This diploma thesis is dealt with stress-strain analysis of jowl with teeth implants. Teeth implants when locked in place (jowl) have the ability to replace and be used in the same way as the missing teeth. The implant creates a pillar column in the buccal cavity and then the tooth cap or bridge is secured on the pillar column. In this diploma thesis it is described as a solution of stress and strain of two types of cylindrical teeth implants VNI. Thesis specializes on the influence of deviation implant from the vertical axis. The solution is accomplished in program ANSYS Workbench by Finite Element Method (FEM). The geometric models are made in program SolidWorks 2005.

This diploma thesis is oriented on a stress – strain analysis of the jaw bone with a screw dental implant. There is a literature search on this theme in the beginning of this work. Solutions deformation and stress the system lower jaw and implant was performed computational modeling, by using the finite element method. Modeling is part of the lower jaw with dental implants applied screw type Ankylos, Bränemark and implant with metric thread. The thesis is described in detail development of calculation model system and solutions. To create a geometry model of geometry Solidworks 2007 was used. To create calculation model and the solution was implamented in the computer systém ANSYS 11.0 and ANSYS Workbench.

This thesis deals with a CAD programmed construction design of dental prosthetics and its subsequent production by means of a five axis machine tool. In the theoretical part of the thesis one can find characteristics and analysis of materials designed for a production of dental prosthetics constructions. Among other things, the practical part of the thesis follows up digitization of a patient´s oral cavity part with the use of Trios intraoral scanner representing the latest scanning technology. The obtained data created a basis for a design of the respective dental prosthetics construction using the shape dental system programme called DentalDesigner 2015. Furthermore, the paper deals with a production of a dental prosthetics construction by means of a five axis machine tool and pursues completion works which resulted in the prosthetics final shape. The paper is concluded with discussion comprising a summary of results acquired in the practical part beginning from dental implant introduction to insertion of the made prosthetics construction into the patient´s oral cavity.

Les objectifs de cette thèse étaient de1/ carctériser la douleur post-opératoire chez des patients ayant reçu un implant dentaire mandibulaire. 2/examiner la relation entre facteurs individuels, facteurs chirurgicaux et douleurs post-operatoire chez patients ayant reçuun implant dentaire mandibulaire. 3/déterminer les incidences de la douleur neuropathique chez des patients ayant reçu un implant dentaire mandibulaire.Cette thèse a montré que la douleur post-opératoire aigüe après un implant dentaire allait d'une intensité douce à modérée((inférieur à 3 sur l'échelle visuelle analogique) et de courte durée. Une anlyse univariée a montré que l' intensité de la douleur post-operatoire était en lien avec l'âge, le souvenir de la douleur ayant fait suite à une précédente chirurgie orale, le nombre d'implants et la distance entre la fraise et le canal neurologique alvéolaire inférieur(IAN). En revanche aucun lien n'a été démontré avec le sexe, des facteurs psychologiques ou le procédé chirurgical. Une analyse multivariée a montré une association significative entre une douleur post-opératoie aigüe et la distance entre l'implant et le canal neurologique alvéolaire inférieur mémoire de la douleur après une précédente chirurgie orale. / This prospective study investigates the clinical characteristics and time course of postoperative pain after placement of dental implants in the mandible over a 6-month period. We also examined the influence of preoperative physical and psychological factors, as well as surgical factors, on acute postoperative pain. Postal questionnaires built to assess the existence neuropathic features of pain at the site of surgery (with the Douleur Neuropathique 4 Questions [DN4]) were sent two weeks, and one, three and six months after surgery.Acute postoperative pain was of mild-to-moderate intensity and had a short duration. Univariate analyses showed that the intensity of postoperative pain was related to age, remembrance of pain after a previous oral surgery, the number of implants, and the distance between the drill and the inferior alveolar nerve (IAN) canal. But, there was no relationship with gender, psychological factors, or surgical procedure (buccal flap). Besides the number of implants (P=0.013), and the distance between the end of the drill and the IAN canal (P=0.004), multivariate analyses showed a significant interaction between the acute postoperative pain and: i) the distance between the implant and the IAN canal (P=0.0005), ii) remembrance of pain after a previous oral surgery (P=0.003), iii) previous oral surgical pain (P=0.005). Among the patients who completed follow-up, only 0.7% (n = 1) scored positive on neuropathic symptoms (DN4 ≥ 3).This prospective observational study provides the characteristics of acute postoperative pain after placement of dental implants in the mandible and the risk factors for developing severe oral postoperative pain. It also provides the incidence rate of neuropathic pain occurring within the 6 months after dental implant surgery.

