The International journal of prosthodontics · 2026
The Effect of Molar Bite Raising on Anterior Overbite.
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Pescia Raji, Cavalheiro Veronica Morim, Antonarakis Gregory S, Kiliaridis Stavros
Аннотация
PURPOSE: To evaluate the effect of first and second molar bite raising on anterior incisal overbite using steel bearing balls of predefined dimensions.
MATERIALS AND METHODS: The study involved 23 young adults (mean age 25 years, range 22 to 34 years) and was composed of two parts-preclinical and clinical. (a) Preclinical: Initial evaluations were conducted on dental casts of the participants mounted on a semiadjustable articulator. Stainless-steel bearing balls (2-mm and 3-mm diameter, respectively) were temporarily positioned in the occlusal central groove of the mandibular first or second molars. Photographs assessed changes in anterior overbite. (b) Clinical: Subsequent evaluations used intraoral scans on the same participants, excluding those with molar restorations, before and after applying 2-mm-diameter stainless-steel bearing balls on the mandibular first molars. Overbite measurements were performed digitally. Reliability was defined through repeated measurements using intraclass correlation coefficients (ICC).
RESULTS: Preclinical measurements showed a decrease in overbite of 2.8 ± 0.5 mm with 2-mm-diameter bearing balls on the mandibular first molars and 3.6 ± 0.5 mm on the mandibular second molars. For 3-mm-diameter bearing balls, the decrease was 3.7 ± 0.5 mm on the first molars and 4.5 ± 0.5 mm on the second molars. ICC showed excellent reliability. Clinical intraoral scans revealed a mean overbite decrease of 2.7 ± 0.4 mm with 2-mm-diameter bearing balls on the mandibular first molars. No significant difference was found between clinical and preclinical results for the same participants.
CONCLUSIONS: Larger bite raisers and more posterior placement result in greater overbite reduction. The ratio of bite raising to anterior overbite decrease was 1.6 for 2-mm-diameter and 1.4 for 3-mm-diameter raisers. Considerable interindividual variability was noted.
MATERIALS AND METHODS: The study involved 23 young adults (mean age 25 years, range 22 to 34 years) and was composed of two parts-preclinical and clinical. (a) Preclinical: Initial evaluations were conducted on dental casts of the participants mounted on a semiadjustable articulator. Stainless-steel bearing balls (2-mm and 3-mm diameter, respectively) were temporarily positioned in the occlusal central groove of the mandibular first or second molars. Photographs assessed changes in anterior overbite. (b) Clinical: Subsequent evaluations used intraoral scans on the same participants, excluding those with molar restorations, before and after applying 2-mm-diameter stainless-steel bearing balls on the mandibular first molars. Overbite measurements were performed digitally. Reliability was defined through repeated measurements using intraclass correlation coefficients (ICC).
RESULTS: Preclinical measurements showed a decrease in overbite of 2.8 ± 0.5 mm with 2-mm-diameter bearing balls on the mandibular first molars and 3.6 ± 0.5 mm on the mandibular second molars. For 3-mm-diameter bearing balls, the decrease was 3.7 ± 0.5 mm on the first molars and 4.5 ± 0.5 mm on the second molars. ICC showed excellent reliability. Clinical intraoral scans revealed a mean overbite decrease of 2.7 ± 0.4 mm with 2-mm-diameter bearing balls on the mandibular first molars. No significant difference was found between clinical and preclinical results for the same participants.
CONCLUSIONS: Larger bite raisers and more posterior placement result in greater overbite reduction. The ratio of bite raising to anterior overbite decrease was 1.6 for 2-mm-diameter and 1.4 for 3-mm-diameter raisers. Considerable interindividual variability was noted.