031.
Esthetic implant
dentistry
Dr. FAHAD H. AL-KAHTANI
Orthodontist and Oral Implantologist, Dental
Department, AlNakheel Medical Center,
Riyadh, Saudi Arabia
The original application of endosseos osseointegrated
implants was directed toward the treatment of the totally edentulous patient.
The overriding treatment objective was a long-term, stable bone anchored
prosthesis especially in the mandible. Esthetic considerations were not of primary
importance in this patient population. With the successful application of
endosseous implants in partially edentulous patients, esthetic considerations
moved to the fare forward and led to the development of new techniques and
components that allowed for more natural esthetically pleasing implant
supported restorations. The anterior maxillary implant-supported restoration is
one of the most challenging restorations in dentistry. The placement of dental
implants in the anterior maxilla is a challenge for clinicians because of patient's
esthetic demands and difficult pre-existing anatomy. The anatomic, surgical and
prosthetic considerations for these demanding indications for implant therapy
will be discussed. Anatomic factors such as horizontal or vertical bone
deficiencies and iatrogenic factors such as improper implant selection or the
malpositioning of dental implants for an esthetic implant restoration will be
covered. Aspects of preoperative analysis are described in various clinical
situations, followed by recommendations for the surgical procedures in
single-tooth gaps and in extended edentulous spaces with multiple missing
teeth. An ideal implant position in all 3 dimensions is required. These
mesiodistal, apicocoronal, and orofacial dimensions are well described,
defining comfort and danger zones for proper implant position in the anterior
maxilla. Hard and soft tissue preparation for the implant site to maximize the
esthetic results will be discussed. Twelve cases will be presented to explain the
management of missing central incisor, lateral incisors, canine and premolars
with full explanation of surgical and prosthetic procedures.
Saudi Dental Journal
2007;19(SI)-Abstr.031
032.
Individual
increment-splitting: An alternative placement technique for large cervical
composite restorations
Prof. KHAMIS A. HASSAN
Professor and Head, Operative Dentistry Division, Department of Restorative
Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi
Arabia
Restoration of cervical lesions with composite resins
requires a great deal of endeavor to achieve good esthetics and marginal seal,
though these lesions might seem initially easy to restore on account of their
direct access. The composite resin restorations of large cervical lesions
extending onto the root surface bond incisally to enamel and dentin, and
gingivally to root dentin. The gingival marginal sealing of such large bonded
restorations presents a challenge to the practitioner due to the generated polymerization
shrinkage stresses characteristic to these composite resin materials. Different
incremental techniques for restoring such lesions were introduced in an effort
to solve this problem. This presentation will discuss different trends of such
placement techniques. The "split-increment technique" as an
alternative for placement of composite resin in large cervical carious cavities
extending onto the root surface will be also highlighted.
Saudi Dental Journal
2007;19(SI)-Abstr.032
033.
The
miracle of composite: Updates
Dr. TARIK S.
AL-JUHANI
Consultant
and Head Section of General Dentistry, Dental Department, King Faisal
Specialist Hospital and Research Center, Jeddah, Saudi Arabia
For
the last 5 decades, composite has been the main material in the arsenal of the
restorative dentist where the ability to reconstruct tooth structure in a tooth
coloured restoration had given dentists by far the aesthetic advantage, and as
the generations of this miraculous material evolves, it is becoming harder and
harder to catch up with the progress in the technology and what is available in
the market. In this lecture, a view on updates related to the materials and its
marketing with some hints on clinical insight related to many of the composites
will be discussed
Saudi Dental Journal
2007;19(SI)-Abstr.033
034.
Hypodontia: Proposed classification and model for
etiology
Dr. MOHAMMAD H.
AL-JAMMAZ
Consultant
in Orthodontics and Management of Dentofacial Anomalies, Riyadh Medical Complex
- Dental Center, Ministry of Health, Riyadh, Saudi Arabia
Hypodontia is a phenomenon that may cause handicapped malocclusions
due to alterations in size, shape, form, location, eruption and/or alignment of
the remaining teeth. The study objectives are to investigate tooth-size and
tooth-shape in hypodontia patients, to test the influence of severity of the
anomaly and gender on measurements and to propose a classification and
etiological model for hypodontia in human.
Mesio-distal, bucco-lingual,
occluso-gingival, perimeter, area and tapering measurements were obtained for
permanent teeth using dental models, digital image analysis system and manual
technique for 30 Saudi-Arabian and 120 white-Caucasian hypodontia patients
classified into mild, moderate and severe (missing of 1-2, 3-5 and 6 or more
teeth, respectively). Groups were matched for gender and controls were used for
comparisons for each ethnic population. The data formed a layout with two
factors, gender and severity of hypodontia. Two-way ANOVA and t-tests with
Bonferroni adjustment for P-values were used.
There were trends: Tooth-size
reduction and tooth-shape deformity in hypodontia dentitions with variation.
Females were more frequently affected than males. These alterations increase
with an increase in teeth missing. Overall findings support the classification
and multifactorial etiological model for hypodontia. A multi-disciplinary
treatment-approach is recommended to enhance esthetics and function for
hypodontia patients.
Saudi Dental Journal
2007;19(SI)-Abstr.034
035.
Pain
in orthodontic treatment in three different age groups
Prof. AHMED
RAMI AFIFY*, Prof. AHMED EL-BIALY**, Dr. YASSER L. MAHMOUD***
*Professor of Orthodontics, Faculty
of Dentistry,King Abdulaziz University,
Jeddah, Saudi Arabia
**Professor of Orthodontics,
Orthodontic Department, ***Lecturer, Orthodontic Department
Faculty of Dentistry, Mansoura University, Egypt
The feeling of pain as a result of orthodontic tooth
movement is one of the most cited negative side effects associated with
orthodontic treatment. Pain intensity ranges from a slight soreness to a severe
constant, throbbing pain. The purpose of the present investigation was to
assess pain experiences during the initial stages of orthodontic treatment in
terms of level and duration. Also to relate these assessments to the different
age ranges. The subject material comprised 45 female patients with an age range
of 11 - 39 years with Class I crowding. All patients were treated by extraction
four first bicuspids with the Straight-wire technique 0.018x 0.025" Roth
prescription system. Subjects were divided into 3 equal groups based on their
age. Following the placement and ligation of the first archwire (Nickel
titanium 0.014" alloy archwire) subjective assessments of pain were made
by means of a 100-mm visual analogue scale (VAS) after two hours and then every
24 hours over the first 7 days. Results revealed the following: (1) All
patients experienced pain during treatment. (2) Pain was initiated in the
majority of cases after 2 hours and peaked after 24 hours in 100%of cases then
descended by the third day. (3) There was no statistically significant
difference in pain perception among the three age groups although the mean of
pain experience was always the highest in the eldest group. (4) At seventh day,
35% of the patients still recorded pain.
Saudi Dental Journal
2007;19(SI)-Abstr.035
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