bluuebunny/crossref_metadata_2025_split huggingface dataset:
Orthodontic Treatment of Fused and Geminated Central Incisors: A Case Report
Authors: Hashim Hayder Abdallah 
Published: July 2019

Abstract
A 10-year old Egyptian male presented with a geminated upper right central incisor along with a fused and rotated upper left central incisor in cross bite. He also had severe crowding in the maxillary arch and a congenitally missing lower right first permanent premolar. Orthodontic treatment was carried out to align upper right and left central incisors, lateral incisors, and canines. Treatment options were discussed.

Citation
Hashim HA. Orthodontic Treatment of Fused and Geminated Central Incisors: A Case Report. J Contemp Dent Pract 2004 February;(5)1:136-144.
Medical Health and Medication Use in Elderly Dental Patients
Authors: Jainkittivong Aree , Aneksuk Vilaiwan , Langlais Robert P. 
Published: July 2019

AbstractThe objectives of this study were to obtain information on the medical conditions and medications used among elderly Thai dental patients and to investigate the relationship between the findings in relation to age and sex. The information regarding medical conditions and medication use was obtained from interviews of 510 dental patients aged 60 years and older. The incidence of medical conditions was 82.5%; women had a significantly higher incidence of medical conditions (86.5%) than men (76.5%). The incidence of medical conditions did not differ among the three age groups. Overall, cardiovascular disease was the leading problem (33.7%) with hypertension being the major component (26.1%). The prevalent problems were bone/joint disorders (32.4%), allergies (18.2%), diabetes mellitus (14.5%), and eye and ear problems (14.3%). In our sample, 65.5% reported taking medications, with an average of 1.5 drug groups per person. The average number of medications taken increased as age increased. Women took medications more frequently than men (70% vs. 58.5%). The four most prevalent drugs were cardiovascular agents (32%), endocrinologic drugs (14.5%), nutritional therapeutics (12.9%), and drugs acting on the musculoskeletal system (11.4%). The present study supports the findings of previous reports in that the presence of medical conditions is high in the elderly and the incidence of medication use increases with advancing age.CitationJainkittivong A, Aneksuk V, Langlais RP. Medical Health and Medication Use in Elderly Dental Patients. J Contemp Dent Pract 2004 February;(5)1:031-041.
The Visible Portion of Anterior Teeth at Rest
Authors: Al Wazzan Khalid A. 
Published: July 2019

Abstract
The visibility of anterior tooth surfaces with lips at rest or during function is an important factor in determining prosthodontic outcome. There is a lack of sufficient information published on this subject. The aim of this study was to investigate the degree of visibility of maxillary and mandibular anterior teeth surfaces when the lips are at rest. Four hundred seventy three adults were examined. All the subjects had maxillary and mandibular anterior teeth present with no caries, restorations, severe attrition, mobility, extrusion, or obvious deformities. The portions of anterior teeth that were visible were measured vertically using a Boley gauge from the border of the lip to the incisal edge for the incisors and to the cusp tip for the canines. The measurement was taken at the midpoint of the tooth when the lips and lower jaw were at the rest position. The length of the upper lip was measured from the base of the columella to the tip of the philtrum at the midline of the face. Males showed more of the maxillary lateral, canine, and mandibular anterior teeth than females. With increasing age, the amount of maxillary anterior teeth that was visible at rest decreased. The subjects with shorter upper lips displayed more maxillary central incisor structure than those with longer upper lips. Racial differences were not found. The amount of visible portions of anterior teeth is determined by muscle positions that vary from person to another. It provides an excellent starting point for vertical positioning anterior teeth that can be modified as necessary in any clinical situation. The findings of this study should help the dentist in providing aesthetic prosthodontic treatment that involves replacement of anterior teeth. A useful guideline for positioning anterior teeth is suggested.

