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Comparative laboratory evaluation of two new toothbrushes regarding interproximal access efficacy.

The Colgate Precision toothbrush and the Crest Complete toothbrush were compared using a laboratory device designed to simulate clinical toothbrushing motions and pressures, allowing measurement of interproximal access efficacy. The toothbrushing time was sixty seconds for each vertical or horizontal toothbrushing motion and for each of the three brushing weights tested (250, 500 or 750g). Interproximal access efficacy was determined by measuring the maximum width of the brushing stroke on pressure-sensitive paper placed around simulated anterior or posterior-shaped teeth. Twenty-four toothbrushes of each design were evaluated for each toothbrushing motion, tooth shape and toothbrushing weight for a total of 576 measurements. Using vertical toothbrushing motions the Colgate Precision toothbrush had significantly higher (p < 0.01) interproximal access efficacy mean values, compared to the Crest Complete toothbrush on both anterior and posterior tooth shapes and at each of the brushing weights tested. Using the horizontal toothbrushing motion on anterior-shaped teeth, the interproximal access efficacy for the Colgate Precision toothbrush was significantly greater (p < 0.05) than the Crest Complete toothbrush at 750g of brushing weight. With horizontal toothbrushing across posterior-shaped teeth, interproximal access efficacy values for the Colgate Precision toothbrush were significantly greater (p < 0.01) than the Crest Complete toothbrush at the 250, 500 and 750g brushing weights tested.

Analysis of Variance↗

Comparative laboratory evaluation of three toothbrushes regarding interproximal access efficacy.

A new toothbrush from the Colgate-Palmolive Company, called the Colgate Precision toothbrush, was compared to the Oral-B 40 toothbrush and Reach Full-Head soft toothbrush using a laboratory device designed to simulate clinical toothbrushing motions and pressures. The toothbrushing time was sixty seconds for each vertical or horizontal brushing motion and for each of the three brushing weights tested, 250, 500 or 750 grams. Interproximal access efficacy was determined by measuring the maximum width of the brushing stroke measured on pressure sensitive paper placed around the simulated anterior or posterior teeth. Twenty-four toothbrushes of each design were evaluated for each toothbrushing motion, tooth shape and toothbrushing weight for a total of 864 measurements. In all studies conducted, the Colgate Precision toothbrush had statistically superior total interproximal access efficacy scores compared to the Oral-B and Reach toothbrushes. In several assessments the Reach toothbrush was superior to the Oral-B 40 toothbrush.

Analysis of Variance↗

The clinical effectiveness of a novel power toothbrush and its impact on oral health.

This review details the invention and clinical testing of a new power toothbrush designed to provide a low cost, effective toothbrush, which has a combination of a round oscillating head in conjunction with fixed bristles. The data demonstrate this power toothbrush (Crest SpinBrush) is an effective cleaning toothbrush with respect to plaque removal. Four independent 4-period crossover studies, where subjects used each brush twice, have demonstrated that brushing with this power toothbrush results in 10-40% greater plaque removal relative to a series of control manual toothbrushes. Separate research has confirmed that adults and children tend to brush longer, 35.8% and 38.3% respectively, when using this power toothbrush relative to manual toothbrushes. In addition, it has been shown to be superior to a battery-powered toothbrush (Colgate ActiBrush) in two independent studies and has demonstrated comparable efficacy to a leading powered toothbrush (Oral-B Ultra Plaque Remover). In parallel, this power toothbrush has also been shown to be safe relative to manual and power toothbrushes.

Adult↗

[Gingival abrasion and plaque removal with manual vs. electric toothbrushes].

In a clinical study, the relative incidence of gingival injuries after standardized tooth brushing was tested by 22 volunteer dental assistants whose teeth were brushed with a soft multi-tufted toothbrush, a manual V-form toothbrush, and an electric toothbrush. At the beginning of the study, a dental hygienist cleaned the right or left side of the jaw of each subject with a manual V-form toothbrush or an electric toothbrush; the other side was manually cleaned with a multi-tufted toothbrush. At the second cleansing one week later, the same dental hygienist cleaned the side contralateral to that brushed in the first test week with the multi-tufted brush; the manual V-form brush was used instead of the electric toothbrush and vice versa. The number of new gingival lesions was recorded after each brushing. The cleansing effect was established by determining the amount of residual plaque. The subjects did not know which type of toothbrush was used to cleanse the evaluated side of the jaw. The results showed that the manual V-form toothbrush abraded the gingiva more than the electric toothbrush (p less than 0.005). A similar difference was found between the manual multi-tufted and the electric toothbrush (p less than 0.05). No significant differences could be established with respect to the plaque-removing properties of the three types of toothbrush tested.

