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Öğe Angular photogrammetric analysis of the soft tissue facial profile of Turkish adults(OXFORD UNIV PRESS, 2009) Malkoc, Siddik; Demir, Abdullah; Uysal, Tancan; Canbuldu, NaciOne of the most important components of orthodontic diagnosis and treatment planning is the evaluation of the patient's soft tissue profile. The aim of this study was to develop angular photogrammetric standards for Class I Anatolian Turkish males and females. A random sample of 100 Turkish individuals (46 males and 54 females; ages 19-25 years) was obtained. The photographic set-up consisted of a tripod that held a 35 mm camera and a primary flash. The camera was used in its manual position and photographic records were taken of the subjects in natural head posture. The photographic records, 35 mm slide format, were digitized and analyzed using the Quick Ceph Image software program for Windows. Twelve measurements were digitally analyzed on each photograph. For statistical evaluation a Student's t-test was performed and the reliability of the method was analyzed. The results were compared with reported norms of facial aesthetics. The nasofrontal (G-N-Prn), nasal (Cm-Sn/N-Prn), vertical nasal (N-Prn/TV), and nasal dorsum (N-Mn-Prn) angles showed statistically insignificant gender differences (P > 0.05). The nasolabial angle (Cm-Sn-Ls) demonstrated large variability. Gender differences were present in the mentolabial (Li-Sm-Pg) and cervicomental (G-Pg/C-Me) angles. The mentolabial angle showed a high method error and large variability. Facial (G-Sn-Pg) and total facial (G-Prn-Pg) convexity angles were similar, while Cm-Sn-Ls angle range was larger compared with other angles. The mean values obtained from this sample can be used for comparison with records of subjects with the same characteristics and following the same photogrammetric technique. Angular photogrammetric profile analysis can provide the orthodontist with a way of determining problems associated with various soft tissue segments of the face.Öğe The Association of Occlusal Factors With Masticatory Muscle Tenderness in 10- to 19-Year Old Turkish Subjects(2005) Demir, Abdullah; Uysal, Tancan; Basçiftçi, Faruk Ayhan; Guray, EnisThe aims of this study were (1) to investigate the relationship between occlusal factors and masticatory muscle tenderness among 10- to 19-year-old (mean 14 years eight months) Turkish subjects and (2) to identify possible sex differences between them. The sample consisted of 716 individuals (355 male and 361 female subjects). Tenderness with palpation of masseter and temporalis muscles and functional manipulation of lateral and medial pterygoid muscles was registered. The examiners recorded the Angle classification bilaterally for molars, presence of anterior and posterior crossbites, excessive overjet, open and deep bites, functional shift, and severity of anterior crowding. Associations between the occlusal factors and muscle tenderness according to sex were evaluated with chi-square analysis. Statistically significant associations were found between masticatory muscle tenderness and all the investigated occlusal factors except posterior crossbite and functional shift. Masseter, medial, and lateral pterygoid muscle tenderness was higher in female subjects. Medial and lateral pterygoid muscle tenderness in Class I cases and masseter and medial pterygoid muscle tenderness in Class II, division 1 malocclusion cases were higher in female subjects (P < .05). In open-bite cases, medial pterygoid muscle tenderness (P < .05), in deep-bite cases, masseter (P < .01) and medial pterygoid (P < .05) muscle tenderness, and in excessive overjet cases, masseter muscle tenderness (P < .05) were also higher in female subjects. These results suggest that greater masticatory muscle tenderness in female subjects may contribute to the greater prevalence of temporomandibular disorders in them.