Citation
Al Wazzan KA. The Visible Portion of Anterior Teeth at Rest. J Contemp Dent Pract 2004 February;(5)1:053-062.
Shear Bond Strengths and Microleakage of Four Types of Dentin Adhesive Materials
Authors: Ateyah Nasrien Z. , Elhejazi Ahmed A. 
Published: July 2019

AbstractThe aim of this investigation was to compare the microleakage of composite resin (Z-100) and shear bond strength to bovine dentin using different types of adhesive systems (Scotch Bond Multi-Purpose, All-Bond 2, One-Step, and Perma Quick) to compare and correlate microleakage to shear bond strength. For the microleakage aspect of the study, 20 class V were prepared (bovine incisors) with 90-degree cavosurface margins and were located at the cemento-enamel junction using a template. Each dentin bonding system was applied to five cavities following the manufacturer's instructions and restored with Z-100 composite resin. After 24 hours of storage in distilled water at 37°C, the teeth were immersed in 2% basic fuchsin dye. All teeth were sectioned in a mesiodistal direction using a diamond saw, and each section was then inspected under a stereomacroscope. For the shear bond strength aspect of the study, 20 bovine incisors were centrally horizontally mounted in Teflon mold with cold cure acrylic resin. Flat labial dentin surfaces were prepared using different grit silicon carbide abrasive wheels. Five specimens were used for each of the bonding agent systems. Each specimen was bonded with restorative composite resin (Z-100) and applied to the treated dentinal surface through a split Teflon mold. All specimens were stored in distilled water at 37°C for 24 hours. The bonds were stressed using shear forces at a crosshead speed of 0.5mm/min using an Instron Universal testing machine.Findings indicate none of the systems tested in this study were free from microleakage. Scotch bond multipurpose achieved the best seal, with One-Step being second best, while All-Bond 2 and Perma Quick had the poorest seal. However, there were significant differences among the shear bond strengths of the four bonding systems tested. Scotch Bond Multi-Purpose has a higher bond strength to composite resin when compared to the other dentin adhesives. The study also concluded there is no association between microleakage and shear bond strength.CitationAteyah AZ, Elhejazi AA. Shear Bond Strengths and Microleakage of Four Types of Dentin Adhesive Materials. J Contemp Dent Pract 2004 February;(5)1:063-073.
Photoelastic Study of the Effects of Occlusal Surface Morphology on Tooth Apical Stress from Vertical Bite Forces
Authors: Wang Mei-Qing , Zhang Min , Zhang Jun-Hua 
Published: July 2019

Abstract
The aim of the study was to determine how the morphology of occlusal surfaces might affect occlusal loading that is transferred to the tooth apex. Photoelastic methods were used to assess apical stress generated by seven variations of occlusions. A test assembly with a 2 kg weight was applied to teeth to create a vertical load. By analyzing the direction and magnitude of the apical principle stress under the polar light that was measured at the apexes of mandibular teeth, the occlusal loading position of each tooth and its direction was obtained based on general mechanical principles. It was found distal incline planes (or slopes) of cusps and lingual incline planes (or slope) of buccal cusps of mandibular posterior teeth carried the greatest occlusal load in normal occlusion. In the other six variations of occlusion presented in this study, the principle apical stresses changed more or less as a result of the different occlusal contact relationships. The magnitude of principle apical stress increased considerably in the flat surface occlusion because of the lack of distribution of occlusion loading by the smooth dentition surface. It is concluded the occlusal surface morphology has a significant effect on the direction and magnitude of apical stress. To establish a suitable relationship of occlusion that can conduct favorable occlusal loading physiologically is very important.

Citation
Wang M, Zhang M, Zhang J. Photoelastic Study of the Effects of Occlusal Surface Morphology on Tooth Apical Stress from Vertical Bite Forces . J Contemp Dent Pract 2004 February;(5)1:074-093.
Assessment of Morphological Changes and Permeability of Apical Dentin Surfaces Induced by Nd:YAG Laser Irradiation through Retrograde Cavity Surfaces
Authors: Bala Oya , Türköz Emin , Arisu Hacer Deniz , Alimzhanova Goulnara 
Published: July 2019

Abstract
The purpose of this in vitro study was to observe the morphological changes and apical dye penetration at apical dentin surfaces induced by Nd:YAG laser irradiation at different power settings with and without a laser initiator. Seventy five single rooted human maxillary anterior teeth were used. Following the establishment of the working lengths, the root canals were enlarged with step-back technique. The apex of each root was resected 3 mm perpendicular to its long axis. Standard Class I cavities of 2 mm depth and 2 mm width were prepared. The teeth were randomly divided into five groups with fifteen teeth in each. In Group 1, the retrograde cavity preparations were lased with Nd:YAG laser at 2 W and those in Group 2 preparations were lased with Nd:YAG laser at 3.2 W. In Group 3, the retrograde cavity surfaces were lased with Nd:YAG laser at 2 W following the application of India ink. Group 4 was lased with the same settings of Group 2 after an absorbent cotton point soaked with India ink was inserted into the cut dentinal surfaces and the inner walls of the apical preparations. Group 5 served as control. Five teeth from each group were examined using scanning electron microscopy (SEM). The amounts of smear layer, debris, and recrystalized dentin present were assessed and scored. Retrograde cavities of ten teeth from each group were filled with amalgam to examine apical dye penetration. The teeth were immersed in 2% basic fuscin and kept for 48 hours. Dye penetration was evaluated by stereomicroscope at a magnification of X10.
The results showed the usage of India ink with Nd:YAG laser enhanced the amount of melting and recrystalization of dentin and the radiation and initiator increased the leakage.

