect of dentin bonding agents on marginal leakage in cervical cavities without the classical cavity preparation design. Wedge-shaped cervical cavities were cut on extracted teeth with the gingival cavosurface margin of each cavity involving dentin. The specimens were randomly assigned to three groups of 40 each: Group 1 (control), restored with Fuji glass ionomer; Group 2, restored with Scotchbond 2 adhesive and Silux Plus resin and Group 3, restored with Tenure adhesive and Perfection resin. Half of the specimens in each group were thermocycled. All specimens were then stored in basic fuchsin dye after which microleakage of the restorations was assessed by dye penetration. A grading scale of 0 to 3 was used as the scoring criteria. The results showed that differences were more pronounced at the gingival margin. The control group specimens exhibited the least microleakage. There was no significant difference between thermocycled and non-thermocycled specimens for each category of materials used. There was, however, a significant difference between the experimental groups and the control groups. The dentin adhesives tested did not completely eliminate microleakage at the gingival margin of cervical cavities.

Analysis of Variance↗