Cone-Beam Computed Tomography for Oral and Maxillofacial Imaging

The invention of computed tomography (CT) technique revolutionized diagnostic imaging. Compared to conventional X-ray imaging procedures, CT involves higher radiation doses. Recently, cone-beam CT (CBCT) specifically designed for maxillofacial imaging was introduced. CBCT technique is based on a cone-shaped X-ray beam centered on a two-dimensional (2D) detector. The detector system performs one rotation around the patient, producing a series of 2D images which are then reconstructed in a 3D data set. The contemporary knowledge regarding CBCT and its proper application guides the practitioner for improvement in diagnostic purposes and treatment planning. The aim of this chapter is to focus on the details, advantages, drawbacks, and clinical applications of CBCT as a headmost CT imaging technique in the oral and maxillofacial (OMF) region. The main clinical applications of CBCT in the OMF region are dentistry including dentoalveolar and maxillofacial surgery, orthodontics, endodontics, and periodontics; and otolaryngology. The aforementioned clinical use of CBCT was described in detail with illustrated sample cases. In most of the cases in OMF region, CBCT takes the place of multi-slice CT. Thus, clinicians should know the clinical applications and capabilities of CBCT technique with its drawbacks

Internal Derangements of the Temporomandibular Joint: Diagnosis and Management

Millions of individuals worldwide suffer from temporomandibular joint (TMJ) disorders and are characterized by pain and joint dysfunction. TMJ internal derangement (ID) is the most frequent type of temporomandibular disorders (TMDs). The ID of TMJ is defined as a joint dysfunction associated with an abnormal disc position. Identification and elimination of the causes of tissue breakdown of the TMJ that lead to ID are the key factors for successful treatment. The common causes for TMJ ID are trauma and parafunctional habits which lead to joint overload and degenerative changes in the articular structures, increased friction, and gradual disc displacement. Local and systemic inflammatory/degenerative arthropathies may also affect TMJ and cause ID. The aim of this chapter is to give comprehensive knowledge about the contemporary perspective of TMJ ID including diagnostic and therapeutic developments and innovations. Clinicians should establish the correct diagnosis and cause of the disease for appropriate management so that patients do not suffer from ineffective treatments. As an innovative development, TMJ replacements with alloplastic joint prosthesis and tissue-engineered structures hold promise for the future of management of TMJ ID

Effectiveness of kinesio taping on postoperative morbidity after impacted mandibular third molar surgery: a prospective, randomized, placebo-controlled clinical study

Objective: Our study seeks to investigate the effectiveness of kinesio taping (KT) on postoperative morbidity compared to placebo and control groups after impacted third molar surgery. Methodology: Sixty patients with impacted mandibular third molar were included in this prospective, randomized, placebo-controlled clinical study. After surgical extraction of the impacted tooth, patients were allocated into three groups (20 patients each): group 1 received KT (kinesio), group 2 received placebo taping (placebo), and group 3 received no taping (control). The groups were compared regarding facial swelling, pain and trismus. Swelling was evaluated using a tape measuring method. Pain was assessed by a visual analog scale and the number of analgesic tablets taken. Trismus was determined by measuring maximum mouth opening. Results: In the KT group, all parameters reduced significantly on 2nd and 4th postoperative days compared to other groups; however, placebo and control groups revealed comparable outcomes. On 7th day, all groups showed comparable results. Conclusions: The KT application is an effective method for reducing morbidity after impacted mandibular third molar surgery. However, placebo taping is not as effective as proper taping. Placebo taping shows similar results compared to no taping regarding facial swelling percentage, pain and trismus

To what extent does hyaluronic acid affect healing of xenografts? A histomorphometric study in a rabbit model

ABSTRACT Among the many graft materials that have been used for the treatment of bone defects in oral and maxillofacial regions is xenograft. To improve osteoconductive effects of xenografts, they have been combined with various biocompatible materials, such as hyaluronic acid and bone morphogenetic protein. Objective: To determine bone-healing capacity of high molecular weight hyaluronic acid (HA) combined with xenograft in rabbit calvarial bone defects. Material and methods: Ten adult male New Zealand rabbits (mean weight 3 kg) were included in the study. Three 6-mm-diameter bicortical cranial defects were created on calvarial bone of all rabbits. These defects were filled as follows: a) xenograft; b) HA+xenograft; c) autograft. One month after the first operation, rabbits were sacrificed. Specimens were evaluated histomorphometrically. Results: Considering multiple comparisons, differences regarding new bone were statistically significant between all groups (

