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Schopper H, Krane NA, Sykes KJ, Yu K, Kriet JD, Humphrey CD. Trends in Maxillomandibular Fixation Technique at a Single Academic Institution. Craniomaxillofac Trauma Reconstr 2024; 17:119-123. [PMID: 38779397 PMCID: PMC11107819 DOI: 10.1177/19433875231176339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024] Open
Abstract
Study Design Retrospective chart review. Objective Restoration of premorbid occlusion is a key goal in the treatment of mandibular fractures. Placement of the patient in maxillomandibular fixation (MMF) is performed during mandibular fracture repair to help establish occlusion. A number of techniques are available to achieve MMF. We sought to examine trends in MMF technique at our institution. Methods A retrospective chart review was conducted to evaluate patients who underwent surgical treatment of mandibular fractures between January 1, 2011 and March 31, 2021. Data including fracture characteristics, mechanism of injury, patient demographics, complication rates, and MMF technique utilized were collected. Results One hundred sixty-three patients underwent MMF (132 males). The most common etiology of fracture was assault (34%). There was an increasing preference for rapid MMF techniques over time, as opposed to standard Erich arch bars. No significant difference in obtaining adequate fracture reduction as determined by postoperative imaging or complications were noted between those who underwent MMF with newer rapid techniques vs traditional MMF techniques. Conclusions Our institution has demonstrated changing trends in the technique utilized for establishing occlusion intraoperatively, more recently favoring rapid MMF techniques, with similar rates of complications and ability to adequately reduce fractures.
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Affiliation(s)
- Heather Schopper
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas Medical Center, Kansas City, KS, USA
| | - Natalie A. Krane
- Department of Otolaryngology, Head and Neck Surgery, Oregon Health & Science University, Portland, OR, USA
| | - Kevin J. Sykes
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas Medical Center, Kansas City, KS, USA
| | - Katherine Yu
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas Medical Center, Kansas City, KS, USA
| | - J. David Kriet
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas Medical Center, Kansas City, KS, USA
| | - Clinton D. Humphrey
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas Medical Center, Kansas City, KS, USA
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Kalluri MH, Edalatpour A, Thadikonda KM, Blum JD, Garland CB, Cho DY. Patient outcomes and complications following various maxillomandibular fixation techniques: A systematic review and meta-analysis. J Plast Reconstr Aesthet Surg 2024; 92:151-176. [PMID: 38520780 DOI: 10.1016/j.bjps.2024.02.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 02/29/2024] [Indexed: 03/25/2024]
Abstract
PURPOSE Currently, there are several methods of achieving maxillomandibular fixation (MMF), each with its unique operative considerations and subsequent patient outcomes and complications. In this study, we reviewed the literature to evaluate and compare all MMF methods. METHODS A systematic review of all MMF types was conducted and post-operative outcome data were analyzed and compared among the different types. Conventional Erich arch bars were compared to hybrid arch bars, MMF screws, and eyelet interdental wiring. A random-effects meta-analysis was used to determine the mean differences, and 95% confidence intervals (CIs) with a statistical significance of P < 0.05. RESULTS Among the 4234 articles identified, 24 were included, and 17 were meta-analyzed. Time to achieve MMF (-43.38 min; 95% CI, -58.20 to -28.56; P < 0.001), total operative time (-30.33 min; 95% CI, -61.05 to 0.39; P = 0.05), incidence of wire puncture injuries and glove perforations (0.11; 95% CI, 0.04 to 0.30; P < 0.001), and incidence of poor oral hygiene (0.08; 95% CI, 0.02 to 0.28; P < 0.001) were lower for alternative MMF interventions compared to those of the conventional Erich arch bars. CONCLUSIONS Alternative MMF methods required shorter operative time to achieve MMF and demonstrated other increased efficiencies of practice such as shorter total operative time and decreased glove perforations, when compared to conventional Erich arch bars. If a patient is a candidate for MMF, the presented alternative MMF techniques should be considered depending on the clinical context and availability of institutional resources.
