The Characteristics of Adjacent Anatomy of Mandibular Third Molar Germs: A CBCT Pilot Study in Patients with Osteogenesis Imperfecta

Abstract

(1) Objectives: The aim of our study was to investigate the anatomical features of lower third molar and its adjacent anatomical connections in type I Osteogenesis Imperfecta (OI) patients through cone beam computed tomography (cbct). (2) Methods: The study was conducted among 25 patients, 13 patients with type I OI and 12 control patients (individuals with no disorders and no treatment); average age was 15.44 ± 2.06, 23 third molar germs for each group. The germs have been compared to the parameters using the Mann-Whitney test. A chi-square test was also used to investigate the correlation between the status case/control and tooth development stage. (3) Results: Mann-Whitney test showed significant differences between cases and controls: diameter of the tooth germ in toto (U = 93.5; p < 0.001), tooth development stage, (U = 145; p < 0.01), roots length (U = 44.5; p < 0.01), cementoenamel junction diameter (U = 157.5; p < 0.05), size of the pulp chamber (U = 95.5; p < 0.05). Type I OI is not associated with the relationship between the germ of mandibular third molar and alveolar canal on axial plane (χ2 = 4.095; p = 0.129), and parasagittal (χ2 = 4.800; p = 0.091). The association between type I OI and relationship with the germ of mandibular third molar and alveolar canal on the coronal plane has been significant (χ2 = 9.778; p < 0.05) as the perforation of the lingual cortical bone in the region of mandibular third molar tooth germ (χ2 = 11.189; p < 0.01). (4) Conclusions: The results confirm the cbct accuracy in the evaluation of bone density in type I OI patients giving also the opportunity to study the tridimensional anatomy of germs and the adjacent anatomical structures in order to avoid any perioperative complications.

The Evaluation of Further Complications after the Extraction of the Third Molar Germ: A Pilot Study in Paediatric Dentistry

“…Regarding injuries to the IAN and LN, Rui Sun et al investigated the characteristics of the adjacent anatomy of the mandibular third molar germs (MTMG) in their study [47,48]. Patients enrolled in the study, aged between 12 and 17 years, underwent cone-beam computed tomography (CBCT) and, subsequently, the authors analyzed structures and parameters by comparing them with age, sex, degree of tooth development and tooth position [49]. The chances of alteration of the cortical profile of the inferior alveolar canal (IAC) or of the hard tissues of the germ in contact with the IAC were significantly lower in the 12 to 13 year old group and when the Nolla stage ≤ 6, i.e., when the germ had just completed mineralization of the crown and root development began.…”

New 3D Cone Beam CT Imaging Parameters to Assist the Dentist in Treating Patients with Osteogenesis Imperfecta

“…The patient’s benefit is achieved by reducing complications and eliminating or limiting a worse malocclusion setting. Therefore, it is essential that the dentist, given the anatomical variability found in our study, pays close attention to some warning signs, probably pathognomonic of OI, and sometimes already present in necessary diagnostic investigations (orthopantomography and periapical intraoral radiography), which may already suggest an unusual anatomical situation and therefore requires further in-depth diagnostic examinations (CBCT) [ 30 ].…”

Cone Beam Computer Tomography and Histological Evaluation of Dental Follicle of Impacted Lower Third Molar Germs in Teens: A Histo-Radiographic Correlation Study in a Case Series

“…CBCT was performed as described previously [36]. Briefly, imaging was executed with a Newtom 5G device (Cefla S.C., Verona, Italy).…”

“…At present, it is increasingly common to have a pre-surgical evaluation using tridimensional radiographic exams (e.g., cone beam computer tomography, CBCT) [22,[24][25][26][27][28][29][30][31][32][33][34]. Because of the low dosage of X-rays associated with this method, it represents the foremost technique administered in pediatric patients [35,36]. In the specific context of impacted third molars, CBCT can be more accurate than conventional two-dimensional radiographic methods in displaying the morphology of the teeth and of their related anatomical structures, as well as in the measurement of DF width [14,22,[24][25][26][27][28][29][30][31][32][33][34].…”