Dental Plaque↗

A study of gingival irritation and plaque removal following a three-minute toothbrushing.

Twenty-five subjects were assessed for plaque and soft tissue safety monitored by gingival irritation the first thing in the morning of day one following no toothbrushing for 12-14 hours. Subjects then brushed with either the Dentrust (manual toothbrush), Crest Complete (manual toothbrush) or Interplak (mechanical toothbrush) for a timed three minutes under supervision. The toothbrush assignments were by a table of random numbers. Following brushing, the subjects were assessed immediately for levels of plaque and gingival irritation. The subjects were then recalled three hours later for another assessment of plaque levels and residual gingival irritation from the morning toothbrushing. After three or four days the subjects were recalled to test an alternate toothbrush. Three or four days later the subjects were recalled to test the final toothbrush. Levels of irritation severity were evaluated using standard soft tissue examination procedures, and after rinsing with disclosing solution and photography, with subsequent blind judging of stain intensity and area on the gingiva by a panel of three experienced investigators. In the first morning assessment there was no significant difference among plaque or gingival appearance or stain uptake levels of the three groups before using the three toothbrushes. Immediately following toothbrushing, the three groups exhibited similar levels of plaque removal and clinical or stain-related gingival irritation. There was no significant statistical difference among the plaque or safety evaluations, although the Interplak toothbrush demonstrated higher irritation levels judged by stain uptake than the manual toothbrushes.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

Effectiveness of a sonic toothbrush in maintenance of dental implants. A prospective study.

This study assessed the efficacy of a sonic and a manual toothbrush in reducing plaque and gingivitis around dental implants. Subjects were randomly assigned to either sonic (n = 16) or manual (n = 15) study groups. Groups were balanced according to baseline levels of plaque and gingivitis. The plaque (PI), gingival (GI), and bleeding (BI) indices as well as probing depths were determined at baseline, and at 4, 8, 12, and 24 week follow-up visits. Mean scores per person were calculated for each clinical parameter. Oral hygiene habits, compliance and acceptance were also evaluated over the study period. Within group comparisons from baseline throughout the study, as well as between group comparisons (i.e., sonic versus manual), were determined. Overall, plaque, gingival, and bleeding indices in both groups were lower at each follow-up visit when compared to the baseline. Within group comparisons demonstrated that both the sonic toothbrush subjects and the manual toothbrush subjects had significantly lower PI, GI, and BI scores at each post-baseline visit (4, 8, 12, and 24 weeks) than at baseline (p<0.005). In addition, the sonic toothbrush subjects also had significantly lower probing depths at each post-baseline visit than at baseline (p < 0.005). Between group comparisons demonstrated that the sonic toothbrush subjects over time had significantly lower PI and BI scores around dental implants than the manual toothbrush subjects (Repeated measures MANOVA; PI, p = 0.01; BI, p = 0.017). The sonic toothbrush subjects had lower GI scores and reduced probing depths over time when compared to manual toothbrush subjects but these scores were not statistically significant (GI; probing depth, p > 0.05). No implant problems (e.g., loose screws) were attributable to the sonic toothbrush. Relevant to oral hygiene habits, subjects in both groups demonstrated a high level of compliance with their assigned toothbrush. Overall, the results of this study demonstrated that sonic toothbrushing significantly reduced plaque, gingival inflammation and bleeding, and probing pocket depths around implants over the 6-month trial period. It is concluded that sonic brushing is an effective means of dental implant maintenance.

Adolescent↗

A practice-based study of a power toothbrush: assessment of effectiveness and acceptance.

