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Implant positioning errors in freehand and computer-aided placement methods: a single-blind clinical comparative
Volkan Arisan1, Cüneyt Z Karabuda, Emre Mumcu
1Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Çapa, Istanbul, Turkey. varisan@istanbul.edu.tr
The International Journal of Oral & Maxillofacial Implants
|February 5, 2013
Summary
Computer-aided dental implant placement significantly reduces positioning errors compared to the freehand method. Single-type, mucosa-supported guides offer the lowest error rates, enhancing treatment predictability.
Area of Science:
- Oral surgery
- Biomedical engineering
- Dental implantology
Background:
- Simultaneous placement of multiple dental implants can lead to suboptimal positioning, particularly in edentulous jaws requiring fixed restorations.
- Accurate implant positioning is critical for successful prosthetic outcomes and long-term implant survival.
Purpose of the Study:
- To compare the incidence of implant positioning errors between freehand and computer-aided surgical methods.
- To identify confounding factors influencing implant positioning accuracy in edentulous patients.
Main Methods:
- A total of 353 implants were placed in 54 patients using both freehand and computer-aided techniques.
- Stereolithographic surgical guides (mucosa- and bone-supported, single- and multiple-type) were employed.
- A blinded examiner assessed seven positioning error criteria; data analyzed via chi-square and logistic regression.
Main Results:
- Freehand placement showed significantly higher rates of interproximal emergence, insufficient interimplant distance, and improper parallelism.
- The freehand method had an 88% probability of positioning error, while single-type, mucosa-supported guides had the lowest (6%).
Conclusions:
- Computer-aided methods effectively reduce implant positioning errors common with the freehand technique.
- Software planning and single-type, mucosa-supported stereolithographic guides minimize errors in suitable patients.
