| 1706 Chewing Cycle Pattern in Relation to Lateral Dental Guidance | ||
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J. SALSENCH, J. MARTINEZ-GOMIS, J. TORRENT, J. BIZAR, and M. PERAIRE, Universitat de Barcelona, Facultat d'Odontologia, L'Hospitalet de Llobregat, Spain Objective: The aim of this study was to assess the relation between the type of lateral dental guidance and the lateral guidance angle movement of the incisal point projected both in the frontal and horizontal planes, and the height of mastication cycle. Methods: 53 dentate subjects were recruited from students of the Faculty of Dentistry of the University of Barcelona. 106 subject's sides were categorized according to lateral guidance on edge-to-edge laterotrusion into three groups: anterior guidance (n=32), canine protection (n=40), and group function (n=34). Jaw movements were recorded using a three-dimensional magnetic sensing system (Sirognathograph, Siemens). A magnet was attached to the labial surface of the lower incisors. Each participant was asked to chew 1g of peanut unilaterally for 20 sec. The first 10 chews were then analysed omitting the first chewing cycle in each recording session. Overbite was measured in all patients. The results were analysed by one-way ANOVA (Duncan) at a significance level of P < 0.05. Results: Subjects with anterior guidance (10.5mm) showed the lowest (p=0.03) height of mastication cycle compared with canine protection (12.3mm) and group function (12,59). Subjects with canine protection (35º) showed the highest (p=0.001) lateral guidance angle in the frontal plane. However, no significant differences were found in the lateral guidance angle projected in the horizontal plane between the different groups. Subjects with group function (1.6mm) had the lowest (p=0.01) overbite compared with anterior guidance (3.4mm) and canine protection (4.2 mm). A linear regression showed a higher significant relation of the dental guidance with both the height of mastication cycle and the frontal lateral guidance angle than the overbite. Conclusion: Dental guidance seems to have an important effect on the height of mastication cycle and the frontal lateral guidance angle. | ||
| Seq #197 - Masticatory Performance and Oral Function 10:15 AM-11:30 AM, Friday, 12 March 2004 Hawaii Convention Center Exhibit Hall 1-2 | ||
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