Journal of Oral Implantology December 2012 - (Page 668)

RESEARCH Accuracy of Cone Beam Computerized Tomography and a Three-Dimensional Stereolithographic Model in Identifying the Anterior Loop of the Mental Nerve: A Study on Cadavers Ruben R. Santana, DDS, MSD1* Jaime Lozada, DMD2 Alejandro Kleinman, DDS3 Aladdin Al-Ardah, DDS, MS3 Alan Herford, DDS, MD4 Jung-Wei Chen, DDS, MS, PhD5 The objective of this ex vivo cadaver study was to determine the accuracy of cone beam computerized tomography (CBCT) and a 3-dimensional stereolithographic (STL) model in identifying and measuring the anterior loop length (ANLL) of the mental nerve. A total of 12 cadavers (24 mental nerve plexus) were used for this study. Standardized CBCT scans of each mandible were obtained both with and without radiographic contrast tracer injected into the mental nerve plexus, and STL models of the two acquired CBCT images were made. The ANLL were measured using CBCT, STL model, and anatomy. The measurements obtained from the CBCT images and STL models were then analyzed and compared with the direct anatomic measurements. A paired sample t test was used, and P values less than .05 were considered statistically significant. The mean difference between CBCT and anatomic measurement was 0.04 mm and was not statistically significant (P ¼ .332), whereas the mean difference between STL models and anatomic measurement was 0.4 mm and was statistically significant (P ¼ .042). There was also a statistical significant difference between CBCT and the STL model (P ¼ .048) with the mean difference of 0.35 mm. Therefore, CBCT is an accurate and reliable method in determining and measuring the ANLL but the STL model over- or underestimated the ANLL by as much as 1.51 mm and 1.83 mm, respectively. Key Words: cone beam computerized tomography, anterior loop length, stereolithographic model, mental foramen, overestimate, underestimate, safety margin, mental nerve 1 Private practice and Advanced Education Program in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, Calif. 2 Advanced Education Program in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, Calif. 3 Department of Restorative Dentistry, Loma Linda University School of Dentistry, Loma Linda, Calif. 4 Department of Oral and Maxillofacial Surgery, Loma Linda University School of Dentistry, Loma Linda, Calif. 5 Department of Pediatric Dentistry, Loma Linda University School of Dentistry, Loma Linda, Calif. * Corresponding author, e-mail: rrrsant@aol.com DOI: 10.1563/AAID-JOI-D-11-00130 INTRODUCTION mplant dentistry has evolved over the years and has become a predictable treatment modality.1 Thorough preoperative planning of implant treatment is a prerequisite for a successful treatment outcome.2 This requires a comprehensive knowledge of anatomic appearances and variations.3–5 Treatment concepts for the edentulous mandible using removable implant I 668 Vol. XXXVIII /No. Six /2012

Table of Contents for the Digital Edition of Journal of Oral Implantology December 2012

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Lateral Augmentation of the Maxilla and Mandible Using Framework Technique With Allogeneic Bone Grafts
Accuracy of Cone Beam Computerized Tomography and a Three-Dimensional Stereolithographic Model in Identifying the Anterior Loop of the Mental Nerve: A Study on Cadavers
Evaluation of Microgap Size and Microbial Leakage in the Connection Area of 4 Abutments With Straumann (ITI) Implant
Buccal Bone Plate Remodeling After Immediate Implant Placement With and Without Synthetic Bone Grafting and Flapless Surgery: Radiographic Study in Dogs
Evaluation of Soft Tissues Around Single Tooth Implants in the Anterior Maxilla Restored With Cemented and Screw-Retained Crowns
Accuracy of a Newly Developed Cone-Beam Computerized Tomography-Aided Surgical Guidance System for Dental Implant Placement: An Ex Vivo Study
Nasopalatine Canal Position Relative to the Maxillary Central Incisors: A Cone Beam Computed Tomography Assessment
Esthetics in Implant-Supported Prostheses: A Literature Review
Reliability of Implant Surgical Guides Based on Soft-Tissue Models
Clinical Evaluation of Short and Wide-Diameter Implants Immediately Placed Into Extraction Sockets of Posterior Areas: A 2-Year Retrospective Study
Single Stage Immediate Implant Placements in the Esthetic Zone
Removal of Fractured Dental Implant Screw Using a New Technique: A Case Report
Restoration of Failing Maxillary Implant-Supported Fixed Prosthesis With Cross Arch Splinted Unilateral Zygomatic Implant: A Clinical Report
Oral Rehabilitation of Severe Dentoalveolar Trauma: A Clinical Report
Implant Installation With Bone Augmentation and Transmucosal Healing With Demineralized Human Cortical Bone in the Maxillary Anterior Region: Report of 3 Cases
Bone Morphogenic Protein: An Elixir for Bone Grafting—A Review
Orthodontic Considerations in Restorative Management of Hypodontia Patients With Endosseous Implants
Squamous Cell Carcinoma in Association With Dental Implants: An Assessment of Previously Hypothesized Carcinogenic Mechanisms and a Case Report
Indirect Osteotome Maxillary Sinus Floor Elevation: An Update
Reliability of Implant Surgical Guides Based on Soft-Tissue Models: A Methodological Mistake

Journal of Oral Implantology December 2012