Chris C L Wyatt

• University of British Columbia

Purpose : To evaluate the linear and volumetric dimensional changes that occur throughout the fabrication process of monolithic 4.5‐6% yttria‐stabilized zirconia copings under the influence of different preparation designs and two sintering protocols. Materials and Methods : A titanium master die was fabricated using Atlantis core file implant‐abu...

Statement of problem: Although in vitro studies have investigated the accuracy of virtual interocclusal records, clinical research on their ability to register virtual dental casts accurately is lacking. Purpose: The purpose of this clinical study was to evaluate the accuracy and reproducibility of the virtual interocclusal records of an intraor...

Objective As a result of advancements in chairside technology and speed sintering techniques and increased esthetic demands of patients, efforts have been made to produce monolithic zirconia restorations that are highly translucent, strong, and dense. While methods for processing zirconia are well known, there is a tendency to modify the process pa...

Purpose The marginal fit is an essential component for the clinical success of prosthodontic restorations. The aim of this study was to investigate the influence of different abutment finish line widths and crown thicknesses on the marginal fit of zirconia crowns fabricated using either standard or fast sintering protocols. Materials and Methods S...

Statement of problem: Evidence on the accuracy and reproducibility of the virtual interocclusal registration procedure and recommendations as to how to make a virtual interocclusal record are lacking. Purpose: The purpose of this in vitro study was to assess whether virtual interocclusal registration records made at different locations around th...

Purpose: To compare the marginal fit of lithium disilicate (LD) crowns fabricated with digital impression and manufacturing (DD), digital impression and traditional pressed manufacturing (DP), and traditional impression and manufacturing (TP). Materials and methods: Tooth #15 was prepared for all-ceramic crowns on an ivorine typodont. There were...

The use of digital technology has revolutionized implant dentistry by enhancing diagnostics, streamlining treatment planning, increasing the accuracy of implant placement and optimizing the design of abutments and crowns. This chapter describes the digital workflow in terms of the following aspects: (1) digital impression, (2) digital implant treat...

Elderly residents of long-term care facilities (LTC) have difficulty accessing dental services. Aiming to improve access for this population, the Geriatric Dental Program (GDP) was established by UBC Faculty of Dentistry in 2002. Within the GDP, elderly people receive fee-for-service dental care. The objective of this research was to explore whethe...

Platform switching was introduced to reduce marginal bone loss and therefore maintain the gingival architecture, leading to a more favorable esthetic result. In the patient presented, recession had resulted in the exposure of the implant neck and threads; this was managed with a custom-made additional prosthetic component. The result, although not...

PurposeThe aim of this study was to compare the internal fit of lithium disilicate crowns fabricated using digital technology with those fabricated by conventional means.Materials and Methods Forty-five lithium disilicate crowns were fabricated: 15 using digital impression and computer-aided design/computer-aided machining technique (group 1), 15 f...

Objectives: To explore reasons for the underuse of dental services covered by a government-funded program in Alberta. Methods: In 2011, a survey questionnaire was sent to 4000 randomly selected clients of the Alberta Child Health Benefit and the Alberta Adult Health Benefit programs. Only respondents with children were included in the analysis....

Little evidence is available with regard to the marginal fit of crowns fabricated with digital impressions and computer-aided design/computer-aided manufacturing technology in comparison with crowns fabricated from conventional techniques. The purpose of this study was to determine and compare the marginal fit of crowns fabricated with digital and...

Oral healthcare is an integral part of overall health and well-being, and it is a significant and increasing challenge as people grow frail. Incidence of caries and gingivitis among residents of long-term care facilities are on the rise, and daily oral hygiene is often difficult for patients who are frail or in need of assistance. Oral Healthcare a...

Objective: To evaluate the integration of daily mouth care for frail and dependant older adults into a variety of continuing care settings. Methods: A participatory approach was used to engage personal care providers, nurse managers and directors of care in three long-term care facilities to develop, implement and evaluate a comprehensive daily o...

Research focusing on the introduction of daily mouth care programs for dependent older adults in long-term care has met with limited success. There is a need for greater awareness about the importance of oral health, more education for those providing oral care, and organizational structures that provide policy and administrative support for daily...

To compare the perceptions of dentists in British Columbia regarding their decisions to provide treatment in long-term care facilities and to explore changes since 1985 in Vancouver dentists' attitudes to treating elderly patients in such facilities. Dentists were randomly selected from all of British Columbia in 2008 and surveyed with a similar qu...

To compare the dental status of Brazilian and Canadian elderly populations with respect to socioeconomic and quality of life factors. A total of 496 adults aged 60-75 years, having four or more teeth, and physically and cognitively suitable for a clinical oral examination were included. Subjects answered questions concerning their lifestyle and com...

