Prevalence and location of the posterior superior alveolar artery using cone-beam computed tomography

Tehranchi, Maryam,Taleghani, Ferial,Shahab, Shahriar,Nouri, Arash Korean Academy of Oral and Maxillofacial Radiology 2017 Imaging Science in Dentistry Vol.47 No.1

Purpose: Insufficient knowledge of the anatomy of the maxillary sinuses prior to sinus graft surgery may lead to perioperative or postoperative complications. This study sought to characterize the position of the posterior superior alveolar artery (PSAA) within the maxillary sinuses using cone-beam computed tomography (CBCT). Materials and Methods: A total of 300 patients with edentulous posterior maxillae, including 138 females and 162 males with an age range of 33-86 years, who presented to a radiology clinic between 2013 and 2015 were enrolled in this retrospective cross-sectional study. The distance from the inferior border of the PSAA to the alveolar crest according to the residual ridge classification by Lekholm and Zarb, the distance from the PSAA to the nasal septum and zygomatic arch, and the diameter and position of the PSAA were all assessed on patients' CBCT scans. The data were analyzed using the Mann-Whitney test and the t-test. Results: The PSAA was detected on the CBCT scans of 87% of the patients; it was located beneath the sinus membrane in 47% of cases and was intraosseous in 47% of cases. The diameter of the artery was between 1 and 2 mm in most patients (72%). The mean diameter of the artery was $1.29{\pm}0.39mm$, and the mean distances from the PSAA to the zygomatic arch, nasal septum, and alveolar crest were $22.59{\pm}4.89mm$, $26.51{\pm}3.52mm$, and $16.7{\pm}3.96mm$, respectively. Conclusion: The likelihood of detecting the PSAA on CBCT scans is high; its location is intraosseous or beneath the sinus membrane in most patients. Determining the exact location of the PSAA on CBCT scans preoperatively can help prevent it from being damaged during surgery.

Tolterodine to Relieve Urinary Symptoms Following Transurethral Resection of the Prostate: A Double-Blind Placebo-Controlled Randomized Clinical Trial

Ali Tehranchi,Yousef Rezaei,Reza Shojaee 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.4

Purpose: To evaluate the effect of tolterodine on early storage symptoms following transurethralresection of the prostate. Materials and Methods: Seventy patients over 55 years of age who underwent transurethralresection of the prostate owing to benign prostatic hyperplasia were randomlyassigned to receive either 2 mg of tolterodine twice daily (treatment group) or matchedplacebo during a 1-month study period. Before and 1 month after the procedure, theywere asked to complete the International Prostate Symptom Score (IPSS) questionnaireand quality of life subscale to assess their symptoms. Also, analgesic use andadverse drug events were determined at follow-up. Results: Of 70 allocated patients, 64 patients (91.4%), including 33 in the treatmentgroup and 31 in the placebo group, completed the study. The mean age of the patientswas 67 years. None of the patients’ basic clinical characteristics were significantlydifferent. At the end of the follow-up period, the total IPSS and quality of life score hadsignificantly improved in the patients receiving tolterodine compared with those receivingplacebo (p=0.001 and p=0.036, respectively). The treatment group compared withplacebo demonstrated significant improvements in frequency and urgency but not innocturia. The amount of consumed painkiller was also significantly lower in the tolterodinegroup than in the placebo group (p=0.0001). The rate of side effects was not significantlydifferent between the groups. Conclusions: Administering 2 mg of tolterodine twice daily is an effective and well-toleratedregimen to relieve early storage symptoms, quality of life, and the amount ofanalgesic consumption following transurethral resection of the prostate.

Prevalence and location of the posterior superior alveolar artery using cone-beam computed tomography

Maryam Tehranchi,Ferial Taleghani,Shahriar Shahab,Arash Nouri 대한영상치의학회 2017 Imaging Science in Dentistry Vol.47 No.1

Purpose: Insufficient knowledge of the anatomy of the maxillary sinuses prior to sinus graft surgery may lead to perioperative or postoperative complications. This study sought to characterize the position of the posterior superior alveolar artery (PSAA) within the maxillary sinuses using cone-beam computed tomography (CBCT). Materials and Methods: A total of 300 patients with edentulous posterior maxillae, including 138 females and 162 males with an age range of 33-86 years, who presented to a radiology clinic between 2013 and 2015 were enrolled in this retrospective cross-sectional study. The distance from the inferior border of the PSAA to the alveolar crest according to the residual ridge classification by Lekholm and Zarb, the distance from the PSAA to the nasal septum and zygomatic arch, and the diameter and position of the PSAA were all assessed on patients’ CBCT scans. The data were analyzed using the Mann-Whitney test and the t-test. Results: The PSAA was detected on the CBCT scans of 87% of the patients; it was located beneath the sinus membrane in 47% of cases and was intraosseous in 47% of cases. The diameter of the artery was between 1 and 2 mm in most patients (72%). The mean diameter of the artery was 1.29±0.39 mm, and the mean distances from the PSAA to the zygomatic arch, nasal septum, and alveolar crest were 22.59±4.89 mm, 26.51±3.52 mm, and 16.7±3.96 mm, respectively. Conclusion: The likelihood of detecting the PSAA on CBCT scans is high; its location is intraosseous or beneath the sinus membrane in most patients. Determining the exact location of the PSAA on CBCT scans preoperatively can help prevent it from being damaged during surgery.

