OBJECTIVE: The aim of this study was to evaluate the potency of panoramic radiography for the detection of maxillary impacted canines. METHODS: Twenty-five patients were selected, comprised of 7 males (mean age: 10.9 years, range: 8.5 - 14.5 years) and 18 females (mean age: 10.9 years, range: 8.2 - 15.7 years). In total, thirty-five maxillary impacted canines were estimated. The position of the canine and root resorption of adjacent teeth were evaluated on panoramic radiography and 3D CT. RESULTS: Except for angulation to the occlusal plane, the other parameters, such as tooth length, crown width, vertical distance and lateral shift showed larger values on panoramic radiography compared to 3D CT. In palatally impacted cases, the angulation of canine was smaller, and the vertical distance to the occlusal place was larger on panoramic radiography than 3D CT. For labially impacted canines, tooth length, crown width, and angulation to the occlusal plane were similar for the two methods. The sensitivity for detecting root resorption on panoramic radiography was calculated as being 33.3% of 3D CT. CONCLUSIONS: The position of labially impacted canines can be effectively estimated using panoramic radiography, but palatally impacted canines need further investigation such as 3D CT for proper diagnosis.
Crowns ; Dental Occlusion ; Female ; Humans ; Hypogonadism ; Male ; Mitochondrial Diseases ; Ophthalmoplegia ; Radiography, Panoramic ; Root Resorption ; Tooth

Tooth impaction represents the stop of eruption by clinical and radiographical disturbance in eruption path or the dislocation of tooth germ. The most common factor in tooth eruption disorders are spacial deficiency with other causes reported to be odontogenic tumors, periodontal ligament injury, etc. Impaction of the mandibular second molar is relatively rare and reported in about 3 out of 1,000 people. Because the second molars tend to erupt in a mesial direction, this situation can lead to serious problems if untreated, including dental caries, periodontal disease and root resorption of the first molar. Treatment of this problem includes, surgical repositioning and orthodontic forced eruption. Because each procedure have the definite advantages and disadvantages, and influenced by circumferential environment, these have limits for successful recovery as independent treatment. In a case at St. Mary's Hospital, we performed successful correction of a horizontal impacted mandibular second molar using a miniplate skeletal anchorage system. We introduce this treatment as a valid method for an impacted second molar and consider a oromaxillofacial surgeon's role in tooth movement treatment.]]>
Dental Caries ; Dislocations ; Molar ; Odontogenic Tumors ; Orthodontic Extrusion ; Periodontal Diseases ; Periodontal Ligament ; Root Resorption ; Tooth ; Tooth Eruption ; Tooth Germ ; Tooth Movement

The aim of this article was to examine the research articles regarding biological and mechanical properties of cryopreserved teeth for potential use in tooth transplantation. A systematic review of literatures was performed by Pubmed searching with assigned key words from January 1, 1990 to June 8, 2009. All articles were examined for inclusion criteria. Secondary search was conducted by hand-search through references of included articles from primary search. A total of 24 articles were obtained from both primary and secondary search and used as fundamental articles in this review. Periodontal ligament tissues of cryopreserved teeth were able to maintain their biological properties resulted in a satisfactory healing of periodontium. Dental pulp tissues, however, may be compromised by limitation of permeability of cryopreservative agent into pulp cavity. Therefore, an endodontic treatment of transplanted cryopreserved teeth was recommended. Cryopreserved teeth had comparable mechanical properties to those of normal teeth. Importantly, the success of cryopreserved tooth transplantation treatment in orthodontic patients was reported. The cryopreserved teeth for tooth banking have a potential clinical application for treatment of missing teeth. Case selection, however, is critical for treatment success. More studies and data regarding masticatory function and periodontal healing of transplanted cryopreserved teeth are needed.
Cryopreservation ; methods ; Dental Enamel Permeability ; Dental Pulp ; blood supply ; cytology ; physiopathology ; Dentin Permeability ; Humans ; Periodontal Ligament ; physiology ; Tissue Banks ; Tooth ; transplantation

Tooth wear is known as a normal physiological process which gradually progresses. It is reported that vertical dimension can be kept stable because amount of physiologically worn loss could be compensated by growth of alveolar bone and tooth eruption. However, excessive tooth wear as pathologic wear can cause pathologic pulp, disharmony with occlusal plane, functional disorders and esthetic problems so that full mouth rehabilitation could be needed in these cases. Recovery of function and esthetic improvement should be considered for alteration of the vertical dimension. Determination of the vertical dimension of occlusion is needed to be in harmony with the neuromuscular system. This clinical report describes 36 year-old female patient who had chief complaint of severely worn dentition and esthetic discomfort. An increase of 2.0 mm at maxillary incisal edge was done to restore vertical dimension. It was based on the degree of tooth wear and esthetics.
Ceramics* ; Dental Occlusion ; Dentition ; Esthetics ; Female ; Humans ; Mouth Rehabilitation ; Physiological Processes ; Recovery of Function ; Rehabilitation* ; Tooth Eruption ; Tooth Wear* ; Tooth* ; Vertical Dimension

