Korean J Oral Maxillofac Radiol.  2003 Jun;33(2):79-83.

Study of the relationship between the indication rod of stent on implant CT and the real path of implant fixture insertion considering residual ridge

• Kim DH
• Heo MS
• Lee SS
• Oh SO
• Choi HM
• Jeon IS
• Choi SC

Abstract

PURPOSE
To assess the relationship between the direction of the indicating rod of the radiographic stent for ideal prosthetic design and the actual possible path of implant fixture placement when residual ridge resorption is considered. MATERIALS AND METHODS: The study materials consisted of 326 implant sites (male 214 cases and female 112 cases) from a total of 106 patients (male 65 patients and female 41 patients) who desired implant prostheses. Computed tomography of patients were taken and reformatted using ToothPix (R) software. Bony defects, bony sclerosis, the change of the direction of indicating rod, and root proximity of the adjacent teeth were examined on the CT-derived images. RESULTS: The rate of the irregular crestal cortex was relatively high on premolar and molar area of maxilla. Mandibular molar area showed relatively high rate of focal sclerosis on the area of implant fixture insertion. The position of the indicating rods were relatively acceptable on the molar areas of both jaws. However, the position of the indicating rods should be shifted to buccal side with lingual rotation of the apical end on maxillary anterior teeth and premolar area. CONCLUSION: Clinically determined rod direction and position of the indicating rod for implant placement was not always acceptable for insertion according to the reformatted CT images. The pre-operative treatment plan for implant should be determined carefully, considering the state of the alveolar bone using the reformatted CT images.

Keyword

dental implant; tomography; x-ray computed; stents

MeSH Terms

Bicuspid
Dental Implants
Female
Humans
Jaw
Maxilla
Molar
Prostheses and Implants
Sclerosis
Stents*
Tooth
Dental Implants