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Affiliation(s)
- Manasa H Kalluri
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Armin Edalatpour
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Kishan M Thadikonda
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Jessica D Blum
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Catharine B Garland
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Daniel Y Cho
- Division of Plastic and Reconstructive Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
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Wood Matabele KL, Seitz AJ, Doan TC, Poore SO. Risk Factors for Acute Postoperative Complications Following Operative Management of Le Fort Fractures-A NSQIP Study. J Craniofac Surg 2023; 34:1181-1184. [PMID: 36991535 DOI: 10.1097/scs.0000000000009297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 12/27/2022] [Indexed: 03/31/2023] Open
Abstract
INTRODUCTION Le Fort fractures comprise a pattern of complex midfacial fractures that arise secondarily to craniofacial trauma. Although management of these fractures has been detailed within the literature, there is a paucity of research examining postoperative outcomes after surgical repair. The primary aim of this study is to assess patient outcomes after operative management of Le Fort fractures, and examine factors influencing the risk for developing postoperative complications, through utilization of the ACS-NSQIP database. METHODS The American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database was queried for cases recorded between 2012 and 2019 with International Classification of Disease (ICD)-9 and ICD-10 codes corresponding to Le Fort fractures. Patient demographics, clinical variables, and postoperative variables were recorded. Logistic regression analysis was conducted to identify independent risk factors for postoperative complications. RESULTS Identification of cases with appropriate ICD codes, and exclusion of those with missing data, yielded 562 patients for analysis. There were no cases of minor complications and 14 cases of severe complications (3 cases of wound dehiscence, 3 cases of transfusion requirement, 1 case of failure to wean from the ventilator for more than 48 h, 1 pulmonary embolism, and 8 cases of reoperation), corresponding to an overall complication rate of 2.49%. Logistic regression analysis revealed steroid use as an independent predictor of severe postoperative complications (OR =13.73, 95% CI: 1.08-128.02, P =0.02). CONCLUSION The present study is the first to conduct a risk factor analysis of patients with Le Fort fractures using the ACS-NSQIP national database. The overall postoperative complication rate was 2.49%, with 14 cases of complications recorded in 8 years. Although this may suggest that surgical management of Le Fort fractures is generally well-tolerated, it should be noted that this problem is frequently associated with other severe injuries of the head and neck that may influence patient prognosis. Given this, further analysis would benefit from a larger patient cohort and longer postoperative data as the ACS-NSQIP database only records outcomes within 30 days.
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Affiliation(s)
- Kasey Leigh Wood Matabele
- University of Wisconsin School of Medicine and Public Health, Division of Plastic Surgery, Madison, WI
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Fernandes IA, Lopes ABS, Fonseca PG, da Silva Torres A, Rodrigues AB, Galvão EL, Falci SGM. Comparison between Erich arch bars and intermaxillary screws in maxillofacial fractures involving the dental occlusion: a meta-analysis. Int J Oral Maxillofac Surg 2020; 50:83-95. [PMID: 32798159 DOI: 10.1016/j.ijom.2020.07.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/08/2020] [Accepted: 07/21/2020] [Indexed: 11/25/2022]
Abstract
This systematic review aimed to compare the Erich arch bars (EABs) with intermaxillary fixation (IMF) screws in maxillofacial fractures involving dental occlusion on perioperative parameters. Four electronic databases were searched: MedLine (Pubmed), Web of Science, VHL, and Cochrane Library. Inclusion criteria comprised clinical trials comparing the two IMF methods, assessing at least one of the outcomes: occlusal stability, oral hygiene, quality of life, time to apply and remove IMF appliances, and complications. Risk of bias was evaluated through the Cochrane risk of bias tool. Fifteen papers were included in the qualitative analysis and 12 of those in the meta-analysis. Times for EABs application (mean difference (MD) 46.83; 95% confidence interval (CI): 30.63-63.02) and removal (MD 22.89; 95% CI 14.61-31.17) were longer compared with IMF screws. There is higher risk of glove perforation (risk ratio (RR) 3.81; 95% CI 2.41-6.04) and lower risk of iatrogenic injuries (RR 0.21; 95% CI 0.09-0.48) when placing EABs compared with IMF screws. No significant differences in plaque index were found (MD 1.07; 95% CI -0.17 to 2.31). The quality of this evidence ranged from very low to low and was mainly compromised by risk of bias assessment. Further studies are necessary to evaluate transurgical IMF stability and postoperative occlusal quality and quality of life when comparing EABs with IMF screws.