BACKGROUND: The greater effectiveness of the power toothbrush compared with a manual toothbrush is well-documented. Despite this, acceptance by dental professionals is still low. METHODS: This general practice study evaluated the effectiveness of a power toothbrush (Braun Oral-B Ultra Plaque Remover, Braun GmbH) in 16,903 patients, based on the clinical opinions of dental professionals in regard to patients' changing oral health status. In addition, a survey assessed the attitudes of dental professionals and patients toward the power toothbrush. RESULTS: The power toothbrush was considered by dental professionals to have had a positive effect on the oral health of 80.5 percent of their patients; the noticeable benefits with respect to a number of clinical criteria included plaque removal and improved gingival condition. Most patients in the study (88.9 percent) reported that they would continue using the power toothbrush once the study was completed. At the end of the study, many more dentists and hygienists considered the power toothbrush to be the most effective way of brushing, and almost 70 percent said that they would now be more likely to recommend a power toothbrush to their patients. CONCLUSIONS: The power toothbrush improved the oral health of patients in this practice-based study, and the number of dental professionals who said they would recommend a power toothbrush increased markedly during the study. CLINICAL IMPLICATIONS: Enabling dental professionals to evaluate the effect of a power toothbrush reinforces the findings from controlled clinical studies and increases their awareness of its potential to improve oral hygiene.

Adolescent↗

[Studies on bacterial contamination of chlorhexidine coated filaments of the toothbrush].

The purpose of the present investigation was to determine bacterial contamination of chlorhexidine coated and uncoated (normal) nylon filaments of toothbrushes. Ten healthy subjects were employed in this study and the test toothbrush of four lines and thirty-eight tufts were used twice a day. Test periods were 1, 8, and 20 days for each filaments of toothbrush and after they brushed the used toothbrush was kept at the constant condition (20 degrees C, 65% RH). After each test period, those toothbrushes were immediately collected and kept at the same condition for drying. After 0, 3, 6, 9, and 24 hours of drying, two tufts of filaments were pulled out from the toothbrush and cutted into two parts (end- and root-side of tufts) by sterile scissors. Each cutted part of filaments was washed with PBS and the aliquots was incubated on Brucella blood agar plate at 37 degrees C for 48 hours. The number of bacteria attached to filaments was enumerated. The results were as follows: 1. The number of bacteria attached to both end- and root-sides of chlorhexidine coated filaments decreased with the time of drying. 2. At the root-side of the normal filaments, the number of contaminated bacteria increased with the test periods. 3. The isolated bacteria from tested toothbrushes were mainly gram positive at shorter period, however, gram negative rods were also found at longer period. 4. The anti-bacterial activity of the end-side of chlorhexidine coated filaments diminished at eight days of the use, however, their activity at the root-side still remained even at twenty days. From these results, it was clear that the bacterial contamination of toothbrush was affected by several factors such as the condition of drying, the site of tufts, the using period of toothbrush and so on. To prevent this problem, it is important to keep it at good storage condition and to change it periodically. The developed chlorhexidine coated filaments of the toothbrush also indicates to be one of the useful way for prevention of bacterial contamination of toothbrush.

Chlorhexidine↗

The influence of toothbrush wear on the variables of plaque and gingivitis in clinical trials.

Although toothbrush wear has been shown not to be critical in ensuring optimal plaque removal, the degree of toothbrush wear occurring in a clinical trial may influence the results of the trial. The aim of this study was to determine the effects of toothbrush wear on the clinical variables of dental plaque and gingivitis. There were 107 subjects who participated in this six-month clinical trial in which plaque and gingivitis scores were assessed in relation to toothbrush wear at 2, 4, 12 and 24 weekly intervals. At each appointment, the toothbrushes being used were assessed for wear and replaced if necessary. It was found that 58% of the group were "rapid," and 42% were "slow" wearers. Of the group, 18.6% required replacement toothbrushes within two weeks from baseline with 50.9% of replacement toothbrushes being issued within four weeks of the start of the trial. Two subjects required as many as 10 replacement toothbrushes over the six-month trial period. "Slow" wearers had significantly lower plaque scores than "rapid" wearers at weeks 4 and 12, whereas the "rapid" wearers had significantly lower gingivitis scores than "slow" wearers at weeks 2 and 4. Clinical results show that significant toothbrush wear patterns of individuals participating in clinical trials should be taken into account when designing clinical trials assessing plaque and gingivitis scores. It may be necessary to exclude "rapid" toothbrush wearers from clinical trials that assess plaque and its removal. As the rate of toothbrush wear varied considerably among subjects, the simple classification of subjects into "rapid" and "slow" wearers may require further subgrouping. The surprising result that "rapid" wearers achieved lower levels of gingivitis requires further study to determine if this observation is valid in clinical trials designed for this purpose.

Adult↗

Laboratory evaluations of two toothbrushes for removal of artificial plaque above, around and below the gingival margin.

