Page 123 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

IMPROVEMENT OF QUALITY OF LIFE WITH IMPLANT-SUPPORTED MANDIBULAR OVERDENTURES AND THE EFFECT OF IMPLANT TYPE AND SURGICAL PROCEDURE ON BONE AND SOFT TISSUE STABILITY
Table 1: OHIP-14 questionnaire divided per domain Domain 1: functional limitation
1 Have you had trouble pronouncing any words because of problems with your teeth, mouth, or denture?
2 Have you felt that your sense of taste has worsened because of problems with your teeth, mouth, or denture?
Domain 2: physical pain
3 Have you had painful aching in your mouth?
4 Have you found it uncomfortable to eat any foods because of problems with your teeth, mouth, or denture?
Domain 3: psychological discomfort
5 Have you been self-conscious because of your teeth, mouth, or denture?
6 Have you felt tense because of problems with your teeth, mouth, or denture?
Domain 4: physical disability
7 Has been your diet been unsatisfactory because of problems with your teeth, mouth, or denture?
8 Have you interrupt meals because of problems with your teeth, mouth, or denture?
Domain 5: psychological disability
9 Have you found it difficult to relax because of problems with your teeth, mouth or denture?
10 Have you been a bit embarrassed because of problems with your teeth, mouth, or denture?
Domain 6: social disability
11 Have you been a bit irritable with other people because of problems with your teeth, mouth, or denture?
12 Have you had difficulty doing your usual jobs because of problems with your teeth, mouth, or denture?
Domain 7: handicap
13 Have you felt that life, in general, was less satisfying because of problems with your teeth, mouth, or denture?
14 Have you been totally unable to function because of problems with your teeth, mouth, or denture?
The sample size for both studies was calculated using SAS Power and Sample size calculator for related samples based on an effect size of 1 mm and a standard deviation of 0.60, with the level of significance set at 0.05 and β = 0.80. The effect estimation was based on findings Vervaeke et al. 2014.42
For the OHIP-14 outcome, the impact of the change was assessed by calculating the “effect size” with the following formula:
((mean-OHIP before surgery) − (mean-OHIP three months after connection))/SD before surgery
As proposed by Cohen 1977 an “effect size” of 0.2 could be interpreted as a small change, 0.6 as a moderate change and > 0.8 as a large change.
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