Influence of treatment with and without extractions on the growth pattern of dolichofacial patients

Porto, Vanessa Scherer; Henriques, José Fernando Castanha; Janson, Guilherme; Freitas, Marcos Roberto de; Pinzan, Arnaldo

doi:10.1590/s2176-94512012000600016

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…[24] and Katsaros [25] found no statistically signi cant difference in the skeleton values in the vertical direction between the groups that were photographed and those that were not. Although no statistically signi cant difference was found in the FMA angle between the four premolar extraction groups and the nonextraction-treated group, Porto et al [27] reported a 1.70 decrease in the SN/GoGn angle, which was statistically signi cant. In our current study, we investigated potential alterations that the chosen anchorage method, which is supposed to hypothetically have a "wedge effect," may have on a patient's vertical values following orthodontic tooth extraction.…”

Section: Resultsmentioning

confidence: 84%

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Evaluation of Vertical Skeletal Changes in Hyperdivergent Individuals Who Underwent Four Premolar Extraction Treatments

Tunca

Kaya

Tunca

2022

Preprint

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Objective The study aimed to assess skeletal changes in the vertical plane in hyperdivergent individuals who underwent fixed orthodontic treatment that included the extraction of four premolars. Materials and Methods The study was carried out on the cephalometric radiographs of 52 individuals. The patients were classified into Group A, who underwent fixed orthodontic therapy without extraction, and Group B, who underwent fixed orthodontic extraction. Patients characterized by the following were included: skeletal class I, hyperdivergent individuals, ≤ 6 mm crowding for Group A, 6 mm for Group B individuals with crowding > 6 mm, and individuals in whom tooth extraction space is closed with a moderate or minimum anchorage. The FMA, Post. SUM, Sn/GoGn angles, and N–Me distance in radiographs were evaluated at the beginning (T1) and end of treatment (T2). Results The SN/GoGn, Post. SUM, and N-Me values were higher during T2 than during T1 in both groups (p = 0.05; p < 0.01). A comparison of the T2–T1 difference according to the groups and the measurement values, whereas no statistically significant difference was observed in the Sn/GoGn, FMA, or N–Me changes. The 0.430 increase in the Post. SUM value showed a statistically significant difference. Conclusion In hyperdivergent patients receiving orthodontic treatment involving the extraction of four premolars, minimum- and moderate-anchorage alternatives have no influence on the vertical direction. Clinical Relevance: The impacts of various anchoring techniques on individuals vertical characteristics should be considered when planning a fixed orthodontic treatment.

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Section: Resultsmentioning

confidence: 84%

“…Six studies have addressed vertical alterations in hyperdivergent people who received orthodontic tooth extraction [15,[23][24][25][26][27]. Four of these investigations involved teams of hyperdivergent people with class II skeletal abnormalities.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Vertical Skeletal Changes in Hyperdivergent Individuals Who Underwent Four Premolar Extraction Treatments

Tunca

Kaya

Tunca

2022

Preprint

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“…According to the results of the present study, it seems that the effect of four premolar extraction therapy on the vertical skeletal dimension is not apparent in preadolescent and adolescent children with skeletal hyperdivergence. On the contrary, in a similar hyperdivergent class II sample, Porto et al [18] reported a statistically significant decrease in the SN-GoGn angle and facial axis (SN-Gn angle) of less than 1°in the extraction group compared with an increase of less than 1.5°in the non-extraction group. A similar beneficial effect on the anterior facial height was also noted for the extraction group compared to the non-extraction group in both class I and II patients [5].…”

Section: Discussionmentioning

confidence: 86%

“…On the contrary, in a similar hyperdivergent class II sample, Porto et al. [ 18 ] reported a statistically significant decrease in the SN-GoGn angle and facial axis (SN-Gn angle) of less than 1° in the extraction group compared with an increase of less than 1.5° in the non-extraction group. A similar beneficial effect on the anterior facial height was also noted for the extraction group compared to the non-extraction group in both class I and II patients [ 5 ].…”

Section: Discussionmentioning

confidence: 94%

Auswirkungen der Extraktion von 4 Prämolaren auf die vertikale Dimension des Gesichts

et al. 2022

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Purpose Adequate control of the vertical dimension is of great importance in orthodontic treatment. Although existing evidence is very limited, extraction of four premolars is thought to contribute towards improved control of anterior facial height compared with non-extraction treatment protocols. Thus, the aim of this retrospective cohort study was to compare the effect of fixed-appliance treatment with extraction of four premolars to non-extraction treatment on the skeletal vertical dimension. Methods A consecutive sample of 76 children with skeletal hyperdivergence (49% male; mean age 11.9 years) was divided into two groups for treatment with either non-extraction (n = 31) or extraction of four premolars (n = 45). Baseline characteristics were comparable: overjet 5.1 ± 2.5 mm, overbite 2.4 ± 1.9 mm, ANB angle 4.6 ± 2.3°, and SN-ML angle 40.2 ± 3.5°. Patients were treated with standard edgewise fixed appliances with closing loops/sliding mechanics. Vertical skeletal and dental outcomes were measured on lateral cephalograms before and after treatment. Data were analyzed with linear regression at 5%. Results Compared to non-extraction treatment, treatment with premolar extractions had no significant effect on the SN-ML angle (difference (Δ) = 0.07°; 95% confidence interval −0.90 to 1.01°; P = 0.88). Statistically significant changes between the extraction and non-extraction groups were only found for the parameters SNA (Δ −1.47°; P = 0.003), ANB (Δ −1.17°; P = 0.004), SN-OP (Δ −1.48°; P = 0.04), and L1-ML (Δ −6.39°; P < 0.001). Conclusion Orthodontic treatment of children with skeletal hyperdivergence using systematic extraction of four premolars had minimal effects on the vertical facial dimension compared to non-extraction treatment.

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Effect of orthodontic treatment with 4 premolar extractions compared with nonextraction treatment on the vertical dimension of the face: A systematic review

Kouvelis

Dritsas

Doulis

et al. 2018

American Journal of Orthodontics and Dentofacial Orthopedics

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Influence of treatment with and without extractions on the growth pattern of dolichofacial patients

Cited by 3 publications

References 25 publications

Evaluation of Vertical Skeletal Changes in Hyperdivergent Individuals Who Underwent Four Premolar Extraction Treatments

Evaluation of Vertical Skeletal Changes in Hyperdivergent Individuals Who Underwent Four Premolar Extraction Treatments

Auswirkungen der Extraktion von 4 Prämolaren auf die vertikale Dimension des Gesichts

Effect of orthodontic treatment with 4 premolar extractions compared with nonextraction treatment on the vertical dimension of the face: A systematic review

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