This article is an observational-descriptive type case study with references to recent literature on ceramic fracture. The case selected was an unusual incidence of a veneer-to-core fracture of a Procera AllCeram crown after 18 months of service. This unusual case represents a significant concern to general dentists, because the highly dense alumin...

INTRODUCTION: Oral health is assessed in Canadian LTC facilities by nurses as part of the Resident Assessment Instrument Minimal Data Set (RAI-MDS) Version 2.0, a computerized care-management tool. Although an exam by a dentist is the ideal method of assessing oral health, oral health assessments are important tools because non-dental professionals...

This study will compare the clinical outcomes of 139 elders residing in long-term care (LTC) who received dental treatment with those who did not receive care under a comprehensive dental programme over 5 years. Numerous studies have documented very poor oral health and limited access to dental care among frail older adults residing in LTC faciliti...

The University of British Columbia Geriatric Dentistry Program (GDP) offers dental services and provides a comprehensive in-service education program for nursing and residential care-aide (RCA) staff in the provision of daily mouth care for elders in various long-term care (LTC) facilities in Vancouver. This study examined the general impact of the...

Objectives: Our purpose was to identify clinical factors that help to predict multiple tooth-loss in a multi-cultural population of elders. Methods: 107 men and 86 women (age at baseline: 60-75yrs; mean age: 674yrs) of low income who were irregular users of dental services participated in the 5-year Trials to Enhance Elderly Teeth Health (TEETH)....

Dentists often question the use of resin-bonded fixed partial dentures (RBFPDs) for reliable restoration of tooth-bound edentulous spaces. Initial attempts at bonding fixed partial dentures on teeth resulted in early failure due to debonding. In the 1980s and 1990s, improvements in preparation methods, metal alloys and bonding techniques made the R...

This randomized clinical trial aimed to assess the effectiveness of a pyramid-based education for improving the oral health of elders in long-term care (LTC) facilities. Fourteen facilities matched for size were assigned randomly to an active or control group. At baseline in each facility, care-aides in the active group participated with a full-tim...

The Trial to Enhance Elderly Teeth Health (TEETH) was designed to test the impact of regular rinsing with a 0.12% chlorhexidine (CHX) solution on tooth loss, and the causes of tooth loss (caries, periodontal disease and trauma) were also investigated. This paper reports on the effectiveness of a 0.12% CHX solution for controlling caries using a too...

This paper documents the experience of the University of British Columbia's Geriatric Dentistry Program (GDP) with emphasis on the dental treatment needs of patients during its first year of operation. The GDP provided access to dental care for residents of longterm care facilities, education for hospital staff concerning daily mouth care, educatio...

Little is known about how dental students respond to dental geriatrics. This article describes a qualitative analysis of reflective journals submitted over two years by ninety-two senior students who participated in a brief clinical rotation in long-term care facilities. We used an inductive interpretive approach to analyze the journals. Eight them...

The impact of smoking habits on periodontal conditions in older subjects is poorly studied. To assess if a history of smoking is associated with chronic periodontitis and medical history in older subjects. The medical and dental history was collected from 1084 subjects 60-75 years of age. Smoking history information was obtained from self-reports....

The effectiveness of either a 0.2% neutral sodium fluoride (NaF) solution or a 0.12% chlorhexidine (CHX) solution as a daily mouthrinse for controlling caries was tested against a placebo rinse in this 2-year randomized clinical trial among elders in long-term care (LTC) facilities. At baseline, 369 recruits were examined clinically for caries and...

Depression and periodontitis are common conditions in older adults. There is some evidence that these two conditions may be related. To study a population of dentate elders and assess the prevalence of depression, self-assessment of risk for periodontitis and tooth loss, in relation to periodontal disease status. Data were obtained from 701 older s...

An increased risk for periodontitis has been associated both with type-1 or insulin dependent diabetes (IDDM) and with type-2 or non-insulin dependent diabetes (NIDDM). 1) To describe and analyze periodontal conditions in older low-income ethnic diverse subjects with or without a diagnosis of diabetes. 2) To assess to what extent diabetes mellitus...

Osteoporosis (OPOR) is a common chronic disease, especially in older women. Patients are often unaware of the condition until they experience bone fractures. Studies have suggested that OPOR and periodontitis are associated diseases and exaggerated by cytokine activity. Panoramic radiography (PMX) allows studies of mandibular cortical index (MCI),...

