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Al-Haj Husain A, Schönegg D, Valdec S, Stadlinger B, Gander T, Essig H, Piccirelli M, Winklhofer S. Visualization of Inferior Alveolar and Lingual Nerve Pathology by 3D Double-Echo Steady-State MRI: Two Case Reports with Literature Review. J Imaging 2022; 8:jimaging8030075. [PMID: 35324630 PMCID: PMC8954741 DOI: 10.3390/jimaging8030075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/10/2022] [Accepted: 03/14/2022] [Indexed: 01/25/2023] Open
Abstract
Injury to the peripheral branches of the trigeminal nerve, particularly the lingual nerve (LN) and the inferior alveolar nerve (IAN), is a rare but serious complication that can occur during oral and maxillofacial surgery. Mandibular third molar surgery, one of the most common surgical procedures in dentistry, is most often associated with such a nerve injury. Proper preoperative radiologic assessment is hence key to avoiding neurosensory dysfunction. In addition to the well-established conventional X-ray-based imaging modalities, such as panoramic radiography and cone-beam computed tomography, radiation-free magnetic resonance imaging (MRI) with the recently introduced black-bone MRI sequences offers the possibility to simultaneously visualize osseous structures and neural tissue in the oral cavity with high spatial resolution and excellent soft-tissue contrast. Fortunately, most LN and IAN injuries recover spontaneously within six months. However, permanent damage may cause significant loss of quality of life for affected patients. Therefore, therapy should be initiated early in indicated cases, despite the inconsistency in the literature regarding the therapeutic time window. In this report, we present the visualization of two cases of nerve pathology using 3D double-echo steady-state MRI and evaluate evidence-based decision-making for iatrogenic nerve injury regarding a wait-and-see strategy, conservative drug treatment, or surgical re-intervention.
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Affiliation(s)
- Adib Al-Haj Husain
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (S.V.); (B.S.)
| | - Daphne Schönegg
- Clinic of Cranio-Maxillofacial and Oral Surgery, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland; (D.S.); (T.G.); (H.E.)
| | - Silvio Valdec
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (S.V.); (B.S.)
| | - Bernd Stadlinger
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (S.V.); (B.S.)
| | - Thomas Gander
- Clinic of Cranio-Maxillofacial and Oral Surgery, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland; (D.S.); (T.G.); (H.E.)
| | - Harald Essig
- Clinic of Cranio-Maxillofacial and Oral Surgery, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland; (D.S.); (T.G.); (H.E.)
| | - Marco Piccirelli
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland;
| | - Sebastian Winklhofer
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland;
- Correspondence: ; Tel.: +41-44-253-83-96
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Comparison of Preoperative Cone-Beam Computed Tomography and 3D-Double Echo Steady-State MRI in Third Molar Surgery. J Clin Med 2021; 10:jcm10204768. [PMID: 34682896 PMCID: PMC8540951 DOI: 10.3390/jcm10204768] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/05/2021] [Accepted: 10/15/2021] [Indexed: 12/26/2022] Open
Abstract
We investigated the reliability of assessing a positional relationship between the inferior alveolar nerve (IAN) and mandibular third molar (MTM) based on CBCT, 3D-DESS MRI, and CBCT/MRI image fusion. Furthermore, we evaluated qualitative parameters such as inflammatory processes and imaging fusion patterns. Therefore, two raters prospectively assessed in 19 patients with high-risk MTM surgery cases several parameters for technical image quality and diagnostic ability using modified Likert rating scales. Inter- and intra-reader agreement was evaluated by performing weighted kappa analysis. The inter- and intra-reader agreement for the positional relationship was moderate (κ = 0.566, κ = 0.577). Regarding the detectability of inflammatory processes, the agreement was substantial (κ = 0.66, κ = 0.668), with MRI providing a superior diagnostic benefit regarding early inflammation detection. Independent of the readers’ experience, the agreement of judgment in 3D-DESS MRI was adequate. Black bone MRI sequences such as 3D-DESS MRI providing highly confidential preoperative assessment in MTM surgery have no significant limitations in diagnostic information. With improved cost and time efficiency, dental MRI has the potential to establish itself as a valid alternative in high-risk cases compared to CBCT in future clinical routine.
