Short Communication: Influence of preformed metal crowns (Hall technique) on the occlusal vertical dimension in the primary dentition
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AIM: This was to investigate the measure of propping, or occlusal interference and opening the bite after placement of preformed metal crowns (PMC) using the Hall technique and in how many days it took for the open bite to return to normal. METHODS: For this study school children living in the rain forest of Suriname were selected. The distance between the tip of the mandibular and maxillary primary canines was measured just before and after treatment with PMCs and again after 15 and 30 days. RESULTS: In 48 children the mean distance between the canine tips reduced from 2.45mm before to 0.54mm directly after treatment. After 15 days the distance increased again to 1.96mm and after 30 days (with the remaining 8 patients) to 2.75mm. The reduction of the overbite seems to be caused by intrusion of the crowned molar and its antagonist. CONCLUSION: Although the overbite had equilibrated after 30 days, additional research is necessary in a larger study to draw more decisive conclusions.
Keywordspreformed metal crowns primary teeth occlusion
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- Innes NP, Evans DJ, Stirrups DR. The Hall Technique; a randomized controlled clinical trial of a novel method of managing carious primary molars in general dental practice: acceptability of the technique and outcomes at 23 months, BMC Oral Health. 2007 Dec 20; 7: 18.Google Scholar
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