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Article ; Online: Monopolar electrocautery versus sharp dissection in the neck dissection: a retrospective study.

Obermeier, Katharina Theresa / Liokatis, Paris / Smolka, Wenko

2023 Volume 13, Issue 1, Page(s) 4365

Abstract: The cold scalpel/scissors (CS) and the monopolar electrocautery (ME) are still the most commonly used instruments for neck dissection in head and neck oncology. However, a direct comparison of these techniques does not exist. This study aims to compare ... ...

Abstract	The cold scalpel/scissors (CS) and the monopolar electrocautery (ME) are still the most commonly used instruments for neck dissection in head and neck oncology. However, a direct comparison of these techniques does not exist. This study aims to compare these techniques concerning blood loss, the decline of hemoglobin levels, and surgery duration. Data on 200 patients who received tumor resection, neck dissection and either a radial forearm free flap (RFFF)or a primary closure (PC) were examined retrospectively. The patients were divided according to the performed defect closure (RFFF or PC) and the main instrument usedfor the beck dissection (Group 1: RFFF and ME, Group 2: RFFF and CS, Group 3: PC and ME Group 4: PC and CS). The intraoperative blood loss, decline of hemoglobin values and surgery duration were analyzed and compared between the corresponding groups. The patients where the ME was used lost on average 409.93 ml (group 1 vs. 2) and 242.4 ml (group 3 vs. 4) less blood. The median decrease in the hemoglobin levels was by 1.01 g/dL (group 1 vs. 2) and 0.85 g/dL (group 3 vs. 4) lower for the ME. The median surgery duration was by 102 min (group 1 vs. 2) and 83 min (group 3 vs. 4) shorterfor the ME. All differences were statistically significant. Traditional scalpel and scissors used for neck dissection lead to significantly higher blood loss and longer operation time than the monopolar electrocautery.
MeSH term(s)	Humans ; Neck Dissection/methods ; Retrospective Studies ; Dissection ; Plastic Surgery Procedures ; Electrocoagulation
Language	English
Publishing date	2023-03-16
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-31328-x
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Article ; Online: Comparison of histopathological margins after resection of oral squamous cell carcinoma using sharp dissection versus mono-polar electrocautery in T1 and T2 tumors.

Obermeier, Katharina Thesesa / Liokatis, Paris / Smolka, Wenko

Surgical oncology

2023 Volume 51, Page(s) 102010

Abstract: The study aims to compare histopathological margins after resection of oral squamous cell carcinoma (OSCC) with different surgical techniques: conventional sharp resection (SR) with scalpel versus monopolar electrocautery (ME). Hence, the question arises ...

Abstract	The study aims to compare histopathological margins after resection of oral squamous cell carcinoma (OSCC) with different surgical techniques: conventional sharp resection (SR) with scalpel versus monopolar electrocautery (ME). Hence, the question arises whether thermal damage by performing monopolar electrocautery surgery will lead to close margins more frequently than by using scalpels. 152 patients were included in this study. All patients received a primary tumor resection either performed with SR or with ME. Surgical margins were distributed into two groups: ≥5 mm (clear margins) and < 5 mm (close or involved margins). For comparing homogeneous groups, we considered tumor localizations, diameter and depth of invasion. The results were statistically analyzed by applying the Wilcoxon-Mann-Whitney-U-Test. The distribution of tumor diameter and depth of invasion was equal in both groups. There was no statistically significant difference between the amount of free surgical margins using SR or ME (p = 0.884). According to this study, the use of the monopolar electrocautery for tumor resection in the oral cavity does not increase the rate of compromised resection margins compared to the conventional scalpel.
MeSH term(s)	Humans ; Mouth Neoplasms/surgery ; Mouth Neoplasms/pathology ; Carcinoma, Squamous Cell/surgery ; Carcinoma, Squamous Cell/pathology ; Squamous Cell Carcinoma of Head and Neck ; Margins of Excision ; Head and Neck Neoplasms ; Electrocoagulation
Language	English
Publishing date	2023-10-24
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1107810-8
ISSN	1879-3320 ; 0960-7404
ISSN (online)	1879-3320
ISSN	0960-7404
DOI	10.1016/j.suronc.2023.102010
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Article ; Online: Virtual planning for mandible resection and reconstruction.

