Dentistry Commons^™

Altering Occlusal Vertical Dimension Provisionally With Base Metal Onlays: A Clinical Report, Soni Prasad, Jennifer Kuracina, Edward A. Monaco, Jr.

School of Dentistry Faculty Research and Publications

This article presents a method for altering occlusal vertical dimension (OVD) to restore dentitions with limited restorative space due to loss of tooth structure. A provisional increase in OVD is achieved using predominately base metal onlays, which offer advantages over conventional techniques. The onlays are resistant to wear, may be bonded well to nonrestored and restored tooth surfaces with resin cements, and provide a fairly reversible method of increasing OVD. A patient situation is presented which demonstrates the use of provisional base metal onlays in complete mouth rehabilitation.

A Technique For Duplicating A Fixed Complete Denture, Soni Prasad, Edward A. Monaco, Jr.

School of Dentistry Faculty Research and Publications

The fixed implant prosthesis often requires repair due to fracture and/or wear of acrylic resin teeth. Repair of such a prosthesis, although simple, requires retaining the prosthesis to be revised in the laboratory. In order to reveneer the implant prosthesis, a provisional restoration should be fabricated for the patient that provides similar function and esthetics. This article presents a technique for duplicating the existing fixed implant-supported prosthesis prior to repair/reveneer, thus providing a smooth transition from the provisional to the definitive prosthesis.

Unusual Ectopic Eruption Of A Permanent Central Incisor Following An Intrusion Injury To The Primary Tooth, Ebru Canoglu, Cenk Ahmet Akcan, Erdinç Baharoglu, H. Cem Güngör, Zafer C. Cehreli

School of Dentistry Faculty Research and Publications

Intrusive luxation of primary teeth carries a high risk of damage to underlying permanent tooth germs. Ectopic eruption of permanent incisors is an unusual outcome of traumatic injury to their predecessors. In this case report, we describe the multidisciplinary management of the consequences of a primary tooth intrusion that led to severe ectopic eruption of the permanent left central incisor in a horizontal position at the level of the labial sulcus.

Effect Of Phosphate Group Addition On The Properties Of Denture Base Resins, Gaurav Puri, David W. Berzins, Virendra B. Dhuru, Periathamby A. Raj, Sameer K. Rambhia, Gunjan Dhir, Andrew R. Dentino

School of Dentistry Faculty Research and Publications

Statement of problem

Acrylic resins are prone to microbial adherence, especially by Candida albicans. Surface-charged resins alter the ionic interaction between the denture resin and Candida hyphae, and these resins are being developed as a means to reduce microbial colonization on the denture surface.

Purpose

The purpose of this study was to investigate the physical and mechanical properties of phosphate-containing polymethyl methacrylate resins for their suitability as a denture material.

Material and methods

Using PMMA with cross-linker (Lucitone 199) as a control, 4 experimental groups containing various levels of phosphate with and without cross-linker were generated. The properties examined …

The Dilemma Of The Open Gingival Embrasure Between Maxillary Central Incisors, Orlando Motohiro Tanaka, Bruno D'Aurea Furquim, Renata Correa Pascotto, Gerson Luiz Ulema Ribeiro, Jose A. Bosio, Hirushi Maruo

School of Dentistry Faculty Research and Publications

Aim: The aim of this report is to present the etiology, diagnosis, and treatment planning strategy in the presence of an open gingival embrasure between the maxillary central incisors.

Background: The open gingival embrasure or “black triangle” is a visible triangular space in the cervical region of the maxillary incisors. It appears when the gingival papilla does not completely fill in the interdental space. The space may occur due to: (1) disease or surgery with periodontal attachment loss resulting in gingival recession; (2) severely malaligned maxillary incisors; (3) divergent roots; or (4) triangular-shaped crowns associated with or without periodontal problems …

Quantification Of The Individual Characteristics Of The Human Dentition: Methodology, L Thomas Johnson, Daniel D. Blinka, Peggy Jean Van Scotter-Asbach, Thomas W. Radmer

School of Dentistry Faculty Research and Publications

This study provides a method for comparing six individual human dentition characteristics using the standard measuring tool in Adobe Photoshop CS2 as compared to measuring individual characteristics with an automated software program under development at Marquette University, which has been adapted for bitemark analysis. The algorithm identifies color-specific pixels and automatically calculates the measurements.

