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Oral and Maxillofacial Surgery

Published in:

12-09-2021 | Original Article

The neurosensory deficit of inferior alveolar nerve following bilateral sagittal split osteotomy: a prospective study

Authors: Abdullah Hanfesh, Ra’ed Ghaleb Salma, Khaild Al Mutairi, Sadeen K. AlShiha, Sami Al Otaibi

Published in: Oral and Maxillofacial Surgery | Issue 3/2022

Abstract

Objectives

Investigation in Saudi Arabia or the Arab Gulf States to assess the unfavorable impacts of the bilateral sagittal split osteotomy (BSSO) is non-existent, so questions have been raised about the success rate of this operation and the frequency of unwilling outcome. To address these worries, we directed a case series study to evaluate the hypoesthesia, a type of neurosensory deficit (NSD) of the inferior alveolar nerve (IAN) after BSSO, and if the hypoesthesia outcome will improve if the surgeries performed by a single surgeon.

Patients and methods

This was a prospective case series study for the patient who underwent BSSO in a medical complex that is considered one of the largest in Saudi Arabia (Riyadh). The inclusion criteria include patient aged 18–40 years, any gender, and American Society of Anesthesiologists (ASA) class I. They will undergo BSSO for either mandibular, retrognathia, prognathic, or to follow the maxilla. The outcome will be measured after evaluating the neurosensory by four means light touch (LT), pinprick (PP), 2-point discrimination (2PD), and thermal sensations (TT) in four repeated measurements (preoperatively, 1 week, 1 month, 3 months postoperatively) as the primary outcome. Other confounding factors were the secondary outcome (age, gender, visualization of the I.A.N, the type of mandibular movement, split favorability, mandibular canal location, and patient reports about paresthesia or dysesthesia on any given side); these data analyses were carried out using SPSS ver. 25 data processing software.

Results

The nerve was visible in 93% of cases. During the operation, none of the nerves was transected. Hypoesthesia on the first follow-up was 94% of cases for LT, 92% for PP, 82% for TT, and 100% for the 2PD. On the last follow-up, the patients still had hypoesthesia for the LT 51%, PP 35%, TT41%, and 2PD 55%; age and sex did not significantly affect hypoesthesia outcomes. Nerve visibility and inferior alveolar nerve canal (IAC) distance did not influence the results. The level of confidence for all tests was set at p < 0.05.

Conclusions

The 2PD sensation was the most affected sense on the last visit, and the right side of the chin and lower lip was affected most both on early and long-term follow-up due to several reasons. A 3-month period was enough as a recovery time to restore 100% of neurological sensation for 45% of the sample, which is similar to several studies in the literature. A single surgeon did not show superior result compared to two surgeons’ literature papers. Advancement movement was associated with a high percentage of hypoesthesia.

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Title: The neurosensory deficit of inferior alveolar nerve following bilateral sagittal split osteotomy: a prospective study
Authors: Abdullah Hanfesh
Ra’ed Ghaleb Salma
Khaild Al Mutairi
Sadeen K. AlShiha
Sami Al Otaibi
Publication date: 12-09-2021
Publisher: Springer Berlin Heidelberg
Published in: Oral and Maxillofacial Surgery / Issue 3/2022
Print ISSN: 1865-1550
Electronic ISSN: 1865-1569
DOI: https://doi.org/10.1007/s10006-021-01005-2

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

The neurosensory deficit of inferior alveolar nerve following bilateral sagittal split osteotomy: a prospective study

Abstract

Objectives

Patients and methods

Results

Conclusions

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Objectives

Patients and methods

Results

Conclusions

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