Somatosensory-evoked potential to evaluate the trigeminal nerve after sagittal split osteotomy

Nakagawa, Kiyomasa; Ueki, Koichiro; Takatsuka, Shigeyuki; Takazakura, Daisuke; Yamamoto, Etsuhide

doi:10.1067/moe.2001.112331

Cited by 48 publications

(25 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…21 The TSEP method is non-invasive, highly objective, and extremely reliable for investigating trigeminal sensory hypoesthesia of the lower lip after mandibular ramus osteotomy. [10][11][12] Simple sensory tests, such as 2-point sensory discrimination, allow for patient bias despite objective parameters such as stimulating pressure. However, TSEP data is directly collected from electroencephalography of the cerebral cortex, and is therefore more objective and reliable.…”

Section: Discussionmentioning

confidence: 99%

“…The methodology and values of TSEP have been described previously in our preliminary studies. [10][11][12] The electrodes were placed exactly under the highest point of the vermilion border and on the mucosa of the lower lip. An electroencephalograph recording system (Neuropack Sigma™; Nihon Koden Corp., Tokyo, Japan) was used to measure the potentials.…”

Section: Measurement Of Lower Lip Hypoaesthesia With Trigeminal Sensomentioning

confidence: 99%

“…The distal tip of the proximal segment, which is the most susceptible bone, may become necrotic. 11 Moreover, a rare Eagle-like syndrome may occur. 17 Flattening of the face and asymmetry can also occur on the side of the medially displaced proximal segment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effects of changing position and angle of the proximal segment after intraoral vertical ramus osteotomy

Ueki

Hashiba

Marukawa

et al. 2009

International Journal of Oral and Maxillofacial Surgery

View full text Add to dashboard Cite

Abstract. We evaluated changes in position and angle of the proximal segment, including the condyle, after intraoral vertical ramus osteotomy (IVRO) with and without a Le Fort I osteotomy to verify whether displacement of the proximal segment could induce postoperative complications.Of 29 Japanese patients with mandibular prognathism with asymmetry, 16 underwent IVRO and 13 underwent IVRO in combination with a Le Fort I osteotomy. The changes in condylar angle, ramus angle, and displacement of the proximal segment were measured pre and post-operatively using computed tomography (CT). The position of the temporomandibular joint (TMJ) disc was examined with magnetic resonance imaging (MRI) pre and postoperatively. Trigeminal nerve hypoesthesia in the lower lip was assessed bilaterally by the trigeminal somatosensory evoked potential (TSEP).The postoperative horizontal condylar angle was significantly smaller than the preoperative one on both the deviated and non-deviated sides (P<0.0001). The postoperative coronal condylar angle was significantly larger than the preoperative one on the deviated side (P=0.0483). The postoperative sagittal ramus angle was larger than the preoperative one on both the deviated (P<0.0001) and non-deviated side (P=0.00005). Most (6 of 8 joints) with an anteriorly-displaced disc with (ADDwR) and without reduction (ADDwoR) improved on the non-deviated side, and 5 joints of 16 improved on the deviated side.Results suggest that the position and the angle of the proximal segment, including the condyle, could change after IVRO. Although this could be associated with symptomatic improvement in TMJ, extreme medial displacement of the proximal segment could delay recovery from lower lip hypoesthesia.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Measurement Of Lower Lip Hypoaesthesia With Trigeminal Sensomentioning

confidence: 99%

See 1 more Smart Citation

The effects of changing position and angle of the proximal segment after intraoral vertical ramus osteotomy

Ueki

Hashiba

Marukawa

et al. 2009

International Journal of Oral and Maxillofacial Surgery

View full text Add to dashboard Cite

show abstract

“…18 Algumas razões possíveis para esta complicação são o edema ou hematoma pós-operatório, manipulação de instrumentos cirúrgicos, manipulação do próprio nervo, 19 disseção do periósteo medial, 18,20 e compressão pelo buraco mandibular após recuo do segmento distal. 20 Existe uma associação com a idade 21 e densidade óssea, 22 bem como uma dependência da técnica cirúrgica e da anatomia do canal mandibular, 23,24 cuja distância ao córtex bucal parece ser menor nas mandíbulas prognáticas do que nas retrognáticas.…”

Section: Lesão Do Nervo Alveolar Inferiorunclassified

Osteossíntese no Tratamento Cirúrgico dos Prognatismos: Estado da Arte

Durão

Amarante

2017

Acta Med Port

View full text Add to dashboard Cite

“…threshold of light touch perception, two-point discrimination threshold, temperature sensitivity, and trigeminal somatosensory-evoked potentials (TSEP) (de Beukelaer et al, 1998;Jones & Wolford, 1990;Nakagawa et al, 1997;Nakagawa et al, 2001;Nakagawa et al, 2003). The TSEP method is non-invasive, highly objective and extremely reliable and can be used to investigate trigeminal sensory hypoesthesia of the lower lip after mandibular ramus osteotomy.…”

Section: Introductionmentioning

confidence: 99%

Effect of self-setting α-tricalcium phosphate between segments for bone healing and hypoaesthesia in lower lip after sagittal split ramus osteotomy

Ueki¹,

Okabe²,

Marukawa³

et al. 2012

Journal of Cranio-Maxillofacial Surgery

Self Cite

View full text Add to dashboard Cite

Purpose. The purpose of this study was to evaluate hypoesthesia of lower lip and bone formation using self-setting α-tricalcium phosphate (Biopex®) between the proximal and distal segments following sagittal split ramus osteotomy (SSRO) with bent absorbable plate fixation.Subjects and Methods. The subjects were 40 patients (80 sides) who underwent bilateral SSRO setback surgery. They were divided into a Biopex® group (40 sides) and a control group (40 sides). The Biopex® was inserted into the anterior part of the gap between the segments in the Biopex® group. Trigeminal nerve hypoesthesia at the region of the lower lip was assessed bilaterally by the trigeminal somatosensory-evoked potential (TSEP) method. Ramus square, ramus length, and ramus width, the square of the Biopex® at the horizontal plane under the mandibular foramen were assessed preoperatively, immediately after surgery, and 1 year postoperatively by computed tomography (CT).Results. The mean measurable period and standard deviation were 9.3±15.7 weeks in the control group, 5.3±8.3 weeks in the Biopex® group, and there was no significant difference.Ramus square after 1 year was significantly larger than that prior to surgery and new bone formation was found between the segments in both groups (P<0.05). In the Biopex® group, the square of the Biopex® after 1 year was significantly smaller than that immediately after surgery (P<0.05).Conclusion. This study suggested that inserting Biopex® in the gap between the proximal and distal segments was useful for new bone formation and it did not prevent the recovery of lower lip hypoesthesia after SSRO with bent absorbable plate fixation.

show abstract

Somatosensory-evoked potential to evaluate the trigeminal nerve after sagittal split osteotomy

Cited by 48 publications

References 22 publications

The effects of changing position and angle of the proximal segment after intraoral vertical ramus osteotomy

The effects of changing position and angle of the proximal segment after intraoral vertical ramus osteotomy

Osteossíntese no Tratamento Cirúrgico dos Prognatismos: Estado da Arte

Effect of self-setting α-tricalcium phosphate between segments for bone healing and hypoaesthesia in lower lip after sagittal split ramus osteotomy

Contact Info

Product

Resources

About