Polymerization Efficiency Of Glass-Ionomer And Resin Adhesives Under Molar Bands, Daniel John Rejman, Theodore Eliades, T. Gerard Bradley, George Eliades

School of Dentistry Faculty Research and Publications

Objective: To determine the degree of cure of a light-cured resin-modified glass ionomer (RMGI) under molar bands compared with a light-cured resin and a dual-cured resin.

Materials and Methods: The 3 cements used were Fuji Ortho LC, Eagle Spectrum resin, and Variolink II dual-cure. Each sample was indirectly light cured for 20 seconds (10 seconds occlusally, 10 seconds cervically) under sections of molar bands, and the degree of cure was evaluated with micro-MIR FTIR spectroscopy.

Results: The RMGI exhibited a significantly higher mean degree of cure (55.31%) than both of the resins (Eagle 19.23%; Variolink II, 25.42%), which did not …

Histologic And Histomorphometric Analysis Of Posterior Region Of The Human Temporomandibular Disc, Luis Eduardo Almeida, Carla S. Baioni, Ana Paula C. Martins, Sergio Roberto P. Line, Lucia Noronha, Paula C. Trevilatto, Antonio Adilson S. De Lima, Marco Antonio De Oliveira Filho, Sergio Aparecido Ignacio

School of Dentistry Faculty Research and Publications

Objective

The aim of this study was to analyze histologic and histomorphometric features of the articular disc in groups with and without disc displacement.

Study design

A sample of 39 temporomandibular joints TMJs (31 case specimens, 8 control specimens) from 28 patients (mean age 31.2 years) were recruited for this study. The patients were considered to be affected and treated surgically with disc repositioning when presenting painful clinical signs of disc displacement after unsuccessful nonsurgical treatment for at least 6 months. Of the control patients, 4 presented condyle fracture which required opening to be reduced for treatment, and 4 displayed …

Activation Of Extracellular-Signal Regulated Kinase (Erk1/2) By Fluid Shear Is Ca2+- And Atp-Dependent In Mc3t3-E1 Osteoblasts, Dawei Liu, Damian C. Genetos, Ying Shao, Derik J. Geist, Jiliang Li, Hua Zhe Ke, Charles H. Turner, Randall L. Duncan

School of Dentistry Faculty Research and Publications

To determine the role of Ca²⁺ signaling in activation of the Mitogen-Activated Protein Kinase (MAPK) pathway, we subjected MC3T3-E1 pre-osteoblastic cells to inhibitors of Ca²⁺ signaling during application of fluid shear stress (FSS). FSS only activated ERK1/2, rapidly inducing phosphorylation within 5 min of the onset of shear. Phosphorylation of ERK1/2 (pERK1/2) was significantly reduced when Ca_i²⁺ was chelated with BAPTA or when Ca²⁺ was removed from the flow media. Inhibition of both the L-type voltage-sensitive Ca²⁺ channel and the mechanosensitive cation-selective channel blocked FSS-induced pERK1/2. Inhibition of phospholipase C with U73122 significantly reduced …

Socio-Demographics Of Adult Orthodontic Visits In The United States, Joseph Whitesides, Nicholas M. Pajewski, T. Gerard Bradley, Anthony Iacopino, Christopher Okunseri

