Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

Abstract

Root resorption can be caused by several factors, including contact with the cortical bone. Here we report a case involving a 21-year-old female with Angle Class II, division 1 malocclusion who exhibited significant root resorption in the maxillary right central incisor after orthodontic treatment. The patient presented with significant left-sided deviation of the maxillary incisors due to lingual dislocation of the left lateral incisor and a Class II molar relationship. Cephalometric analysis demonstrated a Class I skeletal relationship (A pointnasion-B point, 2.5 o) and proclined maxillary anterior teeth (upper incisor to sella-nasion plane angle, 113.4 o). The primary treatment objectives were the achievement of stable occlusion with midline agreement between the maxillary and mandibular dentitions and appropriate maxillary anterior tooth axes and molar relationship. A panoramic radiograph obtained after active treatment showed significant root resorption in the maxillary right central incisor; therefore, we performed cone-beam computed tomography, which confirmed root resorption along the cortical bone around the incisive canal. The findings from this case, where different degrees of root resorption were observed despite comparable degrees of orthodontic movement in the bilateral maxillary central incisors, suggest that the incisive canal could be an inducing factor for root resorption. However, further investigation is necessary to confirm this assumption.

Morphometric and volumetric analysis of the proximity between the incisive canal and maxillary central incisors during anterior retraction: a retrospective cone-beam computed tomography study

“…According to previous studies, maxillary incisor root resorption was noted after contacting or invading the IC, but neurologic problems were not reported. 8,18 Implant placement adjacent to the IC could abut or compress the nasopalatine nerve, predispose to the risk of vascular injury, and impair sensation of the anterior palate. 17 Although orthodontic retraction is a gradual process of closing the extraction spaces, IC configuration and dimensions should be properly determined before and during anterior tooth retraction to prevent unexpected nerve injury.…”

The Shape of Nasopalatine Canal as a Determining Factor in Therapeutic Approach for Orthodontic Teeth Movement—A CBCT Study

“…However, morphometric analyses, such as those performed in this study, could also influence other clinical aspects, since it has been shown that the increase in NPC width (M-L IF) was accompanied by higher prevalence of NPC perforation during maximum central incisors retraction [ 20 , 22 ]. Furthermore, the enhancement of ML-IF diameter can also be addressed for subsequent complications, such as orthodontically induced inflammatory root resorption [ 12 , 27 , 50 ]. Accordingly, since the results of this study clearly demonstrated that M-L IF dimension was influenced by NPC type and was significantly enhanced in banana NPC type, it seems that the patients with this NPC type may represent the group with a higher risk for complications during maximum central incisors retraction.…”

The Relationship Between Skeletal and Dento-Alveolar Indicators in Class Ii Malocclusion

“…Зменшення висоти прикусу при ІІ класі негативно впливає на морфо-функціональний стан скронево-нижньощелепного суглобу [4], естетику обличчя [5] Також при дистальному прикусі відмічається велика варіабельність кутів нахилу зубів фронтальної ділянки, що може впливати на стан альвеолярної кістки [6], на профіль м'яких тканин обличчя та естетику посмішки [7].…”

“…A total of 47 cephalograms from patients with II class according to Engle were analyzed. Eighteen cephalometric measurements were performed using the following methods: SNA, SNB, ANB, SN_Ba, SN_Pg, NL_NSL, ML_NSL, NL_ML, Facial axis, PFH_AFH, the sum of Bjork angles, Gonian angle, I1_NL, I1_NA, i1_ML, i1_NB, i1_APg, I1_i1 license program "Audax Ceph" v. 6 Вступ Згідно даних фахової літератури відомо, що цитокіни, простагландини, матриксні металопротеїнази, підвищують активність в результаті реакції організму на втручання пародонтопатогенів, які фактично посилюють руйнування сполучної тканини пародонта. Мікробіом пародонтальної кишені та компоненти клітинних стінок бактерій, такі як ліпополісахариди та пептидоглікани індукують макрофаги для секреції цитокінів (ІL-1β та ІL-6, ФНП-α).…”