Dentistry Commons^™

Periodontal Ligament Reaction Associated With Two Methods Of Dowel Space Preparation, Eugene Charles Hanson

Master's Theses

No abstract provided.

Histopathologic Evaluation Of Conventional And Giromatic Methods Of Canal Preparation On Pulp Stump And Periapical Tissues, Gerald Daniel Gray

Master's Theses

No abstract provided.

The Functional Stress Analysis Of Post Reinforcement, Robert V. Bravin

Loma Linda University Electronic Theses, Dissertations & Projects

Research was undertaken in order to functionally test the reinforcement capabilities of several commonly used, standard manufactured posts. One hundred and ten maxillary lateral incisors were mounted in plastic, reinforced with the posts at different levels, and then restored with standardized crowns. These teeth along with control groups, were then placed in a custom, mounting jig which properly positioned them for the stress testing. The forces required for fracturing these teeth were recorded and subsequently analyzed.

The statistical analysis of the experimental results demonstrated that posts do not reinforce teeth as supposed; they may, in fact, weaken them. Analysis also …

Histology Of Apical Tissue : A Comparative Study Of Sargenti Formula, Short Vs. Overfill, James G. Schulze

Loma Linda University Electronic Theses, Dissertations & Projects

Four Stump-tail monkeys (Macaca spiciosa) were used for this study to analyze, on a cellular level, the apical tissue of teeth overfilled versus teeth filled short 1-3 mm. of the radiographic apex with the Sargenti formula. In each animal four incisors were filled short and four incisors were overfilled. A final sample size consisted of 28 teeth. The time periods ranged from 48 hours to 120 days. After analysis of the histology it can be stated that the teeth filled short showed no inflammation to moderate inflammation in the periapical tissues. In teeth overfilled there was a range from moderate …

Determination Of Lead Content In Apical Tissue Following Root Canal Obturation With Sargenti's Formula, G. Merle Hickok

Loma Linda University Electronic Theses, Dissertations & Projects

Four Stump-tail monkeys were used to help determine if the lead in Sargenti's formula diffuses out into the apical tissue while confined entirely within the root canal. In each animal two teeth were filled with Sargenti's formula 1-2 millimeters short of the radiographic apex, and two teeth were filled with gutta percha and Proco-Sol sealer for controls, making a total sample size of sixteen. The time ranged from 48 hours to 120 days. Lead analysis using the spectrophotometric method showed a higher lead content in the teeth filled with Sargenti's formula than with the gutta percha controls.

A Clinical Comparison Of The Effectiveness Of Two Intracanal Medicaments, Xp-7/Prednisolone And 1% Pcp/Prednisolone, In Reduction And Duration Of Post-Treatment Pain, Kenneth G. Whitnack

Loma Linda University Electronic Theses, Dissertations & Projects

This study was undertaken to determine which intracanal medication, 1% aqueous parachlorophenol with prednisolone or XP-7 with prednisolone was the most effective in reducing the severity and duration of post-treatment pain following initial, conventional endodontic therapy. The investigation was conducted by five endodontists in their private offices and utilized a double-blind technique.

The postoperative reactions of 343 patients were examined statistically. It was shown that there was no statistically significant difference in the reduction or duration of post-treatment pain with either drug. Other factors such as sex, age, location of tooth and presence of a radiographic lesion were statistically significant …

An Evaluation Of The Cytotoxicity Of Root Canal Filling Materials On Tissue Culture Cells In Vitro: Grossman's Sealer, N2 Permanent, Rickert's Sealer, And Cavit, Donald D. Antrim

Loma Linda University Electronic Theses, Dissertations & Projects

An in vitro study using radioactively-labeled tissue culture cells was conducted over a seven-month period on Grossman's sealer, Rickert's sealer, N₂ Permanent, and Cavit to determine the lasting and relative tissue toxicity of these materials.

From this study it was observed that all materials possess lasting tissue toxicity. When relative toxicity is considered, Grossman's is the most toxic, followed by N₂, Rickert's and Cavit in descending order of toxicity. Both Grossman's and N₂ would be considered highly toxic, with Rickert's displaying moderate toxicity. Cavit would be considered mild to moderate in toxicity.

