Journal of Oral Implantology May 2013 - (Page 273)
RESEARCH
Radiographic Evaluation of Narrow-Diameter Implants
After 5 Years of Clinical Function: A Retrospective Study
Onur Geckili, PhD, DDS*
Emre Mumcu, PhD, DDS
Hakan Bilhan, PhD, DDS
The use of regular-sized dental implants is generally recommended to ensure adequate bone to implant
contact. However, when the width of the edentulous crest is insufficient for the placement of a regular-sized
implant, the use of a narrow-diameter implant (NDI) should be considered to prevent the need for invasive
reconstruction techniques such as grafting procedures. The aim of the present study was to evaluate the
survival and marginal bone levels of NDIs 5 years after prosthetic loading. A total of 159 NDIs belonging to 4
brands (Straumann, Astra Tech, Biolok, Xive) were evaluated in 71 patients. Clinical and radiographic evaluations
using digital panoramic radiography were carried out. Two implants failed and no progressive bone loss or
periapical lesions were detected in the remaining 157 implants, which is an overall success rate of 98.74%. Mean
marginal bone loss (MBL) was found 1 mm on the mesial side and 0.98 mm on the distal side of the implants. No
statistically significant relationship was detected between patient age, gender, implant location, implant length,
type of the prosthesis, and MBL (P . .05). Among the 4 brands used, the MBL was highest around the Biolok
implants but this was significant only compared with the Astra Tech implants (P , .05). The results of the
present study indicate that NDIs can be a good solution for specific clinical situations where regular-sized
implants are not suitable.
Key Words: narrow-diameter implants, marginal bone loss, dental implants, implant survival, fixed
prosthesis, overdenture
INTRODUCTION
T
he dental implant is a very successful
tool in the treatment of partial and
complete edentulism, making it a popular treatment modality.1,2 In particular
cases of single or multiple tooth loss,
preparation of healthy teeth adjacent to the
edentulous areas is avoided, and the alveolar bone
is preserved with implant restorations.3
The use of a wide or regular-sized implant (!4.0
mm) is generally recommended to ensure sufficient
bone to implant contact.4–6 However, it should be
pointed out that a minimum of 1 mm of bone
thickness must surround the entire implant surface.7
1
Istanbul University, Faculty of Dentistry, Department of
Prosthodontics, ˙stanbul, Turkey.
I
* Corresponding author, e-mail: geckili@istanbul.edu.tr
DOI: 10.1563/AAID-JOI-D-10-00158
In cases of bone atrophy of the long-term
edentulous areas or bone loss due to periodontal
diseases, periapical pathologies, and traumatic
tooth extractions, bone width is usually not
adequate for regular-sized implants.8–11 This is
because the width of the buccal and lingual bone
walls will be diminished and, in particular, the
height of the buccal socket wall will be reduced.10,11
Placing a regular-sized implant in such situations
may cause large dehiscences, and thus, a risk of
complications and failure.7 Moreover, the use of
narrow-diameter implants (NDIs) in alveolar bone
with a limited buccolingual or mesiodistal width
may prevent the risk of injury to neighboring
teeth.7,12 To overcome the above mentioned and
additional problems related to reduced interdental
spaces due to migration or drifting of the remaining
teeth, replacement of mandibular incisors and
maxillary lateral teeth, and narrow denture-bearing
Journal of Oral Implantology
273
Table of Contents for the Digital Edition of Journal of Oral Implantology May 2013
Implantology: Inter-Dependent Worldwide Relationships
Use of Osteotomes for Implant Bed Preparation-Effect on Material Properties of Bone and Primary Implant Stability
The Effects of a Static Magnetic Field on Bone Formation Around a Sandblasted, Large-Grit, Acid-Etched-Treated Titanium Implant
Effect of Platelet-Rich Plasma on the Outcome of Early Loaded Dental Implants: A 3-Year Follow-up Study
Flapless Dental Implant Surgery for Patients on Oral Anticoagulants-The "WarLess Procedure": A Report of 2 Cases
Radiographic Evaluation of Narrow-Diameter Implants After 5 Years of Clinical Function: A Retrospective Study
Histomorphometry of 2 Immediately Loaded Mini Implants Retrieved From Human Mantible After 3 Months: A Light and Scanning Electron Microscopy Report
Splinted Zirconia Fixed Partial Denture Supported by Small Diameter (Mini Implants) in the Posterior Mandible: A Case Letter
Journal of Oral Implantology May 2013
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