Öğe Comparison of retention characteristics of Essix and Hawley retainers(KOREAN ASSOC ORTHODONTISTS, 2012) Demir, Abdullah; Babacan, Hasan; Nalcaci, Ruhi; Topcuoglu, TolgaObjective: We aimed to compare the retention characteristics of Essix and Hawley retainers. Methods: Adolescents undergoing fixed appliance treatment at 2 centers were recruited for this study. Twenty-two patients (16 women and 6 men) wore Essix retainers (Essix group) while 20 (14 women and 6 men) wore Hawley retainers (Hawley group). The mean retention time was 1 year, and the mean follow-up recall time for both groups was 2 years. Two qualified dental examiners evaluated the blind patient data. Maxillary and mandibular dental casts and lateral cephalograms were analyzed at 4 stages: pretreatment (T1), post-treatment (T2), post-retention (T3), and follow-up (T4). Results: The results revealed that Essix appliances were more efficient in retaining the anterior teeth in the mandible during a 1-year retention period. The irregularity index increased in both arches in both groups after a 2-year post-retention period. The mandibular arch lengths increased during treatment and tended to return to their original value after retention in both groups; however, these changes were statistically significant only in the Hawley group. Cephalometric variables did not show any significant differences. Conclusions: The retention characteristics of both Essix and Hawley retainers are similar. [Korean J Orthod 2012;42(5):255-262]Öğe Conventional and high intensity halogen light effects on water sorption and microhardness of orthodontic adhesives(E H ANGLE EDUCATION RESEARCH FOUNDATION, INC, 2008) Uysal, Tancan; Basciftci, Faruk Ayhan; Sener, Yagmur; Botsali, Murat Selim; Demir, AbdullahObjective: To test the null hypothesis that when the equivalent total light energy is irradiated to three orthodontic adhesive resins, there is no difference between the microhardness and water sorption values regardless of the curing light sources. Materials and Methods: Samples were divided into six groups according to the combination of three orthodontic adhesives (Kurasper F, Light-Bond, Transbond XT) and two light intensities (quartz tungsten halogen [QTH] and high intensity quartz tungsten halogen [HQTH]). One half of each of the 40 samples of three adhesive pastes was polymerized for 20 seconds by a QTH light source, and the other half was polymerized for 10 seconds by a HQTH light source. Water sorption was determined and Vickers hardness was established with three measurements per sample at the top, center, and bottom. Statistical analysis was performed using two-way analysis of variance (ANOVA) with multiple comparisons (Tukey-HSD). Results: Statistically significant differences were found among all adhesives for water sorption and hardness values cured with QTH and HQTH. The HQTH curing unit resulted in higher values than did the QTH. The highest water sorption values were observed for Kurasper F cured with HQTH and the lowest value was observed for Transbond XT cured with QTH. For microhardness Light-Bond cured with HQTH produced the highest values, and Transbond XT cured with QTH produced the lowest. Conclusions: When the equivalent total light energy is irradiated to three orthodontic adhesive resins, there are significant differences between the microhardness and water sorption values cured with the QTH and HQTH light source. The null hypothesis is rejected.