Diagnostic Concordance Characteristics of Oral Cavity Lesions

Purpose. The objective of this study was to evaluate the diagnostic concordance characteristics of oral cavity lesions by comparing the clinical diagnosis of the lesions with the histopathologic diagnosis. Material and Method. A retrospective analysis was conducted on the patients, who were admitted with oral cavity pathology and underwent biopsy procedure between 2007 and 2011. The oral cavity lesions were classified into 6 different groups as odontogenic cysts, nonodontogenic cysts, odontogenic tumors, nonodontogenic tumors, malignant tumors, and precancerous lesions in accordance with the 2005 WHO classification. The diagnoses were also recategorized into 3 groups expressing prognostic implications as benign, precancerous, and malignant. The initial clinical diagnoses were compared with the histopathologic diagnoses. Data were analyzed statistically. Results. A total of 2718 cases were included. Histopathologic diagnosis did not match the clinical diagnosis in 6.7% of the cases. Nonodontogenic tumors and malignant tumors had the highest misdiagnosis rates (11.5% and 9%, resp.), followed by odontogenic tumors (7.7%), precancerous lesions (6.9%), and odontogenic cysts (4.4%). Clinicians were excelled in diagnosis of benign and precancerous lesions in clinical setting. Conclusion. The detailed discordance characteristics for each specific lesion should be considered during oral pathology practice to provide early detection without delay

Effects of hyperbaric oxygen treatment on implant osseointegration in experimental diabetes mellitus

Objective: To evaluate whether hyperbaric oxygen (HBO) treatment has a favorable effect on implant osseointegration in diabetic rabbits. Material and Methods: An experimental diabetes model was induced in 32 New Zealand rabbits through IV injection of alloxan. After the state of diabetes had been confirmed, one dental implant was placed in the metaphysical region of each animal’s tibia. After the implants’ placements, the animals were divided into two groups. Half of the animals underwent HBO treatment, while the other group did not receive HBO treatment and served as the control group. The animals were euthanized at the 4th and 8th weeks. The osseointegration of the implants were compared by histomorphometry and resonance frequency analysis (RFA). Results: The Bone Implant Contact (BIC) values were significantly higher in the HBO group than in the control group at the 4th week. There was no difference in the BIC values between the groups at the 8th week. There was no significant difference in the RFA scores between the groups both at the 4th and 8th weeks after the operation. Conclusion: Histomorphometry findings suggest that HBO has positive effect on implant osseointegration in the early healing period in diabetic rabbits. However, implant stability is not affected by HBO treatment

Opinion 2019 (Case 2899). Dodecaceria Concharum Oersted, 1843 And Heterocirrus Fimbriatus Verrill, 1879 (Currently D. Fimbriata) (Annelida, Polychaeta): Conservation Of Usage Of The Names By The Designation Of A Neotype For D. Concharum Not Approved

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Contemporary Approaches in the Repair of Alveolar Clefts

Cleft lip and palate is one of the most common craniofacial anomalies. The repair of the alveolar clefts is an important part of the treatment for patients with cleft lip and palate. The treatment concepts of alveolar bone grafting are still controversial. The corresponding controversial issues are; timing of alveolar bone grafting, graft materials, and timing of the orthodontic expansion. In the present article, aforementioned controversial issues and contemporary treatment modalities of the maxillary alveolar clefts were reviewed in the light of current literature. In conclusion, the most suitable time for alveolar bone grafting is mixed dentition period. Grafting procedure may be performed in the early or late phases of this period depending on some clinical features. Adjunct orthodontic expansion procedures should be performed before and/or after grafting depending on the patient's current features. [Archives Medical Review Journal 2014; 23(4.000): 563-574

Mandibular Condyle Fractures and Treatment Modalities

Maxillofacial injuries are most commonly associated with falls, motor and vehicle accidents, sports-related trauma, and interpersonel violence. The complexity of mandibular condyle region and its anatomic proximity to other craniofacial structures complicate diagnosis and treatment. Thus, treatment approaches of mandibular condyle fracture are still controversial. In the literature, different success rates are reported about observation versus treatment, closed reduction versus open reduction and fixation methods. In the present article, controversial issues related to mandibular condyle fractures were reviewed under the light of current literature. In conclusion, the simplest way that can be done with the least risk of complication should be chosen during treatment planning. In addition, current adjunctive treatment methods accelerating healing of fracture should be considered. [Archives Medical Review Journal 2014; 23(4.000): 658-671

The Effect of Gender on Problematic Internet Usage: A Meta-Analysis

The aim of this research is to analyze the effect of gender on problematic Internet usage by meta-analysis. Problematic Internet usage is defined by the deterioration of the important dimensions of individuals' lives, such as family and work, the failure to control the usage and compulsive usage of individuals due to the usage of the Internet. It is known that adolescents use the Internet more than other age groups. Therefore, adolescents are thought to be able to use the Internet in a non-functional way, besides, differences in the usage and duration of Internet usage according to gender have also been reported. PIUS and PIUS-A is being used in investigations on problematic Internet usage in Turkey frequently. Thus, the findings of the studies using these measurement tools were used in the analysis of this research. As a result of the literature review, 30 studies including PIUS and PIUS-A were detected and four studies were excluded from the analysis according to different reasons, thus the analyses were performed on the findings of 26 studies. Average effect size is .385 according to fixed effect model and could be considered small and in favor of males. Similarly, in studies where the type of research and the measurement tool used are considered as moderator variables, the effect size is small and in favor of males. As a result, problematic Internet usage of male adolescents may be noted as higher. The results were discussed in the light of cultural differences and parental attitudes