The use of radioactively-labeled …

Bone Regeneration Over Submerged Dental Roots In Dogs, Roger Lee Plata

Loma Linda University Electronic Theses, Dissertations & Projects

Nonendodontically treated roots were submerged 1.5 to 2.0 mm. below the alveolar crest in three dogs. Twelve roots were treated in this manner. Regeneration of alveolar bone can be seen in three weeks with complete bone coverage in five weeks. A complete lamina dura can be seen around the amputated roots.

Bone failed to regenerate over two of the twelve roots. In one case there was delayed healing due to the early loss of some sutures. A sinus tract developed connecting the oral environment with the contents of the pulp. This led to bone resorption and a necrotic pulp. In …

Histological Comparison Of Human Pulpal Tissue Reactions After Vital Partial Pulpectomies Using N-2, Dycal And Zoe Paste, David P. Clark

Loma Linda University Electronic Theses, Dissertations & Projects

A histological comparison of forty-four human teeth in which vital partial pulpectomies were performed, and the pulp stumps covered with dycal, N-2 and ZOE was carried out. The time interval at which the teeth were extracted for study was ten, twelve and fourteen weeks. These teeth were on patients twelve through seventeen years of age and were to he extracted for orthodontic purposes. The teeth were caries free, vital and asymptomatic. The percent retaining vital tissue, time intervals and type of paste were as follows:

• 14 week, dycal 75%
• 14 week, N-2 100%
• 12 week, ZOE 30%
• 12 week, N-2 …

The Lasting Antimicrobial Qualities Of Three Root Canal Sealing Materials : Grossman's Sealer, Rickert's Sealer, And N2 Permanent, Lee R. Ingersoll

Loma Linda University Electronic Theses, Dissertations & Projects

An in vitro study using polyethylene tubes filled with Grossman's sealer, Rickert's sealer, and N2 permanent was conducted over a six month period in an effort to determine their lasting antimicrobial properties against eight different microorganisms.

From the study it was observed that N2 permanent possesses a long-lasting antimicrobial effect, but this effect appears to diminish greatly with time. Further investigation is needed to determine whether or not the effect is actually permanent in nature. The N2 permanent was also shown to have broader antimicrobial effectiveness against the eight microorganisms tested. N2 permanent produced zones of inhibition against five of …

Histologic Comparison Of Apical Tissue Response To Endodontic Overfills With Gutta Percha And Grossman's Sealer Vs. Sargenti Method (N₂), Donald L. Brewer

Loma Linda University Electronic Theses, Dissertations & Projects

This study compared endodontic overfills of N₂ and gutta percha-Grossman's Sealer from a histopathological basis. The study employed four male rhesus monkeys and a sample of 31 teeth.

The most obvious difference between the samples filled with N₂ and the gutta percha-Grossman's Sealer samples was the recurring presence of ankylosis in the N₂-treated teeth. Results also included bone necrosis, inflammation and root and bone resorption.

The N₂ samples were considered to have evidenced greater violence of reaction apically.

Viability Of Dentin In Rats Incisors : Fluid Movement In Pulpless, Endodontically Treated, And Normal Teeth In Rats, Maria Luisa Canales

Loma Linda University Electronic Theses, Dissertations & Projects

It is a well established fact that there is a fluid transport system through the dentin, however to the present time very little has been done regarding this system in teeth that have been endodontically treated.

The present work was conducted in vivo using the lower incisors of rats as the medium for the study.

A selected number of Sprague Dawley rats (36 animals), whose average age was 60 days, and whose body weight averaged about 180 grams, were given an anesthetic of Sodium Pentabarbitol, .05 to .07 ml. per 100 grams body weight. This anesthetic was injected intraperitoneally.

