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Papers by Nashwan Al-Tairi

Journal of Oral and Maxillofacial Surgery, 2019

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires

Tanta Dental Journal, Jun 1, 2015

Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for ... more Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for the stability of unfavorable mandibular angle fractures. Patients and methods Sixteen adult patients with unfavorable mandibular angle fracture; were selected from the Outpatient Clinic, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Tanta University. The patients were divided into two equal groups, group I was treated by 3D miniplate while group II was treated by two miniplates fixation technique. Postoperative clinical evaluation included presence of infection, position of the mandibular lower border, bony union, state of occlusion, maximal mouth opening, sensory nerve function, condition of teeth related to the fracture line and; patient's tolerance to the plate. In radiographic follow up, adequate reduction, status of teeth related to the fracture line and hardware condition were observed. Also, quantitative measurements were performed to assess bone density at the fracture site and inter-ramus distance. Results Wound healing was optimal in all cases of both groups except case No 4 of group II where dehiscence and mild infection happened. Satisfactory occlusion was obtained in all cases of both groups except case No 4 of group II where it had mild occlusal derangement. Other parameters including maximal mouth opening, sensory nerve function, and patient's tolerance to the plate were comparable. There were no significant differences between group I and group II regarding bone density and inter-ramus distance. Conclusion Three-dimensional plate osteosynthesis was comparable to double-miniplate osteosynthesis in fixation of unfavorable mandibular angle fractures. Both systems provided enough stability for proper bone healing, establishment of optimal occlusion, and early return to normal function.

The Journal of Contemporary Dental Practice

Aim: The aim of this study was to determine the lateral pterygoid muscle (LPM) in relation to pre... more Aim: The aim of this study was to determine the lateral pterygoid muscle (LPM) in relation to preauricular skin measured from computed tomography (CT) scan measurements. Materials and methods: CT scans of 160 patients aged between 18 and 75 years were retrospectively collected and analyzed, and the distances were measured to determine the location of the LPM center in relation to the preauricular skin. On axial CT crossing the maximum muscle width, two lines [the first line is below the center of the zygomatic arch (first position), while the second line was 5 mm posterior to the first one (second position)] were drawn from the preauricular skin to the medial border and then extended to the lateral border of the muscle. These measurements were used to calculate the distance to the center of the muscle mathematically. Data were statistically analyzed, and the differences between both genders and both sides were investigated. The level of significance was set at p-value <0.05. Results: Males displayed larger mean values in two positions (36.6 ± 2.25 and 35.97 ± 4.19, respectively) than females (33.66 ± 4.46 and 32.80 ± 3.21, respectively). The difference between both genders was found to be statistically significant. Measurements on the right side were also larger than those on the left side, but with no significant difference. Conclusion: LPM center can be approached safely in males by inserting the needle about 36 mm at the first position and 33 mm at the second position. However, in females, these distances are located 3 mm shorter in both positions. Clinical significance: The outcome of this study will provide the clinicians with measurements that can help in directing the needle or electromyography (EMG) electrode during the extraoral injection technique of the LPM.

International Journal of Oral and Maxillofacial Surgery, 2019

Do osteoconductive bone substitutes result in similar bone regeneration for maxillary sinus augme... more Do osteoconductive bone substitutes result in similar bone regeneration for maxillary sinus augmentation when compared to osteogenic and osteoinductive bone grafts? A systematic review and frequentist network meta-analysis.

Journal of Cranio-Maxillofacial Surgery, 2018

Evidence on the best surgical approach with the lowest lower lid complications (LLCs) in the trea... more Evidence on the best surgical approach with the lowest lower lid complications (LLCs) in the treatment of orbital floor (OF) and periorbital fractures (POFs) is limited because of the absence of head-to-head studies. We performed this network meta-analysis (NMA) to compare various surgical approaches in treatment of OFs and POFs, with respect to LLCs. Materials and Methods: This NMA based on PRIMSA guidelines studied the incidence of the LLCs attending various surgical approaches in the treatment of the OFs and POFs. We searched several databases from 1970 to March 28, 2018. All clinical studies comparing different surgical approaches in treatment of OFs and POFs were included. Outcome variables were ectropion, entropion, scleral show and other complications. Predictor variables were transconjunctival approach (TCA), subciliary approach (SCA), subtarsal (STA) and infraorbital approach (IOA). Frequentist NMA was performed using STATA software. Results: A total of 47 studies with 5267 cases of the OFs and POFs received ORIF using 4 th surgical approaches with 6 th comparisons were included. TCA significantly reduces the prevalence of ectropion than SCA (OR=3.54, CI1.28-9.84), but no significant difference was found between TCA and, STA or TCA and IOA. SCA and STA significantly reduce the prevalence of entropion than TCA (OR = 0.21, CI, 0.08-0.58, or = 0.14, CI, 0.03-0.63 respectively). We found no significant difference between the 6 th comparisons with respect to other complications. intention to identify the best surgical appaorach in the treatment of OFs and POFs with respect to LLCs. We hypothesized that there would be no difference between TCA , SCA, STA, and IOA when used in the treatment of OFs and POFs with respect to entropion, extropion, scleral show and other complications. The specific aim was to assess the comparative effectiveness of various surgical approaches used in the management of OFs and POFs, namely TCT, SCA, STA and IOA.