Probst, Florian Andreas / Liokatis, Paris / Mast, Gerson / Ehrenfeld, Michael

Innovative surgical sciences

2023 Volume 8, Issue 3, Page(s) 137–148

Abstract: In mandibular reconstruction, computer-assisted procedures, including virtual surgical planning (VSP) and additive manufacturing (AM), have become an integral part of routine clinical practice. Especially complex cases with extensive defects after ... ...

Abstract	In mandibular reconstruction, computer-assisted procedures, including virtual surgical planning (VSP) and additive manufacturing (AM), have become an integral part of routine clinical practice. Especially complex cases with extensive defects after ablative tumor surgery benefit from a computer-assisted approach. Various CAD/CAM-manufactured tools such as surgical guides (guides for osteotomy, resection and predrilling) support the transition from virtual planning to surgery. Patient-specific implants (PSIs) are of particular value as they facilitate both osteosynthesis and the positioning of bone elements. Computer-based approaches may be associated with higher accuracy, efficiency, and superior patient outcomes. However, certain limitations should be considered, such as additional costs or restricted availability. In the future, automation of the planning process and augmented reality techniques, as well as MRI as a non-ionizing imaging modality, have the potential to further improve the digital workflow.
Language	English
Publishing date	2023-12-06
Publishing country	Germany
Document type	Journal Article ; Review
ISSN	2364-7485
ISSN (online)	2364-7485
DOI	10.1515/iss-2021-0045
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Article ; Online: Application of the lambda plate on condylar fractures: Finite element evaluation of the fixation rigidity for different fracture patterns and plate placements.

Liokatis, Paris / Tzortzinis, Georgios / Gerasimidis, Simos / Smolka, Wenko

Injury

2022 Volume 53, Issue 4, Page(s) 1345–1352

Abstract: Purpose: The treatment challenges of condylar fractures necessitated the production of several plate designs. Among the relatively new plate designs is the lambda plate, for which biomechanical and clinical data are lacking. The purpose of this study is ...

Abstract	Purpose: The treatment challenges of condylar fractures necessitated the production of several plate designs. Among the relatively new plate designs is the lambda plate, for which biomechanical and clinical data are lacking. The purpose of this study is to examine the rigidity of fixation achieved when the lambda plate is applied to different fractures of the condylar neck and base. Methods: Five fractures of the condylar area were designed on a virtual model of a healthy mandible obtained from a CT scan. The fractures were reduced using the lambda plate. For the same fractures, alternative placements of the plate were simulated. The generated models were analysed using the finite element analysis for a 500 N bite load. The displacement of the two condylar fragments along the fracture line was calculated as an indicator of the rigidity of the fixation. Results: The displacement along the fracture was less than 0.144 mm for the neck fractures and greater than 0.165 mm for the fractures of the condylar base. A more cranial placement of the plate for the neck fractures further reduced the displacement, while a more anterior placement of the plate for the base fractures resulted in displacements greater than 0.330 mm. Conclusion: According to our study, the lambda plate offers better rigidity when applied as cranially as possible for condylar neck fractures. The lambda plate did not provide adequate fixation for base fractures. A second plate at the sigmoid notch should be considered to achieve better stabilization along the fracture if the lambda plate is eventually used.
MeSH term(s)	Biomechanical Phenomena ; Bone Plates ; Finite Element Analysis ; Fracture Fixation, Internal ; Humans ; Mandibular Condyle/diagnostic imaging ; Mandibular Condyle/surgery ; Mandibular Fractures/diagnostic imaging ; Mandibular Fractures/surgery
Language	English
Publishing date	2022-01-21
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	218778-4
ISSN	1879-0267 ; 0020-1383
ISSN (online)	1879-0267
ISSN	0020-1383
DOI	10.1016/j.injury.2022.01.032
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Zs.A 778: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Der Blick in den Mund.

