Ali Alkhayer | University of Szeged (original) (raw)

Papers by Ali Alkhayer

Introduction: It is common nowadays that respiratory functions are highly relevant to the orthodo... more Introduction: It is common nowadays that respiratory functions are highly relevant to the orthodontic diagnosis and the treatment plan, besides their effects on the stability of the treatment results. So it is important to have a better and more deeply analysis of the upper airway morphology in our patients, especially, in class II patients where the upper airway could be affected by the pressures against the dentition, dental arch form, and the possibly direction of mandibular and maxillary growth. Objective: The aim of this study was to evaluate the size and areas of the upper airways in adults with skeletal Class II malocclusion, using three dimensional computed tomography (3DCT) and to compare the cross-sectional measurements and cephalometric variables with skeletal class I group, to investigate possible relationships between the upper airway and anteroposterior growth type. Materials and methods: Our Sample's consisted of 36 adults (15males, 21 females) who were selected f...

Additional file 1: Table S1. Virtual planning accuracy of the included studies.

Head & Face Medicine

Background The elaboration of a precise pre-surgical plan is essential during surgical treatment ... more Background The elaboration of a precise pre-surgical plan is essential during surgical treatment of dentofacial deformities. The aim of this study was to evaluate the accuracy of computer-aided simulation compared with the actual surgical outcome, following orthognathic surgery reported in clinical trials. Methods Our search was performed in PubMed, EMBASE, Cochrane Library and SciELO for articles published in the last decade. A total of 392 articles identified were assessed independently and in a blinded manner using eligibility criteria, out of which only twelve articles were selected for inclusion in our research. Data were presented using intra-class correlation coefficient, and linear and angular differences in three planes. Results The comparison of the accuracy analyses of the examined method has shown an average translation (

International Journal of Environmental Research and Public Health

Facial soft tissue esthetics is a priority in orthodontic treatment, and emerging of the digital ... more Facial soft tissue esthetics is a priority in orthodontic treatment, and emerging of the digital technologies can offer new methods to help the orthodontist toward an esthetic outcome. This prospective study aimed to assess the soft tissue changes of the face after six months of retention following Rapid Maxillary Expansion (RME). The sample consisted of 25 patients (13 females, 12 males, mean age: 11.6 years) who presented with unilateral or bilateral posterior crossbite requiring RME, which was performed with a Hyrax expander. 3D facial images were obtained before treatment (T0) and at the end of a six-month retention period after the treatment (T1) using a structured-light 3D handheld scanner. Linear and angular measurements were performed and 3D deviation analyses were done for six morphological regions of the face. Significant changes in various areas of the nasal and the upper lip regions were observed. Based on the results of the study and within the limitations of the study,...

Fogorvosi Szemle

Az ortognath műtétek tervezésénél a lágyrészek adaptációjának és kontúrjainak figyelembe vétele k... more Az ortognath műtétek tervezésénél a lágyrészek adaptációjának és kontúrjainak figyelembe vétele kiemelt fontosságú.Prospektív tanulmányunk célja a skeletalis III. osztályú páciensek bimaxilláris műtétje után, az arc különböző morfológiairégióiban bekövetkezett lágyrész-változások átfogó értékelésének elvégzése kézi háromdimenziós strukturált fényszkennerrel.Vizsgálati mintánk 12 olyan páciensből állt (6 férfi és 6 nő, átlagéletkoruk 22 ± 2,17 év), akiknek a skeletalisIII. osztályú eltérése átfogó kezelésük második lépéseként bimaxilláris osteotomiát igényelt. Háromdimenziós arcképeketkészítettünk egy héttel a műtét előtt (T0) és 6 hónappal a műtét után (T1) kézi 3D strukturált fényszkennerrel. A képekenlineáris és szögméréseket végeztünk és hasonlítottunk össze, illetve elkészítettük az arc 7 morfológiai régiójánakháromdimenziós deviációs elemzését. Statisztikailag szignifikáns növekedést találtunk az orr- és az orralap szélességében,az orrcsúcs szögében, a felső ajak magasságában é...

Three-dimensional changes of the facial soft tissue after bimaxillary surgery of skeletal class I... more Three-dimensional changes of the facial soft tissue after bimaxillary surgery of skeletal class III patients: a prospective study. Award: III Prize  poster presentation in a congress (international): 96 List of Abbreviations CBCT/ CT Cone beam/ computed tomography CFAs Craniofacial anomalies OMSs Oral and maxillofacial surgeons AAOMS Association of oral and maxillofacial surgeons MCA Multiple congenital abnormalities CL/P Cleft lip and palate CO Central occlusion CR Central relation RME Rapid maxillary expansion 2D Two-dimensional 3D Three-dimensional 4D Four-dimensional MRI Magnetic resonance imaging TMJ Temporomandibular joint CMM Coordinate measurement machines LED Light emitting diode STL Stereolithography ICC Interclass correlation coefficient ADRL Average distances between the reciprocal landmarks BSSRO Bilateral sagittal split ramus osteotomy MSS Mandibular setback surgery 1.3 Skeletal and dental consideration in the transverse dimension Maxillary transverse deficiency may be one of the most pervasive skeletal problems in the craniofacial region (7). The transverse dimension is often interrelated with the sagittal and vertical dimensions. However, the transverse dimension relates primarily to the posterior occlusion, and any discrepancy is usually manifest as a unilateral or bilateral crossbite of the buccal occlusion. 1.4 Surgical correction of the craniofacial deformities: According to the American Association of Oral and Maxillofacial Surgeons (AAOMS), orthognathic surgery is the surgical correction of abnormalities of the mandible, maxilla, or both. The underlying abnormality may be present at birth or may become evident as the patient grows 1.5.2 Importance of the facial soft tissue in surgical treatment The focus on soft tissue has also emphasized the growing importance of the aesthetic outcomes of surgery, particularly during orthognathic surgery planning (23), because it has the objective of correcting skeletal discrepancies, as well as altering facial balance (24), In these respects, It is important to understand the relationship between the movement of the facial soft tissue envelope 1.6.2.2 Intraoral Scanning With the introduction of the intraoral scanning technique, disadvantages of conventional impression techniques such as dimensional changes of impression materials, storage problems, and dental cast errors are overcome. Also, it is easier to take impressions from patients with gag reflexes (32). The development of digital models allows to obtain 3D diagnostic information,

