Changes in Mandibular Third Molar Angulation in High-anchorage Extraction vs Non-extraction Orthodontic Treatment: A Prospective Study

Singh, Swati; Garg, Arun; Gupta, Deepak Kumar; Singla, Litesh

doi:10.5005/jp-journals-10024-2899

Cited by 3 publications

(5 citation statements)

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“…The selected cases were chosen to entail MxM3 at developmental stage 4 or above according to Demirjian’s classification to enable accurate tracing of the pre-treatment axial inclination. Extraction cases with maximum anchorage were excluded as per our belief that arch length preservation will negate the proposed positive impact of extraction treatment on MxM3 [ 28 , 29 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the effect of extraction in comparison to distalization on the maxillary third molars in class II malocclusion: a retrospective study

Aboalnaga,

Fouda

2024

Clin Oral Invest

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Objective To compare the effects of first premolar extraction versus distalization on the vertical position and mesiodistal angulation of maxillary third molars (MxM3) in adolescent class II patients. Methods The panoramic x-rays (OPGs) of 200 adolescent class II patients with developing MxM3s were screened. The chosen sample consisted of 2 groups: Group 1 (Distalization) comprising 48 MxM3s, and Group 2 (Extraction) comprising 50 MxM3s. The pre- and post-treatment OPGs were traced to detect the mesiodistal angulation changes of the second molars (MxM2) and MxM3s. Results The angulation and vertical position of the MxM3s at T0 & T1 were also evaluated using Archer’s classification. The distalization group presented a non-significant decrease in the mean angulation of MxM2 and MxM3 (-2.4o & -4.5o uprighting respectively). In the extraction group, both MxM2 and MxM3 presented a highly significant decrease in the mean angulation (-10.5o & -11o uprighting respectively). The angulation and vertical position change of MxM3 significantly improved in the extraction group when compared to the distalization group (P < .001). Conclusion Significant uprighting and occlusal positioning of the maxillary third molars occurred in the premolar extraction treatment group when compared to the distalization treatment group. The results of the current study highlight the importance of recognizing maxillary third molars during orthodontic treatment planning of Class II malocclusion cases.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the effect of extraction in comparison to distalization on the maxillary third molars in class II malocclusion: a retrospective study

Aboalnaga,

Fouda

2024

Clin Oral Invest

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“…The majority of previous findings reported that premolar extraction did not affect M3–M2. 14 , 17 , 18 , 19 , 20 , 35 , 36 Although the mandibles can keep growing until age 25, their growth rate substantially reduces in the postpubertal period, and the bone almost reaches its maximum size at approximately 18 years. 37 A longitudinal study reported that unerupted M3 generally remained in an impacted condition, and the angulation slowly increased by approximately 20° after 12 years of follow-up.…”

Section: Discussionmentioning

confidence: 99%

“… 38 Therefore, significant improvement in M3 angulation after orthodontic treatment in postpubertal individuals was not anticipated. 17 , 19 , 20 Additionally, assessing M3–M2 without connection to a stable reference plane could lead to misinterpretation because of M2 axis rotation after orthodontic treatment. However, most previous studies did not observe the angulation between the M3 or M2 axis and a reference plane.…”

Section: Discussionmentioning

confidence: 99%

“… 14 , 15 , 16 However, the results were controversial because of the variety of demographic characteristics (eg, age, sex), evaluation methods, biomechanics of the orthodontic treatment, and characteristics of the PE group. Most previous studies reported that premolar extraction did not affect M3 angulation measured by either M3–M2 angle 17 , 18 , 19 , 20 or M3–occlusal plane (M3–OP) angle. 17 , 19 Contrarily, M3–M2 angle, 21 M3–horizontal plane (M3–HP), 22 and M3 eruption space 17 , 19 , 23 were found to improve in studies with carefully selected orthodontic cases.…”

Section: Introductionmentioning

confidence: 91%

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Improvement of the Impacted Level of Lower Third Molars After Orthodontic Treatment

Phan¹,

Lam²,

Le³

et al. 2023

International Dental Journal

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“…Any dental abnormalities (hypo-/ hypodontia, 3 impaction, dental transposition, 1 , microdontia, or cysts), distalization mechanics, congenital malformations, 9 or syndromes. 11 Panoramic radiographs (T0 and T1) were assessed using a standardized technique involving tracing the tooth outlines (premolars and molars) on matte acetate paper.…”

Section: Methodsmentioning

confidence: 99%

Beyond the ARCH: Examining mandibular third molar movements in response to premolar and single incisor extractions in orthodontic practice

Ponnada,

Kantheti,

Gandikota

et al. 2024

JCO

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Mandibular third molars have been the interest of the orthodontic professionals, not only because of their Position Eruptive pattern, also because of their possible role in the development of late incisor crowding. The impaction rate of the third molars (mandible > maxilla) is high compared to any other teeth. The impaction incidence of M3s may be lower in patients with orthodontic premolar extraction due to mesial movement of the posterior teeth. In this study angular and positional changes of mandibular 3 molars will be evaluated with premolars as well as single incisor extraction.: This study includes 30 Pre-treatment and post-treatment orthopantomogram (OPG) of patients seeking orthodontic treatment with extractions of premolars, single incisor are categorized into 2 groups -Group I includes premolar extractions, Group II includes single incisor extractions.The study concluded that extracting premolars or single incisors did not result in improved mandibular M3 angulation on both left and right sides during the observation period.The insignificant change in angulation suggests that there are other factors that play a role in the process of alteration of third molar angulation

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Changes in Mandibular Third Molar Angulation in High-anchorage Extraction vs Non-extraction Orthodontic Treatment: A Prospective Study

Cited by 3 publications

References 0 publications

Evaluation of the effect of extraction in comparison to distalization on the maxillary third molars in class II malocclusion: a retrospective study

Evaluation of the effect of extraction in comparison to distalization on the maxillary third molars in class II malocclusion: a retrospective study

Improvement of the Impacted Level of Lower Third Molars After Orthodontic Treatment

Beyond the ARCH: Examining mandibular third molar movements in response to premolar and single incisor extractions in orthodontic practice

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