Panoramic radiographs (PMX)s may provide information about systemic health conditions. i). To study clinical periodontal conditions and collect self-reported health status in a cohort of 1084 older subjects; ii). to study signs of alveolar bone loss and carotid calcification from panoramic radiographs obtained from these subjects; and iii). to stud...

This study was conducted to assess the oral health status and dental care needs of elderly adults living in long-term care facilities. Dentists examined 601 elderly adults, living in one of six extended-or intermediate-care facilities, between September 1999 and May 2000. Data from 532 of the subjects were analyzed with descriptive statistics and z...

Oral diseases and conditions have been identified as a significant problem for elderly residents of long-term care (LTC) hospitals in developed countries, yet little recent information is available for the Canadian population. To describe the medical, dietary, oral microbial, oral hygiene and dental status of elderly Canadians living in LTC hospita...

Dental caries has been identified as a significant problem for elderly residents of long-term care (LTC) hospitals in developed countries, yet little recent information is available for the Canadian population. To document the caries status of elderly dentate residents of intermediate and extended LTC hospitals in Vancouver and surrounding communit...

The success of oral implant treatment relies on the presence and maintenance of bone adjacent to implants. The monitoring of radiographic bone level changes provides valuable insight into the longevity of oral implants. The purpose of this study was to measure radiographic bone level changes proximal (mesial and distal) to Brånemark System® implant...

A computer-assisted measurement technique for measuring bone levels proximal (mesial and distal) to oral implants imaged on standardized intraoral radiographs offers promise for accuracy and reliability. There were no differences between bone measurements made directly from bone proximal to implants placed in a dry mandible and those resulting from...

Attempts to construct an index of oral health or disorder suitable for older adults have been limited in clinical scope or based on the judgement of very few individuals. Consequently, we present here a multidimensional index of Clinical Oral Disorder in Elders (CODE) based on a breadth of clinical measures relevant to elders. The data for the inde...

Complete, fixed partial, removable partial, and implant-supported dentures have been used to comfortably and esthetically replace missing teeth. However, it is not certain what effect these prostheses have on the residual ridge. This article compares various prosthetic treatments to restore completely and partially edentulous mouths for their abili...

This article reviews the literature on radiographic imaging techniques and image interpretation for dental implant treatment. MEDLINE was used to identify published peer-reviewed literature for this report. Radiographic images are indispensable in the evaluation of osseous structures when planning treatment for dental implants. Potential bone sites...

Implant and prosthesis success for 77 partially edentulous patients, provided with 97 fixed prostheses, supported by 230 Brånemark implants, in place for up to 12 years (mean 5.41 years), were documented in this study. Implant losses per location mirrored their placement, with no difference between zones I and II or between the maxilla and mandible...

Dental caries is the major cause of tooth loss in elderly individuals with physical and mental disabilities. The diagnosis of caries in elderly individuals is difficult due to a complicated oral environment compounded by the prevalence of physical and mental barriers to care. The restoration of tooth structure and the replacement of teeth lost due...

Dental caries is the major cause of tooth loss in elderly individuals with physical and mental disabilities. The diagnosis of caries in elderly individuals is difficult due to a complicated oral environment compounded by the prevalence of physical and mental barriers to care. The restoration of tooth structure and the replacement of teeth lost due...

A 2-yr longitudinal study was conducted among elderly disabled residents of a longterm care facility. Each of the 50 subjects examined at the beginning of the study had a mean of 14 teeth, with a mean of 6 carious and 6 restored teeth, per person. Most of the subjects had very poor oral hygiene, and 26 of them had dental plaque that produced cultur...

Abstract A 2-yr longitudinal study was conducted among elderly disabled residents of a longterm care facility. Each of the 50 subjects examined at the beginning of the study had a mean of 14 teeth, with a mean of 6 carious and 6 restored teeth, per person. Most of the subjects had very poor oral hygiene, and 26 of them had dental plaque that produc...

Specimens of debris and plaque adhering to the facial surface of teeth and samples of saliva from children and young adults were compared as a source of cariogenic bacteria. The specimens were easily obtained and offered an estimate of bacterial colonization that was comparable to the saliva. Material adhering to the facial surface of teeth provide...

Six rigid autopolymerizing acrylic resins were examined to determine and compare the cost per reline, the curing temperatures, the setting times, and the porosity of each material. The cost per reline ranged from $0.63 to $1.55. Three product groups had significantly different mean setting times, and two groups had significantly different mean sett...

This study evaluated whether oral disorders were associated with chronic systemic diseases in 532 Canadian adults who are old and very old and living in institutions. A brief oral examination documented tooth retention, caries, and periodontal and gingival health. Medical records provided information about chronic systemic conditions. A history of...