Abdullah Ozel | Istanbul Medipol University (original) (raw)

Papers by Abdullah Ozel

Selcuk dental journal, Apr 27, 2023

Purpose: The aim of this study was to determine how the mentolabial groove at the frontal view is... more Purpose: The aim of this study was to determine how the mentolabial groove at the frontal view is affected by orthognathic surgery. Materials & Methods: Sixty-two patients were appointed into two groups (Group 1: Class II skeletal deformity, Group 2: Class III skeletal deformity). In each patient, pre and postoperative standardized sixth-month photos (lateral and frontal view) were obtained in natural head position to investigate mentolabial groove length (MGL), mentolabial groove depth (MGD), mentolabial groove angle (MGA) and mentolabial angle (MLA). Results: Out of the 62 patients, 41 had Class III skeletal deformity (66.2%) and 21 Class II skeletal deformity (33.8%). In Group 1, the average ratio of MGL decreased significantly from 0.59±0.14 to 0.45±0.09 (p<0.001). Contrary to Group 1, the ratio of MGL increased significantly from 0.41±0.11 to 0.50±0.13 in Group 2 (p=0.001). There was a negative correlation between MGA and MGL (p=0.001, r=-0.439). MGD positively correlated with MGL (p<0.001, r=0.499). Conclusion: After orthognathic surgery, the mentolabial groove decreases in class II patients and increases in class III patients. Orthognathic surgery significantly affects mentolabial anatomy and therefore should be planned carefully to obtain an aesthetic appearance in the mentolabial region.

APOS Trends in Orthodontics

Objectives: The hard and soft tissues of the head and neck, dentition, and temporomandibular join... more Objectives: The hard and soft tissues of the head and neck, dentition, and temporomandibular joint are the determining elements in orthognathic surgery planning. The accuracy and precision of the relationship between the jaws at the beginning of treatment and their final position depend on an accurate dentition record. The aim of this study was to determine the simplest and most feasible virtual dental model transfer method for three-dimensional orthognathic planning according to clinical applicability, technical difficulty, effective costs, accuracy, and precision. Material and Methods: A total of ten spherical porcelain markers were placed in plaster models of the maxilla and mandible of a patient. The models were scanned using an intraoral optical scanner, an extraoral digital model scanner, and cone-beam computerized tomography. To evaluate reliability, each measurement was repeated 10 times at 1-week intervals and the distances between points were measured horizontally and vert...

International Journal of Oral and Maxillofacial Surgery, 2020

The 'beauty arch', an aesthetic feature of the midface, is a doubleS shaped curve that extends do... more The 'beauty arch', an aesthetic feature of the midface, is a doubleS shaped curve that extends downward from the lateral canthus. This retrospective study evaluated whether modified high Le Fort I advancement (combined with impaction or down-grafting) without malar augmentation can approximate a patient's 'ideal' beauty arch (IBA). Pre-and postoperative profile (natural head position) photographs for 36 patients with midfacial hypoplasia were aligned digitally. For each individual, standardized methods were used to identify landmarks and draw the preoperative real beauty arch (RBA), postoperative RBA, and IBA. Distances from a defined landmark to each arch were measured and means were compared. The mean advancement range was 4.2 AE 2.2 mm, and the mean pre-and postoperative RBA distances were significantly different (138.7 AE 24.1 vs 145.0 AE 25.8 pixels, respectively; P = 0.0001). In the impaction and down-grafting subgroups, there was no significant correlation between amount of maxillary movement and the difference between pre-and postoperative RBA distances (P > 0.05 for both). The postoperative RBA was satisfactorily close to the IBA in 35 cases (97.2%); one patient required later augmentation. The findings suggest that modified high Le Fort I advancement surgery without malar augmentation provides satisfactory malar projection for most patients with maxillary hypoplasia.

Research Square (Research Square), Jul 28, 2023

The aim of this study was to evaluate the sensory function of the infraorbital nerve after orthog... more The aim of this study was to evaluate the sensory function of the infraorbital nerve after orthognathic surgery (OS). Materials and methods Patients who underwent Le Fort I osteotomy with or without BSSO for dentofacial deformity treatment were studied. Two groups were created according to whether BSSO was performed. Class A tests were performed to determine the degree of peripheral nerve damage. The Class B test was performed if decreased sensation was detected in at least one of these tests. A Class C test was performed if abnormal sensation was detected. Results Twenty-eight patients (n = 56) who underwent OS were included in this prospective study. Of the patients, 57.1% were female, 42.9% were male, and the mean age was 24.6 (± 3.8). Seven patients were in group 1 (n = 14), and 21 patients were in group 2 (n = 42). In both groups, there were statistically signi cant differences between T1 and T2 (p < 0.001), and the mean NSD score at T2 was higher than that at T1. The mean NSD score in the single jaw group was higher than that in the double jaw group at all time points. Conclusions Bimaxillary surgeries had a negative effect on the somatosensory changes that developed in the early period. The upper lip's somatosensorial recovery was faster than IOR and single jaw recovery was faster than double jaw. Clinical relevance: Maxillofacial surgeons performing orthognathic surgery should be aware that in double jaw operations, changes in the somatosensory function of the ION are more severe.

