Condylar Hyperplasia in a Monozygotic Twin Girl: An Argument About Etiology

Goulart, Douglas Rangel; Sigua-Rodríguez, Eder Alberto; Fariña, R; Olate, Sérgio

doi:10.1097/scs.0000000000004302

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…An uncontrolled disease in the mandibular condyle under 16 years old can cause alterations in the growth and development of the mandible [19]. Genetic conditions associated with UCH as well as phenotypes play a role in this scenario [20].…”

Section: Discussionmentioning

confidence: 99%

Early Treatment of Unilateral Condylar Hyperplasia in Adolescents: Preliminary Results

Olate

Ravelo

Alister

et al. 2023

JCM

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Facial asymmetry associated with unilateral condylar hyperplasia (UCH) is a rare disease. The aim of this study was to evaluate the clinical conditions of progressive facial asymmetry in young subjects treated with high condylectomy. A retrospective study was performed including nine subjects diagnosed with UCH type 1B and progressive facial asymmetry around 12 years old with an upper canine progressing towards dental occlusion. After an analysis and a decision of treatment, orthodontics began one to two weeks prior to the condylectomy (with a mean vertical reduction of 4.83 ± 0.44 mm). Facial and dental asymmetry, dental occlusion, TMJ status and an open/closing mouth were analyzed before surgery and in the final stage of treatment, almost 3 years after surgery. Statistical analyses were performed using the Shapiro–Wilk test and a Student’s t-test considering a p value of <0.05. Comparing T1 (before surgery) and T2 (once orthodontic treatment was finalized), the operated condyle showed a similar height to that observed in stage 1 with a 0.12 mm difference in height (p = 0.8), whereas the non-operated condyle showed greater height increase with an average of 3.88 mm of vertical growth (p = 0.0001). This indicated that the non-operated condyle remained steady and that the operative condyle did not register significant growth. In terms of facial asymmetry in the preoperative stage, a chin deviation of 7.55 mm (±2.57 mm) was observed; in the final stage, there was a significant reduction in the chin deviation with an average of 1.55 mm (±1.26 mm) (p = 0.0001). Given the small number of patients in the sample, we can conclude that high condylectomy (approx. 5 mm), if performed early, especially in the mixed-dentition stage before full canine eruption, is beneficial for the early resolution of asymmetry and thus the avoidance of future orthognathic surgery. However, further follow-up until the end of facial growth is required.

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Section: Discussionmentioning

confidence: 99%

Early Treatment of Unilateral Condylar Hyperplasia in Adolescents: Preliminary Results

Olate

Ravelo

Alister

et al. 2023

JCM

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“…The origin of facial deformities responds to environmental and genetic factors, so that the time when the deviation of the septum occurs can affect the form of maxillary growth (Goulart et al, 2018); therefore, septal deviation can be produced at different stages of life and is not necessarily related to the skeletal growth model of the subject. In this regard, the average septal deviation in the non-segmented population was 13.5º (±5º) and the average volume deviation was 4.76 ± 0.8 cm3 (Orham et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Nasal Septum Deviation and Inferior Nasal Concha Bone Hypertrophy in Class III Facial Deformity

et al. 2020

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The aim of this research was to analyze the morphology of the nasal septum and inferior nasal concha bone in class III facial deformities prior to orthodontic treatment in orthognathic surgery candidates. 40 subjects were included in this research. The inclusion criteria were an Angle class III, negative overjet and SNA angle less than 80º. Patients with facial asymmetry, facial trauma or who had undergone maxillofacial or ENT procedures were excluded. CBCT images were obtained for all the patients and the nasal septum deviation, morphology of inferior nasal concha bone and ostium of the maxillary sinus were analyzed and related to the complexity of the facial deformity expressed by the ANB angle and dental relations. The measurement was standardized by ICC and the data was analyzed using a chi square test and Spearman's coefficient with a p value < 0.005 for statistical significance. Nasal septal deviation was observed in 77.5 %. The deviation angle was 13.28º (±4.68º) and the distance from the midline to the most deviated septum was 5.56 mm (±1.8 mm) with no statistical relation to the complexity of the facial deformity. The deviated nasal septum showed inferior nasal concha bone hypertrophy on the concave side of the nasal septum deviation (p=0.049). The open or closed condition of the maxillary sinus ostium was not related to any conditions in the septum or complexity of the facial deformity. Inferior nasal concha bone hypertrophy could be related to nasal septal deviation. The nasal condition in a class III facial deformity could not differ from the general population; careful in orthognathic surgery as to be assume in the Le Fort I Osteotomy and nasal approach related to nasal septum deviation and inferior nasal concha bone.

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“…Las deformidades faciales son un complejo grupo de alteraciones faciales asociadas a defectos del desarrollo del esqueleto facial. En particular, la maxila y la mandíbula son afectados por un crecimiento que puede ser deficiente por condiciones hereditarias y por condiciones ambientales (Goulart et al, 2018).…”

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Morfología Ósea Facial en Cirugía Ortognática. ¿Existe Tendencia Hacia el Avance Facial?

et al. 2021

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RESUMEN: El objetivo de esta investigación fue determinar los movimientos preferidos en maxila y mandíbula para obtener normalidad en morfología facial utilizando técnicas de superimposición en análisis 3D. Se realizó un estudio descriptivo para evaluar el desplazamiento óseo bimaxilar y del hueso hioides en sujetos clase facial tipo II y clase facial tipo III sometidos a cirugía ortognática. Para la superimposición se utilizó como puntos fijos Nasion -Silla -Porion y la sutura cigomática-maxilar. Estos puntos se superpusieron en CBCT pre quirúrgico y postquirúrgico y se evaluó el desplazamiento de la espina nasal anterior, Punto A, Punto B, mentón y del hueso hioides. Para la evaluación y comparación de las variables continuas antes y después de la cirugía ortognática se utilizó la prueba T de Student. Para la correlación entre las variables, se utilizó el Test de Spearman considerando un valor p<0,05 como diferencia significativa. 44 sujetos de entre 18 y 40 años de ambos sexos, fueron incluidos en esta investigación. En el 90 % de los sujetos se realizó un movimiento sagital de avance de la maxila. El movimiento sagital de avance mandibular se realizó en el 100 % de los sujetos con clase facial tipo II, mientras que el 100 % de los sujetos con clase facial tipo III se realizó se le retroceso mandibular. El hueso hioides presentó un avance en 26 de los 27 sujetos con clase facial tipo III. Es posible concluir que existe una tendencia al avance maxilar independiente de la deformidad facial.

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Condylar Hyperplasia in a Monozygotic Twin Girl: An Argument About Etiology

Cited by 9 publications

References 15 publications

Early Treatment of Unilateral Condylar Hyperplasia in Adolescents: Preliminary Results

Early Treatment of Unilateral Condylar Hyperplasia in Adolescents: Preliminary Results

Nasal Septum Deviation and Inferior Nasal Concha Bone Hypertrophy in Class III Facial Deformity

Morfología Ósea Facial en Cirugía Ortognática. ¿Existe Tendencia Hacia el Avance Facial?

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