Citation
Arisu HD, Bala O, Alimzhanova G, Türköz E. Assessment of Morphological Changes and Permeability of Apical Dentin Surfaces Induced by Nd:YAG Laser Irradiation through Retrograde Cavity Surfaces. J Contemp Dent Pract 2004 May;(5)2:102-113.
The Prevalence and Relationship between Periodontal Disease and Pre-term Low Birth Weight Infants at King Khalid University Hospital in Riyadh, Saudi Arabia
Authors: Mokeem Sameer Abdullah , Molla Ghadeer Nabeel , Al-Jewair Thikriat Saleh 
Published: July 2019

Abstract
The aim of this study was to examine the prevalence and relationship between periodontal disease and preterm low birth weight (PLBW) among Saudi mothers at King Khalid University Hospital (KKUH) in Riyadh, Saudi Arabia. The periodontal status and the relative risk were also analyzed. The study consisted of 30 cases [infants <37 weeks and/or weighing ≥2.500 kilograms (kg)] and a daily random sample of 60 controls [≥37 weeks and/or weighing >2.500 kg]. Clinical periodontal indices were measured on the labor wards. Associated risk factors for periodontal disease and PLBW were ascertained by means of a structured questionnaire and maternal notes. The prevalence of the PLBW was found to be 11.3%, and the prevalence of periodontal disease was high among the study population. The risk of PLBW remained high with increasing periodontal disease (odds ratio [OR] 4.21, 95% confident interval [CI] 1.99-8.93) despite controlling the other risk factors such as age, smoking, and social class. In conclusion, there is a correlation between periodontal disease and PLBW in KKUH.

Citation
Mokeem SA, Molla GN, Al-Jewair TS. The Prevalence and Relationship between Periodontal Disease and Pre-term Low Birth Weight Infants at King Khalid University Hospital in Riyadh, Saudi Arabia. J Contemp Dent Pract 2004 May;(5)2:040-056.
Storage Phosphor Plates: How Durable are they as a Digital Dental Radiographic System?
Authors: Bedard Aurelija , Davis Tracy Dawn , Angelopoulos Christos 
Published: July 2019

AbstractThe aim of thisin vitroinvestigation was to evaluate the durability of storage phosphor plates (SPPs) as a digital dental imaging system and to detect the factors that may contribute to possible reduced durability. A total of 140 new SPPs were divided into groups and exposed to the effects of the various handling steps during the image acquisition. An additional group of plates joined the existing plates in the Radiology Clinic and tested the additive effect of all these factors plus the effect of positioning the plates in a patient's mouth. The images resulting from these SPPs were regularly evaluated for the appearance of scratches as a sign of wear and rated by an oral radiologist using a 6 point scale. Although the manufacturer claims the SPPs can be used indefinitely, we found 95% of our plates were rendered non-diagnostic after only 50 uses. The manufacturer's claim for indefinite use of the SPPs seems to be questionable.CitationBedard A, Davis TD, Angelopoulos C. Storage Phosphor Plates: How Durable are they as a Digital Dental Radiographic System? J Contemp Dent Pract 2004 May;(5)2:057-069.
The Effects of Water and Acetone-based Dentin Adhesives on Apical Microleakage
Authors: Bala Oya , Karadag L. Sibel , Türköz Emin , Mihçioğlu Tansev 
Published: July 2019