Journal of Craniofacial Surgery

British Journal of Oral and Maxillofacial Surgery, 2016

Syngnathia is a rare congenital fusion of the hard and soft issues of the jaw. Early intervention... more Syngnathia is a rare congenital fusion of the hard and soft issues of the jaw. Early intervention after birth is essential ecause without it the baby cannot feed, and facial growth nd function will be severely affected.1 A 3-day-old baby boy was referred to the oral and maxilloacial surgery clinic from a peripheral hospital. He presented ith his upper and lower gums completely attached and so ad to be fed through a nasogastric tube. His history showed hat his parents were related by blood, but there was no vidence of syngnathia, systemic disease, trauma, or drug reatment other than routine drugs and analgesics (for examle, paracetamol) during pregnancy. He was referred to the paediatric newborn intensive care linic for further evaluation, but there were no genetic, conenital, or systemic problems. His chin was deviated to the eft, and he had retrusion of the mandible. Intraorally the eft side of his maxilla and mandible were fused at gum level Fig. 1), but there was no cleft palate and no syndrome apparnt. We classified the deformity as a Type 2a according to the aster classification,2 and noted that he was malnourished nd had a low body weight. His left ascending ramus and he alveolar process of his mandible were fused to the upper

Journal of Cranio-Maxillofacial Surgery, 2021

This study aimed at evaluating changes in scleral show following Le Fort I osteotomy with either ... more This study aimed at evaluating changes in scleral show following Le Fort I osteotomy with either impaction or lengthening of the mid face. Patients who underwent Le Fort I osteotomy were included. The patients were divided according to the direction of the movement: group 1 underwent maxillary advancement and impaction, while group 2 underwent maxillary advancement and lengthening. Standardized preoperative and 6-month postoperative photos were superimposed using Microsoft PowerPoint. The inferior visible scleral area was assessed with landmarks and measured separately using ImageJ software. Marked scleral surface area was determined using pixel count. A total of 36 consecutive patients were included. The mean maxillary advancement in the patients was 4.16 ± 2.14 mm. The mean impaction in group 1 (n= 21) was 1.06 ± 1.49 mm, while the mean vertical lengthening in group 2 (n = 15) was 1.54 ± 1.65 mm. The difference in improvement in the inferior scleral show between the groups was not statistically significant. Preoperative (180 ± 118.2 mm) and postoperative (147.75 ± 92.2 mm) scleral show significantly improved (p = 0.012) in both groups. Scleral show can be overlooked for movements under 6 mm while planning for maxillary orthognathic movement, as it improves regardless of the desired movement.

Journal of Craniofacial Surgery, 2021

Supplemental Digital Content is available in the text Horizontal osteotomy is one of the most cri... more Supplemental Digital Content is available in the text Horizontal osteotomy is one of the most critical step at sagittal split ramus osteotomy (SSRO) and determination of the ideal height of this horizontal osteotomy is essential to avoid nerve and vessel injury. Purpose: The aim of this study was to evaluate the level of the medial horizontal ramus cut as a risk factor for unfavorable outcomes in the SSRO. Materials and Methods: Sixty-four patients with dentofacial deformity who applied to Oral & Maxillofacial Surgery Department between August 2018 and August 2019 and undergone orthognathic surgery were evaluated. Out of 64, 49 patients had SSRO with or without maxillary surgery and genioplasty. Twenty-six patient had postoperative computed tomography scan with 6-months follow-up. Finally, 26 patient with 52 SSRO sides were included in this study. Computed tomography scans were evaluated and classification according to osteotomy levels was made. Postoperative neurosensory deficit, b...