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Al-Haj Husain A, Solomons M, Stadlinger B, Pejicic R, Winklhofer S, Piccirelli M, Valdec S. Visualization of the Inferior Alveolar Nerve and Lingual Nerve Using MRI in Oral and Maxillofacial Surgery: A Systematic Review. Diagnostics (Basel) 2021; 11:diagnostics11091657. [PMID: 34573998 PMCID: PMC8471876 DOI: 10.3390/diagnostics11091657] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/06/2021] [Accepted: 09/07/2021] [Indexed: 12/02/2022] Open
Abstract
We evaluate the preoperative visualization of the inferior alveolar nerve (IAN) and lingual nerve (LN) as reported using radiation-free magnetic resonance imaging (MRI). An accurate visualization shall minimize the postoperative risk for nerve injuries in oral and maxillofacial surgery. PubMed MEDLINE, EMBASE, Biosis, and Cochrane databases were selected for the PICOS search strategy by two reviewers using medical subject headings (MeSH) terms. Thirty studies were included in the systematic review. Based on these studies’ findings, the use of black bone MRI sequences, especially 3D short-tau inversion recovery (STIR), provides superior soft-tissue resolution and high sensitivity in detecting pathological changes. Due to the implementation variability regarding scan parameters and the use of different magnetic field strengths, studies with well-designed protocols and a low risk of bias should be conducted to obtain stronger evidence. With improved cost and time efficiency and considering the benefit–risk ratio, MRI is a promising imaging modality that could become part of routine clinical practice in the future.
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Affiliation(s)
- Adib Al-Haj Husain
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (M.S.); (B.S.); (R.P.)
| | - Mark Solomons
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (M.S.); (B.S.); (R.P.)
| | - Bernd Stadlinger
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (M.S.); (B.S.); (R.P.)
| | - Rada Pejicic
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (M.S.); (B.S.); (R.P.)
| | - Sebastian Winklhofer
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland; (S.W.); (M.P.)
| | - Marco Piccirelli
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, 8091 Zurich, Switzerland; (S.W.); (M.P.)
| | - Silvio Valdec
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (A.A.-H.H.); (M.S.); (B.S.); (R.P.)
- Department of Stomatology, Division of Periodontology, Dental School, University of São Paulo, Butantã 2227, SP, Brazil
- Correspondence: ; Tel.: +41-44-634-32-90
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Markiewicz MR, Callahan N, Miloro M. Management of Traumatic Trigeminal and Facial Nerve Injuries. Oral Maxillofac Surg Clin North Am 2021; 33:381-405. [PMID: 34116905 DOI: 10.1016/j.coms.2021.04.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the area of craniomaxillofacial trauma, neurosensory disturbances are encountered commonly, especially with regard to the trigeminal and facial nerve systems. This article reviews the specific microanatomy of both cranial nerves V and VII, and evaluates contemporary neurosensory testing, current imaging modalities, and available nerve injury classification systems. In addition, the article proposes treatment paradigms for management of trigeminal and facial nerve injuries, specifically with regard to the craniomaxillofacial trauma setting.
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Affiliation(s)
- Michael R Markiewicz
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, University at Buffalo, 3435 Main Street, 112 Squire Hall, Buffalo, NY 14214, USA; Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA; Department of Neurosurgery, Division of Pediatric Surgery, Department of Surgery, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA; Craniofacial Center of Western New York, John Oishei Children's Hospital, Buffalo, NY, USA.