Öğe Conventional and High-Intensity Halogen Light Effects on Polymerization Shrinkage of Orthodontic Adhesives(E H Angle Education Research Foundation, Inc, 2006) Şener, Yağmur; Uysal, Tancan; Başçiftçi, Faruk Ayhan; Demir, Abdullah; Botsalı, Murat SelimThe objectives of this study were to compare the polymerization shrinkage of three orthodontic adhesives. In addition we wanted to determine the effectiveness of the high-intensity quartz tungsten halogen (HQTH) in curing orthodontic adhesives on polymerization shrinkage with that of the quartz tungsten halogen (QTH). A total of 120 glass ring molds were prepared using a low-speed saw. The internal surface of the glass rings were roughened and etched. Adhesive pastes were placed into the glass molds, which were sandwiched between two glass slides. Samples were divided into six groups according to the combination of three orthodontic adhesives (Kurasper F, Light Bond, and Transbond XT) and two light intensities. One half of each 40 samples of three adhesive pastes was polymerized for 20 seconds by a QTH (Hilux 350), and the other half was polymerized for 10 seconds by a HQTH (Optilux 501). The volumetric polymerization shrinkage for each system was measured through the specific density method modified by Puckett and Smith. Statistical analysis was performed using two-way analysis of variance for intergroup comparisons. The HQTH-curing unit resulted in a more polymerization shrinkage than did the QTH for all investigated adhesives. However, no statistically significant differences were found. The highest shrinkage was observed for Light Bond cured with HQTH (1.59 +/- 0.82%), and the lowest value was observed for Transbond XT cured with QTH (1.23 +/- 0.60%). There are no significant differences in polymerization shrinkage of the three investigated orthodontic adhesives when polymerized with a QTH or a HQTH.Öğe The effect of tooth bleaching on the shear bond strength of orthodontic brackets using self-etching primer systems(2013) Akın, Mehmet; Aksakallı, Sertaç; Başçiftci, Faruk Ayhan; Demir, AbdullahObjective: The purpose of this study was to determine the effect of 10% carbamide peroxide and 38% hydrogen peroxide bleaching agents on the shear bond strength of orthodontic brackets using self-etching primer systems. Methods: Forty five freshly extracted human premolar teeth were randomly divided into 3 groups of 15 teeth each: control (group 1), 10% carbamide peroxide at-home bleached (group 2), and 38% hydrogen peroxide in-office bleached (group 3). Three weeks later, all brackets were bonded using a self-etching primer system. The shear bond strength of these brackets was measured and recorded in MPa. Adhesive remnant index (ARI) scores were determined after the brackets failed. Data were analyzed using Kruskal- Wallis test, pairwise comparisons were made using the Mann-Whitney U test and ARI scores were analyzed using a chi-square test at a significance level of P<.05. Results: The shear bond strengths of group 1 (mean: 17.7 ± 9.7 MPa) were significantly higher (P<.05) than those of group 3 (mean: 9.9 ± 5.4 MPa). No significant differences were found between group 2 (mean: 12.3 ± 4.7) and either group 1 or group 3 (P>.05). ARI scores did not differ significantly among the 3 groups. Conclusions: The use of 10% carbamide peroxide bleaching does not significantly reduce shear bond strength values. In contrast, use of 38% hydrogen peroxide bleaching significantly reduces these values.