School of Dentistry Faculty Research and Publications

Introduction: Population-based studies in orthodontics have focused on differences between normative and perceived needs. However, information from national data on the prevalence of orthodontic visits and their associated factors in adults in the United States is scarce. We examined the demographic profile of likely adult users of orthodontic services and whether there is racial and ethnic disparity in orthodontic visits. Methods: We analyzed data from the Medical Expenditure Panel Survey, 2000-2004. Results: Overall, about 1% of the population reported an orthodontic visit. Subjects who made a general dental visit during the current year were significantly more likely to also have …

Bond Strength Of An Amorphous Calcium Phosphate–Containing Orthodontic Adhesive, Jeff A. Foster, David W. Berzins, T. Gerard Bradley

School of Dentistry Faculty Research and Publications

Objective: To determine whether an amorphous calcium phosphate (ACP)-containing adhesive has an acceptable level of shear bond strength to be used as an orthodontic adhesive.

Materials and Methods: Sixty extracted premolars were randomly divided into three groups for orthodontic bonding. Group 1 used a composite resin adhesive (Transbond XT), group 2 was bonded with an ACP-containing adhesive (Aegis Ortho), and group 3 used a resin-modified glass ionomer (Fuji Ortho LC). All bonded teeth were stored in distilled water at 37°C for 40 ± 2 hours prior to debonding. Shear bond strength and adhesive remnant index (ARI) were recorded for each …

Hmong Adults Self-Rated Oral Health: A Pilot Study, Christopher Okunseri, Marcie Yang, Cesar D. Gonzalez, Warren Lemay, Anthony Iacopino

School of Dentistry Faculty Research and Publications

Since 1975, the Hmong refugee population in the U.S. has increased over 200%. However, little is known about their dental needs or self-rated oral health (SROH). The study aims were to: (1) describe the SROH, self-rated general health (SRGH), and use of dental/physician services; and (2) identify the factors associated with SROH among Hmong adults. A cross-sectional study design with locating sampling methodology was used. Oral health questionnaire was administered to assess SROH and SRGH, past dental and physician visits, and language preference. One hundred twenty adults aged 18–50+ were recruited and 118 had useable information. Of these, 49% rated …

Hierarchical Cluster Analysis Of Myoepithelial/Basal Cell Markers In Adenoid Cystic Carcinoma And Polymorphous Low-Grade Adenocarcinoma, Manju L. Prasad, Catalin C. Barbacioru, Yeshwant B. Rawal, Omar Husein, Ping Wen

School of Dentistry Faculty Research and Publications

Distinguishing adenoid cystic carcinoma from polymorphous low-grade adenocarcinoma of the salivary glands is important for their management. We studied the expression of several myoepithelial and basal/stem cell markers (smooth muscle actin, calponin, smooth muscle myosin heavy chain, metallothionein, maspin, and p63) by immunohistochemistry in 23 adenoid cystic carcinoma and 24 polymorphous low-grade adenocarcinoma, to identify the most useful marker or combination of markers that may help their diagnoses. The results were analyzed using hierarchical cluster analysis and χ² test for trend. We noted diffuse expression of smooth muscle actin in 20 adenoid cystic carcinoma vs one polymorphous low-grade adenocarcinoma …

Novel Molecules For Intra-Oral Delivery Of Antimicrobials To Prevent And Treat Oral Infectious Diseases, Periathamby A. Raj, Latha Rajkumar, Andrew R. Dentino

School of Dentistry Faculty Research and Publications

New molecules were designed for efficient intra-oral delivery of antimicrobials to prevent and treat oral infection. The salivary statherin fragment, which has high affinity for the tooth enamel, was used as a carrier peptide. This was linked through the side chain of the N-terminal residue to the C-terminus of a defensin-like 12-residue peptide to generate two bifunctional hybrid molecules, one with an ester linkage and the other with an anhydride bond between the carrier and the antimicrobial components. They were examined for their affinity to a HAP (hydroxyapatite) surface. The extent of the antimicrobial release in human whole saliva was …