| | - Nicholas Callahan
- Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago, Room 110, 801 S. Paulina Street, Chicago, IL 60612, USA; Department of Otolaryngology, Northwestern Memorial Hospital, Chicago, IL, USA
| | - Michael Miloro
- Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago, Room 110, 801 S. Paulina Street, Chicago, IL 60612, USA
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High resolution MRI for quantitative assessment of inferior alveolar nerve impairment in course of mandible fractures: an imaging feasibility study. Sci Rep 2020; 10:11566. [PMID: 32665667 PMCID: PMC7360624 DOI: 10.1038/s41598-020-68501-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/24/2020] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to evaluate a magnetic resonance imaging (MRI) protocol for direct visualization of the inferior alveolar nerve in the setting of mandibular fractures. Fifteen patients suffering from unilateral mandible fractures involving the inferior alveolar nerve (15 affected IAN and 15 unaffected IAN from contralateral side) were examined on a 3 T scanner (Elition, Philips Healthcare, Best, the Netherlands) and compared with 15 healthy volunteers (30 IAN in total). The sequence protocol consisted of a 3D STIR, 3D DESS and 3D T1 FFE sequence. Apparent nerve-muscle contrast-to-noise ratio (aNMCNR), apparent signal-to-noise ratio (aSNR), nerve diameter and fracture dislocation were evaluated by two radiologists and correlated with nerve impairment. Furthermore, dislocation as depicted by MRI was compared to computed tomography (CT) images. Patients with clinically evident nerve impairment showed a significant increase of aNMCNR, aSNR and nerve diameter compared to healthy controls and to the contralateral side (p < 0.05). Furthermore, the T1 FFE sequence allowed dislocation depiction comparable to CT. This prospective study provides a rapid imaging protocol using the 3D STIR and 3D T1 FFE sequence that can directly assess both mandible fractures and IAN damage. In patients with hypoesthesia following mandibular fractures, increased aNMCNR, aSNR and nerve diameter on MRI imaging may help identify patients with a risk of prolonged or permanent hypoesthesia at an early time.
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Sirin Y, Yildirimturk S, Horasan S, Guven K. Diagnostic Potential of Panoramic Radiography and CBCT in Detecting Implant-Related Ex Vivo Injuries of the Inferior Alveolar Canal Border. J ORAL IMPLANTOL 2020; 46:206-213. [PMID: 32030398 DOI: 10.1563/aaid-joi-d-19-00005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this ex vivo study was to compare the diagnostic performances of panoramic radiography and cone beam computerized tomography (CBCT) in detecting implant-related injuries of the inferior alveolar canal. Monocortical bone windows were created in 60 fresh sheep hemimandibles, the inferior alveolar canals were revealed and 120 dental implants were inserted. Three types of injuries, described as pilot drill damage (PDRILL), collapsing of the superior border of the canal (COLL), penetration of the implant tip into the canal (PENET) and one control group, were simulated. Standard (PANO) and dentition mode panoramic (PANO-DENT) images as well as CBCT data presented as multiplanar reconstruction (MPR) and cross-sectional (CROSS) views were evaluated by 6 observers who had also expressed their level of confidence to their final diagnosis. Intra- and interobserver agreement scores were rated good. The area under the curve (AUC) values and the confidence scores for CROSS and multiplanar reformation (MPR) views were both significantly higher than those of PANO and PANO-DENT (P < .05 for each) in PDRILL group. In COLL group, observers showed less confidence to PANO and PANO-DENT compared to CROSS and MPR techniques (P < .05 for each). No other significant differences were found. Within the limits of this experimental study, it can be suggested that the standard and dentition modes of panoramic radiography can be as effective as CBCT in the detection of penetrating and collapsing injuries, but multiplanar and cross-sectional views of the CBCT are more accurate than panoramic radiography in the detection of pilot drill injuries in sheep mandible.
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Affiliation(s)
- Yigit Sirin
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Senem Yildirimturk
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Sinan Horasan
- Teknodent Oral and Maxillofacial Radiology Center, Istanbul, Turkey
| | - Koray Guven
- Department of Radiodiagnostics, Faculty of Medicine, Mehmet Ali Aydınlar Acibadem University, Istanbul, Turkey
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Menziletoglu D, Tassoker M, Kubilay-Isik B, Esen A. The assesment of relationship between the angulation of impacted mandibular third molar teeth and the thickness of lingual bone: A prospective clinical study. Med Oral Patol Oral Cir Bucal 2019; 24:e130-e135. [PMID: 30573722 PMCID: PMC6344005 DOI: 10.4317/medoral.22596] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 11/29/2018] [Indexed: 11/11/2022] Open
Abstract
Background Our purpose was to investigate the relationship between the angulation of mandibular third molars and the thickness of the lingual bone, which can affect the risk of lingual nerve damage during lower third molars surgical extraction. Material and Methods This study consisted of 104 patients (42 males and 62 females), aged between 18-42 years (24.67 ± 6.11 years). Cone Beam Computed Tomography (CBCT) images were taken for preoperative assessment. The teeth were divided into four groups according to their positions: mesioangular, distoangular, vertical and horizontal. Lingual bone thickness around impacted teeth were measured at three points: cementoenamel junction (CEJ) of the mandibular second molar, mid-root of the impacted third molar, and apex of the impacted third molar root. Two predisposing factors of lingual nerve damage were recorded: lingual bone perforated by the impacted tooth and lingual bone thinner than 1 mm. Additionally, buccolingual angulations of the teeth in each group were measured.