Öğe Effects of strontium ranelate on sutural bone formation: a histological and immunohistochemical study(AUSTRALIAN SOC ORTHODONTISTS INC, 2016) Karatas, Orhan H.; Toy, Ebubekir; Demir, Abdullah; Toy, Hatice; Kozacioglu, SumeyyeAim: Rapid maxillary expansion is performed to correct a skeletal transverse deficiency of the maxilla, which is a frequently encountered orthodontic anomaly. Strontium ranelate (SrR) is a novel agent that has a dual action, involving anti-resorptive and bone-forming effects. The aim of this study was to evaluate the effects of systemically applied SrR on osteoblastic bone formation after maxillary expansion on the mid-palatal suture of rats using histological and immunohistochemical tests. Materials and methods: A total of 24 Wistar rats were randomly divided into two equal groups. In all animals, five-day inter-premaxillary expansion was applied and maintained for a seven-day retention period, during which 625mg/kg/day SrR diluted with saline solution was administered orally to the experimental group. The rats were sacrificed and the tissues prepared for histological and immunohistochemical examinations after the retention period. Results: Osteoblastic activity and the width of the blood vessels in the suture area were significantly increased in the SrR group compared with the control group (p < 0.05). Ossification was also observed to be active under light microscopy by staining with hematoxylin and eosin in the experimental group. Immunohistochemical labelling performed using osteonectin, osteocalcin, TGF-beta and VEGF antibodies revealed significant immunoreactivity in the experimental group (p < 0.05). Conclusion: It may be concluded that SrR contributed to stimulatory osteogenesis in the expansion region. Therefore, a retention period may be shortened and relapse possibly reduced, following the application of SrR after the expansion.Öğe Effects of Thermocycling on the Degree of Cure of Two Lingual Retainer Composites(Japanese Soc Dental Materials Devices, 2010) Çatalbaş, Bülent; Uysal, Tancan; Nur, Metin; Demir, Abdullah; Gündüz, BenizThe aim of this study was to evaluate the effects of thermocycling on the degree of cure (DC) and water sorption behavior of two lingual retainer composites. A total of 50 composite specimens, 5 mm diameter and 2 mm height, were prepared using Light Cure Retainer (R) (LCR) (Reliance) and Transbond Lingual Retainer (R) (TLR) (3M Unitek). After 40-second curing with a halogen light and after 24-hour water storage, the composite specimens were subjected to different thermocycling regimes. Absorbance peaks to monitor the DC were recorded using Fourier transform infrared (FTIR) spectroscopy, while water sorption was calculated in mu g/mm(3). On DC, significant differences among the different thermocycling regimes were observed only for the TLR specimens (p<0.05). On water sorption behavior, an increase in the number of thermal cycles resulted in increased water sorption for both composites, but the statistical differences in these groups were not significant. On the effect of thermocycling up to 20,000 cycles, present findings showed that LCR was less affected than TLR. Further, LCR exhibited higher DC and lower water sorption values than TLR after thermal cycling.Öğe Farklı malokluzyon gruplarında çeneler arası diş boyutu uyumsuzluklarının karşılaştırılması(2005) Nur, Metin; Malkoç, Sadık; Çatalbaş, Bülent; Başçiftçi, Faruk A.; Demir, AbdullahBu çalışmanın amacı; Sınıf I, Sınıf II Bölüm 1, Sınıf II Bölüm 2 ve Sınıf III malokluzyon ve normal okluzyon olguları arasında Bolton oranları bakımından farklılıklar olup olmadığını araştırmak ve cinsiyetin oynadığı rolü belirlemektir. Gruplar Sınıf I malokluzyon, Sınıf II Bölüm 1, Sınıf II Bölüm 2 ve Sınıf III malokluzyon ve normal okluzyon olmak üzere toplam 5 gruba ayrıldı. Her bir grup 60 kız ve 60 erkek bireyden oluşturuldu. Toplam 600 kişinin alt ve üst çenelerine ait sert