Title: System to support decission making in dental implantology - quality of life of patients with dental implants Author: MUDr. Pavel Kříž Department: Paediatric Stomatology of 2nd Medical School and Faculty Hospital Motol, V Úvalu 84, 150 06 Prague 5 Supervisor: Prof. MUDr. Taťjana Dostálová, DrSc., MBA Supervisor's e-mail: tatjana.dostalova@fnmotol.cz Dental implants are the method of choice in the treatment of missing tooth/teeth replacement. Implant therapy must be preceded by a detailed examination and the overall treatment plan. As an aid for decision-making for dentists was created decision-making scheme, which gradually, logically and schematically guides the dentists in this particular situation. Health is closely related to the quality of life. Our work evaluates the oral health-related quality of life (OHRQoL) of patients with dental implants. The aim of our study was to determine whether treatment with a dental implant(s) improve(s) OHRQoL. We created a questionnaire to determine the quality of life before and after implantation. In our study, we evaluated only patients who were treated by the only one implantological system to eliminate the influence of other systems on the quality of the results of the study; we evaluated a total of 297 implants. It was assessed a total of 97...

It was the aim of this 24-mo randomized controlled clinical trial to investigate whether the survival of a single median implant placed in the edentulous mandible to retain a complete denture is not compromised by immediate loading. Secondary outcomes were differences in prosthetic complications between the loading principles. Each of the 158 patients who received an implant was randomly assigned to the immediate loading group (n = 81) or the delayed loading group (n = 77). Recall visits were performed 1 mo after implant placement (for only the delayed loading group) and 1, 4, 12, and 24 mo after implant loading. Nine implants failed in the immediate loading group, all within the first 3 mo of implant loading, and 1 implant failed in the delayed loading group prior to loading. Noninferiority of implant survival of the immediate loading group, as compared with the delayed loading group, could not be shown (P = 0.81). Consistent with this result, a secondary analysis with Fisher exact test revealed that the observed difference in implant survival between the treatment groups was indeed statistically significant (P = 0.019). The most frequent prosthetic complications and maintenance interventions in the mandible were retention adjustments, denture fractures, pressure sores, and matrix exchanges. There was only 1 statistically significant difference between the groups regarding the parameter “fracture of the denture base in the ball attachment area” (P = 0.007). The results indicate that immediate loading of a single implant in the edentulous mandible reveals inferior survival than that of delayed loading and therefore should be considered only in exceptional cases (German Clinical Trials Register: DRKS00003730).

Implant dentistry has emerged as a very reliable and predictable option for replacing missing teeth. Implant education at the pre-doctoral level has been implemented in most parts of the world and is currently perceived as a fundamental discipline in dental education. Dental graduates today are expected to have knowledge and possess skills at the competence level in order to provide care for the growing number of patients seeking this treatment option, which may be the optimal option for the majority of their cases. However, very little is known about current trends, issues, and perspectives of implant dentistry education. This study builds a knowledge base about implant dentistry education in pre-doctoral dental education programs. It begins with an overview of the current state of implant dentistry education described in Chapter 1. Chapter 2 evaluates faculty perception in Kuwait University Faculty of Dentistry regarding case-based-learning, a pedagogy that has been recommended by multiple dental education institutions as the context within which pre-doctoral implant dentistry education should be taught. Chapter 3 presents an example of how case-based-learning pedagogy might be implemented in the form of a case report. Chapter 4 creates the link between faculty perception and student outcomes and presents an evaluation of students' competence level regarding pre-doctoral implant education. Finally, Chapter 5 provides a summary and synthesis of the three articles with a focus on placing this research within the larger body of scholarship on implant education and on identifying implications for policy, future scholarship, and practice.

