Accuracy of a novel modified single computed tomography scanning method for assisting dental implant placement: a retrospective observational study

Shimizu, Hiroaki; Mino, Takuya; Kurosaki, Yoko; Arakawa, Hikaru; Tokumoto, Kana; Kimura-Ono, Aya; Maekawa, Kenji; Kuboki, Takuo

doi:10.1186/s40729-023-00509-8

International Journal of Implant Dentistry

Table 4 Risk factors for large 3D deviation at the entry of the implant body between preoperative simulation and actual placement analyzed by GEEs

From: Accuracy of a novel modified single computed tomography scanning method for assisting dental implant placement: a retrospective observational study

	p value	Odds ratio	95% CI
	p value	Odds ratio	Lower limit	Upper limit
Factors related to each surgical guide
Surgical guide fabrication methods (SCT method/DCT method/MSCT method)
SCT method	< 0.001	1.438	1.177	1.757
DCT method	0.006	1.178	1.047	1.326
MSCT method		1.000
Sex (male/female: male)	0.529	0.969	0.880	1.068
Age at implant placement surgery (younger)	0.036	0.995	0.991	1.000
Number of coronal teeth (lower)	0.131	0.981	0.957	1.006
Number of teeth with metal restorations (higher)	0.892	1.001	0.983	1.020
Number of placed implants (lower)	0.602	0.990	0.955	1.027
Dentition defect type (Kennedy classification Class I/II/III/IV/complete edetulism)
Class I	0.404	0.924	0.766	1.113
Class II	0.598	1.071	0.830	1.381
Class III	0.830	0.968	0.720	1.301
Class IV	0.835	1.034	0.756	1.414
Edentulism		1.000
Number of fixation pins (higher)	0.258	1.019	0.986	1.052
Factors related to each implant body
Shape of implant body (straight/tapered: straight)	0.793	0.982	0.855	1.128
Implant width (NP/RP/WP)
NP	0.746	1.026	0.877	1.201
RP	0.835	0.985	0.858	1.132
WP		1.000
Implant length (longer)	0.938	0.999	0.976	1.022
Implant location (anterior/posterior: posterior)	0.034	1.114	1.007	1.206
Implant location (maxillary/mandibular: maxillary)	0.726	0.974	0.838	1.131
Immediate implant placement (with/without: with)	0.292	0.898	0.734	1.098
Bone augmentation (with/without: with)	0.961	1.005	0.819	1.233
Alveolar bone quality (lower)	0.785	1.009	0.947	1.075
Distance between guide sleeve bottom to bone surface (longer)	0.922	1.003	0.942	1.068
Bone surface inclination X (smaller)	0.006	0.997	0.994	0.999
Bone surface inclination Y (smaller)	0.397	0.999	0.997	1.001

Bold means p < 0.05
3D: three-dimensional, GEEs: generalized estimating equations, CI: confidence interval, CT: computed tomography, SCT: single CT scan, DCT: double CT scan, MSCT: modified single CT scan, NP: narrow platform, RP: regular platform, WP: wide platform

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