Publications by authors named "Renton-Harper P"

Background And Aims: Laboratory robots can reveal differences in the cleaning of artificial tooth surfaces by different electric toothbrushes. The primary aim of this study was to establish, through video instruction, a panel of experts in tooth cleaning with an oscillating rotating electric toothbrush in an attempt to mimic the highly reproducible laboratory robot. A secondary aim was to use the "expert" panel, in an attempt to distinguish between tooth cleaning efficacy of 4 head/model combinations of the oscillating rotating electric brush.

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Background: Individuals purchasing electric toothbrushes for the 1st time will mostly only have the manufacturer's instructional leaflet for information of usage.

Aims: This study was designed to simulate the 1st-time purchase and early use of an electric toothbrush with the aim of comparing plaque removal with a manual toothbrush. Secondary aims were to assess chemical plaque removal effects of a toothpaste slurry and to compare between 2 electric brushes which differed only in head speed.

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A previous crossover study showed that a watch-and-follow instructional video improved plaque removal by an electric toothbrush compared to the use of the instructional leaflet. This study employed a parallel design to assess the value of an instructional video for plaque removal by a new model oscillating/rotating/reciprocating electric toothbrush. 2 groups of 26 dentate subjects with average oral hygiene, who had never used an electric toothbrush, participated in this single blind, randomised parallel group designed study.

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Plaque areas recorded graphically or photographically provide a permanent record of plaque accumulations on teeth at a moment in time. As such, these records could be re-evaluated and converted into other index scores. The purpose of this study was to determine the reproducibility of scoring a plaque index from previously recorded plaque areas and to compare such scores with the original scores of the same index.

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Instructions on the use of electric toothbrushes are usually derived from the written and/or diagrammatic leaflets provided with the device or perhaps less often instruction from a professional. Videos are now widely used for information transfer and the direction of physical activities. The aim of this study was to determine whether video instruction in the use of an electric toothbrush could promote efficient use of the device.

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A large number of plaque-scoring methods exist for the evaluation of plaque inhibition by oral hygiene agents, products or devices. The ability of such methods to discriminate between high and low plaque scores has not been compared. In this retrospective analysis, the F-ratios for differences between treatments for plaque index and area were compared from 15, 4-day plaque regrowth studies.

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Home use studies to evaluate oral hygiene products often standardise the time lag between plaque scoring and the previous toothbrushing. Most protocols have favoured an evening before brushing regimen, but the rationale and even the validity of this approach has not been evaluated. In this study, a group of 30 adult subjects participated in a 4-period randomised single-blind crossover evaluation of within-subjects and between-subjects variation in plaque levels after two different brushing times.

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Plaque indices have largely been developed for buccal and lingual tooth surfaces. There has been minimal interest in plaque accumulation on occlusal surfaces despite the predilection for caries at these sites. A numerical plaque index (0-5) is described based on the presence and distribution of plaque in the fissures and over the occlusal surfaces of permanent molar and premolar teeth.

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There has been a resurgence of interest in stannous fluoride (SF) products in particular to provide oral hygiene and gingival health benefits. The aim of this study was to assess the persistence of antimicrobial action of a number of SF formulations in the mouth and relate these to plaque inhibitory activity. The formulations were 2 SF toothpastes (SF1, SF2), 2 SF plus stannous pyrophosphate toothpastes (SFSP1, SFSP2), a SF gel (G), a NaF toothpaste (C) and saline (S) as control.

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There are a large number of mouthrinse products available to the general public for use as adjuncts to oral hygiene. Many have not been evaluated and relatively few comparisons of products have been made. This study compared 4 mouthrinse products containing cetylpyridinium chloride (CPC), chlorhexidine, C31G, or triclosan with saline rinse included as a placebo control.

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Periodontal disease appears to arise from the interaction of pathogenic bacteria with a susceptible host. The main aims of disease management have been to establish a high standard of oral hygiene and to professionally and thoroughly debride the root surface Chemical agents could be considered for both aspects of management. Chemoprevention using supragingivally delivered agents such as chlorhexidine may be questioned for value in the pre-treatment hygiene phase but have well-established efficacy immediately preoperatively and during the post-operative weeks.

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Eighteen per cent of all patients have some degree of sensitivity and a range of therapies has been devised to alleviate this condition. An electronic monitoring machine was constructed which allowed for air stream, directed at a patient's tooth, to be started by the clinician and halted by the patient when the sensation of pain in the tooth became too unpleasant to tolerate. The time for which the patient could tolerate the air flow was electronically measured in units of 1/50th second.

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Clinical lasers are of two types; soft lasers are essentially an aid to healing with relatively few rigorous studies available to support their use. Surgical hard lasers, however, can cut both hard and soft tissues and replace the scalpel and drill in many areas. From initial experiments with the ruby laser most clinicians are using Argon, CO2 and now NdYAG systems.

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