Yeditepe Dental Journal

Alveol kret yetersizliğinin extraoral otojen onley kemik greftleri ile ogmentasyonda tünel ve kre... more Alveol kret yetersizliğinin extraoral otojen onley kemik greftleri ile ogmentasyonda tünel ve krestal isizyon tekniklerinin karşılaştırılması Comparison of tunnel and crestal incision techniques in alveolar cret deficiency using extraoral autogeneous onley bone grafts ÖZET Amaç: Bu çalışmanın amacı alveoler kret yetersizliğinde krestal ve tünel olmak üzere 2 farklı insizyon tekniği kullanılarak ekstraoral donör sahadan alınan otojen kemik greftin yerleştirilmesinden sonra meydana gelen alıcı bölgedeki komplikasyonların karşılaştırılması ve değerlendirilmesidir. Gereç ve Yöntem: Bu çalışmada 13 hastadaki iliak greft ile ogmente edilen 14 krestal, 27 tünel yöntemi olmak üzere 41 bölgedeki minör (greftte minör açılma, vida başının açılması, sütur açılması, geçici parestezi, ılımlı ve/veya orta şiddette enfeksiyon) ve majör (greft kaybına neden olan enfeksiyon, majör açıklık, kalıcı parestezi) komplikasyonlar retrospektif olarak değerlendirilmiş ve iki farklı insizyon tekniği karşılaştırılmıştır. Ayrıca donör saha morbiditeleri değerlendirilmiştir. Bulgular: Tünel insizyon tekniği kullanılan grupta minor komplikasyon oranı %29.6 iken majör komplikasyon görülmemiştir. Krestal insizyon yapılan grupta % 50 minör komplikasyon ve %28.6 majör komplikasyon görülmüştür. İki farklı insizyon tekniği kullanılan gruplar arasında minör ve majör komplikasyon oranlarında istatistiksel olarak anlamlı fark bulunmuştur. İlaveten krestal teknikte ogmente edilen bölge sayısı ile minör komplikasyon oluşma riski insidansı arasında anlamlı ters korelasyon görülmüştür. Sonuç: Ekstraoral otojen greftlerde subperiosteal tünel yaklaşımı krestal yaklaşıma göre alıcı saha komplikasyon oranı dikkate alındığında daha başarılı ve alternatif bir yöntem olabilir. Anahtar kelimeler: Atrofik çene, ekstraoral onley kemik grefti, tünel insizyon tekniği SUMMARY Aim: The aim of this study was to compare and evaluate two techniques', crestal and tunnel incision, complications after extraoral autogenous bone grafting at recipient area, which are used to treat alveol crest insufficiency. Materials and Method: Minor complications (minor openning in graft, opening of screw head, suture opening, temporary paresthesia, mild/moderate infection) and major complications (Infection causing graft loss, major opening, permanent paresthesia) of 41 graft sites (14 crestal and 27 tunnel methods) which were augmented with iliac graft in 13 patients are evaluated and compared with two different techniques retrospectively. Furthermore, donor area morbidities were evaluated. Results: While minor complication rate in the group where tunnel incision technique used is 29.6%, major complication is not encountered. In the crestal incision group, 50% minor complication and 28.6% major complication are encountered. Minor and major complication rates among groups were statistically significant. In addition, significant negative correlation was found between the number of region which is augmented with crestal technique and incidence risk that leads minor complication. Conclusion: When considered recipient graft site complication rate, subperiosteal tunnel approach was found more suc-ÖZGÜN ARAŞTIRMA

Please cite this article in press as: Özel A, et al. Unilateral complex syngnathia of the maxilla... more Please cite this article in press as: Özel A, et al. Unilateral complex syngnathia of the maxilla, mandible, and zygomatic complex in a newborn baby. Br J Oral Maxillofac Surg (2016), http://dx. Unilateral complex syngnathia of the maxilla, mandible, and zygomatic complex in a newborn baby Syngnathia is a rare congenital fusion of the hard and soft tissues of the jaw. Early intervention after birth is essential because without it the baby cannot feed, and facial growth and function will be severely affected. 1 A 3-day-old baby boy was referred to the oral and maxillo-facial surgery clinic from a peripheral hospital. He presented with his upper and lower gums completely attached and so had to be fed through a nasogastric tube. His history showed that his parents were related by blood, but there was no evidence of syngnathia, systemic disease, trauma, or drug treatment other than routine drugs and analgesics (for example , paracetamol) during pregnancy. He was referred to the paediatric newborn intensive care clinic for further evaluation, but there were no genetic, congenital , or systemic problems. His chin was deviated to the left, and he had retrusion of the mandible. Intraorally the left side of his maxilla and mandible were fused at gum level (Fig. 1), but there was no cleft palate and no syndrome apparent. We classified the deformity as a Type 2a according to the Laster classification, 2 and noted that he was malnourished and had a low body weight. His left ascending ramus and the alveolar process of his mandible were fused to the upper alveolar process and zygomatic complex. Maxillofacial computed tomography showed a zygomaticomaxillary fusion of the left side (Fig. 2), and the right temporomandibular joint Fig. 1. Preoperative intraoral view of the patient. Maxillary and mandibular arches were fused and feeding was only possible through a nasogastric tube. Intraoperative intraoral view after the removal of the attached bony and soft tissues. Fig. 2. Zygomaticomaxillary and mandibular bony fusion marked by arrows. (TMJ) space was clear without any bony fusion. We decided to keep him in hospital until after the operation. We operated under general anaesthesia when he was 25-days-old, used local anaesthesia (2% lidocaine 0.5 ml with 1/200 000 adrenaline) intravenously into the buccal sulcus of the affected tissue, and made an intraoral incision 15 mm long into the posterior buccal region. We raised a mucope-riosteal flap and excised the bone with a sagittal saw, and used tiny osteotomes between the alveolar processes, mandibular ramus, and zygomaticomaxillary complex. Separation of the bony segments had to be gentle and well-controlled, using minimal force because of his small size and slight build. We achieved a mouth opening of 22 mm (Fig. 1). Different materials including silicone sheets, blocks, and sterile gauze packs are usually inserted between the bony segments during operation, but they failed in this instance because of occlusal pressure and instability. 3 Instead we planned to maintain the opening afterwards with continuous function. We closed the mandibular and maxillary bony segments using the raised mucoperiosteal flaps and 4/0 polyglactin 910 (Vicryl, Ethicon) sutures. His parents were