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Affiliation(s)
- I A Fernandes
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil.
| | - A B S Lopes
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - P G Fonseca
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - A da Silva Torres
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - A B Rodrigues
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - E L Galvão
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - S G M Falci
- Department of Dentistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
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Fracture propagation associated with intermaxillary fixation screws in maxillofacial trauma. Int J Oral Maxillofac Surg 2019; 49:491-495. [PMID: 31570287 DOI: 10.1016/j.ijom.2019.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 06/17/2019] [Accepted: 09/12/2019] [Indexed: 11/22/2022]
Abstract
Intermaxillary fixation (IMF) screws are commonly used for maxillomandibular immobilization in the management of mandible fractures as definitive closed reduction treatment or in adjunct intraoperatively. In this report, we present three cases of isolated unilateral mandible fractures, in which IMF screws were used and resulted in propagation of a second fracture on the contralateral side, at the site where IMF screws were placed during the surgery. The use of IMF screws has many advantages with an overall low risk of morbidity, however, there are potential complications that must be recognized.
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The Healthcare Cost of Mandibular Nonunions. J Craniofac Surg 2019; 30:2539-2541. [PMID: 31261344 DOI: 10.1097/scs.0000000000005710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The aim of this retrospective cohort study was to compare the costs and characteristics between isolated mandible fractures and mandibular nonunions. From October 2015 to December 2016, the National Inpatient Sample (NIS) was searched for patients admitted with a primary diagnosis of a mandible fracture. The sample was divided between those admitted for an initial evaluation of an isolated fracture and a fracture nonunion. Demographic descriptors, injury characteristics, and inpatient factors were recorded. A total of 1432 patients were included in the final sample, of whom 51 (3.6%) were admitted for a nonunion. Nonunion patients were significantly older (P < 0.01), and nonunions were more often localized to the body (24 vs 11%; P = 0.02). Compared to that of isolated fractures, a greater proportion of nonunions required open reduction and internal fixation (86 vs 59%; P < 0.01) and bone grafting (37 vs 1.4%; P < 0.01), and nonunions imparted +32.6% greater hospitals costs (median: $10,680 vs 14,162; P < 0.01). In conclusion, compared to isolated mandible fractures, mandibular nonunions occurred in older patients, had a higher frequency in body of the mandible, and utilized significantly more hospital resources per admission.
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Edmunds MC, McKnight TA, Runyan CM, Downs BW, Wallin JL. A Clinical Comparison and Economic Evaluation of Erich Arch Bars, 4-Point Fixation, and Bone-Supported Arch Bars for Maxillomandibular Fixation. JAMA Otolaryngol Head Neck Surg 2019; 145:536-541. [PMID: 30946454 DOI: 10.1001/jamaoto.2019.0183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Importance Erich arch bars, 4-point fixation, and bone-supported arch bars are currently used in maxillomandibular fixation, although to what extent they differ in terms of overall charges and clinical outcomes has yet to be reported. Objective To determine the association of Erich arch bars, 4-point fixation, and bone-supported arch bars in maxillomandibular fixation with hospital charges and clinical outcomes. Design, Setting, and Participants This historical cohort included 93 patients with mandible fracture who underwent maxillomandibular fixation from January 1, 2005, to June 30, 2015, at a tertiary care center. Statistical analysis was conducted from October 4, 2015, to September 8, 2017. Main Outcomes and Measures Charge analysis from an institutional perspective, operative time, necessity for a secondary procedure, and postoperative complications. Results Of the 93 patients in the study (18 