Revista Mexicana de Ortodoncia

Relation between Dental Malocclusions and Masticatory Performance in Patients with Atypical Swallowing

Bertha Cecilia Benavides-Pinto — 2025-02-17

Introduction: Atypical swallowing can modify the position of the teeth, the relationship and shape of the dental arches, and chewing. Objective: To relate chewing performance to dental malocclusions and atypical swallowing in patients from a university in Bogotá, Colombia, 2017-2018. Material and methods: Cross-sectional descriptive study in 78 subjects with atypical swallowing and dental malocclusions. Masticatory performance was measured following Albert's protocol and the mtp (Median Particle Size) was calculated using a power equation similar to the Rosin-Rammler formula. Results: Masticatory performance was not significantly correlated with the types of malocclusions (p > 0.05). mtp is higher in class II (6.05) than in class III (5.52) and class I (5.0). Conclusions: No significant correlation was found between masticatory performance, type of dentition, and malocclusion in patients with atypical swallowing.

Relationship of Pharyngeal Airway Length to Skeletal Class

Alejandro Parra-Melgar — 2025-02-17

Introduction: The study of the airways in orthodontics is essential because the respiratory function interferes with the proper development of the structures that form the craniofacial complex. Obstructions of the nasal passage favor functional imbalance and can even cause the development of malocclusions. Objective: To determine the association between the anteroposterior length (APL) of the upper (UP) and lower (LP) pharynx with skeletal class (SC), and with maxillary and mandibular length. Material and Methods: The study was carried out in the Orthodontics clinic of the Universidad Autónoma "Benito Juárez" of Oaxaca. Sixty lateral head radiographs of people aged 18 to 40 years without previous orthodontic treatment were analyzed; they were divided into groups based on SC. Results: 30 people with SCI and 30 with SCII were identified. It was observed that the APL of the LP is greater in the SCI than in the SCII (11.8 ± 2.9 mm vs. 10.0 ± 2.4 mm; p=0.007), the APL of the LP correlates weakly with mandibular length (p <0.001, r = 0.44) and the APL of the LP is greater in men than in women (12.1 ± 3.0 mm vs. 10.0 ± 2.3 mm; p= 0.003). Conclusion: the APL of the LP is greater in the SCI than in the SCII and greater in men than in women; furthermore, APL correlates with mandibular length.

Orthodontic Treatment of a Class I Patient Using Self-Ligating System

Ana Sofía García-Hernández — 2025-02-17

Introduction: Teeth malocclusion is a disability with a potential impact on mental and physical health. Regarding the etiology, it is commonly caused by a distortion of normal development. Objective: To present the orthodontic management of a class I patient with a passive self-ligation system. Case presentation: 11-year-old female patient, mesofacial, straight profile, skeletal class I, molar class I, canine class not established, 6.4 mm upper crowding and 7.73 mm lower crowding, 5 mm overbite, and 2 mm overjet. Oral breather and onychophagia. Treatment was performed with passive self-ligating system brackets. In the alignment and leveling phase, Damon® Q brackets were placed in the upper and lower arch and 0.014" CuNiTi arches, class II elastics with 24 hours of use were indicated. Buildups were placed in the upper first molars. The work phase was started with a 0.016 x 0.022" SS lower arch and was finalized with 0.019 x 0.025" SS arches. Finally, appliance removal and retention placement were performed. As for results, the facial profile was maintained, crowding was eliminated, correct overjet and overbite were obtained, molar class I was obtained, and canine and anterior guidance were established. The curve of Spee was eliminated, and arches were coordinated, obtaining the patient's complete satisfaction. Conclusion: Decision-making in the treatment plan for patients with class I malocclusion must consider various characteristics, such as the patient's profile, incisor inclination, and lower facial height. In the present case, all the characteristics presented were adequate to perform a treatment without extractions which was confirmed by the results obtained.

Camouflage Treatment in Skeletal Class II Patient with Mandibular Laterognathia: Clinical Case Report

Ilse Montserrat Montaño-Cisneros — 2025-02-17

Introduction: When there is a discrepancy in the shape and size of the bone bases in class II patients, facial disharmony is generated. Treatments for correction of dentoskeletal deformities are performed orthopedically, orthodontically, ortho-surgically, or a combination of these. Objective: To establish correct overjet and overbite, eliminating curve of Spee, and maintaining molar class I. To attain canine class I and eliminate crowding. Case presentation: A patient presents skeletal Class II, Division 1 malocclusion. Molar class I, non-established canine class, mixed dentition, parabolic upper and lower arch shape, lower midline deviated 3mm to the right (Laterognathia) 1mm overjet, 0 mm overbite; 0.018" slot Roth appliance placement, upper and lower first premolar extractions, use of midline elastics. Molar class I was maintained, canine class I was established, and a better overjet and overbite ratio was established. Conclusion: The present work suggests orthodontic camouflage as an alternative treatment when the patient is unwilling to undergo orthognathic surgery.