OBJECTIVE: Two toothbrushes were evaluated with a laboratory method for the ability to remove artificial plaque deposits around interproximal sites (interproximal access efficacy, IAE) at the gingival margin (gingival margin cleaning, GMC), and below simulated gingivae (subgingival access, SA) using clinical toothbrushing motions under wet brushing conditions. METHODOLOGY: The toothbrushes tested were Meridol or an ADA reference standard. The Meridol toothbrush has a flat profile and contains double-tapered filaments. The ADA reference standard also has a flat profile, with traditional end-rounded bristles. Both toothbrushes have a soft texture. Six toothbrushes of each design were evaluated four times for a total of 24 assessments. RESULTS: The Meridol toothbrush had significantly (p < 0.001) higher mean IAE, GMC and SA values compared to the ADA reference standard toothbrush tested. CONCLUSION: From these results, the Meridol toothbrush with tapered bristles is more likely to be effective in clinical studies on plaque removal compared to other manual toothbrushes with rounded bristles in a flat head design, that are similar to the ADA reference standard toothbrush.

Dental Plaque↗

Clinical studies regarding the plaque removal efficacy of manual toothbrushes.

Two independent cross-over design studies were performed to compare two toothbrushes for their ability to remove plaque. In Study I, the Colgate Precision toothbrush was compared to the Oral-B 40 toothbrush; in Study II, the Colgate Precision toothbrush was compared to the Reach Full-Head soft toothbrush. A total of 54 and 72 adult male and female subjects who met the inclusion/exclusion criteria completed Study I and Study II, respectively. In each study, subjects refrained from brushing for 24 hours, and were screened for dental plaque on the facial and lingual surfaces of all natural teeth, using the Rustogi, et al. index. Based on mean scores and number of teeth, qualifying subjects were randomly assigned to one of two groups. Subjects were then scheduled to return one week later, having again abstained from all oral hygiene procedures for a 24-hour period. At this visit, each subject was evaluated for plaque, then brushed with his/her assigned toothbrush for sixty seconds, and was again scored for plaque after brushing. Subjects were instructed to resume their normal routine and return to the clinical site one week later. At this visit, a different test toothbrush was assigned to each group in a cross-over design. Plaque evaluations and toothbrushing procedures were again performed. In both studies, the Colgate Precision toothbrush was significantly more effective (p < 0.01) than either the Oral-B 40 toothbrush or the Reach Full-Head soft toothbrush in reducing whole mouth plaque scores, plaque scores at the gumline, and plaque scores at interproximal areas.

Adult↗

Laboratory and clinical evaluations of the Jordan Exact toothbrush.

A new toothbrush, the Jordan Exact, has been compared with a flat multitufted toothbrush, the Oral-B 35 toothbrush. In a laboratory study the Jordan Exact toothbrush had significantly higher interproximal access, compared to the Oral-B 35, combining all toothbrushing pressures tested, using either vertical or horizontal brushing motions on simulated molar teeth. Clinical safety and efficacy were evaluated in a 30-day single blind study. Evaluations of plaque mean scores were recorded before and after a one minute brushing at baseline, day 15 and day 30. At the same time periods, assessments of irritation, gingivitis and bleeding on probing were conducted. No oral irritation from either toothbrush was observed or reported throughout the test period. At all examinations there were no significant differences in overnight plaque scores. After brushing, an analysis of covariance on plaque area scores revealed that the Jordan Exact toothbrush removed significantly more plaque than the Oral-B 35 toothbrush. By day 30, the Jordan Exact toothbrush significantly reduced gingivitis on buccal surfaces but no significant change was observed in the Oral-B 35 group. Subjects using the Jordan Exact toothbrush had a significant decline in bleeding on probing; subjects in the Oral-B 35 toothbrush group had no significant change over the 30 days of the study.

Adolescent↗

A six-month clinical evaluation of the Dentrust toothbrush.

