Iatrogenic absence of maxillary canines: Bolton discrepancy treated with mandibular incisor extraction

Simão, Tassiana Mesquita; Valladares‐Neto, José; Rino-Neto, José; Paiva, João Batista de

doi:10.1016/j.ajodo.2012.04.026

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…There is very few case report in the literature showing orthodontic management of missing canines. [5,15] In canine-guided occlusion, during lateral excursion, all the teeth will have no contact except for the cuspids on the working side. Here, the horizontal forces are minimized by limiting the contact of the supporting cusps to their opposing fossae.…”

Section: Discussionmentioning

confidence: 99%

Management of tooth size discrepancy due to previously extracted maxillary canines

Mascarenhas

Parveen

2015

J Indian Orthod Soc

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Maxillary canines play an important role in creating good facial and smile esthetics since they are positioned at the corners of the dental arch. [1] Functionally, they support the dentition, contributing to disocclusion during lateral movements. [2] Maxillary permanent canine position varies frequently. It can be placed labially, palatally, or it can be impacted. [3,4] Permanent canines are not usually extracted for orthodontic treatment because their prominence serves as a base for the upper lip and their extraction may cause flattening of the face. [5] However, in certain situations, therapeutic extraction of canines is recommended. [6] (1) Impacted canines which require complex therapeutic management with questionable prognosis, (2) canine that is completely out of the arch with good contact between lateral incisor and premolar where alignment of canine into the arch results in proclination. Though canine extraction may temporarily improve esthetics, it might require complex orthodontic treatment to resolve the malocclusion. [7] The consequences of early loss of permanent canine may result in arch collapse, inability to provide a functional occlusion, tooth size/arch length discrepancy (TSALD), or Bolton's discrepancy. This case report describes the orthodontic management of previously extracted permanent maxillary canine. dIagnosIs and etIology An 18-year-old female patient reported to the author's private clinic with the chief complaint of unesthetic appearance of her teeth. Her maxillary permanent canines were missing, and she gave a history of extraction by a general dental practitioner when she was around 12-13 years. Early loss of permanent maxillary canine may contribute increased growth of mandible in both sagittal and horizontal direction. Extraoral examination revealed that the patient had a straight profile, competent lips, and normal nasolabial angle [Figure 1]. Intraoral examination showed a healthy periodontium, absence of the maxillary canines, severe crowding in the lower arch, and cross bite

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Section: Discussionmentioning

confidence: 99%

Management of tooth size discrepancy due to previously extracted maxillary canines

Mascarenhas

Parveen

2015

J Indian Orthod Soc

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Indications for lower incisor extraction â€“ A case series review

2020

IJOHD

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Lower incisor extraction is a treatment regime since decades with its own advocates and opponents. Even though many pioneers and legends support lower incisor extraction therapy, there is still a dilemma in the orthodontic community which might be due to the fear of certain disadvantages such as formation of black triangles, midline discrepancy, loss of canine guidance, decrease in intercanine width and bite deepening. But proper case selection, treatment planning and treatment mechanics will produce stable and good results with lower incisor extraction therapy. In this article we are illustrating the specific indications of lower incisor extraction with the help of treated cases.

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A comparative evaluation of pre-treatment and post-treatment outcomes in patients subjected to lower incisor extraction

Mahapatra,

Mohapatra,

Parameswaran

2024

JCO

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Mandibular incisor crowding is the most frequently occurring characteristic of malocclusion, which can be resolved by removing single lower incisor. The aim of this study was to evaluate and compare the pre- and post-treatment outcomes through model and cephalometric analysis of the patients subjected to single lower incisor extraction. In this retrospective study pre- and post-treatment lateral cephalograms and models of 23 patients who underwent fixed orthodontic treatment with single incisor extraction on lower arch were evaluated. The study subjects were classified into two groups based on extraction pattern (Group I: Upper premolar and lower single incisor extraction; Group II: Upper non extraction and lower single incisor extraction). Both cephalometric and model analysis were carried out using Ilexis FACAD AB-2014 Version3.8.0.0 (Ilexis AB, Sweden). Wilcoxon Signed Rank test was used to compare the pre and post-treatment quantitative parameters. A significant decrease was observed in the maxillary intermolar width, mandibular intercanine width, mandibular intermolar width, mandibular arch length and anterior Bolton’s ratio. Group I subjects revealed a greater decrease in maxillary intermolar width compared to Group II, whereas a greater decrease in mandibular intercanine width, mandibular intermolar width and anterior Bolton’s ratio was documented in Group II subjects compared to Group I. Cephalometric analysis revealed significant proclination and extrusion effect of lower incisors along with protrusive tendency of the lower lip. The findings of the present study provide an additional option of extracting single lower incisor, in borderline or Class II camouflage treatment cases.

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Iatrogenic absence of maxillary canines: Bolton discrepancy treated with mandibular incisor extraction

Cited by 3 publications

References 31 publications

Management of tooth size discrepancy due to previously extracted maxillary canines

Management of tooth size discrepancy due to previously extracted maxillary canines

Indications for lower incisor extraction â€“ A case series review

A comparative evaluation of pre-treatment and post-treatment outcomes in patients subjected to lower incisor extraction

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