Urich, Julia / Liokatis, Paris / Pannenbäcker, Laura

MMW Fortschritte der Medizin

2022 Volume 164, Issue 16, Page(s) 52–53

Title translation	The oral cavity - manifestations of systemic diseases.
MeSH term(s)	Humans ; Mouth/pathology ; Mouth Diseases/etiology
Language	German
Publishing date	2022-09-16
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	1478211-x
ISSN	1613-3560 ; 1438-3276
ISSN (online)	1613-3560
ISSN	1438-3276
DOI	10.1007/s15006-022-1820-0
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Ua VI Zs.20: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)
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Book ; Online ; Thesis: Miniplatten aus Titan zur Fixation von Gelenkfortsatzfrakturen des Unterkiefers: Evaluation des biomechanischen Verhaltens mittels der Finite-Elemente-Analyse

Liokatis, Paris Georgios [Verfasser] / Smolka, Wenko [Akademischer Betreuer]

2023

Author's details	Paris Georgios Liokatis ; Betreuer: Wenko Smolka
Keywords	Medizin, Gesundheit ; Medicine, Health
Subject code	sg610
Language	English
Publisher	Universitätsbibliothek der Ludwig-Maximilians-Universität
Publishing place	München
Document type	Book ; Online ; Thesis
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Article ; Online: Finite element analysis of different titanium miniplates: Evaluation of three-dimensional designs applied on condylar neck fractures.

Liokatis, Paris / Tzortzinis, Georgios / Gerasimidis, Simos / Smolka, Wenko

Journal of stomatology, oral and maxillofacial surgery

2021 Volume 123, Issue 2, Page(s) 184–190

Abstract: Introduction: The fixation of condylar neck fractures is raising difficulties and for this reason, many plate designs have been developed. The current study compares the performance of four miniplates used in the condylar neck.: Material and methods: ...

Abstract	Introduction: The fixation of condylar neck fractures is raising difficulties and for this reason, many plate designs have been developed. The current study compares the performance of four miniplates used in the condylar neck. Material and methods: A virtual condylar neck fracture in a mandible obtained from a CT scan was fixed with four miniplates (two straight miniplates, lambda, strut, and trapezoidal). Using finite element analysis, we examined the fragments' displacements and stress distribution in the titanium material and bone. The models were analyzed under two loading conditions: a reduced bite force of 135 N and a force of 500 N. Results: No risk of material failure was observed. For a load of 135 N, all four plates offer an adequate fixation. For 500 N of applied loading, the lambda and strut plates showed the best rigidity and lowest bone strains. The two parallel plates showed the lowest rigidity and the trapezoidal plate the highest bone strains around all screws. Discussion: These findings imply that three-dimensional miniplates (lambda, strut) perform better when higher loads are applied. On the other hand, the trapezoidal plate has an increased risk of screw loosening and the two straight plates higher mobility of the fragments.
MeSH term(s)	Bone Plates ; Finite Element Analysis ; Fracture Fixation, Internal ; Humans ; Mandibular Condyle/surgery ; Mandibular Fractures/surgery ; Titanium
Chemical Substances	Titanium (D1JT611TNE)
Language	English
Publishing date	2021-06-26
Publishing country	France
Document type	Journal Article
ZDB-ID	2916276-2
ISSN	2468-7855 ; 2468-8509
ISSN (online)	2468-7855
ISSN	2468-8509
DOI	10.1016/j.jormas.2021.06.011
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Article ; Online: Lymph nodal recurrence in levels IV and V in oral squamous cell carcinoma after neck dissection.

Obermeier, Katharina Theresa / Liokatis, Paris / Haidari, Selgai / Kakoschke, Tamara Katharina / Kraus, Moritz / Smolka, Wenko

ANZ journal of surgery

2023 Volume 93, Issue 6, Page(s) 1688–1693

Abstract: Background: The aim of the study was to determine the risk of lymph node recurrence in levels IV and V after tumour resection and neck dissection of level I-III and level I-V.: Methods: Data from 228 patients suffering from OSCC were analysed ... ...