women and 75 men; median age, 28.0 years [interquartile range, 23.0-40.0 years]), 27 (29%) received Erich arch bars, 51 (55%) received 4-point fixation, and 15 (16%) received bone-supported arch bars. The mean operative time for Erich arch bars (98.7 minutes; 95% CI, 89.2-108.2 minutes) was significantly longer than for 4-point fixation (48.8 minutes; 95% CI, 41.8-55.7 minutes) and bone-supported arch bars (55.9 minutes; 95% CI, 43.1-68.6 minutes). A total of 17 patients who received Erich arch bars (63%), 37 patients who received 4-point fixation (72%), and 1 patient who received bone-supported arch bars (7%) needed to return to the operating room for hardware removal. Patients who received Erich arch bars and those who received 4-point fixation had significantly higher odds of requiring a secondary procedure than did patients who received bone-supported arch bars (Erich arch bars: odds ratio, 27.1; 95% CI, 2.7-274.6; and 4-point fixation: odds ratio, 42.8; 95% CI, 4.4-420.7). Mean total operative charges for application of the hardware alone were significantly less for 4-point fixation ($5290; 95% CI, $4846-$5733) and bone-supported arch bars ($6751; 95% CI, $5936-$7566) than for Erich arch bars ($7919; 95% CI, $7311-$8527). When secondary procedure charges were included, the mean total charge for Erich arch bars ($9585; 95% CI, $8927-$10 243) remained significantly more expensive than the mean total for 4-point fixation ($7204; 95% CI, $6724-$7684) and bone-supported arch bars ($6924; 95% CI, $6042-$7807). No clinically meaningful difference in complications between groups was found (Erich arch bars, 3 [11%]; 4-point fixation, 5 [10%]; and bone-supported arch bars, 2 [13%]). Conclusions and Relevance Bone-supported arch bars have comparable complication outcomes, operative time for placement, and overall charges when compared with Erich arch bars and 4-point fixation, and have a lower likelihood of requiring removal in an operative setting.
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Affiliation(s)
- Meade C Edmunds
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - T Alex McKnight
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - Christopher M Runyan
- Department of Plastic and Reconstructive Surgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - Brian W Downs
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - Jordan L Wallin
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
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Kiwanuka E, Iyengar R, Jehle CC, Mehrzad R, Kwan D. The use of Synthes MatrixWAVE bone anchored arch bars for closed treatment of multiple concurrent mandibular fractures. J Oral Biol Craniofac Res 2017; 7:153-157. [PMID: 29123991 DOI: 10.1016/j.jobcr.2017.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/29/2017] [Indexed: 11/19/2022] Open
Abstract
Background Maxillomandibular fixation (MMF) is an important tool in the treatment of facial fractures and bone-anchored arch bar systems have emerged as treatment options. This study illustrates our experience with the Synthes MatrixWAVE MMF system and the novel application in closed treatment of patients with multiple concurrent mandibular fractures. Methods We enrolled eight patients with concurrent mandibular fractures and treated them with the MatrixWAVE MMF system. The malleable arch bars were fitted and then secured using 6-8 mm screws. The arch bar was and either stretched or compressed to ensure optimal positioning. 24-gauge interdental fixation wiring was placed using the fish loop technique on either side of the fracture to achieve stabilization of the mandible fractures. Results All eight patients were retained in MMF until stable occlusion was achieved with clinical evidence of healing, approximately 4-6 weeks. Post-operative Panorex scans did not reveal any evidence of damage to tooth roots. None of the screws became overly embedded in the mucosa secondary to overgrowth; the arch bars were successfully removed in an outpatient setting without local anesthesia. Conclusions The Synthes MatrixWAVE MMF system has unique features such as prominent screw anchor heads and horizontal malleability unique from other bone anchored arch bars. These features allow for completely closed treatment of patients with multiple concurrent mandible fractures.