alçıdan dökülmüş çalışma modelleri üzerinde, dijital bir kumpas yardımıyla mesio-distal diş boyutu ölçümleri yapıldı. Çeneler arası diş boyutu uyumsuzluklarını belirlemek için Bolton Analizi'nde belirtilen anterior ve toplam oranlar hesaplandı. Bu oranlar farklı malokluzyon grupları ve cinsiyetler arasında karşılaştırıldı. İstatistiksel değerlendirmeler SPSS for Windows (Version 10.0) programı ile yapılmıştır. Gruplar arası karşılaştırma için tek yönlü varyans analizi (ANOVA) ve Tukey HSD testleri kullanılmıştır. Tukey HSD testinde, gruplar arasındaki ikili karşılaştırmalar için harflendirme metodu kullanılmıştır. Araştırmamızda malokluzyon olgularında (Sınıf 1malokluzyon, Sınıf II Bölüm 1, Sınıf II Bölüm 2 ve Sınıf III malokluzyon) diş boyutu oranları bakımından cinsiyetler arasında fark olmadığı,normal okluzyon olgularında ise anterior oran değerinin kız bireylerde daha yüksek değerde olduğu tespit edilmiştir. Kız bireylerde anterior oranlar bakımından Sınıf III ve Sınıf 2 Bölüm 1 malokluzyonlar arasında anlamlı fark bulunduğu, toplam oranlarda ise normal okluzyon ile Sınıf II Bölüm 1 malokluzyon ve normal okluzyon ile Sınıf II Bölüm 2 malokluzyon olguları arasında istatistiksel olarak anlamlı fark olduğu gözlenmiştir.Çalışmada Türk popülasyonu için tespit edilen anterior ve toplam oran değerlerinin Bolton'un önermiş olduğu oran değerlerinden daha yüksek olduğu göz önüne alınarak, ortodontik teşhis ve tedavi planlamasında dikkate alınması faydalı olacaktır. {Türk Ortodonti Dergisi 2005;18:99-108)Öğe İskeletsel Sınıf III Hastanın Ortodontik Tedavi ve Ortognatik Cerrahi ile Kombine Tedavisi ve Ortaya Çıkan Komplikasyon: Subkondiler Kırık(2012) Karameşe, Mehtap; İleri, Zehra; Abacı, Malik; Akıncı, Özlem; Tosun, Zekeriya; Demir, AbdullahIn this case report, combined treatment of female patient with skeletal and dental Class III malocclusion with orthodontic-orthognathic surgery, and subcondylar fracture which is a rare complication of surgical treatment are discussed.Öğe Microcomputed tomography evaluation of white spot lesion remineralization with various procedures(MOSBY-ELSEVIER, 2016) Kucuk, Eyup Burak; Malkoc, Siddik; Demir, AbdullahIntroduction: The aim of this study was to use microcomputed tomography to evaluate the effects on white spot lesions of 3 remineralizing agents compared with artificial saliva (Inonu University, Malatya, Turkey). The agents were GC Tooth Mousse (GC International, Itabashi-ku, Tokyo, Japan), 50-ppm sodium fluoride solution (Inonu University, Malatya, Turkey), and Clinpro 5000 (3M ESPE Dental Products (St Paul, Minn). The experimental and control teeth were stored in artificial saliva. Methods: Forty-four extracted premolars were divided into 4 groups of 11 teeth each (3 experimental groups and 1 control group). After white spot lesions were created on the teeth, a remineralizing agent was applied. Microcomputed tomography scanning was performed at the following times: T0 (sound enamel), T1 (day 0, when the white spot lesion was formed), T2 (day 15), and T3 (day 30). Volume, depth, surface area, and mineral density changes of the white spot lesions were evaluated at different time points using CTAn software (SkyScan; Bruker, Kontich, Belgium). Results: GC Tooth Mousse and Clinpro 5000 improved all measurements after 30 days. However, Clinpro 5000 was not as effective in reducing lesion depth as it was in the other parameters. The artificial saliva group and the 50-ppm sodium fluoride solution did not show significant effects in the regression of the white spot lesions at the end of the 30-day experiment. Conclusions: GC Tooth Mousse and Clinpro 5000 were more effective in remineralization of white spot lesions than sodium fluoride solution and artificial saliva. They can be preferred for use clinically. Microcomputed tomography is a novel and effective method that shows promise in accurately evaluating white spot lesions and remineralization.