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Perioral forces and dental changes resulting from mandibular lip bumper treatment.
Am J Orthod Dentofacial Orthop 1998; 113(3):247-55AJ

Abstract

This prospective study compares pretreatment and posttreatment forces produced by a lip bumper on the mandibular first molars and determines the dental effects of this appliance after 1 year of treatment. Twenty-five patients, ages 10 to 17 years, received fixed 0.045-inch passive stainless steel lip bumpers positioned at the level of the gingival margin, 2 mm from the labial surface of the teeth as the only form of treatment in the mandibular arch. At the end of 1 year, cephalometric radiographs and dental casts were taken, and lower lip forces remeasured during rest, speech, and swallowing. Lip force measurements were performed using specially designed strain gauges mounted bilaterally in the lip bumper tubes. Measurements of lip forces made before and after treatment were compared to explore the changes, if any, due to muscle adaptation to the appliance. Dental changes were measured from casts and cephalometric radiographs. Correlation analyses were performed to determine whether a relationship existed between initial force levels and resulting tooth movement. Pretreatment and posttreatment forces did not demonstrate a statistically significant difference. On the other hand, measurement of the dental casts revealed a significant increase in arch length caused by incisor proclination and protrusion, combined with molar distalization. The arch width significantly increased at the canines, first and second premolars, and first molars. The amount of force exerted by the lower lip on the molars was not correlated to the degree of tooth movement recorded in this sample.

Authors+Show Affiliations

Department of Orthodontics, University of Oklahoma, Oklahoma City 73190, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

9517714

Citation

O'Donnell, S, et al. "Perioral Forces and Dental Changes Resulting From Mandibular Lip Bumper Treatment." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 113, no. 3, 1998, pp. 247-55.
O'Donnell S, Nanda RS, Ghosh J. Perioral forces and dental changes resulting from mandibular lip bumper treatment. Am J Orthod Dentofacial Orthop. 1998;113(3):247-55.
O'Donnell, S., Nanda, R. S., & Ghosh, J. (1998). Perioral forces and dental changes resulting from mandibular lip bumper treatment. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 113(3), pp. 247-55.
O'Donnell S, Nanda RS, Ghosh J. Perioral Forces and Dental Changes Resulting From Mandibular Lip Bumper Treatment. Am J Orthod Dentofacial Orthop. 1998;113(3):247-55. PubMed PMID: 9517714.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Perioral forces and dental changes resulting from mandibular lip bumper treatment. AU - O'Donnell,S, AU - Nanda,R S, AU - Ghosh,J, PY - 1998/3/28/pubmed PY - 1998/3/28/medline PY - 1998/3/28/entrez SP - 247 EP - 55 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 113 IS - 3 N2 - This prospective study compares pretreatment and posttreatment forces produced by a lip bumper on the mandibular first molars and determines the dental effects of this appliance after 1 year of treatment. Twenty-five patients, ages 10 to 17 years, received fixed 0.045-inch passive stainless steel lip bumpers positioned at the level of the gingival margin, 2 mm from the labial surface of the teeth as the only form of treatment in the mandibular arch. At the end of 1 year, cephalometric radiographs and dental casts were taken, and lower lip forces remeasured during rest, speech, and swallowing. Lip force measurements were performed using specially designed strain gauges mounted bilaterally in the lip bumper tubes. Measurements of lip forces made before and after treatment were compared to explore the changes, if any, due to muscle adaptation to the appliance. Dental changes were measured from casts and cephalometric radiographs. Correlation analyses were performed to determine whether a relationship existed between initial force levels and resulting tooth movement. Pretreatment and posttreatment forces did not demonstrate a statistically significant difference. On the other hand, measurement of the dental casts revealed a significant increase in arch length caused by incisor proclination and protrusion, combined with molar distalization. The arch width significantly increased at the canines, first and second premolars, and first molars. The amount of force exerted by the lower lip on the molars was not correlated to the degree of tooth movement recorded in this sample. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/9517714/Perioral_forces_and_dental_changes_resulting_from_mandibular_lip_bumper_treatment_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540698000602 DB - PRIME DP - Unbound Medicine ER -