Browsing by Author "Ozkan, Birkan Taha"

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Comparison of the Effect of 2 Hypotensive Anesthetic Techniques on Early Recovery Complications After Orthognathic Surgery
(Lippincott Williams & Wilkins, 2012) Tabrizi, Reza; Eftekharian, Hamid Reza; Langner, Nicole Janine; Ozkan, Birkan Taha
The aim of this study was to evaluate the recovery complications following the use of 2 anesthetic protocols in orthognathic surgery, namely, propofol with remifentanil and isoflurane with remifentanil. Sixty-two patients with American Society of Anesthesiologists physical status I were selected. All underwent bimaxillary orthognathic surgery. Propofol with remifentanil was used as an anesthesia in group 1 (n = 32), and isoflurane with remifentanil was used in the patients in group 2 (n - 30). Early recovery complications consisting of pain, postoperative nausea and vomiting (PONV), shivering, and agitation were evaluated and documented. The length of the operation and duration of recovery were documented for all patients. Analysis of the data demonstrated no relationship between age and recovery time (P > 0.05). Analysis of data with chi(2) and independent t-tests did not show any difference between the 2 groups with regard to pain, agitation, PONV, and shivering (P > 0.05). Logistic regression was used to evaluate the effect of the operation time on recovery complications. The analysis showed that pain and PONV were significantly higher in those who experienced a longer operation time. With increasing operation time longer than 165 minutes, 64% of patients experienced pain, and 89% of them had PONV. General anesthesia can be provided via intravenously administered medications and/or inhaled volatile anesthetics. No significant difference in early recovery time was found in patients when either isoflurane or propofol was used to maintain the anesthesia. However, the length of the operation played a major role in increasing early recovery complications.
Complete or a Partial Sheet of Deep Temporal Fascial Graft as a Radix Graft for Radix Augmentation
(Springer, 2011) Besharatizadeh, Rosina; Ozkan, Birkan Taha; Tabrizi, Reza
Autogenous fascia, including the temporalis fascia, has a particular role in rhinoplasty as radix and dorsal onlay grafts. The main purpose of this study is to achieve desired appearance of facial harmony using either a complete or partial sheet of deep temporal fascia as a radix graft in the patients with required permanent radix augmentation. This is a prospective study of 15 patients who referred to Gandi Day Clinic, Tehran, Iran, between 2005 and 2006 and underwent rhinoplasty including nasal radix augmentation using deep temporalis fascia through external rhinoplasty approach. The patients with hump noses had low radix and required radix augmentation. Full sheet facial graft was used in 13 patients. Partial sheet facial graft was used in two patients. As a donor site problem, minor hematoma was observed in one patient. Temporary hair loss in incision line was another problem which were seen in five. As for the recipient site, no infection, persistent erythema of nasal skin extrusion, visibility, displacement of graft materials or irregularity of graft contour were observed postoperatively. Resorption rate was approximately 30% for grafted fascia. Using fascia grafts in radix point, the revision rate was minimal. In order to augment the radix, if 4 mm augmentation is needed, it should be considered that full sheet fascia graft alone would be insufficient. If more than 4 mm of augmentation is needed, 30% overcorrection would manage well the permanent radix augmentation without any problem.
Correction of Lower Facial Wideness Due To Masseter Hypertrophy
(Lippincott Williams & Wilkins, 2010) Tabrizi, Reza; Ozkan, Birkan Taha; Zare, Samira
Masseter hypertrophy is an uncommon condition that can cause aesthetic and functional problems. Various treatment options were suggested by authors. We used surgical intraoral approaches in 5 patients, which consist of masseter muscle reduction and mono-cortical ostectomy in the angle of the mandible. Results showed good aesthetic results without any complication. We suggest the use of surgical treatment to gain optimal aesthetic results especially in a square face.