Presenca De Dentes Permanentes Irrompidos Em Escolares Da Regiao Metropolitana De Porto Alegre, Karine Squeff, Guilherme Pessoa Cerveira, Luciane Quadrado Closs, Jose A. Bosio

School of Dentistry Faculty Research and Publications

Foi realizada uma pesquisa de campo em duas escolas da rede pública estadual de Porto Alegre, com a finalidade de verificar a presença de dentes permanentes irrompidos em crianças com faixa etária entre seis a dez anos. Foram examinadas 327 crianças, considerando as variáveis de idade, sexo e raça. Não foi observada diferença significativa para a época de erupção para as variáveis de raça e sexo. Foi observado que aos seis anos de idade uma porcentagem maior de incisivos inferiores (78,7%) irrompeu antes que os primeiros molares inferiores (75,9%), assim como a erupção na arcada inferior antecedeu a da arcada …

Volume Analysis Of The Proximal Tibial Metaphysis, Kingsley Wang, Luis Eduardo Almeida, Alexis B. Olsson

School of Dentistry Faculty Research and Publications

Purpose

The Vitrea 2 imaging software (Vital Images Inc, Minnetonka, MN) was used for the volume analysis of the proximal tibial metaphysis.

Materials and Methods

Eighteen computed tomography scans of the proximal tibia were processed through the software, and 3-dimensional imaging of the proximal tibia was reconstructed.

Results

The volume and area of the proximal tibia that were generated resulted in a mean area of 127 cm² and a mean volume of 77.2 cm².

Conclusion

This study supports the use of the proximal tibial metaphysis as a source of low to moderate volume of autologous bone. When …

Response To A Retrospective Evaluation Of Crown-Fractured Permanent Teeth Treated In A Pediatric Dentistry Clinic, H. Cem Güngör

School of Dentistry Faculty Research and Publications

No abstract provided.

A Nodular Submental Mass, Yeshwant B. Rawal, Carl M. Allen, John R. Kalmar

School of Dentistry Faculty Research and Publications

A 26-year-old male presented with a 2-month history of a mildly painful, slow growing, nodular mass of the submental region. Examination revealed a 1.5 x 1.0-cm midline swelling of the submental region. The skin over the mass appeared normal. The mass was firm and slightly tender on palpation and appeared to be positioned within the submental space. Intraoral examination did not reveal any obvious pathologic findings and the nearby teeth showed no caries, periodontal disease, or mobility. The patient’s medical history was unremarkable.

Physical Properties Of Denture Base Resins Potentially Resistant To Candida Adhesion, Gunjan Dhir, David W. Berzins, Virendra B. Dhuru, Periathamby A. Raj, Andrew R. Dentino

School of Dentistry Faculty Research and Publications

Purpose: The addition of anionic charge on denture base resins has been shown to inhibit Candida albicans adhesion and to facilitate adsorption of salivary defense molecules. The aim of this study was to evaluate the physical properties of a modified denture base resin for denture fabrication.

Materials and Methods: Specimens made from heat polymerizing resin Lucitone 199 were used as the control group. The two experimental groups, E-10 and E-20, had 10% and 20%, respectively, of the monomer substituted with an experimental phosphate-containing monomer. Flexural strength and modulus, water sorption, solubility, and color stability tests were conducted to ensure compliance …

Management Of Cervical Root Fracture Using Orthodontic Extrusion And Crown Reattachment: A Case Report, Harun Canoglu, H. Cem Güngör, Zafer C. Cehreli

School of Dentistry Faculty Research and Publications

Root fractures involve damage to pulp, cementum, dentin, and periodontal ligaments. These injuries affect 0.5% to 7% of permanent teeth. Cervical root fractures are less frequently seen and have a worse prognosis compared with the fractures in the apical or middle third of the root. This case report describes the treatment of a cervical root fracture in a maxillary central incisor. After removal of the coronal fragment, the root was filled temporarily with calcium hydroxide and orthodontic extrusion was initiated. The remaining root portion was elevated above the epithelial attachment and a successful coronal restoration was made using the natural …