Indiana University-Purdue University Indianapolis (IUPUI) / The objective of this study was to evaluate the in vivo performance of the hydroxyapatite (HA) coating and hydrofluoric acid (HF) etching zirconia (ZrO) implants and to compare the result with titanium (Ti) implants treated in a similar manner. A total of four different implant types were tested in this study. Threaded zirconia implants with HA coating (Test 1) and zirconia implants with HF-treated surfaces (Test 2) were used to compare to the same size of titanium implants treated in identical fashion (control 1 and control 2). All implants measured about 3.5 mm at the thread diameter and 7.0 mm in total length. Each rabbit received two zirconia and two titanium implants treated in the same manner (either HA-coated or HF-etched). The samples were implanted into the rabbit tibias and retrieved at 6 weeks. Upon retrieval, 24 specimens (6 samples for each group) were fixed and dehydrated. The samples were then embedded undecalcified in PMMA for histomorphometry to quantify the bone-to-implant contact (BIC). Another 24 samples were kept in 0.9% saline and were evaluated using removal torque (RT) analysis to assess the strength of the implant-to-bone interface. The histomorphometric examination demonstrated direct bone-to-implant contact for all four groups. HA particle separation from the implants surface was seen in a majority of the HA-coated samples. No signs of inflammation or foreign body reaction were found during examination. Due to the HA particle smear contamination in the ZrO-HA group, no data was collected in this group. The mean BIC at the first three threads of the Ti-HA, Ti-HF and ZrO-HF were 57.78±18.22%, 46.41±14.55% and 47.41±14.05%, respectively. No statistically significant difference was found pair-wise among these three groups. When comparing the BIC data with the machined-surface implants, a statistically significant difference was found between the Ti-HA versus Ti implant group and the Ti-HF versus Ti implant group. The mean bone area (BA) at the first three threads for Ti-HA, Ti-HF and ZrO-HF showed statistically significant difference (p<0.05) between the ZrO-HF and Ti-HA groups, favoring the ZrO-HF group. The value of the peak removal force could only be collected from the Ti-HA group during the removal torque test. The mean RT value for the Ti-HA group was 24.39±2.58 Ncm. When comparing the RT result with our pilot study using machined-surface implants, the Ti-HA group showed statistically significant (p<0.05) higher values than the machined-surface Ti implants. The result of this study proves the in vivo biocompatibility of all four implant types tested. In the three measurable implant groups, the histomorphologic analysis showed comparable osseointegration properties in this animal model.

No description available.

Biomaterials may be any class of material that aids in the regeneration, replacement, or augmentation of damaged tissues. The design of biomaterials is becoming increasingly sophisticated as new technologies enable the manufacture and incorporation of smaller components and structural features. Thus, a demand for equally sophisticated tools and methods to study biomaterials are necessary. Two such tools are X-ray micro-computed tomography (micro-CT) and electron microscopy. Micro-CT has the advantage of imaging materials in 3D and non-destructively, but cannot reach the same resolving power as electron microscopy. However, electron microscopy has limited application with biomaterials due to destructive sample preparation requirements. The advantages and limitations of each imaging technique presents a complementary relationship between the two. This thesis aims to develop and apply a complementary workflow using X-ray and electron microscopy to investigate two diverse biomaterials: a titanium dental implant, and collagen tissue scaffold. In a pilot study, a 3D printed titanium dental implant with a novel dual-stemmed design was investigated for its biocompatibility in vivo. Dual-stemmed and conventional conical implants were inserted into the tibia of New Zealand White rabbits for 3 and 12 weeks, then retrieved with surrounding bone. The implants were analyzed using micro-CT, electron microscopy, and histology. Active bone growth and remodelling around the dual-stemmed implant at both time points was observed. Comparative bone-implant contact indicated the dual-stemmed implants supported bone-implant integration, and demonstrates the comparable biocompatibility of these 3D printed stemmed implants in rabbits up to 12 weeks. In a separate study, a gold functionalized collagen scaffold for tissue engineering applications has been developed. This scaffold design is intended for improved detection of scaffold degradation behaviour in vivo using X-ray CT. In this thesis, micro-CT and electron microscopy were used to analyze the resultant scaffold structure after fabrication, as it is important for understanding the outcomes of in vivo experiments. Imaging revealed a highly heterogeneous structure at both the micron and nanometer length scales. Interconnected pores from 50 – 400 μm made up 80% of the scaffold volume, while gold nanoparticles and agglomerates ranging from 16 – 1000 nm were non-uniformly dispersed at the nanoscale throughout the collagen matrix. This work highlights how complementary X-ray and electron microscopy can be applied to characterize diverse biomaterials during developmental and pre-clinical phases. / Thesis / Master of Applied Science (MASc) / The continued development of next generation biomedical materials, otherwise known as biomaterials, is in part dependant on the resources and technology that exist to drive manufacturing, characterization, and testing. Biomaterials are being designed and controlled at length scales smaller than the diameter of a single hair, and therefore specialized tools are required to accurately investigate and characterize these new designs. Two such tools are X-ray and electron microscopy, which can be used to image and understand three-dimensional biomaterials non-destructively, and with high resolution, respectively. However, both imaging techniques struggle to provide both. This thesis aims to develop and apply a complementary workflow using X-ray and electron microscopy to investigate two diverse biomaterials: a titanium dental implant, and collagen tissue scaffold, with high resolution, and in three dimensions.