Determination of the Atomic Number Density of Rb Vapor by Using Spectral Faraday Rotation Measurements

M. M. Tehranchi,S. M. Hamidi,B. Abaie 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.5

We present a highly precise method for measuring the atomic number density of metallic vapor with the aid of spectral Faraday rotation measurements. By using the Rb spectral Faraday rotations at different temperatures and magnetic fields, we achieve the atomic vapor density of Rb. Our results show good agreement between the measured and the calculated atomic number density of Rb vapor.

Tunable all-optical wavelength broadcasting in a PPLN with multiple QPM peaks.

Ahlawat, Meenu,Tehranchi, Amirhossein,Pandiyan, Krishnamoorthy,Cha, Myoungsik,Kashyap, Raman Optical Society of America 2012 Optics express Vol.20 No.24

<P>We experimentally demonstrate tunable multiple-idler wavelength broadcasting of a signal to selective channels for wavelength division multiplexing (WDM). This is based on cascaded χ(2) nonlinear mixing process in a novel multiple-QPM 10-mm-long periodically poled LiNbO3 having an aperiodic domain in the center. The idlers' spacing is varied utilizing detuning of the pump wavelength within the SHG bandwidth. The temperature-assisted tuning of QPM pump wavelengths allows shifting the idlers together to different set of WDM channels. Our experimental results indicate that an overall idler wavelength shift of less than 10 nm realized by selecting pump wavelengths via temperature tuning, is sufficient to cover up to 40 WDM channels for multiple idlers broadcasting.</P>

Percutaneous Decortication of Cystic Renal Disease

Sepehr Hamedanchi,Ali Tehranchi 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.10

Purpose: To assess the efficacy of percutaneous unroofing in the treatment of simple renal cysts instead of laparoscopic decortication and open surgeries. Materials and Methods: From November 2009 to October 2010 at our department, 11 patients with 12 simple cyst units were managed by percutaneous unroofing. All cysts were evaluated with ultrasonography and abdominal computed tomography. If there were no contraindications, cyst wall resection was performed. A standard transurethral resectoscope was used to resect the cyst wall, and the parenchymal portion of the cyst was subsequently cauterized. The drain was left in place for 2 days. Results: At the 5-month follow-up, patients were asked about their symptoms and ultrasonography was performed. From 12 cyst units, 8 were completely resolved, 3 were reduced to less than 50%, and 1 was persistent to near its original size. Success was defined as a more than 50% reduction in cyst volume. Conclusions: Simple renal cysts can be safely managed by percutaneous unroofing with a success rate of more than 90%. This technique can offer several advantages over open surgery, such as decreased length of hospital stay, improved convalescence, and reduced risk of complications. Percutaneous resection also avoids the multiple trocar sites, extensive dissection, and technical difficulty associated with laparoscopy. Purpose: To assess the efficacy of percutaneous unroofing in the treatment of simple renal cysts instead of laparoscopic decortication and open surgeries. Materials and Methods: From November 2009 to October 2010 at our department, 11 patients with 12 simple cyst units were managed by percutaneous unroofing. All cysts were evaluated with ultrasonography and abdominal computed tomography. If there were no contraindications, cyst wall resection was performed. A standard transurethral resectoscope was used to resect the cyst wall, and the parenchymal portion of the cyst was subsequently cauterized. The drain was left in place for 2 days. Results: At the 5-month follow-up, patients were asked about their symptoms and ultrasonography was performed. From 12 cyst units, 8 were completely resolved, 3 were reduced to less than 50%, and 1 was persistent to near its original size. Success was defined as a more than 50% reduction in cyst volume. Conclusions: Simple renal cysts can be safely managed by percutaneous unroofing with a success rate of more than 90%. This technique can offer several advantages over open surgery, such as decreased length of hospital stay, improved convalescence, and reduced risk of complications. Percutaneous resection also avoids the multiple trocar sites, extensive dissection, and technical difficulty associated with laparoscopy.