The influence of smoking and surgical technique on the accuracy of mucosa-supported stereolithographic surgical guide in complete edentulous upper jaws

M. Cassetta, G. Pompa, S. Di Carlo, L. Piccoli, A. Pacifici, L. Pacifici

Department of Oral and Maxillofacial Sciences, School of Dentistry, Sapienza University of Rome, Rome, Italy. michele.cassetta@uniroma1.it

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• Maxillofacial Surgery

BACKGROUND: The accuracy of a stereolithographic surgical guide depends on several variables that can affect at any time from the software-planning stage to the surgical field.

AIM: The purpose of this study was to evaluate the accuracy of implants inserted using a single mucosa-supported stereolithographic surgical guide determining also the influence of surgical technique (fixed and not-fixed) and smoking on the deviation parameters.

MATERIALS AND METHODS: 11 patients, totally edentate in the upper arch and needed an implant-prosthetic rehabilitation, were selected. 95 implants were planned and inserted. The pre- and post-operative CT images were compared using software.

RESULTS: Global, coronal (Mean: 1.65; Range: 3.00-0.13; SD:0.56) and apical (Mean: 2.15; Range: 4.23-0.34; SD:0.81), and angular (Mean: 4.62; Range: 15.25-0.28; SD: 2.74) deviation values were determined. The mean values of mucosa thickness in smokers and nonsmokers patients were 4.53 mm and 3.42 mm respectively (p < .05). The accuracy data showed a better result for the angular deviation when the surgical template was fixed (p = .002) and a better global apical deviation in the nonsmokers (p < .05).

CONCLUSIONS: It is essential, especially in smoker patients, to respect a minimum safety distance of 3 mm from limiting anatomic structures.

 

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