Clinical study guidelines have been established by the American Dental Association for assessing plaque and gingivitis reductions with chemotherapeutic agents. Two six-month studies are required. While the toothbrush is also instrumental in plaque and gingivitis reduction, there are currently no study requirements by the ADA for manual brush efficacy. It was thought to apply the long-term efficacy requirements for chemotherapeutic agents to two manual toothbrushes to assess their efficacy for comparative purposes. Forty-eight subjects using the Dentrust toothbrush and forty-five subjects using the Oral-B toothbrush completed a six-month study to assess safety, plaque removal and gingivitis reduction. The subjects were randomly assigned to use either the newly designed (three sided) Dentrust toothbrush or the traditional flat-headed toothbrush. The subjects took their respective toothbrushes home following a baseline evaluation, and were subsequently assessed at three and six months by the same examiners with the same indices in this single-blind trial. There were no significant differences between the two groups on plaque removal during the study. At six months, the Dentrust group removed a significant amount of both buccal and lingual plaque and the flat-headed toothbrush removed a significant amount of buccal plaque only. On gingivitis the groups had no significant differences at baseline; however, by six months the Dentrust group was significantly better than the flat-headed toothbrush on gingivitis reduction. Long-term use of the Dentrust toothbrush can be said to significantly contribute to gingival health overall, and especially in the hard to reach lingual areas compared to long-term use of a traditional flat-head toothbrush.

Adolescent↗

Effect of brushing with sonic and counterrotational toothbrushes on the bond strength of full veneer crowns.

STATEMENT OF PROBLEM: Earlier studies on orthodontic brackets have shown a loss of bond strength after a sonic toothbrush was used. PURPOSE: This in vitro study evaluated the difference in bond strength of single complete veneer crowns after being subjected to the equivalent of 2 years of brushing with sonic and counterrotational toothbrushes. MATERIAL AND METHODS: Complete gold crowns were fabricated with a conventional indirect technique for 30 extracted, intact, prepared human premolar teeth. Castings were then luted to the teeth with glass ionomer cement. Teeth were randomly divided into 3 groups of 10 teeth each, 1 group to be brushed with Sonicare sonic toothbrush, 1 group to be brushed with Interplak counterrotational mechanical toothbrush, and 1 group as the control. Groups 1 and 2 were then brushed for the equivalent of 2 years per tooth. A uniform force of 50 g for the sonic toothbrush and 120 g for the counterrotational toothbrush was used. Control specimens were not brushed. Brush heads and sample teeth in contact with the toothbrush were kept moist at all times. Tensile dislodgment force was determined with an Instron universal testing machine. RESULTS: The castings brushed with a sonic toothbrush required a mean of 43.22 kg (+/- 11.16) force to remove the crowns from the teeth, whereas the counterrotational group required a mean of 42.87 kg (+/- 10.42) and the control group a mean of 42.12 kg (+/- 6.61). Analysis of variance on the force data indicated no differences among the 3 groups in the force needed to remove the castings (F[2,24] = 0.031, P = .97). CONCLUSION: This in vitro study demonstrated no significant differences between groups in the amount of tensile dislodgment force required to remove cemented full veneer crowns from prepared teeth after brushing for the equivalent of 2 years time with a sonic toothbrush or a counterrotational toothbrush.

Analysis of Variance↗

Longitudinal study to assess the effectivity of electric and manual toothbrushes for children.

BACKGROUND: Prophylaxis efforts for the maintenance of tooth health led to a distinctive decrease in caries frequency with children and young persons. Because the toothbrush can still be described as the most important oral hygiene aid, possible differences between the effectivity of electric and manual toothbrushes should be tested in the present study. Elementary school children had been instructed--within a special prophylaxis program--over a period of three years to clean their teeth partly with electric partly with manual toothbrushes. MATERIAL AND METHODS: In two parallel classes (1st class) of the same elementary school (Private Martinusschule Mainz-Gonsenheim) the A-class (n = 24 children) was instructed to clean their teeth with a manual toothbrush suitable for children (Oral-B, Power Tip, Braun AG, Kronberg, Germany) whereas the B-class (n = 26) received electric toothbrushes (Oral-B-7 EB 5 K, Braun AG, Kronberg, Germany). Every three months the children were instructed in group-preventive methods in school, followed by cleaning instructions, remotivations and the distribution of new electric respectively manual toothbrushes. In order to record the influence of the intensive quarterly oral hygiene instruction, elementary school children (1st class) of the same school type were looked after and examined within the yearly group prophylaxis (n = 40). The yearly dental examinations included the recording of carious frequency (DMF-T, dmf-t), approximal plaque accumulation (API), and the evaluation of the gingival state (GI-Index) as well as the present dental restorative materials. RESULTS: After an investigation period of three years no essential differences regarding caries frequency, proportion of dentitions of natural state of health and plaque involvement were found with the children of the respective classes. Children using electric toothbrushes showed after 3 years 27% of healthy-natured dentitions on average (46% of the children had got API-values of up to 30%) and the children who used manual toothbrushes showed 22% of nature-healthy dentitions (52% of the children had got API-values of up to 30%) and in 33% of the control children who received instructions only once a year healthy-natured dentitions were found after 3 years (75% of the children had got API-values of up to 35%). CONCLUSIONS: With regard to caries and gingivitis prevalence modern electric toothbrushes for children can be considered equally efficient like conventional manual toothbrushes for children with children of normal caries risk.