Effect Of Various Curing Lights On The Degree Of Cure Of Orthodontic Adhesives, Markus Niepraschk, Christos Rahiotis, T. Gerard Bradley, Theodore Eliades, George Eliades

School of Dentistry Faculty Research and Publications

Introduction: The purpose of this study was to compare the percentage degree of cure (%DC) of orthodontic adhesive resins irradiated with 3 types of light sources of various intensities: plasma arc, halogen, and light-emitting diode (LED). Methods: Twenty maxillary incisor stainless steel brackets (0.018-in slot) were divided into 4 groups of 5 brackets each. A standardized amount of composite resin was applied to each bracket base, simulating its clinical application. The brackets were light-cured with a halogen light for 20 seconds (10 seconds each from the incisal and cervical bracket edges), an LED light for 20 seconds (10 seconds per …

A Retrospective Evaluation Of Crown-Fractured Permanent Teeth Treated In A Pediatric Dentistry Clinic, H. Cem Güngör, Serdar Uysal, Nil Altay

School of Dentistry Faculty Research and Publications

A retrospective study was carried out on the dental trauma records of 93 patients (55 boys, 38 girls) with 129 crown-fractured teeth. The patients’ average age was 9.57 years (SD 1.57), ranging between 7 and 15 years. Uncomplicated crown facture (comprising enamel–dentin) was the most observed type of injury (n = 107, 83%). Only 15 patients (16.13%) sought treatment in less than 24 h following the injury. Of 41 injured teeth (31.79%) the apices were open at the time of presentation at the clinic. The initial treatment of these injured teeth were interim restoration with acid-etch and composite (69%), …

Shear Bond Strength Comparison Between Two Orthodontic Adhesives And Self-Ligating And Conventional Brackets, Rodney G. Northrup, David W. Berzins, T. Gerard Bradley, William I. Schuckit

School of Dentistry Faculty Research and Publications

Objective: To evaluate and compare the shear bond strengths of two adhesives using two types of brackets: a conventional and a self-ligating bracket system.

Materials and Methods: Sixty extracted human premolars were collected. The premolars were randomly divided into three groups of 20 teeth. All three groups were direct bonded. Groups 1 and 2 used light-cured adhesive and primer (Transbond XT) with a conventional (Orthos) and a self-ligating bracket (Damon 2), respectively. Group 3 used a light-cured primer (Orthosolo) and a light-cured adhesive (Blūgloo) with a self-ligating bracket (Damon 2). The specimens were stored in distilled water at 37°C for …

Root Fracture In Immature Tooth: Report Of A Case, H. Cem Güngör, Bülent Büyükgüral, Serdar Uysal

School of Dentistry Faculty Research and Publications

Root fracture injuries affect 0.5–7% of permanent teeth. Although this type of injury is rarely seen in teeth with immature root formation, the prognosis is generally good depending on the site of the fracture. A case report of horizontal root fracture in maxillary central incisor of an 8-year and 3-month-old girl and its treatment was presented.

Myopericytoma Of The Oral Cavity, Vivekanand Datta, Yeshwant B. Rawal, Harry H. Mincer, Mark K. Anderson

School of Dentistry Faculty Research and Publications

Background.

Myopericytoma is a rare mesenchymal neoplasm of pericytic cells demonstrating myoid differentiation. The lesion typically arises within the subcutaneous tissue of the extremities. We report a case that, to the best of our knowledge, is the first case of myopericytoma involving the soft tissue of the oral cavity.

Methods.

A 36-year-old woman had a 5-mm sessile, whitish-pink, firm tongue nodule. The patient underwent excisional biopsy, and histopathologic examination as well as immunohistochemical analysis were performed.

Results.