Journal of Oral and Maxillofacial Surgery, 2018

The most effective rehabilitation method for patients with edentulous posterior maxillas with an ... more The most effective rehabilitation method for patients with edentulous posterior maxillas with an intermediate (4 to 8 mm) residual bone height (RBH) below the maxillary sinus is unclear. Evidence derived from conventional meta-analysis is limited because of the lack of head-to-head studies. This network meta-analysis (NMA) was performed to identify the most effective method to treat patients with intermediate posterior RBH. Materials and Methods: An NMA of randomized controlled clinical trials (RCTs) was conducted to assess various rehabilitation methods using implant-supported prostheses for patients with intermediate posterior maxillary RBH (4 to 8 mm). Publications from 1970 through March 2018 in 3 major databases were searched. Parallel and split-mouth RCTs that reported the outcomes of interest with follow-up of at least 6 months from initial loading were included. Predictor variables were short implants (SIs; #8 mm) alone, SIs in conjunction with osteotome sinus floor elevation (OSFE) with or without bone grafting, long implants (LIs) in conjunction with OSFE with and without bone grafting, and LIs combined with lateral sinus floor elevation (LSFE) with bone grafting. Outcome variables were implant and prosthesis failure rates, marginal bone loss, and complications. Frequentist NMA was performed using STATA software. Results: Twenty RCTs involving 770 patients with intermediate posterior maxillary RBH and 837 concerned maxillary sinuses who received 1,486 implants using any of the 4 rehabilitation methods were included. There were no statistically significant differences among the 4 groups for implant and prosthesis failure rates and marginal bone loss at follow-up (range, 6 months to 5 years after loading). There was a

Journal of Cranio-Maxillofacial Surgery, 2017

Among the different surgical treatments for keratocystic odontogenic tumors (KOTs), there is no s... more Among the different surgical treatments for keratocystic odontogenic tumors (KOTs), there is no single method associated with a zero recurrence rate (RR). Thus, this study aimed to seek the best surgical treatment with the least RR using a weighted event rated meta-analysis. To address our study purpose, a systematic review and meta-analysis based on the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guideline was performed. An extensive search of major databases through PubMed, EMBASE, and Cochrane CENTRAL was conducted to identify all relevant articles published without language restrictions from inception to August 2016. Relevant articles were selected based on the following inclusion criteria: prospective, retrospective, and case series studies that assessed various treatments in non-syndromic KOTs in which RRs were included. The predictor variable was treatment groups, namely: enucleation alone, enucleation with peripheral ostectomy, enucleation with Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution application, enucleation with cryotherapy, marsupialization alone, decompression followed by residual cystectomy, and resection. The outcome variable was RR. A weighted RR using a random effect model (because of variation in follow-up time) with a 95% confidence interval (CI) was performed. Data analysis was performed using a comprehensive meta-analysis software. A total of 2287 KOTs in 35 studies were included in this analysis. The weighted RR for various treatment techniques was as follows: enucleation alone (23.1%), enucleation with curettage (17.4%), enucleation and Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution (11.5%), enucleation plus liquid nitrogen cryotherapy (14.5%), marsupialization alone (32.3%), decompression followed by residual cystectomy (14.6%), and resection (8.4%). The pooled weighted overall RR of KOTs for all different treatments was 16.6%. Radical resection remains the certain option for obtaining the lowest recurrence with KOTs. However, low recurrence accompanies enucleation with application of Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution or cryotherapy as the first-line treatment for primary KOTs. Marsupialization (where indicated) must be followed by secondary cystectomy to minimize recurrence. We believe that to achieve the least possible morbidity, resections should be reserved for multiple recurrent lesions and possibly syndromic cases.