Abstract
In this study, the aim was to assess the in vitro apical microleakage of a resin-based sealer used with two different adhesives. Thirty nine freshly extracted maxillary incisors were used. The teeth were decoronated at the cemento-enamel junction with a water-cooled fissure bur. Chemo-mechanical debridement of the root canals was accomplished with the step-back technique. The smear layer was removed by 19% ethylenediamine tetra acetic acid (EDTA). The roots were then divided into three experimental groups of thirteen teeth in each. Specimens in group 1 were filled with gutta-percha, AH Plus sealer, and water-based adhesive system (Syntac Single Component). Group 2 specimens were filled with gutta-percha, AH Plus sealer, and acetone-based dentin adhesive (Prime & Bond NT). Specimens of group 3 were filled with only gutta-percha and AH Plus sealer (no adhesive was applied). The teeth were immersed into 2% methylene blue solution. Apical sealing qualities were assessed by measuring the linear dye penetration with a stereomicroscope. Dentin tubule penetration was observed under scanning electron microscopy (SEM). Results showed no statistically significant difference between the materials used, however, the leakage in group 2 was less than group 1 and 3.

Citation
Karadag LS, Bala O, Türköz E, Mihçioğlu T. The Effects of Water and Acetone-based Dentin Adhesives on Apical Microleakage. J Contemp Dent Pract 2004 May;(5)2:093-101.
Evaluation of Changes in the Mandibular Angular Cortex Using Panoramic Images
Authors: Ardakani Fatemeh Ezoddini , Niafar Nasim 
Published: July 2019

Abstract
The mandible like other bones of the body has a series of anatomical landmarks that can serve as radiographic indicators. Using these indicators it is possible to evaluate changes in bone with respect to its quantity or quality by different methods of taking images. Osteoporosis is a significant problem of the elderly, especially postmenopausal women. The aim of this study was to determine the thickness of the mandiublar angular cortex on the right and left sides of women as well as bone resorption in different age groups using panoramic radiography. One hundred female patients were selected from applicants for panoramic radiological services who did not have a history of systemic bone disease, hysterectomy, or taking hormonal supplements.
Using a questionnaire, the selected subjects were asked questions about their education, job, marital status, number of pregnancies, age, menopausal status, and history of backaches. After statistical calculation it became clear an increase in age will increase bone resorption, and this process is related to a decrease in the sexual hormones of women. Higher bone resorption was detected in women with a higher number of pregnancies. Also, the higher educated the patient, the less bone resorption. Women with a background of backaches had more bone resorption to those who did not have this backache background. Finally, it was recognized that it would be possible to clear the quality dimension of the process of mandibular bone resorption.

Citation
Ardakani FE, Niafar N. Evaluation of Changes in the Mandibular Angular Cortex Using Panoramic Images. J Contemp Dent Pract 2004 August;(5)3:001-015.
Treatment of Endodontic Perforations Using Guided Tissue Regeneration and Freeze-Dried Bone Allograft: Two Case Reports with 2-4 Year Post-Surgical Evaluations
Authors: Zenobio Elton Golçalves , Shibli Jamil Awad 
Published: July 2019

Abstract
Clinicians often have difficulty with the diagnosis and treatment of root perforation. This paper reports two patients with root perforation treated with periodontal surgery associated with guided tissue regeneration (GTR) and demineralized freeze-dried bone allograft (DFDBA). This combined treatment resulted in minimal probing depths, minimal attachment loss, and radiographic evidence of bone gain after follow-up evaluations that ranged from 2 to 4 years. These case reports show a correct diagnosis and removal of etiologic factors can restore both periodontal and endodontic health.

Citation
Zenobio EG, Shibli JA. Treatment of Endodontic Perforations Using Guided Tissue Regeneration and Freeze-Dried Bone Allograft: Two Case Reports with 2-4 Year Post-Surgical Evaluations. J Contemp Dent Pract 2004 August;(5)3:131-141.
The Epidemiology, Etiology, and Pathophysiology of Acute Necrotizing Ulcerative Gingivitis Associated with Malnutrition
Authors: Folayan M.O. 
Published: July 2019

AbstractAcute Necrotizing Ulcerative Gingitivitis (ANUG) is a distinct and specific disease. This disease entity has been described as far back as the days of Hippocrates and is known by many synonyms. With the advent of antibiotics and with improved nutritional status, the incidence has decreased and even become extinct in developed countries. However, with the increasing incidence of severe immunodeficiency states such as seen in Acquired Immunodeficiency Syndrome (AIDS) the lesion has once more, become a well recognized and often encountered clinical entity in developed countries. In developing countries, however, the condition is still a commonly diagnosed clinical lesion because of the persistently poor nutritional status. Because of the current campaign for increased focus on global health issues, ANUG, a lesion of significant interest for the developing countries where malnutrition is high and for developing countries because of the AIDS, a global pandemic has resurfaced as a topic for discussions and study. This literature review will provide a better understanding of the epidemiology, etiology, and pathophysiology of ANUG associated with malnutrition.CitationFolayan MO . The Epidemiology, Etiology, and Pathophysiology of Acute Necrotizing Ulcerative Gingivitis Associated with Malnutrition. J Contemp Dent Pract 2004 August;(5)3:028-041.
Resistance of Bonded Composite Restorations to Fracture of Endodontically Treated Teeth
Authors: Daneshkazemi A.R. 
Published: July 2019