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Affiliation(s)
- Elizabeth Kiwanuka
- Department of Plastic Surgery, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, United States
| | - Rajiv Iyengar
- Department of Plastic Surgery, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, United States
| | - Charles Christopher Jehle
- Department of Plastic Surgery, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, United States
| | - Raman Mehrzad
- Department of Plastic Surgery, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, United States
| | - Daniel Kwan
- Department of Plastic Surgery, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, United States
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Johnson AW. Dental occlusion ties: A rapid, safe, and non-invasive maxillo-mandibular fixation technology. Laryngoscope Investig Otolaryngol 2017; 2:178-183. [PMID: 28894837 PMCID: PMC5562940 DOI: 10.1002/lio2.77] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 02/12/2017] [Accepted: 02/28/2017] [Indexed: 11/12/2022] Open
Abstract
Objectives For decades, Erich arch bars have been a standard in establishing maxillo‐mandibular fixation (MMF). While reliable, the approach risks sharps injury, consumes operating room time, and inflicts gingival trauma. Newer technologies including screw‐based techniques and “hybrid” techniques have improved MMF by reducing sharps injuries and operating room time, but risk injury to tooth roots, nerves, and gingiva. This study aims to establish the application, strengths, and limitations of dental occlusion ties as a novel alternative in maxillo‐mandibular fixation. Study Design Prospective, non‐blinded, human feasibility clinical trial. Materials and Methods An iterative prototyping process was used to invent dental occlusion ties (brand name: Minne Ties). Development included 3D printing, cadaver prototype testing, human apical embrasure measurement, and ultimately non‐significant risk human clinical trial testing. In the IRB‐approved feasibility clinical trial, the devices were applied to mandible and maxilla fracture candidates with fractures amenable to intra‐operative MMF with open reduction with internal fixation. The ties were removed prior to extubation. Pre‐teens, comminuted fracture patients, and patients requiring post‐operative MMF were excluded. Results Manufactured, sterile prototypes secured MMF successfully in management of unilateral and bilateral mandible and maxilla fractures. All patients reported correction of pre‐operative malocclusion. Application times were typically 12–15 minutes for a single surgeon to achieve MMF. Patients incurred negligible gingival trauma from the technology as the ties require no tissue penetration for application. Conclusions Dental occlusion ties offer a non‐invasive solution featuring operating room efficiency, minimized sharps risk, and less bony and soft tissue trauma than current commercialized solutions. Level of Evidence Therapeutic, IV
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Affiliation(s)
- Alan W Johnson
- Altru Health System, Grand Forks, North Dakota; and Department of Surgery, University of North Dakota School of Medicine & Health Sciences Grand Forks North Dakota
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Hartwig S, Boettner A, Doll C, Voss JO, Hertel M, Preissner S, Raguse JD. Drill-related root injury caused by intraoperative intermaxillary fixation: an analysis of 1067 screw applications. Dent Traumatol 2016; 33:45-50. [PMID: 27681036 DOI: 10.1111/edt.12305] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND/AIMS Intermaxillary fixation is a standard procedure for the treatment of mandibular fractures or in orthognathic surgery. Predrilling for screws poses the risk of accidental tooth root injury, potentially leading to further pathological processes. Limited evidence about accidental tooth injury during intermaxillary fixation is available due to heterogenous study designs. The aim of this study was to evaluate the risk of root trauma using predrilled transgingival fixation screws and the clinical consequences for the affected teeth. MATERIALS AND METHODS In this retrospective study, the data of open reduction and internal fixation surgery files with intraoperative application of predrilled intermaxillary fixation screws were analysed. The postoperative radiographic images were evaluated for the occurrence of tooth root injury. Patients diagnosed with root injury were clinically followed up with respect to the dental health for the affected teeth. RESULTS A total of 133 radiologically diagnosed tooth root injuries were recorded (12.5% of screws). The median follow-up interval was 16 months (range: 3-77 months). The return rate was 49.5% for all patients. Of these, four of the injured teeth (3%) needed endodontic treatment. No toothache was reported, no tooth was lost, and no negative impact on periodontal health was clinically evident. CONCLUSION Intermaxillary fixation with predrilled transgingival screws is a safe way to manage mandibular fractures. The incidence of tooth root injury is not uncommon, but the adverse side effects are rare and the health of the affected teeth is mostly not compromised.
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Affiliation(s)
- Stefan Hartwig
- Department of Oral and Maxillofacial Surgery, Campus Virchow-Clinic, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Andreas Boettner
- Department of Biometry and Clinical Epidemiology, Campus Benjamin-Franklin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Doll
- Department of Oral and Maxillofacial Surgery, Campus Virchow-Clinic, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jan O Voss
- Department of Oral and Maxillofacial Surgery, Campus Virchow-Clinic, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Moritz Hertel
- Department of Oral Medicine, Dental Radiology and Oral Surgery, Campus Benjamin-Franklin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Saskia Preissner
- Department of Operative and Preventive Dentistry, Campus Benjamin-Franklin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jan D Raguse
- Department of Oral and Maxillofacial Surgery, Campus Virchow-Clinic, Charité - Universitätsmedizin Berlin, Berlin, Germany
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