The …

A Study Of The Evaluation Of Various Techniques And Materials In The Obturation Of Lateral And Accessory Canals, Allen E. Flans

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this investigation was to test the effect of different types of condensation, irrigants, filling materials and techniques, and variations in root canal preparation, on the success of sealing lateral and accessory canals, whose presence was determined before hand, and to relate certain inherent anatomic and morphologic characteristics of these canals to the amount of sealing obtained. Seventy-three teeth containing 85 lateral canals were instrumented and irrigated with either NaOCl, NaOCl-RC Prep or saline. The filling materials used were gutta percha, softened and unsoftened and Cavit. Half the teeth were filled using sealer. Final radiographs were studied for …

The Clinical Efficacy Of Cavit, Eric J. Herbranson

Loma Linda University Electronic Theses, Dissertations & Projects

This paper was undertaken to study the use of Cavit an[sic] an endodontic filling material.

Part I examines the physical and biological properties of Cavit. This material has a 14% linear setting expansion, which results in a very tight interphase seal. It is theorized that this type of seal in connection with a three dimensional obturation is necessary to prevent the flow of irritant from the oral environment to the periapical tissue.

The biological properties are tentatively shown to be similar to ZOE.

A description of the use of Cavit in various clinical situations is included.

Part II is a …

Your Teeth Can Be Saved By Endodontic Treatment (1973), American Dental Association, American Association Of Endodontists

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Endodontic Sealing Properties Of Cavit, Chloro-Rosin Gutta Percha, N2, And Silver Cones Using Radioisotopes, Frank H. Beal

Loma Linda University Electronic Theses, Dissertations & Projects

The main purpose of this investigation was to test the endodontic sealing abilities of silver cones, N2, warm gutta percha, chemically softened gutta percha, laterally condensed gutta percha and Cavit under carefully controlled conditions. Evaluations were done by radiographic, macroscopic, microscopic, and autoradiographic examinations.

The four points which must be considered when evaluating the efficacy of sealing root canal systems, in vivo, were presented and discussed.

Cavit as a total endodontic filling material was presented, investigated and discussed.

An improvement of the chloro-rosin - gutta percha diffusion technique was presented.

The concept of surface as well as marginal leakage was …

The Effects Of A Topically Applied Anti-Inflammatory Agent On Root Resorption In The Replanted Teeth Of Canines, William L. Young

Loma Linda University Electronic Theses, Dissertations & Projects

Root resorption is a constant finding on the roots of replanted teeth. In this study it was suggested that root resorption is perhaps related to inflammation and that teeth incubated in an anti-inflammatory agent such as triamcinolone acetonide, a corticosteroid, before replantation would have less resorption. To investigate this hypothesis nineteen mature teeth in five mongrel dogs were extracted and replanted. Ten of the teeth were incubated for five minutes in the steroid and nine control teeth for the same period in a saline solution. Before euthanizing the animals at one, three, five, and seven weeks, a clinical evaluation of …

Histopathological Variations Of Periapical Granulomas And Radicular Cysts, Thanapen Kanchanasut

Loma Linda University Electronic Theses, Dissertations & Projects

The periapical dental granuloma and cyst is the most frequent sequela of pulpitis. These lesions are always intraosseous and often become quiescent after the acute phases are over, forming a space which primarily consists of chronic inflammatory tissue. This chronic inflammatory tissue usually appears as a one-centimeter area of punched out bone on the x-ray film and is referred to as a dental granuloma. Should epithelium choose to proliferate in this inflammatory area, it may undergo subsequent cystic degeneration forming the typical periapical cyst. While much has been written with regard to the etiology and treatment of the apical cyst …

The Rationale Of Apical Resection In Retrofilling Procedures, Raleigh R. Cummings

Loma Linda University Electronic Theses, Dissertations & Projects

Extracted human teeth were used in a study to determine the affect of an apical resection on the elimination of accessory canals and apical ramifications. The apices of 60 roots were resected 2 to 3 mm, an undercut slot preparation was fashioned and retrofillings of Cavit, zinc oxide and eugenol, and amalgam were placed. The identical procedure was carried out on another group of roots, except the apices were slightly beveled to the labial without any significant resection.

