Comparison of Mandibular Rami Width in Patients With Prognathism and Retrognathia

Computed tomography morphology of the mandibular ramus at the lingual plane in patients with mandibular hyperplasia

“…A higher incidence of neurosensory disturbance was found when correcting prognathism than retrognathism. RIBEIRO et al 5 agreed with HALLIKAINEN et al 2 in this aspect, only their study produced a lower value (7.8 mm in prognathism and 8.8 mm in retrognathism). MUTO et al 4 reported a mean width of 7.4 mm in prognathic patients compared with 8.7 mm in normal dentofacial controls.…”

“…3). These two numbers were higher than in the studies by MUTO et al 4 and RIBEIRO et al 5 probably because the authors chose a higher scan plane where the mandibular canal started to shape. Mandible thickness increases from notch to mandibular body, therefore the present results had a higher value.…”

“…Discussion RIBEIRO et al 5 declared that it was important to have a similarity between the sampled age and the age that patients commonly undergo surgical correction of dentofacial deformities. MUTO et al 4 studied 33 patients aged 17-39 years (mean 23 years), and TSUJI et al 6 studied 35 patients aged 15-34 years (mean 23 years).…”

“…Complications including unfavorable fracture and neurosensory disturbance have been encountered after SSRO. Some researchers investigated the potential causes of these complications, and the mediolateral width of the ramus was identified as one of the important considerations during the surgery 3,5 . The purpose of this study was to assess the mediolateral width of the mandibular ramus at the lingual plane in patients with mandibuar hyperplasia using spiral computed tomography (CT), and to compare this value with that of patients in the control group.…”

Evaluación de la Anatomía Mandibular Relacionada con la Osteotomía Sagital de la Rama

“…Se han reportado múlti-ples complicaciones asociadas a la SSRO (O'Ryan, 1990;Precius et al, 1998;Turvey, 1985), principalmente la lesión del nervio alveolar inferior (NAI) y trastornos neurosensoriales en la región mentoniana (frecuencia de 2%-15%) (Yu & Wong). Otras corresponden a la fractura de los segmentos óseos distal o proximal antes o después de la cirugía (O'Ryan; Precius et al; Turvey;Van Sockles et al, 1985;Plooij et al), especialmente cuando se realiza la osteotomía horizontal medial durante la SSRO, junto a lesión de estructuras vasculares y fracturas no favorables en casos de corticales delgadas y ángulos amplios (Kim et al, 1997), sobre todo cuando la osteotomía horizontal medial se realiza en o por encima de un punto de fusión entre las corticales lateral y medial de la rama mandibular (Guernsey & DeChamplain, 1971;Muto et al, 2003;Kim et al;Ribeiro et al, 2006).…”