Öğe Ortodontik Maloklüzyonlar ve Tedavi Seçeneklerinin Değerlendirilmesi: Epidemiolojik Çalışma(2003) Sarı, Zafer; Uysal, Tancan; Karaman, Ali İhya; Başçiftçi, Faruk Ayhan; Üşümez, Serdar; Demir, AbdullahOrtodontik maloklüzyona sahip ve ortodonti kliniğine tedavi olmak için başvurmuş bireylerde görülen ortodontik maloklüzyon tiplerinin, spesifik anomali dağılımlarının tespit edilmesi ve çekimli-çekimsiz tedavilerin uygulanma sıklığının belirlenmesi amacıyla bu çalışma gerçekleştirilmiştir. Selçuk Üniversitesi Diş Hekimliği Fakültesi Ortodonti A.D.'da, Ekim 1998-Temmuz 2002 dönemi içinde tedaviye alınmış, 1602 birey araştırma kapsamına alındı. Vaka kayıt raporlarından, ortodontik maloklüzyonlar, spesifik anomaliler (open bite, konjenital diş eksikliği, gömülü kaninler, polidiastemalar), spesifik tedavi tipleri (ortognatik cerrahi uygulamaları, erişkin ve bebek dudak damak yarığı tedavileri, temporomandibuler eklem hastalıklarının tedavisi) ve ortodontik amaçla uygulanan çekim açısından tedavi yöntemleri belirlendi. Anomali tiplerinin belirlenmesinde Angle sınıflandırması göz önünde bulunduruldu. Genel olarak, vakaların % 61,69'unun Sınıfl, %28,07'sinin Sınıf II, %10,24'ünün Sınıf III maloklüzyona sahip olduğu belirlenirken; vakaların % 34,49'unun tedavisi çekim/i % 65,51'inin tedavisinin ise çekimsiz olarak yapıldığı belirlendi. Spesifik anomalilerden; open bite % 2,68, gömülü kanin % 2,18, polidiastema % 1,62, konjenital diş eksikliği % 3,05 oranında tespit edildi. Spesifik tedavi tiplerinden olan ortognatik cerrahi uygulamalarının %1,37, dudak damak yangı tedavisinin % 5,49, eklem tedavisinin ise % 5,36 oranında uygulandığı saptanmıştır. Bu değerlendirmeler ışığında, klinik hasta verilerinin belirli periyatlarda tekrar gözden geçirilip karşılaştırılmasının uygun olacağı sonucuna varıldı.Öğe Residual monomer release from orthodontic adhesives cured with different light sources(TAYLOR & FRANCIS LTD, 2016) Botsali, Murat Selim; Sozer, Ozlem Akinci; Altunsoy, Mustafa; Demir, Abdullah; Ulker, Hayriye EsraIntroduction: The aim of this study was to evaluate the residual monomer release from orthodontic adhesives cured with light-emitting diode (LED) and halogen light sources.Methods: Seven hundred and twenty stainless steel brackets were divided into 3 groups according to the adhesive system used (Transbond XT light-cure adhesive [TXT], Transbond LR capsule [LR], and Light Bond light-cure adhesive paste [LB]), and each group was divided into 2 subgroups according to light-curing procedure (LED or halogen). Brackets were bonded with adhesives onto tooth buccal surfaces and polymerized. Each specimen contained 24 brackets that simulated the oral environment (n=5). The specimens were immersed in a 75% ethanol/water solution at 37 degrees C for 10min, 1h, 1 d, 7 d, 14 d, and 30 d, respectively. Eluted monomers (Bis-GMA, UDMA, and TEGDMA) were detected using HPLC.Results: There was residual monomer release at all time periods, and the highest amount of release was observed cumulatively on the 30th day. The cumulative Bis-GMA released from adhesives was not different (p>0.05). The cumulative TEGDMA released from adhesives was statistically different (p<0.05). There was no statistical difference between QTH and LED light-curing units for each adhesive (p>0.05).Conclusions: The release of residual monomers stays at a high level for a long time after polymerization. The total leaching of residual monomers from the Light Bond light-cure sealant resin plus Light Bond light-cure adhesive paste was higher than that of other materials for both curing units. Different curing units (LED or QTH) did not affect the monomer release from the orthodontic adhesives.