Child↗

An advanced toothbrush with improved plaque removal efficacy.

PURPOSE: To compare the plaque removal efficacy and safety of a new advanced manual toothbrush, the Oral-B CrossAction, with seven other toothbrushes. MATERIALS AND METHODS: Seven independent, cross-over design clinical studies were conducted using the same examiner who was blind to the identity of the test products and treatment assignments. In each study, approximately 75 healthy adult subjects from a general population brushed with their randomly assigned toothbrush (CrossAction or comparison brush) at Visit 1 for 1 min without supervision or instruction in brushing technique. Subjects returned after a 1-week washout period and brushed with the alternate toothbrush (Visit 2). Plaque was evaluated before and after brushing using the Rustogi Modified Navy Plaque Index. Statistical analyses were conducted by an independent statistician who remained blind to the identity of all test products. RESULTS: Each of the toothbrushes tested provided significant (P < or = 0.0001) reductions in plaque scores after a single brushing. In each of the studies, the CrossAction toothbrush removed significantly (P < or = 0.0001) greater amounts of whole mouth, gingival margin, and approximal plaque than the compared toothbrush. All toothbrushes were found to be safe, with no changes in oral tissues or restorations observed over the course of each study. The results from these studies were consistent, demonstrating that the CrossAction toothbrush significantly enhances the ability of subjects to remove more plaque during normal brushing compared to seven other toothbrushes.

Adult↗

The effectiveness of an ionic toothbrush in the removal of dental plaque and reduction on gingivitis in orthodontic patients.

This investigation was undertaken to determine if an ionic toothbrush was effective at removing plaque and reducing gingivitis in patients wearing orthodontic appliances. Fifty-two orthodontic patients were randomly assigned to one of two groups and completed a six-week double-blind study. Group 1 consisted of the test group using the ionic toothbrush with an active battery; group 2 consisted of the control group using the ionic toothbrush with an inactive battery. The plaque and gingival indices were measured at baseline, two weeks, and six weeks. The findings demonstrated that the active ionic toothbrush was no more effective at plaque removal and gingivitis reduction than the inactive toothbrush. Although the active toothbrush did effectively remove plaque and reduce gingivitis over the course of six weeks, it showed no significant improvement over the same toothbrush that contained an inactive battery. It was observed that the ionic toothbrush effectively reduced plaque and gingivitis regardless of the presence or absence of an active battery. The clinical findings demonstrated that an active ionic toothbrush was no more effective in removing plaque and reducing gingivitis in patients with orthodontic appliances than an inactive ionic toothbrush.

Adolescent↗

Dental plaque removal with two battery-powered toothbrushes.

PURPOSE: To compare the plaque removal efficacy of a positive control power toothbrush (Colgate Actibrush) to an experimental power toothbrush (Crest SpinBrush) following a single use. MATERIALS AND METHODS: This study was a randomized, controlled, examiner-blind, 4-period crossover design which examined plaque removal with the two toothbrushes following a single use in 39 completed subjects. Plaque was scored before and after brushing using the Turesky Modification of the Quigley-Hein Index. RESULTS: Baseline plaque scores averaged 2.18 and 2.16 for the experimental toothbrush and control toothbrush treatment groups, respectively. With respect to all surfaces examined, the experimental toothbrush delivered an adjusted (via analysis of covariance) mean difference between baseline and post-brushing plaque scores of 0.66 while the control toothbrush delivered an adjusted mean difference of 0.43. This represents an increase of 55% plaque removal relative to the control power toothbrush. The difference between brushes was statistically significant (P < 0.001). With respect to buccal and lingual surfaces, the experimental toothbrush delivered very consistent results relative to the control toothbrush. The differences between brushes were also statistically significant (P < 0.001).

Adolescent↗