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Orthodontic intervention in the early mixed dentition: a prospective, controlled study on the effects of the eruption guidance appliance.
Am J Orthod Dentofacial Orthop. 2008 Feb; 133(2):254-60; quiz 328.e2.AJ

Abstract

INTRODUCTION

A prospective, controlled cohort study was started in 1998 to investigate the effects of orthodontic treatment in the early mixed dentition with the eruption guidance appliance.

METHODS

Occlusal changes were recorded in 167 treated children and 104 controls after they had reached the middle mixed-dentition stage. Treatment began when the first deciduous incisor was exfoliated (T1) and ended when all permanent incisors and first molars were fully erupted (T2). The children's mean ages were 5.1 years (SD 0.5) at T1 and 8.4 years (SD 0.5) at T2.

RESULTS

From T1 to T2, overjet in the treatment group decreased from 3.1 to 1.9 mm and overbite from 3.2 to 2.1 mm. In the control group, overjet increased from 2.9 to 4.1 mm and overbite from 3.3 to 4.1 mm. At T2, the differences between the groups were highly significant (P <.001). At T1, 18% of the children in the treatment group and 22% of the controls had tooth-to-tooth contact between the maxillary and mandibular incisors. All others had an open bite, or the mandibular incisors were in contact with the palatal gingiva. At T2, tooth-to-tooth contact was observed in 99% of the treated children and 24% of the controls (P <.001). Almost half of children in both groups showed incisor crowding at T1. Good alignment of the incisors was observed in 98% of the treated children at T2, whereas maxillary crowding was found in 32% and mandibular crowding in 47% of the controls (P <.001). At T1, 41% of the children in the treatment group and 53% of the controls had a Class I relationship; the rest had either a unilateral or a bilateral Class II relationship. At T2, a Class I relationship was found in 90% of the treated children and 48% of the controls (P <.001). At least 1 occlusal deviation, including overjet > or =5 mm, overbite > or =5 mm, open bite, gingival contact of the mandibular incisors, crowding, or Class II relationship, was observed in 13% of the treated children, but the deviations were mild, and no child was considered to need treatment. In the control group, 88% of the children showed at least 1 occlusal deviation (P <.001).

CONCLUSIONS

Treatment in the early mixed dentition with the eruption guidance appliance is an effective method to restore normal occlusion and eliminate the need for further orthodontic treatment. Only a few spontaneous corrective changes can be expected without active intervention.

Authors+Show Affiliations

Vaasa Central Hospital, Vaasa, Finland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18249292

Citation

Keski-Nisula, Katri, et al. "Orthodontic Intervention in the Early Mixed Dentition: a Prospective, Controlled Study On the Effects of the Eruption Guidance Appliance." 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. 133, no. 2, 2008, pp. 254-60; quiz 328.e2.
Keski-Nisula K, Hernesniemi R, Heiskanen M, et al. Orthodontic intervention in the early mixed dentition: a prospective, controlled study on the effects of the eruption guidance appliance. Am J Orthod Dentofacial Orthop. 2008;133(2):254-60; quiz 328.e2.
Keski-Nisula, K., Hernesniemi, R., Heiskanen, M., Keski-Nisula, L., & Varrela, J. (2008). Orthodontic intervention in the early mixed dentition: a prospective, controlled study on the effects of the eruption guidance appliance. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 133(2), 254-60; quiz e2. https://doi.org/10.1016/j.ajodo.2006.05.039
Keski-Nisula K, et al. Orthodontic Intervention in the Early Mixed Dentition: a Prospective, Controlled Study On the Effects of the Eruption Guidance Appliance. Am J Orthod Dentofacial Orthop. 2008;133(2):254-60; quiz 328.e2. PubMed PMID: 18249292.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Orthodontic intervention in the early mixed dentition: a prospective, controlled study on the effects of the eruption guidance appliance. AU - Keski-Nisula,Katri, AU - Hernesniemi,Riitta, AU - Heiskanen,Maritta, AU - Keski-Nisula,Leo, AU - Varrela,Juha, PY - 2006/02/14/received PY - 2006/05/03/revised PY - 2006/05/22/accepted PY - 2008/2/6/pubmed PY - 2008/2/20/medline PY - 2008/2/6/entrez SP - 254-60; quiz 328.e2 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 - 133 IS - 2 N2 - INTRODUCTION: A prospective, controlled cohort study was started in 1998 to investigate the effects of orthodontic treatment in the early mixed dentition with the eruption guidance appliance. METHODS: Occlusal changes were recorded in 167 treated children and 104 controls after they had reached the middle mixed-dentition stage. Treatment began when the first deciduous incisor was exfoliated (T1) and ended when all permanent incisors and first molars were fully erupted (T2). The children's mean ages were 5.1 years (SD 0.5) at T1 and 8.4 years (SD 0.5) at T2. RESULTS: From T1 to T2, overjet in the treatment group decreased from 3.1 to 1.9 mm and overbite from 3.2 to 2.1 mm. In the control group, overjet increased from 2.9 to 4.1 mm and overbite from 3.3 to 4.1 mm. At T2, the differences between the groups were highly significant (P <.001). At T1, 18% of the children in the treatment group and 22% of the controls had tooth-to-tooth contact between the maxillary and mandibular incisors. All others had an open bite, or the mandibular incisors were in contact with the palatal gingiva. At T2, tooth-to-tooth contact was observed in 99% of the treated children and 24% of the controls (P <.001). Almost half of children in both groups showed incisor crowding at T1. Good alignment of the incisors was observed in 98% of the treated children at T2, whereas maxillary crowding was found in 32% and mandibular crowding in 47% of the controls (P <.001). At T1, 41% of the children in the treatment group and 53% of the controls had a Class I relationship; the rest had either a unilateral or a bilateral Class II relationship. At T2, a Class I relationship was found in 90% of the treated children and 48% of the controls (P <.001). At least 1 occlusal deviation, including overjet > or =5 mm, overbite > or =5 mm, open bite, gingival contact of the mandibular incisors, crowding, or Class II relationship, was observed in 13% of the treated children, but the deviations were mild, and no child was considered to need treatment. In the control group, 88% of the children showed at least 1 occlusal deviation (P <.001). CONCLUSIONS: Treatment in the early mixed dentition with the eruption guidance appliance is an effective method to restore normal occlusion and eliminate the need for further orthodontic treatment. Only a few spontaneous corrective changes can be expected without active intervention. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/18249292/Orthodontic_intervention_in_the_early_mixed_dentition:_a_prospective_controlled_study_on_the_effects_of_the_eruption_guidance_appliance_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(07)01023-2 DB - PRIME DP - Unbound Medicine ER -