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A randomized clinical trial comparing anatomic, lingualized, and zero-degree posterior occlusal forms for complete
1Department of Restorative Dentistry, University Dental Hospital of Manchester, Manchester, UK. finlaysutton@another.com
Statement Of Problem:
There is a lack of evidence to recommend a particular type of posterior occlusal form for conventional complete dentures.
Purpose:
The purpose of this study was to compare subject satisfaction with 3 types of posterior occlusal forms for complete dentures in a randomized cross-over controlled trial.
Material And Methods:
For each participant (n=45), 3 sets of complete dentures were fabricated, each of which had a different posterior occlusal form (0-degree, anatomic, and lingualized). Each set was worn for 8 weeks in a randomized order. Subjective data were collected using the Oral Health Impact Profile 20-EDENT (OHIP-EDENT). The Wilcoxon statistical test was used to compare differences between the groups (alpha=.05).
Results:
Lingualized posterior occlusal forms were perceived to be significantly superior in terms of painful aching in the mouth (P=.01), sore spots (P<.001), eating ability (P=.02), and meal interruptions (P=.008), compared with 0-degree posterior occlusal forms. Subjects with anatomic posterior occlusal forms had significantly fewer problems eating (P=.05) compared with 0-degree posterior occlusal forms. There was no significant difference found between the lingualized and anatomic posterior occlusal forms.
Conclusions:
Participants provided with complete dentures having lingualized or anatomic posterior occlusal forms exhibited significantly higher levels of self-perceived satisfaction compared to those with 0-degree posterior occlusal forms.