Öğe Sınıf I ve Sınıf II Bölüm 2 Maloklüzyona Sahip Bireylerde Hyoid Kemik Pozisyonu(2003) Sarı, Zafer; Uysal, Tancan; Çatalbaş, Bülent; Demir, Abdullah; Üşümez, Serdar; Başçiftçi, Faruk AyhanBirçok çalışmada, hyoid kemik pozisyonunun, değişen mandibular pozisyon veya baş postürü ile ilişkili olarak farklılık gösterdiği belirtilmiştir. Araştırmanın amacı, sınıf II bölüm 2 anomaliye sahip bireylerde, hyoid kemik pozisyonunu antero-posterior ve vertikal yönde değerlendirmek aynı zamanda iskeletsel sınıf l maloklüzyona sahip bireylerle karşılaştırmaktır. Bu çalışma iskeletsel ve dental sınıf l maloklüzyona sahip, normal büyüme yönü gösteren 12 kız 7 erkek toplam 19 bireye (yaş ört. 13,4 1,5) ait lateral sefalometrik filmler ile iskeletsel sınıf II, dental sınıf II bölüm 2 maloklüzyona sahip 14 kız 5 erkek toplam 19 bireye (yaş ört. 13,5 2,2) ait lateral sefalometrik filmler üzerinde yürütüldü. Hyoid kemik konumunu belirlemek amacıyla, 9 sagital, 5 vertikal, 5 açısal; toplam 21 ölçümden yararlanıldı. Yapılan ölçümlerin istatistiksel olarak değerlendirilmesi student t testi ile yapıldı. Ayrıca metot hatası Dahlberg formülü ile hesaplandı. Verilerin değerlendirilmesi sonucunda hyoid kemiği-nin, sınıf II bölüm 2 grubunda, sagital yönde, daha geride; ver-tikal yönde, üst referans düzlemlerine daha yakın; açısal olarak ise, yer düzlemine daha paralel bir konum arz ettiği belirlendi, ancak bu değerlerin hiçbirisinin istatistiksel olarak önemli dü-zeyde olmadığı görüldü. Sonuç olarak, sınıf II bölüm 2 anomali grubu ile sınıf 1 grubu arasında hyoid kemik konumu açısından önemli bir fark bulunmamakla beraber rakamsal olarak sınıf IIbölüm 2 grubunda hyoid konumu vakanın genel özelliklerini yansıtır tarzdadır.Öğe Sınıf II Malokluzyonun İki aşamalı Tedavisinin Uzun Süreli Sonuçları(2010) Demir, Abdullah; Başçiftçi, Faruk; Üşümez, Serdar; Göyenç, YaşarAmaç: Bu çalınmanın amacı, aktivatör apareyi ile başlayıp edgewise a pareyi ile devam eden tedaviden 8 yıl sonra meydana gelen dentoiskeletsel değişiklikleri değerlendirmektir. Bireyler ve Yöntem: Çalışma, iskelet sel Sınıf II ve dental Sınıt II molar İlişkiye sahip 18 çocuğu (10 erkek ve 8 kız, yaşları ortalaması 12,2 1,4 yıl) kapsamaktadır. Çocukların tedavi öncesinde (T1), ANB açıları 4'den ve overjetlûri 7 mm'den büyüktü Standardize edilmiş lateral sefalogramlar sentrik oklüzyonda tedavi başında, aktivatör tedavisi sonunda, sabit aparey tedavisi sonrasında ve sabit aparevler çıkartıldıktan 6,2 yıl sonra alınmıştır. On açısal ve 9 cizgisel sefalometrık ölçüm belirlenmiştir. Tedavi değişikliklerini incelemek için eşleştirilmiş t-testi kullanılmıştır. Bulgular: Aktif tedavi periyodu (T3) sonrasında iskeletscl ilişki düzeldi ve maksi İler ve mandibular uzunluklar (Co-A ve Go-Gn) ve SNB'de önemli (p-0,000) artış gözlenmiştir. Üst keserler önemli derecede (d0.02 5) dikleşti ve retrüze (U1-NA) oldu. IMPA ve mandibular düzlem açısı (Go-Gn-SN) sabit kalırken, SNA ve ANB açıları önemli derecede (sırasıyla, p -0,012, p0,000) azalmıştır. SNA ve A-N?FH'de ölçüm değerlerinin çok az başlangıç haline dönmesi dışında, T4'deki değişiklikler T3 sonundaki ile uyumlu olduğu belirlenmiştir. Sonuç: Sabit edgewise apareyleri ile devam eden aktivatör aparey tedavisi ile elde edilen anteroposterior dentoiskeletsel değişikliklerin 6,2 yıl boyunca sabit kaldığı gösterilmiştir.