Tanta Dental Journal, 2015

Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for ... more Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for the stability of unfavorable mandibular angle fractures. Patients and methods Sixteen adult patients with unfavorable mandibular angle fracture; were selected from the Outpatient Clinic, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Tanta University. The patients were divided into two equal groups, group I was treated by 3D miniplate while group II was treated by two miniplates fixation technique. Postoperative clinical evaluation included presence of infection, position of the mandibular lower border, bony union, state of occlusion, maximal mouth opening, sensory nerve function, condition of teeth related to the fracture line and; patient's tolerance to the plate. In radiographic follow up, adequate reduction, status of teeth related to the fracture line and hardware condition were observed. Also, quantitative measurements were performed to assess bone density at the fracture site and inter-ramus distance. Results Wound healing was optimal in all cases of both groups except case No 4 of group II where dehiscence and mild infection happened. Satisfactory occlusion was obtained in all cases of both groups except case No 4 of group II where it had mild occlusal derangement. Other parameters including maximal mouth opening, sensory nerve function, and patient's tolerance to the plate were comparable. There were no significant differences between group I and group II regarding bone density and inter-ramus distance. Conclusion Three-dimensional plate osteosynthesis was comparable to double-miniplate osteosynthesis in fixation of unfavorable mandibular angle fractures. Both systems provided enough stability for proper bone healing, establishment of optimal occlusion, and early return to normal function.

Open Journal of Stomatology

Although maxillofacial fractures are not as common in children as in adults, trauma is still the ... more Although maxillofacial fractures are not as common in children as in adults, trauma is still the leading cause of morbidity and mortality in the pediatric population worldwide. The aim of this study was to review the pattern and prevalence of pediatric maxillofacial fractures in a sample of the Yemeni population aged 18 years and below. A retrospective analysis of patient records and radiographs was conducted for the 4 year period between June 2016 and October 2020. A total of 71 patients had 87 fractures divided into three age groups, i.e., preschool group (0-6 years), primary school group (7-12 years) and teenage group (13-18 years). The male to female ratio was 2.38:1 and the highest incidence occurred in the age group 13 to 18 years. The main etiological factor was road traffic accidents (RTA), however, falls were the primary etiology in the preschool age group. We conclude that maxillofacial trauma in pediatric patients is associated mainly with RTA and fall and; the mandible is more affected than other maxillofacial structures with the condyle being the most frequently fractured mandibular site.

Journal of Oral and Maxillofacial Surgery, 2019

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires

Tanta Dental Journal, Jun 1, 2015

Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for ... more Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for the stability of unfavorable mandibular angle fractures. Patients and methods Sixteen adult patients with unfavorable mandibular angle fracture; were selected from the Outpatient Clinic, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Tanta University. The patients were divided into two equal groups, group I was treated by 3D miniplate while group II was treated by two miniplates fixation technique. Postoperative clinical evaluation included presence of infection, position of the mandibular lower border, bony union, state of occlusion, maximal mouth opening, sensory nerve function, condition of teeth related to the fracture line and; patient's tolerance to the plate. In radiographic follow up, adequate reduction, status of teeth related to the fracture line and hardware condition were observed. Also, quantitative measurements were performed to assess bone density at the fracture site and inter-ramus distance. Results Wound healing was optimal in all cases of both groups except case No 4 of group II where dehiscence and mild infection happened. Satisfactory occlusion was obtained in all cases of both groups except case No 4 of group II where it had mild occlusal derangement. Other parameters including maximal mouth opening, sensory nerve function, and patient's tolerance to the plate were comparable. There were no significant differences between group I and group II regarding bone density and inter-ramus distance. Conclusion Three-dimensional plate osteosynthesis was comparable to double-miniplate osteosynthesis in fixation of unfavorable mandibular angle fractures. Both systems provided enough stability for proper bone healing, establishment of optimal occlusion, and early return to normal function.

The Journal of Contemporary Dental Practice

Aim: The aim of this study was to determine the lateral pterygoid muscle (LPM) in relation to pre... more Aim: The aim of this study was to determine the lateral pterygoid muscle (LPM) in relation to preauricular skin measured from computed tomography (CT) scan measurements. Materials and methods: CT scans of 160 patients aged between 18 and 75 years were retrospectively collected and analyzed, and the distances were measured to determine the location of the LPM center in relation to the preauricular skin. On axial CT crossing the maximum muscle width, two lines [the first line is below the center of the zygomatic arch (first position), while the second line was 5 mm posterior to the first one (second position)] were drawn from the preauricular skin to the medial border and then extended to the lateral border of the muscle. These measurements were used to calculate the distance to the center of the muscle mathematically. Data were statistically analyzed, and the differences between both genders and both sides were investigated. The level of significance was set at p-value <0.05. Results: Males displayed larger mean values in two positions (36.6 ± 2.25 and 35.97 ± 4.19, respectively) than females (33.66 ± 4.46 and 32.80 ± 3.21, respectively). The difference between both genders was found to be statistically significant. Measurements on the right side were also larger than those on the left side, but with no significant difference. Conclusion: LPM center can be approached safely in males by inserting the needle about 36 mm at the first position and 33 mm at the second position. However, in females, these distances are located 3 mm shorter in both positions. Clinical significance: The outcome of this study will provide the clinicians with measurements that can help in directing the needle or electromyography (EMG) electrode during the extraoral injection technique of the LPM.