Alkhayer et al. ALbaath University Journal.38(3).).165-191, 2016

This study aimed to investigate the relationship of the size and areas of the upper airway with t... more This study aimed to investigate the relationship of the size and areas of the upper airway with the Facial growth type in adults ,and to investigate the differences in upper airway measurements between males and females using sagittal and axial slices of three dimensional computed tomography. Materials and methods: Our Sample's consisted of 46 adults (21 males,25 females)who didn't have any previous orthodontic treatment .We performed a cephalometric analysis according to Jarabak analysis to determine the facial growth type, then we calculated Pearson's Correlation to investigate the relationship between the upper airway measurements and the Cephalometric measurements determining facial growth type. We noticed that No statically significant relationship between the morphology of the nasopharyngeal , oropharyngeal airways and facial growth type in non-orthodontically treated adults of Syrian coast with no clinical symptoms of the upper airway disorders (p >0.05).

Alkhayer et al.Tishreen University Journal for Research and Scientific Studies 38(2):2016, 2016

Introduction : The respiratory functions have wide effects on the orthodontic diagnosis and the t... more Introduction : The respiratory functions have wide effects on the orthodontic diagnosis and the treatment planning, besides their effects on the stability of the treatment results. So it is important to have a better and more deeply analysis of the upper airway morphology, and to evaluate its relationship with the cephalometric features that determine the intermaxillary relationship. Objective: The aim of this study was to evaluate the relationship of the size and areas of the upper airways in adults to the sagittal intermaxillary relationship using sagittal and axial slices of three dimensional computed tomography. Materials and methods: The Sample's consisted of 29 adults (12males,17 females) selected from patients who were ordinary undergoing 3DCT for non-orthodontic nor otolaryngology purposes and didn't have orthodontic treatment. the anteroposterior positions of both the maxilla and the mandible were evaluated with the ANB angle , AF-BF distance and Wits appraisal .Then Pearson's Correlation was calculated to investigate the possible relationship between the upper airway measurements and the Cephalometric measurements determining intermaxillary relationship at the sagittal plane. Results: We found statistically significant correlation between the upper airway measurements and the cephalometric measurements determining sagittal intermaxillary relationship. The depth and area of NA showed negative correlation with ANB ,WITS,AF-BF (p＜0.05). We noticed that females have statistically significant smaller oropharyngeal depth than males. Conclusions: There is a statistically significant correlation between the upper airway measurements and the cephalometric measurements determining the sagittal intermaxillary relationship in adults with no clinical symptoms of the upper airway disorders..

Alkhayer et al; Int. J. Environ. Res. Public Health 2021, 18, 3379 , 2021

Alkhayer et al. Head & Face Medicine, (2020) 16:34, 2020

Background: The elaboration of a precise pre-surgical plan is essential during surgical treatmen... more Background:
The elaboration of a precise pre-surgical plan is essential during surgical treatment of dentofacial deformities. The aim of this study was to evaluate the accuracy of computer-aided simulation compared with the actual surgical outcome, following orthognathic surgery reported in clinical trials. Methods: Our search was performed in PubMed, EMBASE, Cochrane Library and SciELO for articles published in the last decade.
A total of 392 articles identified were assessed independently and in a blinded manner using eligibility criteria, out of which only twelve articles were selected for inclusion in our research. Data were presented using intra-class correlation coefficient, and linear and angular differences in three planes.
Results:
The comparison of the accuracy analyses of the examined method has shown an average translation (< 2 mm) in the maxilla and also in the mandible (in three planes). The accuracy values for pitch, yaw, and roll (°) were (< 2.75, < 1.7 and < 1.1) for the maxilla, respectively, and (< 2.75, < 1.8, < 1.1) for the mandible. Cone-beam computed tomography (CBCT) with intra-oral scans of the dental casts is the most used imaging protocols for virtual orthognathic planning. Furthermore, calculation of the linear and angular differences between the virtual plan and postoperative outcomes was the most frequented method used for accuracy assessment (10 out of 12 studies) and a difference less than 2 mm/°was considered acceptable and accurate. When comparing this technique with the classical planning, virtual planning appears to be more accurate, especially in terms of frontal symmetry.
Conclusion:
Virtual planning seems to be an accurate and reproducible method for orthognathic treatment planning. However, more clinical trials are needed to clearly determine the accuracy and validation of the virtual planning in orthognathic surgery.