Motivational Interview and Orthodontic Patients
The Effect of Motivational Interviewing on Oral Hygiene Behavior in Patients With Fixed Orthodontic Appliances: A Randomised Clinical Trial
A parallel-group randomized clinical trial was conducted with 45 patients of the Orthodontic Clinic of Universidad Iberoamericana's (UNIBE) Postgraduate Unit. The study hypothesis was that motivational interview plus oral hygiene instructions would be more effective in maintaining long-term oral hygiene in comparison with conventional oral hygiene instructions alone.
A computer-generated list of numbers created with Statistical Package for the Social Sciences (SPSS) V21.0 was used to random allocate participants into the experimental or the control group. Monthly oral hygiene instructions and a G.U.M. kit were given to the sample. Additionally, the experimental group received motivational interviewing sessions by a trained periodontist. Simplified Oral Hygiene Index, Gingival Index, Periodontal Probing Depth and Bleeding on Probing were recorded at baseline, three and six months after the beginning of the study. Repeated-measures analysis of variance and chi-squared test were conducted.
調査の概要
詳細な説明
Sample calculation A power analysis was carried out to determine the number of subjects needed to achieve a Simplified Oral Hygiene Index (SOHI) significant interaction with the study groups when applying repeated measures ANOVA. The total number of completed subjects needed to achieve power of 0.90 with an alpha (α) of 0.05, an effect size (f) of at least .25 was determined to be 36; taking into consideration a possible 10% attrition rate, 45 subjects were recruited, consented and randomized to either the experimental or control group.
Due to the matter that repeated measures ANOVA treats each measurement as a separate variable, and it's preferable to use listwise deletion, if one measurement is missing, the whole case gets dropped. For this reason and therefore the incontrovertible fact that the trial suffers attrition, the sample for the three measurements was reduced to 32 subjects.
Randomization A simple randomization procedure was executed by the principal investigator to allocate the participants into one of the study groups. A computer-generated list of numbers was created using the software SPSS V21.0, with a 1:1.25 allocation ratio.
Two dentists enrolled and allocated the participants according to the order of arrival and following the list of random numbers. A coding system was used as a concealment mechanism, which consisted of colored labels attached to the participants' file. Thus, the participant and the evaluator (the periodontist who recorded the data) were masked.
Study intervention An interviewer was in charge of providing oral hygiene instructions for both groups. All the participants received a G.U.M. kit with special orthodontic hygiene tools. Then, the patients of the experimental group received a motivational interviewing session.
Afterward, the clinical parameters were measured by another periodontist. Monthly follow-up appointments were scheduled for the orthodontic check-ups to deliver a new G.U.M. kit, to reinforce the OHI and MI, and to register the periodontal parameters. The important data for this research was the one recorded at baseline, three and six months after the intervention.
Statistical analysis Mean Simplify oral hygiene index (SOHI), gingival index (GI), periodontal probing depth (PPD), and bleeding on probing (BoP) scores were compared between groups across three-time points using repeated-measures mixed-model analysis of variance. Tests for equality of variances and sphericity to check for homoscedasticity were performed due to the problem of sample attrition. Nevertheless, it was not found any violation to these assumptions in any of the variables included in the analysis. SPSS software was used for all calculations (IBM SPSS 25th version). Due to the nominal level of measurement of the variable BoP, it was performed a chi-squared test for each three time points to check if there were any differences between the two experimental conditions.
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Distrito Nacional
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Santo Domingo、Distrito Nacional、ドミニカ共和国、22333
- Universidad Iberoamericana UNIBE
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Patients with 18-40 years old, systemically healthy, without active dental caries lesions or periodontal diseases, who were candidates for fixed orthodontic appliances.
Exclusion Criteria:
- Smokers and pregnant patients.
- Participants were discarded if they decided voluntarily to abandon the study of the orthodontic treatment or if they didn't attend to the periodical check-ups.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:防止
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
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実験的:Experimental group
A trained periodontist delivered oral hygiene instructions and motivational interviewing sessions.
All the participants received a G.U.M. kit with special orthodontic hygiene tools.
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A periodontist was trained and evaluated by two expert psychologists in MI, who also supervised the interviewer to ensure that the intervention was properly applied.
The periodontist conducted sessions of motivational interviewing monthly to the participants of the experimental group.
他の名前:
A periodontist delivered OHI to all the participants of both studied groups.
Also, every single patient received a G.U.M. kit with special orthodontic hygiene tools.
他の名前:
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アクティブコンパレータ:Control group
A trained periodontist delivered only oral hygiene instructions.
All the participants received a G.U.M. kit with special orthodontic hygiene tools.
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A periodontist delivered OHI to all the participants of both studied groups.
Also, every single patient received a G.U.M. kit with special orthodontic hygiene tools.
他の名前:
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Simplified Oral Hygiene Index
時間枠:Base line.
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six surfaces (from fou r posterior and two anterior teeth ) are examined for debris and calculus, whereas 12 surfaces are examined.
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Base line.
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Simplified Oral Hygiene Index
時間枠:3rd month
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six surfaces (from fou r posterior and two anterior teeth ) are examined for debris and calculus, whereas 12 surfaces are examined.
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3rd month
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Simplified Oral Hygiene Index
時間枠:6th month
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six surfaces (from fou r posterior and two anterior teeth ) are examined for debris and calculus, whereas 12 surfaces are examined.
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6th month
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Gingival Index
時間枠:Base line, 3 and 6 months after the intervention.
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Each of the four gingival areas of the tooth is given a score from 0 to 3; this is the gingival índex for the area.
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Base line, 3 and 6 months after the intervention.
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Periodontal Probing Depth
時間枠:Base line, 3 and 6 months after the intervention.
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One tooth per sextant was chosen and the average was calculated.
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Base line, 3 and 6 months after the intervention.
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Bleeding on Probing
時間枠:Base line, 3 and 6 months after the intervention.
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Dichotomic response after probing the gingival sulcus.
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Base line, 3 and 6 months after the intervention.
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協力者と研究者
捜査官
- 主任研究者:Henry A Adames, MsC、Universidad Iberoamericana
出版物と役立つリンク
一般刊行物
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研究記録日
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