Biomedical subjects
Orgun Deren
Publications and source records attributed to Orgun Deren.
Late complication of abdominoplasty in an obese patient: systemic inflammatory response syndrome and seroma.
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Augmentation rhinoplasty with dermal graft and review of the literature.
Nasal augmentation required following a trauma or a rhinoplasty operation poses a challenging problem to many plastic surgeons. Currently, allografts and autologous tissues are used for nasal augmentation; however, an ideal technique has not yet been described. Although preferred for augmentation of different parts of the body, pure dermal graft use has not been described for nasal augmentation. The authors performed nasal augmentation using a dermal graft in 90 patients in their hospital between 1994 and 2000, and they followed up the patients for 6 months to 8 years. In this article, the early and late results of dermal grafts for nasal augmentation are presented, and their advantages and disadvantages are discussed with a review of the literature. It was concluded that the easily obtained dermal graft could be an appropriate alternative in nasal augmentation, though it has not been used widely for this purpose.
Primary extremity actinomycosis causing osteomyelitis of the hand.
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Treatment of anogenital warts by pulsed dye laser.
BACKGROUND: Treatment of anogenital warts is difficult in that the disease spectrum is wide. Moreover, varying degrees of improvement are obtained. OBJECTIVE: To study the treatment of persistent anogenital warts by pulsed dye laser. METHODS: Pulsed dye laser was used with the following settings: spot size 7 mm, pulse duration 1500 microsec, and fluence 7.5 J/cm2. Two different wavelengths were used: 585 and 595 nm. RESULTS: Lesions healed completely using both wavelengths after one treatment. CONCLUSION: Pulsed dye laser has been found to be safe, effective, satisfactory, and less traumatic compared to other options for treatment of perianal warts in children.
Prospective comparative study of the range of movement of temporomandibular joints after mandibular fractures: rigid or non-rigid fixation.
Temporomandibular joints (TMJ) are negatively affected by trauma and disuse. In this prospective study, 103 patients with mandibular fractures were evaluated for the influence of trauma and maxillomandibular fixation on the TMJ. A total of 54 patients were treated by maxillomandibular fixation and 49 by titanium miniplate fixation. Those patients with condylar fractures and multiple mandibular fractures and malocclusion at presentation were not included in the study. The control group consisted of 44 randomly-selected healthy people with no past history of mandibular fracture or symptoms referable to the TMJ. Trauma was a major factor leading to TMJ dysfunction and maxillomandibular fixation increased the incidence and severity of TMJ dysfunction.
Cartilage shaping with the Er:YAG laser: an in vivo experimental study.
Reshaping and preserving the new shape of cartilage grafts is important for reconstruction of congenital or acquired deformities. In this in vivo study the authors investigated the effect of the Er:YAG laser on cartilage reshaping in comparison with scalpel stripping. The study consisted of two groups (N = 9). After measuring the angle between two margins of the ear, the cartilage in the right ear in rabbits was reshaped using the Er:YAG laser in group I, and scalpel incisions were used to reshape the left-ear cartilage in group II rabbits. Changes in the shape of the ears were evaluated at 10 days, and 1 and 6 months. The laser-reshaped ears were flattened and preserved the new flattened shape at the end of 6 months. The ultrastructural changes in the cartilage were evaluated based on the results from histopathological examination and electron microscopy. The authors conclude that cartilage can be reshaped using the Er:YAG laser. The mechanical effect of laser ablation and the thermal effect of laser radiation caused ultrastructural changes in the cartilage tissue, resulting in permanent changes in cartilage shape.
Importance of pedicle length in inferior pedicle technique and long-term outcome of areola-to-fold distance.
Various techniques are being used to perform reduction mammaplasty. One of the most widely used techniques is the inferior pedicle technique. To our knowledge, there are not many studies on long-term changes in areola-to-fold distance, distribution of pedicle length, and its importance. Therefore, in this study, breast volume, suprasternal notch-to-nipple distance, and nipple-to-inframammary fold distance were analyzed and the movement range of the nipple-areola complex was determined. In addition, the degree of benefit derived from the technique and the degree of long-term ptosis were investigated. The desired transposition of the nipple can be achieved by the inferior pedicle technique. The most serious complication of reduction mammaplasty is impairment of the blood supply to the nipple. However, the inferior pedicle technique has a slight possibility of causing the above complications. The most important criterion in deciding whether to perform free nipple technique or inferior pedicle technique is the pedicle length. This is a detailed study on the pedicle length and its statistical analysis.
Postauricular cartilage storage in rhinoplasty.
In the past decade, the number of patients demanding rhinoplasty has increased, and this has increased the use of grafts. Although different materials are used as grafts, cartilage is the most popular one. In secondary rhinoplasties the need for cartilage is very frequent. The most suitable cartilage grafts are the ones extracted during primary rhinoplasty. These grafts are disposed of after the operation and in a secondary operation, grafts are obtained from a new donor site. In our department, the surplus cartilages obtained during primary rhinoplasties of the patients who are thought to be probable secondary rhinoplasty candidates are stored in a postauricular pocket after their volumes are measured and marked down. In the secondary operations the volume of the grafts are measured again and the grafts are used. We have found out that there is no significant difference between the initial and secondary volumes of lower lateral cartilages (3.6% of initial volume is lost), but the difference between the initial and secondary volumes of septal cartilages is significant (6.9% of initial volume is lost), and the stored cartilages are sufficient qualitatively and quantitatively for the secondary rhinoplasties.
Umbrella graft of columella tip: 20 years' experience.
We present our experience with nasal grafts over 20 years. The nose, located centrally, always plays a key role in facial aesthetics. Public recognition of this makes rhinoplasty the most popular operation. From the traditional aesthetic point of view, propogated by the media, the nose must be narrow and straight and have correct nasolabial and forehead angles. It is the desire of every surgeon to obtain permanent and satisfactory cosmetic results. However, it is not always possible to obtain good cosmetic appearance using conventional methods when the nose is small or large, when the columella is short, or when the skin is thick. Mostly, nasal tip projection cannot be achieved. In the present article, we report our experiences in primary asthetic rhinoplasty using cartilaginous grafts obtained from septum, costa, and ear as umbrella grafts of columella type.