Öğe Sınıf II maloklüzyonun iskeletsel ve dental karakteristiğinin belirlenmesi(2005) Demir, Abdullah; Uysal, Tancan; Başçiftçi, Faruk AyhanBu araştırmanın amacı Sınıf II bölüm 1 maloklüzyona sahip hastalarda maksilla ve mandibulanın iskeletsel ve dental pozisyonunu farklı sefalometrik göstergeler aracılığıyla değerlendirmek, cinsiyet farklılıklarını belirlemek ve elde edilen Sınıf II bireylere ait ölçüm değerlerini mevcut Türk normlarıyla karşılaştırarak maloklüzyonu oluşturan temel öğeleri ortaya koymaktır. Sınıf II maloklüzyona sahip 8-14 yaş aralığındaki 48 erkek, 52 kız; toplam 100 birey (yaş ortalaması 12 yaş 5 ay 1 yaş 6 ay) araştırma kapsamına dahil edildi. Araştırmada maksiller ve mandibuler iskeletsel ve dental pozisyonların tespitinde 4 farklı analize ait ölçümler kullanıldı. Başçiftçi ve ark.'ları tarafından oluşturulmuş Türk normları referans standart olarak alındı. Cinsiyet farklılıkların tespitinde ve bireylerin iskeletsel ve dental ölçümlerinin Türk normları ile karşılaştırılmasında student t-testi uygulandı. Genel olarak incelendiğinde Sınıf II maloklüzyona sahip bireylerin sagital yönde normal konumda maksiller ve retrüziv mandibuler kaideye sahip oldukları, alt ve üst keserlerin normal eğim ve konumda oldukları ve normal vertikal boyut ilişkisi gösterdikleri belirlenmiştir. Cinsiyetler arasında fark sadece U1-NA (o) ölçümünde bulundu. Kızların daha önde üst keserlere sahip olduğu ve farkın istatistiksel olarak anlamlı olduğu görüldü. Türk normlarıyla yapılan karşılaştırmalar sonucunda A noktasının Nasion vertikale olan mesafesi ve L1-NB açısı hariç tüm verilerde istatistiksel olarak anlamlı farklılık tespit edilmiştir (p0,001). Farklı cinsiyetlerdeki Sınıf II maloklüzyona sahip bireylerin normal oklüzyonlu bireylerle karşılaştırma sonuçları da toplam değerlendirmeyi desteklemektedir. Sonuç olarak bu çalışma Sınıf II özellik gösteren 8-14 yaş döneminde incelenen 100 hastanın, normal maksiller kaide ile birlikte mandibuler retrüzyon karakteristiğinin daha baskın olduğunu göstermektedir ve literatürdeki benzer amaçlarla yapılmış çalışmaların bi çoğunu destekler niteliktedir.Öğe Temperature increase during orthodontic bonding with different curing units using an infrared camera(INFORMA HEALTHCARE, 2014) Aksakallı, Sertaç; Demir, Abdullah; Selek, Murat; Taşdemir, ŞakirAim. To evaluate the effects of different curing units and light-tip tooth surface distances on the temperature increase generated during orthodontic bonding, using an infrared camera (IR) and artificial neural networks (ANN). Materials and methods. Fifty-two freshly extracted human premolar teeth were used. Metallic orthodontic brackets were bonded to the buccal surfaces of the teeth and thermal records were taken using an IR camera and ANN. Brackets were cured with a lightemitting diode (LED) and high intensity halogen (HQTH). Teeth were divided into four groups according to the curing units (LED and HQTH) and curing distances (from tooth surface and 10 mm away from tooth surface). The results were analyzed with analysis of variance (ANOVA) and the Tukey HSD test. Results. The ANOVA and Tukey HSD tests revealed that temperature changes were influenced by the type of light source and exposure times. All groups revealed significant differences between each other (p < 0.001). The highest surface temperature increase was gained from curing with a LED unit from the tooth surface (11.35 degrees C +/- 0.91 degrees C). The lowest surface temperature increase was gained from curing with a HQTH unit 10 mm away from the tooth surface (2.57 degrees C +/- 0.6 degrees C). Conclusion. The LED unit induced significantly higher temperature changes than did the HQTH. The temperature increase during orthodontic bonding was increased with long exposure time. A shorter light-tip tooth surface distance leads to greater increases in temperature.