Insertion of Buccally Tilted and Placed Implants in Edentulous Atrophic Posterior Mandibular Sites
(Diagnosis Press Ltd, 2012) Ozkan, Birkan Taha; Eskitascioglu, Gurcan; Cigerim, Levent; Kaplan, Volkan
This paper presents our new methodology and evaluates the feasibility of buccally tilted and placed implant combined with standard abutment placement in patients with insufficient bone height through implant software programme. Forty patients with 62 mandibular sites were measured in computed tomography (CT) imaging. The Buccally tilted and placed implants combined with standard abutment simulation were administered in implant software programme. The different parameters were measured in CT The localization of inferior alveolar nerve and implant, inclination degree of implant, transversal and vertical thickness of local distances etc. were evaluated in order to eliminate the nerve injury with providing interocclusal relationship. The buccal distance at the mandibular canal level was higher than the lingual distance in posterior mandible at lower first molar region. The mean inclination degree of the implant fixtures were 17.85 +/- 8.01. The mean measurement of the acquired length of implant during implant placement simulation was 11.06 +/- 1.73. The mean distance of the vertical gain was 3.81 +/- 1.84. The hypothesis of buccally positioned and tilted implant placement instead of advanced surgical procedures would be preferable in atrophic posterior mandibula.
Management of Bilateral Masseter Muscle Hypertrophy
(Lippincott Williams & Wilkins, 2012) Ozkan, Birkan Taha; Tabrizi, Reza; Cigerim, Levent
Masseter muscle hypertrophy is characterized by unilateral or bilateral enlargement of the masseter muscles affecting both females and males after puberty. Limitations on mouth opening, swollen cheek, and also tension in the region of the hypertrophied muscle are symptoms reported. Also, masseter hypertrophy can cause aesthetic and functional problems. A 40-year old woman was referred to our clinic with the chief complaint of facial appearance with square-face type. To eliminate undesirable facial appearance, surgical intraoral approach compromising reduction of deep masseter muscle with monocortical and bicortical ostectomy of the angle of the mandible was performed. The patient was satisfied with both functional outcomes and aesthetic outcomes on both facial profile and frontal view. No complication was seen intraoperatively and postoperatively after a 12-month follow-up period. This treatment modality would be suggested to gain optimal aesthetic results especially in a square face from the lateral profile.
Marsupialization as a Treatment Option for the Odontogenic Keratocyst
(Lippincott Williams & Wilkins, 2012) Tabrizi, Reza; Ozkan, Birkan Taha; Dehgani, Ali; Langner, Nicole Janine
Background and Purpose: The odontogenic keratocyst (OKC) is an unusual cyst with a high recurrence rate. The most common site for OKCs is by far the mandible. The best treatment of OKC remains controversial. Recurrence rates ranging anywhere from less than 10% to more than 60% have been reported. The aim of our study was to evaluate marsupialization as a treatment option for OKC. Methods: We managed 13 patients (8 male, 5 female) between the ages of 16 and 31 years (mean, 22.4 y) with biopsy-proven OKC. Radiographically, the patients' cyst sizes were between 25 and 90 mm. Treatment consisted of marsupialization. We followed up with patients for a total duration of at least 60 months, and posttreatment visits were carried out at 6-month intervals. Results: We documented cured or reduced cyst size with radiography. The odontogenic keratocyst resolved completely in 10 patients, and the cyst walls shrank in 3 patients. The latter patients required a second operation to remove the associated impacted teeth. A histologic evaluation of 3 lesions showed metaplasia. Any case of recurring cysts was not seen during the entire follow-up period. Conclusions: Marsupialization is an effective and conservative treatment option for OKC. Nevertheless, future studies should conduct even longer follow-up periods to evaluate any recurrence of lesions.
Nonossifying Fibroma Secondary To Aneurysmal Bone Cyst in the Mandibular Condyle
(Lippincott Williams & Wilkins, 2011) Tabrizi, Reza; Nejhad, Sima Torabi; Ozkan, Birkan Taha
Nonossifying fibromas (NOFs) are benign lesions that unusually occur in the mandible. Nonossifying fibromas are asymptomatic and spontaneous resolution at skeletal maturity. Nonossifying fibromas associated with aneurysmal bone cyst (ABC) are very rare. In this clinical report, NOF secondary to ABC in the mandibular condyle was reported; however, it presents different clinical behavior than the usual NOF. In this case, severe destruction in the mandibular condyle as a characteristic of NOF was seen. In the follow-up period, no recurrence was seen subsequent to treatment of lesion with complete resection. Treatment of NOFs with secondary ABC would require aggressive intervention than the treatment of usual NOF.