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 5 Risk factors for large 3D deviation at the tip 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	0.003	1.361	1.109	1.670
DCT method	< 0.001	1.418	1.230	1.633
MSCT method		1.000
Sex (male/female: male)	0.770	0.982	0.870	1.109
Age at implant placement surgery (younger)	0.043	0.995	0.989	1.000
Number of coronal teeth (lower)	0.981	1.000	0.969	1.032
Number of teeth with metal restorations (higher)	0.899	0.998	0.974	1.023
Number of placed implants (lower)	0.222	0.977	0.942	1.014
Dentition defect type (Kennedy Classifications Class I/II/III/IV/complete edentulism)
Class I	1.193	0.856	0.677	1.082
Class II	0.934	1.013	0.754	1.360
Class III	0.538	0.902	0.650	1.252
Class IV	0.492	1.107	0.829	1.477
Edentulism		1.000
Number of fixation pins (higher)	0.113	1.035	0.992	1.079
Factors related to each implant body
Shape of implant body (straight/tapered: straight)	0.710	1.035	0.862	1.243
Implant width (NP/RP/WP)
NP	0.433	1.096	0.871	1.380
RP	0.669	1.046	0.851	1.286
WP		1.000
Implant length (longer)	0.006	1.051	1.014	1.088
Implant location (anterior/posterior: posterior)	0.001	1.190	1.074	1.319
Implant location (maxillary/mandibular: maxillary)	0.240	0.886	0.725	1.084
Immediate implant placement (with/without: with)	0.488	0.917	0.718	1.171
Bone augmentation (with/without: with)	0.464	0.904	0.690	1.184
Alveolar bone quality (lower)	0.976	1.001	0.917	1.093
Distance between guide sleeve bottom to bone surface (longer)	0.906	1.005	0.930	1.086
Bone surface inclination X (smaller)	0.419	0.999	0.996	1.002
Bone surface inclination Y (smaller)	0.088	0.998	0.995	1.000

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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