Abstract
The aim of this in vitro study was performed to evaluate the effect of dentin bonding agents and glass ionomer cement beneath composite restorations and its resistance to fracture of endodontically treated teeth. Fifty sound extracted maxillary teeth were selected; ten of them for controls and the remainder were modified with root canal treatment and a mesial occlusal distal (MOD) cavity preparation. The modified teeth were then divided into five groups:

Sound teeth
Prepared without restorations for control
Prepared and restored with Vitrebond (3M, USA), Singlebond (3M, USA), and Z100 (3M, USA) resin composite
Prepared and restored with Concise enamel bonding agent (3M, USA) and Z100 resin composite
Prepared and restored using Singlebond and Z100 composite resin

The modified specimens were subjected to compressive load by an Instron machine until fracture occurred. Group 1 showed the highest resistance to compressive force followed by Groups 5, 3, 4, and 2, respectively. Statistical analysis using analysis of variance (ANOVA) and a t-test indicated significant difference between all groups. Use of a dentin bonding agent and composite resin increased the resistance of endodontically treated teeth to fracture.

Citation
Daneshkazemi AR. Resistance of Bonded Composite Restorations to Fracture of Endodontically Treated Teeth. J Contemp Dent Pract 2004 August;(5)3:051-058.
The Effect of Different Lower Third Molar Conditions on the Re-Crowding of Lower Anterior Teeth in the Absence of Tight Interproximal Contacts One-Year Post Orthodontic Treatment: A Pilot Study
Authors: Al-Balkhi Khalid M. 
Published: July 2019

Abstract
The role of lower third molars in lower incisor crowding is a debatable topic. Some believe the presence or eruption of lower third molars is associated with the crowding of mandibular incisors, others negate such association. Thirty-two newly debonded orthodontic patients, with ages ranging from 14-19 years, were randomly selected. No retainers were used for the lower dental arch. Removal of tight interproximal contacts of the lower anterior teeth was created and maintained by periodic abrasive stripping every 2-3 months, if needed. The cases were followed up for one year. Orthopantomographs (OPGs) and study casts were taken at debonding (post-treatment) and at the end of the one year follow up (post retention). Statistical analysis of the lower third molar conditions – erupted, unerupted, or missing with or without sufficient space for their eruption – versus re-crowding of lower incisors was evaluated using Fisher's Exact Test. The results of this pilot study revealed there was no significant correlation between the different conditions of the lower third molars versus lower anterior re-crowding in the absence of tight interproximal incisal contacts; however, a larger sample size is needed to verify such findings.

Citation
Al-Balkhi KM . The Effect of Different Lower Third Molar Conditions on the Re-Crowding of Lower Anterior Teeth in the Absence of Tight Interproximal Contacts One-Year Post Orthodontic Treatment: A Pilot Study. J Contemp Dent Pract 2004 August;(5)3:066-073.
Fixed Prosthetics with a Connective Tissue and Alloplastic Bone Graft Ridge Augmentation: A Case Report
Authors: Breault Lawrence G. , Lee Sung Y. , Mitchell Nicole E. 
Published: July 2019

AbstractAugmentation of the partially edentulous ridge can significantly improve the final prosthodontic rehabilitation. For enhancing soft tissue contours in the anterior region, the subepithelial connective tissue graft is the treatment of choice. The combination of connective tissue grafts with alloplastic bone graft material can optimize the ridge augmentation and reduce post extraction defects. The aim of this clinical report is to describe the use of subepithelial connective tissue in conjunction with an alloplastic bone graft for augmentation of a maxillary anterior ridge prior to prosthetic rehabilitation.CitationBreault LG, Lee SY, Mitchell NE. Fixed Prosthetics with a Connective Tissue and Alloplastic Bone Graft Ridge Augmentation: A Case Report. J Contemp Dent Pract 2004 November;(5)4:111-122.