International Journal of Oral and Maxillofacial Surgery, 2019

Do osteoconductive bone substitutes result in similar bone regeneration for maxillary sinus augme... more Do osteoconductive bone substitutes result in similar bone regeneration for maxillary sinus augmentation when compared to osteogenic and osteoinductive bone grafts? A systematic review and frequentist network meta-analysis.

Journal of Cranio-Maxillofacial Surgery, 2018

Evidence on the best surgical approach with the lowest lower lid complications (LLCs) in the trea... more Evidence on the best surgical approach with the lowest lower lid complications (LLCs) in the treatment of orbital floor (OF) and periorbital fractures (POFs) is limited because of the absence of head-to-head studies. We performed this network meta-analysis (NMA) to compare various surgical approaches in treatment of OFs and POFs, with respect to LLCs. Materials and Methods: This NMA based on PRIMSA guidelines studied the incidence of the LLCs attending various surgical approaches in the treatment of the OFs and POFs. We searched several databases from 1970 to March 28, 2018. All clinical studies comparing different surgical approaches in treatment of OFs and POFs were included. Outcome variables were ectropion, entropion, scleral show and other complications. Predictor variables were transconjunctival approach (TCA), subciliary approach (SCA), subtarsal (STA) and infraorbital approach (IOA). Frequentist NMA was performed using STATA software. Results: A total of 47 studies with 5267 cases of the OFs and POFs received ORIF using 4 th surgical approaches with 6 th comparisons were included. TCA significantly reduces the prevalence of ectropion than SCA (OR=3.54, CI1.28-9.84), but no significant difference was found between TCA and, STA or TCA and IOA. SCA and STA significantly reduce the prevalence of entropion than TCA (OR = 0.21, CI, 0.08-0.58, or = 0.14, CI, 0.03-0.63 respectively). We found no significant difference between the 6 th comparisons with respect to other complications. intention to identify the best surgical appaorach in the treatment of OFs and POFs with respect to LLCs. We hypothesized that there would be no difference between TCA , SCA, STA, and IOA when used in the treatment of OFs and POFs with respect to entropion, extropion, scleral show and other complications. The specific aim was to assess the comparative effectiveness of various surgical approaches used in the management of OFs and POFs, namely TCT, SCA, STA and IOA.

Journal of Oral and Maxillofacial Surgery, 2018

The most effective rehabilitation method for patients with edentulous posterior maxillas with an ... more The most effective rehabilitation method for patients with edentulous posterior maxillas with an intermediate (4 to 8 mm) residual bone height (RBH) below the maxillary sinus is unclear. Evidence derived from conventional meta-analysis is limited because of the lack of head-to-head studies. This network meta-analysis (NMA) was performed to identify the most effective method to treat patients with intermediate posterior RBH. Materials and Methods: An NMA of randomized controlled clinical trials (RCTs) was conducted to assess various rehabilitation methods using implant-supported prostheses for patients with intermediate posterior maxillary RBH (4 to 8 mm). Publications from 1970 through March 2018 in 3 major databases were searched. Parallel and split-mouth RCTs that reported the outcomes of interest with follow-up of at least 6 months from initial loading were included. Predictor variables were short implants (SIs; #8 mm) alone, SIs in conjunction with osteotome sinus floor elevation (OSFE) with or without bone grafting, long implants (LIs) in conjunction with OSFE with and without bone grafting, and LIs combined with lateral sinus floor elevation (LSFE) with bone grafting. Outcome variables were implant and prosthesis failure rates, marginal bone loss, and complications. Frequentist NMA was performed using STATA software. Results: Twenty RCTs involving 770 patients with intermediate posterior maxillary RBH and 837 concerned maxillary sinuses who received 1,486 implants using any of the 4 rehabilitation methods were included. There were no statistically significant differences among the 4 groups for implant and prosthesis failure rates and marginal bone loss at follow-up (range, 6 months to 5 years after loading). There was a