Impacted mandibular third molars were removed in usual way. One week after surgery, the patients were evaluated regarding lingual nerve paresthesia. Results None of the 104 patients experienced paresthesia, including the ones who had teeth with close proximity with lingual nerve. The mean thickness of bone was 1.21±0.63 mm at CEJ of the second molar; 1.25±1.02 mm at the mid-root; and 1.06±1.31 mm at the apex. Horizontally impacted teeth had thinner lingual bone at mid-root level (p=0.016). Buccolingual angulated teeth were more often associated with perforated lingual bone (p=0.002). Buccolingual and mesial/distal angulation had negative correlation with lingual bone thickness (p<0.05). Conclusions As the buccolingual and mesiodistal angulations increase, lingual bone thickness decreases. Horizontally impacted teeth seemed to compromise the integrity of the lingual bone more than impacted teeth in other positions. During the surgery, thin or perforated lingual bone may result in displacement of the impacted tooth lingually. Key words:Lingual bone, impacted third molar, cone beam computed tomography, angulation, paresthesia.
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Affiliation(s)
- D Menziletoglu
- Necmettin Erbakan University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Karacigan Mah Ankara Cad No:74, Karatay- KONYA/ TURKEY,
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Abstract
Dental paresthesia is loss of sensation caused by maxillary or mandibular anesthetic administration before dental treatment. This review examines inferior alveolar block paresthesia symptoms, side effect and complications. Understanding the anatomy of the pterygomandibular fossa will help in understanding the nature and causes of the dental paresthesia. In this review, we review the anatomy of the region surrounding inferior alveolar injections, anesthetic agents and also will look also into the histology and injury process of the inferior alveolar nerve.
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Affiliation(s)
- Maha Ahmad
- Department of Biomedical and Diagnostic Sciences, School of Dentistry, University of Detroit Mercy, Detroit, MI 48208, USA
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Probst M, Richter V, Weitz J, Kirschke JS, Ganter C, Troeltzsch M, Nittka M, Cornelius CP, Zimmer C, Probst FA. Magnetic resonance imaging of the inferior alveolar nerve with special regard to metal artifact reduction. J Craniomaxillofac Surg 2017; 45:558-569. [DOI: 10.1016/j.jcms.2017.01.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 12/08/2016] [Accepted: 01/09/2017] [Indexed: 11/30/2022] Open
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Tolstunov L, Brickeen M, Kamanin V, Susarla SM, Selvi F. Is the angulation of mandibular third molars associated with the thickness of lingual bone? Br J Oral Maxillofac Surg 2016; 54:914-919. [DOI: 10.1016/j.bjoms.2016.06.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 06/10/2016] [Indexed: 11/26/2022]
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Weckx A, Agbaje JO, Sun Y, Jacobs R, Politis C. Visualization techniques of the inferior alveolar nerve (IAN): a narrative review. Surg Radiol Anat 2015; 38:55-63. [PMID: 26163825 PMCID: PMC4744261 DOI: 10.1007/s00276-015-1510-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/10/2015] [Indexed: 11/28/2022]
Abstract
Purpose The purpose of this study was to produce an overview of the present visualization techniques of the inferior alveolar nerve (IAN) in order to reduce the rates of nerve damage after third molar (M3) removal and bilateral sagittal split osteotomy (BSSO). Methods An electronic literature search was performed of the English-language scientific literature published prior to December 31, 2014 using the LIMO KU Leuven search platform. Information on the specifications of the different imaging techniques, their clinical application, advantages, disadvantages, and duration was extracted from 11 reports. Results Five methods for IAN visualization were obtained from the search results, which are cone-beam computed tomography (CBCT) and automatic extraction of the IAN canal using computed tomography (CT), magnetic resonance imaging (MRI), panoramic radiography, endoscopy, and ultrasonographic visualization. Conclusion The results of this study suggest that high-resolution MRI is the most commonly used method for direct visualization of the IAN. Six out of the eleven manuscripts use this technique. Recently, there have been some (experimental) modifications to the conventional MRI in the form of diffusion tensor tractography (DTT), phase-contrast magnetic resonance angiography (PC-MRA), and dental MRI. Future studies will focus on an intraoperative application of MRI to visualize the IAN during surgery.