The differential diagnosis by histologic analysis included solitary fibrous tumor, myofibroma, glomus tumor, and myopericytoma. The results of immunohistochemical analysis, when combined with …

Traumatic Neuroma Following Sagittal Split Osteotomy Of The Mandible, R. H. Kallal, F. G. Ritto, Luis Eduardo Almeida, D. J. Crofton, G. P. Thomas

School of Dentistry Faculty Research and Publications

A 16-year-old male underwent bilateral sagittal split osteotomy of the mandible to correct a mandibular deficiency. Twenty-one years later, a routine panoramic radiograph revealed a radiolucent lesion on the left side of the mandible. The lesion was biopsied. As the patient did not have symptoms and the lesion was connected to the inferior alveolar nerve, the lesion was not totally excised in order to preserve nerve function. The histological features were consistent with traumatic neuroma, and no further surgical procedure was planned.

Thermal Analysis Of As-Received And Clinically Retrieved Copper-Nickel-Titanium Orthodontic Archwires, Matthew C. Biermann, David W. Berzins, T. Gerard Bradley

School of Dentistry Faculty Research and Publications

Objective: To compare as-received copper-nickel-titanium (CuNiTi) archwires to those used in patients by means of differential scanning calorimetry (DSC). Also, the thermal or phase properties of 27°C, 35°C, and 40°C CuNiTi archwires were studied to ascertain if their properties match those indicated by the manufacturer.

Materials and Methods: Six wires of 27°C, 35°C, and 40°C CuNiTi were tested as-received, and six each of the 27°C and 35°C wires were examined after use in patients for an average of approximately 9 and 7 weeks, respectively. Segments of archwire were investigated by DSC over the temperature range from −100°C to 150°C at …

Immediate Surgical Repositioning Following Intrusive Luxation: A Case Report And Review Of The Literature, H. Cem Güngör, S. Burcak Cengiz, Nil Altay

School of Dentistry Faculty Research and Publications

This report presents a case of severe intrusive luxation of mature maxillary lateral incisor in a 10-year-old boy. The intruded tooth was immediately repositioned (surgical extrusion) and splinted within 2 h following injury. Tetracycline therapy was initiated at the time of repositioning and maintained for 10 days. Pulp removal and calcium hydroxide treatment of the root canal was carried out after repositioning. Splint was removed 1 month later. Definitive root canal treatment with gutta percha was accomplished at the second month recall. Clinical and radiographic examination 28 months after the surgical extrusion revealed satisfactory apical and periodontal healing.

Buccal And Palatal Talon Cusps With Pulp Extensions On A Supernumerary Primary Tooth, Esin Siraci, H. Cem Güngör, Zafer C. Cehreli, B. Taner

School of Dentistry Faculty Research and Publications

This paper reports an unusual occurrence of talon cusp on a supernumerary primary incisor, presenting on both labial and palatal sides. The tooth was scheduled for extraction due to its interference with the occlusion. Morphometric analysis of the taloned cusps was performed on digitized replicas of the tooth crown using open-source image analysis toolkit (ImageJ). Further non-destructive investigation of the taloned crown under cone-beam X-ray computed tomography revealed pulpal extensions in both talon cusps.

Porcelain Surface Roughness, Color And Gloss Changes After Orthodontic Bonding, Jacob Jarvis, Spiros Zinelis, Theodre Eliades, T. Gerard Bradley

School of Dentistry Faculty Research and Publications

The purpose of this study was to evaluate the alteration in surface characteristics after orthodontic debonding of two types of porcelain systems commonly used in prosthetic dentistry. For this purpose, porcelain specimens were fabricated from low-fusing (n = 20) and high-fusing (n = 20) porcelain. The baseline surface roughness, color, and gloss were evaluated using profilometry, color shade index, and gloss study. All specimens were bonded with brackets and debonded using a testing machine at a rate of 0.1 mm/minute crosshead speed. The porcelain surfaces were polished using a 12-fluted carbide composite removal bur (low-fusing, n = 20; high-fusing, n …