The apical portion of all the roots were immersed to the midroot level in methylene blue dye and subsequently dried. An examination …

The Effectiveness Of Camphorated Paramonochlorophenol, Metacresyl Acetate, And Prednisolone In Combination As An Antimicrobial Agent, Maurice Cutler

Loma Linda University Electronic Theses, Dissertations & Projects

Post-treatment discomfort following endodontic procedures can be caused by inflammation due to injudicious use of intracanal medicaments. Camphorated paramonochlorophenol, metacresyl acetate, and prednisolone in combination is advocated to reduce the inflammatory potential of the germicide and thus reduce the occurrence of post-operative pain. It is imperative that a medicament retain antimicrobial activity while reducing inflammatory potential.

This investigation was undertaken toward determining on an in vitro quantitative bactericidal versus bacteriostatic basis by use of the broth dilution test tube method whether camphorated paramonochlorophenol, metacresyl acetate, and prednisolone in combination retains antimicrobial activity comparable to selected other commonly used nonspecific germicides. …

Histopathological Response Of The Human Tooth To An Intrapulpal Pin Implantation, Raymond W. Dolph

Loma Linda University Electronic Theses, Dissertations & Projects

This investigation was designed to serve as a research project directed toward the study of histopathological response of human teeth to the intentional implantation of threaded, stainless steel, gold plated pins into the vital pulp.

Pins of several types are currently used in several aspects of restorative and periodontal dentistry. In some cases there may be unintentional perforation of the dental pulp. In other cases it may be advantageous to purposely perforate the pulp for added retention. The purpose of this research is to help determine the reaction, possibilities, and prognosis of such technique.

Human teeth selected for experimental and …

Correlation Of The Actual Position Of The Root Canal Filling In Human Teeth To Its Apparent Location On The Radiograph, Dominic J. Niccoli

Loma Linda University Electronic Theses, Dissertations & Projects

Human teeth mounted in individual plaster blocks were studied to determine the actual location of the root canal filling when it appears to be exactly at the radiographic apex. The original sample consisted of 109 teeth treated during endodontic technique class by junior dental students at Loma Linda University. In the most ideal manner possible, these teeth were radiographed on a flat surface with the x-ray tube perpendicular to the film and blocked tooth.

Five dentists examined the radiographs, and each one independently listed the canals he judged filled exactly to the radiographic apex. The investigator sorted out the choices …

The Effect Of Removing The Crevicular Epithelium Upon Canine Tooth Replantation, Leon A. Leonard

Loma Linda University Electronic Theses, Dissertations & Projects

The nature of epithelium and the remarkable facility with which it aggressively covers granulation tissue, suggests that removal of the sulcular epithelium surrounding the extraction wound of a tooth to be replanted could promote reattachment of the periodontal tissues at a more nearly ideal coronal level. To investigate this hypothesis twenty mature teeth in five mongrel dogs were experimentally replanted. One half of them were replanted in alveoli around which the crevicular epithelium had been removed, the remaining teeth without creviculoectomy acting as controls. Animals were euthanized at one, two, three, five, and sixteen weeks. After clinical evaluation of the …

Your Teeth Can Be Saved By Endodontic Treatment (1962), American Dental Association, American Association Of Endodontists

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Your Teeth Can Be Saved By Endodontic Treatment (1962), American Dental Association, American Association Of Endodontists

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Dental X-Rays And Your Health (1958), American Dental Association

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Elimination Of Pain In Cavity Preparation, Albert N. Weinzierl

Bachelors’ Theses

It is pain and fear of pain that vacates the dental chair. We may use every means at our command to gain our objective with nothing but mediocre success so long as the spectre of pain confronts the patient. In spite of the fact that people of today are more dental minded, the percentage of adequately cared for mouths is negligible. Various reasons have been offered as to why the dental profession fails to attract a larger and more earnest clientele. The lack of dental prestige, the lack of appreciation by the laity of the vital importance of mouth care …

Pulp Capping, Albert C. Wild

Bachelors’ Theses

Pulp capping may be best defined as the conservative treatment of pulps by means of soothing and antiseptic medicaments, or agents for the purpose of retaining the tooth if at all possible.