Abstract	Background: The aim of the study was to determine the risk of lymph node recurrence in levels IV and V after tumour resection and neck dissection of level I-III and level I-V. Methods: Data from 228 patients suffering from OSCC were analysed retrospectively. Patients with level I-III neck dissection were compared to those with level I-V neck dissection in terms of number and location of nodal recurrence. The incidence of level IV-V recurrence in patients who had received level I-III neck dissection was compared with that of patients who had received level I-V neck dissection. The incidence of level IV-V recurrence was also compared between patients with pN0 and pN+ necks. Results: Overall, 19 patients developed metastases. Only in two cases appeared nodal recurrence in levels IV or V. There was no statistically significant difference between both groups. Conclusions: Neck dissection of levels I-III seems to be sufficient treatment in cases of unsuspicious lymph nodes in levels IV and V, even in cases of positive nodes in levels I-III if adjuvant radiation therapy is applied. However, 5-year-disease free survival rate is lower in patients with nodal metastases in levels IV and V than in patients with metastases located in levels I-III.
MeSH term(s)	Humans ; Neck Dissection ; Carcinoma, Squamous Cell/pathology ; Squamous Cell Carcinoma of Head and Neck/surgery ; Mouth Neoplasms/surgery ; Mouth Neoplasms/pathology ; Retrospective Studies ; Neoplasm Staging ; Lymphatic Metastasis/pathology ; Lymph Nodes/pathology ; Neck/pathology ; Head and Neck Neoplasms/surgery
Language	English
Publishing date	2023-04-23
Publishing country	Australia
Document type	Journal Article
ZDB-ID	2050749-5
ISSN	1445-2197 ; 1445-1433 ; 0004-8682
ISSN (online)	1445-2197
ISSN	1445-1433 ; 0004-8682
DOI	10.1111/ans.18466
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Zs.A 180: Show issues

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Book ; Online ; Thesis: Vergleich der präoperativen Planung mit dem postoperativen Ergebnis bei computergestützt geplanten posttraumatischen Rekonstruktionen des Mittelgesichts

Liokatis, Paris Georgios [Verfasser] / Probst, Florian [Akademischer Betreuer]

eine retrospektive Erhebung

2022

Author's details	Paris Georgios Liokatis ; Betreuer: Florian Probst
Keywords	Medizin, Gesundheit ; Medicine, Health
Subject code	sg610
Language	English
Publisher	Universitätsbibliothek der Ludwig-Maximilians-Universität
Publishing place	München
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article ; Online: Evaluation of Complications After Open Reduction and Internal Fixation of Mandibular Condylar Base and Neck Fractures Using Trapezoidal Plates.

Smolka, Wenko / Liokatis, Paris / Cornelius, Carl-Peter

The Journal of craniofacial surgery

2020 Volume 31, Issue 5, Page(s) 1287–1290

Abstract: The purpose of the study was to evaluate the different fracture pattern of patients being treated with trapezoidal plate fixation of condylar base and neck fractures using the AOCMF Classification System to determine specific fracture pattern that are ... ...

Abstract	The purpose of the study was to evaluate the different fracture pattern of patients being treated with trapezoidal plate fixation of condylar base and neck fractures using the AOCMF Classification System to determine specific fracture pattern that are associated with failure of trapezoidal plate fixation. Ten patients with mandibular condylar base and neck fractures underwent internal fixation using trapezoidal plates. Fractures of the condylar process were classified according to the AOCMF Classification System using computed tomography data. The fracture pattern was compared to complications according to hardware failure such as plate or screw loosening and plate fracture. Plate and screw loosening of trapezoidal plates for fixation of condylar base and neck fractures was associated with fracture location in the neck region and major fragment displacement with contact loss between the proximal and distal fragment of the fracture. Further investigations such as finite-element analysis of different plating systems for fixation of condylar neck fractures are necessary to establish the optimal fixation technique for condylar neck fractures.
MeSH term(s)	Adult ; Aged ; Bone Plates ; Bone Screws ; Female ; Femoral Neck Fractures/surgery ; Finite Element Analysis ; Fracture Fixation, Internal ; Humans ; Mandibular Condyle/surgery ; Mandibular Fractures/surgery ; Middle Aged ; Open Fracture Reduction ; Postoperative Complications ; Spinal Fractures/surgery
Language	English
Publishing date	2020-06-17
Publishing country	United States
Document type	Evaluation Study ; Journal Article
ZDB-ID	1159501-2
ISSN	1536-3732 ; 1049-2275
ISSN (online)	1536-3732
ISSN	1049-2275
DOI	10.1097/SCS.0000000000006486
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