Journal of Cranio-Maxillofacial Surgery, 2017

Among the different surgical treatments for keratocystic odontogenic tumors (KOTs), there is no s... more Among the different surgical treatments for keratocystic odontogenic tumors (KOTs), there is no single method associated with a zero recurrence rate (RR). Thus, this study aimed to seek the best surgical treatment with the least RR using a weighted event rated meta-analysis. To address our study purpose, a systematic review and meta-analysis based on the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guideline was performed. An extensive search of major databases through PubMed, EMBASE, and Cochrane CENTRAL was conducted to identify all relevant articles published without language restrictions from inception to August 2016. Relevant articles were selected based on the following inclusion criteria: prospective, retrospective, and case series studies that assessed various treatments in non-syndromic KOTs in which RRs were included. The predictor variable was treatment groups, namely: enucleation alone, enucleation with peripheral ostectomy, enucleation with Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution application, enucleation with cryotherapy, marsupialization alone, decompression followed by residual cystectomy, and resection. The outcome variable was RR. A weighted RR using a random effect model (because of variation in follow-up time) with a 95% confidence interval (CI) was performed. Data analysis was performed using a comprehensive meta-analysis software. A total of 2287 KOTs in 35 studies were included in this analysis. The weighted RR for various treatment techniques was as follows: enucleation alone (23.1%), enucleation with curettage (17.4%), enucleation and Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution (11.5%), enucleation plus liquid nitrogen cryotherapy (14.5%), marsupialization alone (32.3%), decompression followed by residual cystectomy (14.6%), and resection (8.4%). The pooled weighted overall RR of KOTs for all different treatments was 16.6%. Radical resection remains the certain option for obtaining the lowest recurrence with KOTs. However, low recurrence accompanies enucleation with application of Carnoy&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s solution or cryotherapy as the first-line treatment for primary KOTs. Marsupialization (where indicated) must be followed by secondary cystectomy to minimize recurrence. We believe that to achieve the least possible morbidity, resections should be reserved for multiple recurrent lesions and possibly syndromic cases.

Tanta Dental Journal, 2015

Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for ... more Abstract Objective To compare three-dimensional plate versus double-miniplate osteosynthesis for the stability of unfavorable mandibular angle fractures. Patients and methods Sixteen adult patients with unfavorable mandibular angle fracture; were selected from the Outpatient Clinic, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Tanta University. The patients were divided into two equal groups, group I was treated by 3D miniplate while group II was treated by two miniplates fixation technique. Postoperative clinical evaluation included presence of infection, position of the mandibular lower border, bony union, state of occlusion, maximal mouth opening, sensory nerve function, condition of teeth related to the fracture line and; patient's tolerance to the plate. In radiographic follow up, adequate reduction, status of teeth related to the fracture line and hardware condition were observed. Also, quantitative measurements were performed to assess bone density at the fracture site and inter-ramus distance. Results Wound healing was optimal in all cases of both groups except case No 4 of group II where dehiscence and mild infection happened. Satisfactory occlusion was obtained in all cases of both groups except case No 4 of group II where it had mild occlusal derangement. Other parameters including maximal mouth opening, sensory nerve function, and patient's tolerance to the plate were comparable. There were no significant differences between group I and group II regarding bone density and inter-ramus distance. Conclusion Three-dimensional plate osteosynthesis was comparable to double-miniplate osteosynthesis in fixation of unfavorable mandibular angle fractures. Both systems provided enough stability for proper bone healing, establishment of optimal occlusion, and early return to normal function.

Open Journal of Stomatology

Although maxillofacial fractures are not as common in children as in adults, trauma is still the ... more Although maxillofacial fractures are not as common in children as in adults, trauma is still the leading cause of morbidity and mortality in the pediatric population worldwide. The aim of this study was to review the pattern and prevalence of pediatric maxillofacial fractures in a sample of the Yemeni population aged 18 years and below. A retrospective analysis of patient records and radiographs was conducted for the 4 year period between June 2016 and October 2020. A total of 71 patients had 87 fractures divided into three age groups, i.e., preschool group (0-6 years), primary school group (7-12 years) and teenage group (13-18 years). The male to female ratio was 2.38:1 and the highest incidence occurred in the age group 13 to 18 years. The main etiological factor was road traffic accidents (RTA), however, falls were the primary etiology in the preschool age group. We conclude that maxillofacial trauma in pediatric patients is associated mainly with RTA and fall and; the mandible is more affected than other maxillofacial structures with the condyle being the most frequently fractured mandibular site.