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Affiliation(s)
- Annelies Weckx
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.
| | - Jimoh Olubanwo Agbaje
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Yi Sun
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Constantinus Politis
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.,OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
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Miloro M, Ruckman P, Kolokythas A. Lingual Nerve Repair: To Graft or Not to Graft? J Oral Maxillofac Surg 2015; 73:1844-50. [PMID: 25865714 DOI: 10.1016/j.joms.2015.03.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/05/2015] [Accepted: 03/05/2015] [Indexed: 11/27/2022]
Abstract
PURPOSE Since no studies have compared direct and graft repair of the lingual nerve, we examined the subjective and objective outcomes of lingual nerve repair by direct epineurial repair and indirect graft repair, assessed the effect of other confounding variables, and compared the outcomes of autograft and allograft repairs. PATIENTS AND METHODS All patients who had undergone microneurosurgical repair of the lingual nerve from 2000 to 2012 by 1 surgeon (M.M.) were asked to complete an online questionnaire regarding their current neurosensory status at least 2 years after nerve repair. A direct comparison was made between patients who had undergone direct epineurial repair and those who had undergone interpositional nerve graft repair. Student's t test and χ(2) test were used to determine whether a significant difference existed in the success between the 2 techniques and whether age, gender, race, delay from injury to repair, or degree of initial nerve deficit influenced the success of nerve repair. RESULTS Of the 72 patients identified, 43, who had undergone 47 nerve repairs (18 direct, 29 indirect graft repairs [4 bilateral]; 28 female and 19 male patients; mean age 28.3 years), were interviewed. The objective results of functional sensory recovery, defined by a Medical Research Council Scale grade of S3, S3+, or S4, was 89% for the graft repairs and 85% for the direct repairs (P = .01). The subjective patient satisfaction score (0 to 10 scale) was 8.9 for the graft repairs and 8.1 for the direct repairs (P = .02). The autograft and allograft repairs performed comparably, and the other variables (ie, age, gender, race, delay from injury to nerve repair, gap length, and initial Sunderland grade injury) were not found to be significant (P > .05). CONCLUSION Graft repair of the lingual nerve provides superior long-term (>2 years) objective and subjective outcomes compared with direct repair. This might be because of the lack of tension at the repair site, more freedom with nerve stump preparation, and the addition of neurotropic and neurotrophic factors from the donor nerve graft at the site of injury to augment neurosensory recovery.
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Affiliation(s)
- Michael Miloro
- Professor and Head, Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago College of Dentistry, Chicago, IL.
| | - Phil Ruckman
- Chief Resident, Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago College of Dentistry, Chicago, IL
| | - Antonia Kolokythas
- Associate Professor and Program Director, Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago College of Dentistry, Chicago, IL
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Kjølle GK, Bjørnland T. Low risk of neurosensory dysfunction after mandibular third molar surgery in patients less than 30 years of age. A prospective study following removal of 1220 mandibular third molars. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 116:411-7. [PMID: 24035108 DOI: 10.1016/j.oooo.2013.06.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/21/2013] [Accepted: 06/16/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE The study aims were to estimate the prevalence of neurosensory dysfunction (NSD) and identify risk factors for NSD after mandibular third molar (M3) removal. STUDY DESIGN In this prospective cohort study 864 patients had their M3 removed. Age, gender, surgeon's experience, and radiographic findings were recorded and the outcome variables were NSD and data analyses. RESULTS In 884 patients, 1220 M3 were removed. Fourteen patients reported NSD postoperatively; 10 inferior alveolar nerve (IAN) injury, 3 lingual nerve (LN) and 1 had injury to both. After 5 years the number of patients with NSD of the IAN had decreased to 5, but no change in the LN. CONCLUSION Age and cortical line interruption were significantly associated with the risk of developing sensory dysfunction. All patients younger than 30, and 3 of 8 patients older than 30, had full recovery of the IAN injury. NSD of the LN persisted in all patients.
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Affiliation(s)
- Gry Karina Kjølle
- Senior Resident, Faculty of Dentistry, University of Oslo, Oslo, Norway
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