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Byun SH, Park SY, Yi SM, Park IY, On SW, Jeong CK, Kim JC, Yang BE. Clinical Stability of Bespoke Snowman Plates for Fixation following Sagittal Split Ramus Osteotomy of the Mandible. Bioengineering (Basel) 2023; 10:914. [PMID: 37627799 PMCID: PMC10452001 DOI: 10.3390/bioengineering10080914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/27/2023] Open
Abstract
Maxillofacial skeletal surgery often involves the use of patient-specific implants. However, errors in obtaining patient data and designing and manufacturing patient-specific plates and guides can occur even with accurate virtual surgery. To address these errors, bespoke Snowman plates were designed to allow movement of the mandible. This study aimed to compare the stability of bespoke four-hole miniplates with that of a bespoke Snowman plate for bilateral sagittal split ramus osteotomy (SSRO), and to present a method to investigate joint cavity changes, as well as superimpose virtual and actual surgical images of the mandible. This retrospective study included 22 patients who met the inclusion criteria and underwent orthognathic surgery at a university hospital between 2015 and 2018. Two groups were formed on the basis of the plates used: a control group with four-hole bespoke plates and a study group with bespoke Snowman plates. Stability was assessed by measuring the condyle-fossa space and superimposing three-dimensional virtual surgery images on postoperative cone-beam computed tomography (CBCT) scans. No significant differences were observed in the condyle-fossa space preoperatively and 1 year postoperatively between the control and study groups. Superimposing virtual surgery and CBCT scans revealed minimal differences in the landmark points, with no variation between groups or timepoints. The use of bespoke Snowman plates for stabilizing the mandible following SSRO exhibited clinical stability and reliability similar to those with bespoke four-hole plates. Additionally, a novel method was introduced to evaluate skeletal stability by separately analyzing the condyle-fossa gap changes and assessing the mandibular position.
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Affiliation(s)
- Soo-Hwan Byun
- Department of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea; (S.-H.B.); (S.-Y.P.); (S.-M.Y.); (J.-C.K.)
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - Sang-Yoon Park
- Department of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea; (S.-H.B.); (S.-Y.P.); (S.-M.Y.); (J.-C.K.)
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - Sang-Min Yi
- Department of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea; (S.-H.B.); (S.-Y.P.); (S.-M.Y.); (J.-C.K.)
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - In-Young Park
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Department of Orthodontics, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
| | - Sung-Woon On
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Hallym University Dongtan Sacred Heart Hospital, Hwaseong 18450, Republic of Korea
| | - Chun-Ki Jeong
- Department of Dental Science & Technology, Shingu College, Seongnam 13174, Republic of Korea;
| | - Jong-Cheol Kim
- Department of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea; (S.-H.B.); (S.-Y.P.); (S.-M.Y.); (J.-C.K.)
- Mir Dental Hospital, Daegu 41940, Republic of Korea
| | - Byoung-Eun Yang
- Department of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea; (S.-H.B.); (S.-Y.P.); (S.-M.Y.); (J.-C.K.)
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea; (I.-Y.P.); (S.-W.O.)
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
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Masson A, Veyssiere A, Briant A, Weill P, Preud'homme R, Benateau H. Risk factors for lower border notching after bilateral mandibular sagittal ramus advancement: three-dimensional evaluation. Int J Oral Maxillofac Surg 2022; 52:577-583. [PMID: 36115778 DOI: 10.1016/j.ijom.2022.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/17/2022] [Accepted: 08/29/2022] [Indexed: 11/29/2022]
Abstract
Bilateral sagittal split osteotomy (BSSO) mandibular advancement can cause mandibular lower border notching (MLBN). The objective of this study was to calculate the incidence of MLBN and identify risk factors. This single-centre, retrospective study was performed between January 2018 and November 2020, in the Maxillofacial Surgery Department, Centre Hospitalier Universitaire, Caen. Patients who underwent BSSO advancement and had cone beam computed tomography (CBCT) scans obtained preoperatively, immediately postoperative (within 1 week), and late postoperative (≥1 year) were included. Measurements were made on the CBCT images. A total of 113 patients (226 operated sides) were enrolled. Mean age at the time of surgery was 17 years; 66.4% of patients were female and 33.6% were male. MLBN was observed on 35 operated sides (15.5% of sides). Advanced age (P = 0.002) and the degree of mandibular advancement (P = 0.008) were determined to be risk factors for developing MLBN. Sex, the operated side, third molar removal, and genioplasty were not associated with an increased occurrence of MLBN. Older patient age at the time of surgery and the requirement for a large advancement should be taken into consideration by the surgeon in order to reduce the risk of MLBN by using a modified BSSO procedure or bone grafting.
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Affiliation(s)
- A Masson
- Maxillofacial Surgery and Plastic Surgery Department, Caen University Hospital, Caen, France.
| | - A Veyssiere
- Maxillofacial Surgery and Plastic Surgery Department, Caen University Hospital, Caen, France; Caen Faculty of Medicine, University of Caen Basse Normandie, Caen, France.
| | - A Briant
- Department of Biostatistics, Caen University Hospital, Caen, France.
| | - P Weill
- Maxillofacial Surgery and Plastic Surgery Department, Caen University Hospital, Caen, France.
| | - R Preud'homme
- Maxillofacial Surgery and Plastic Surgery Department, Caen University Hospital, Caen, France.
| | - H Benateau
- Maxillofacial Surgery and Plastic Surgery Department, Caen University Hospital, Caen, France; Caen Faculty of Medicine, University of Caen Basse Normandie, Caen, France.