Tooth wear is known as a normal physiological process which gradually progresses. It is reported that vertical dimension can be kept stable because amount of physiologically worn loss could be compensated by growth of alveolar bone and tooth eruption. However, excessive tooth wear as pathologic wear can cause pathologic pulp, disharmony with occlusal plane, functional disorders and esthetic problems so that full mouth rehabilitation could be needed in these cases. Recovery of function and esthetic improvement should be considered for alteration of the vertical dimension. Determination of the vertical dimension of occlusion is needed to be in harmony with the neuromuscular system. This clinical report describes 36 year-old female patient who had chief complaint of severely worn dentition and esthetic discomfort. An increase of 2.0 mm at maxillary incisal edge was done to restore vertical dimension. It was based on the degree of tooth wear and esthetics.
Ceramics* ; Dental Occlusion ; Dentition ; Esthetics ; Female ; Humans ; Mouth Rehabilitation ; Physiological Processes ; Recovery of Function ; Rehabilitation* ; Tooth Eruption ; Tooth Wear* ; Tooth* ; Vertical Dimension

Traumatic injuries of the face often involve root fractures especially in anterior teeth. The prognosis and the treatment of the root fracture depend on the extent of the fracture line, general health and patient compliance. This case report outlines a new conservative trial treatment modality to stabilize the maxillary central incisors with horizontal root fracture on the cervical to middle third by fabricating canine guidance to remove loading on the traumatized maxillary central incisors during eccentric movements and thus inducing spontaneous healing of the fractured line between the fragments. Radiographs after thirty months showed adequate healing with no signs of pathological changes including root resorption, ankylosis or displacement. Long term follow-up revealed that vitality, stability and aesthetics were maintained and the patient was satisfied with the outcome.
Ankylosis ; Dental Occlusion ; Displacement (Psychology) ; Esthetics ; Follow-Up Studies ; Humans ; Incisor ; Patient Compliance ; Prognosis ; Root Resorption ; Tooth

PURPOSE: Autogenous transplantation of teeth can be defined as transplantation of teeth from one site to another in the same individual, involving transfer of impacted or erupted teeth into extraction sites or surgically prepared sockets". Successful autogenous transplantation of teeth depends upon a complex variety of factors. Such factors include damage to the periodontal ligament of the donor tooth, residual bone height of the recipient site, extra-oral time of tooth during surgery. Schwartz and Andreasen previously reported that autogenous transplantation of teeth with incomplete root formation demonstrated higher success rate than that of teeth with complete root formation. Gault and Mejare yielded similar rate of successful autogenous transplantation both in teeth with complete root formation and in teeth with incomplete root formation when appropriate cases were selected. This case report was aimed at the clinical and radiographic view in autogenous transplantation of teeth with complete root formation. MATERIALS AND METHODS: Patients who presented to the department of periodontics, Chonnam National University Hospital underwent autogenous transplantation of teeth. One patient had vertical root fracture in a upper right second molar and upper left third molar was transplanted. And another patient who needed orthodontic treatment had residual root due to caries on upper right first premolar. Upper right premolar was extracted and lower right second premolar was transplanted. Six months later, orthodontic force was applied. RESULTS: 7 months or 11/2 year later, each patient had clinically shallow pocket depth and normal tooth mobility. Root resorption and bone loss were not observed in radiograph and function was maintained successfully. CONCLUSION: Autogenous transplantation is considered as a predictive procedure when it is performed for the appropriate indication and when maintenance is achieved through regular radiographic taking and follow-up.
Bicuspid ; Follow-Up Studies ; Humans ; Molar ; Molar, Third ; Periodontal Ligament ; Periodontics ; Root Resorption ; Tissue Donors ; Tooth ; Tooth Mobility ; Transplants

Inflammatory external root resorption (IERR) refers to the pathological process of dissolving the hard tissue on the outer surface of the tooth root by the body's own immune system under the stimulation of various physical and chemical factors such as infection, stress, trauma and orthodontic treatment. Severe IERR can lead to endodontic and periodontal diseases, and even the loss of teeth. Therefore, understanding the etiology and the pathogenic mechanism of IERR are of importance in its prevention and treatment. This article will review the etiology and the regulation mechanisms of IERR.
Dental Cementum ; Humans ; Root Resorption ; Tooth Root

The purpose of this study was to investigate the root resorption pattern in incisors in dog under intrusive orthodontic loadings of various magnitude and duration. Intrusive forces were generated by closed coil springs. Force magnitudes were 15-30gm, 50-60gm and 80-110gm. Durations were continuous and intermittent. Intermittent duration was applied at intervals of 12 hours. The readjustment of the force was done every 4 days. The forces were maintained for 30 days. All specimens were decalfied, embedded in paraffin and stained with hematoxylin-eosin stain. Observations were made with light microscope. The following results were obtained; 1. The continuity of root surface was ceased in all, except intermittent forced teeth with 25gm. 2. The root resorptions, cementoclasts and cemental lacunae, were increased around periapical regions and the destructive scope of bone was deeply extended as the exerted orthodontic forces increased. 3. It was inspected that, under the same forces, root resorption and bone destruction were more deeply appeared in the continuously forced teeth than the intermittently forced ones. 4. All of the alveolar bone, showed direct and undermining bone resorptions.
Animals ; Bone Resorption ; Dogs* ; Incisor* ; Osteoclasts ; Paraffin ; Root Resorption* ; Tooth

Tooth resorption is an idiopathic destructive disease of dental hard tissues. The etiology and pathogenesis remain obscure. It has various manifestations and can be commonly classified as internal tooth resorption and external root resorption on the basis of the resorptive lesion sites. There have been many attempts to make further classification based upon the pathological manifestations in recent years. Radiographic examination is an effective tool to assist in the diagnosis. There are few systematic researches on tooth resorption worldwide, most of which are case reports. This review elaborates on the research progress of tooth resorption from aspects of pathogenesis and classification.
Humans ; Root Resorption/diagnostic imaging* ; Tooth Resorption/diagnostic imaging*