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Zigterman BGR, Huys SEF, Mommaerts MY. Third-generation slotplates for orthognathic and facial corrective surgery. J Craniomaxillofac Surg 2020; 49:17-23. [PMID: 33229067 DOI: 10.1016/j.jcms.2020.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 07/02/2020] [Accepted: 11/02/2020] [Indexed: 02/03/2023] Open
Abstract
The aim of this study was to retrospectively assess the osteosynthesis material-related morbidity rates of third-generation (3.0) slotplates, and to compare those with the previously researched second-generation (2.0) slotplates. In the 2.0 slotplate design, there were additional tabs in line with the vertical slotted screw hole; in between these tabs, the additional locking screw was placed. In the 3.0 slotplates, these tabs were replaced by a full screw hole for the locking screw, and the 3.0 slotplates are slightly broader than the 2.0 slotplates. Osteosynthesis material-related morbidity rates after Le Fort I-type, zygoma-valgisation, and chin osteotomies were assessed in a cohort receiving 3.0 slotplates in a tertiary care centre and compared to a previously analysed cohort receiving 2.0 slotplates in the same tertiary care centre. Medical records of 77 patients (101 surgeries) receiving 3.0 slotplates were reviewed. Plate infection and plate removal rates were low in the 3.0 slotplate group (2.6% (p = 0.123) and 3.9% (p = 0.103), respectively). No delayed union or non-union occurred in the 3.0 slotplate group. Comparing the morbidity rates with the 2.0 slotplate cohort did not yield any significant differences. Although there was a tendency towards better outcomes with 3.0 slotplates compared to the 2.0 slotplates, the outcome differences did not reach statistical significance.
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Affiliation(s)
- Brandaan G R Zigterman
- European Face Centre (Chair: Prof. Maurice Y. Mommaerts), Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Belgium.
| | - Stijn E F Huys
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, Leuven, Belgium; R&D Officer, CADskills BVBA, Gent, Belgium
| | - Maurice Y Mommaerts
- European Face Centre (Chair: Prof. Maurice Y. Mommaerts), Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Belgium
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Lartizien R, Zaccaria I, Savoldelli C, Noyelles L, Chamorey E, Cracowski JL, Bettega G. Learning condyle repositioning during orthognathic surgery with a surgical navigation system. Int J Oral Maxillofac Surg 2019; 48:952-956. [PMID: 30755359 DOI: 10.1016/j.ijom.2019.01.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/18/2018] [Accepted: 01/26/2019] [Indexed: 10/27/2022]
Abstract
Condyle repositioning during bilateral sagittal splint osteotomy (BSSO) is a challenging step for the inexperienced surgeon. We aimed to demonstrate the benefit of navigation for learning the condyle repositioning. We treated 100 patients who underwent a BSSO. A trainee performed the condyle repositioning of one side in two phases. In the first one, the trainee positioned without watching the screen of the Orthopilot Navigation system (ONS). In the second one, the trainee could use the ONS to replace the condyle. Heuristic, anatomical and functional scores of each phase were recorded. Heuristic (17% vs. 75%; p<0.0001), anatomical (35% vs. 86%; p<0.0001) and functional (14% vs. 56%; p<0.0001) scores were significantly greater with the ONS. The ONS is a promising and original intraoperative learning tool for the repositioning of the condyle during BSSO.
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Affiliation(s)
- R Lartizien
- Maxillofacial Surgery Department, Annecy Genevois Hospital, 1 Avenue de l'Hôpital, 74370 Epagny Metz-Tessy, France; Université Grenoble Alpes, Medical Faculty, 23 Avenue Maquis du Grésivaudan, 38700 La Tronche, France; Maxillofacial and Plastic Surgery Department, University Hospital of Grenoble, Avenue Maquis-du-Grésivaudan, 38700 La Tronche, France.
| | - I Zaccaria
- Clinical Research Department, Annecy Genevois Hospital, 1 Avenue de l'Hôpital, 74370 Epagny Metz-Tessy, France
| | - C Savoldelli
- Oral and Maxillofacial Surgery, Head and Neck Institute, University Hospital of Nice, Nice, France
| | - L Noyelles
- Maxillofacial Surgery Department, Annecy Genevois Hospital, 1 Avenue de l'Hôpital, 74370 Epagny Metz-Tessy, France
| | - E Chamorey
- Epidemiology and Biostatistics Unit, Antoine Lacassagne Center, Nice, France
| | - J L Cracowski
- Université Grenoble Alpes, Medical Faculty, 23 Avenue Maquis du Grésivaudan, 38700 La Tronche, France; Clinical Pharmacology Unit, INSERM CIC1406, CHU Grenoble-Alpes, F-38000 Grenoble, France
| | - G Bettega
- Maxillofacial Surgery Department, Annecy Genevois Hospital, 1 Avenue de l'Hôpital, 74370 Epagny Metz-Tessy, France
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