Abstract
Abstract Introduction Primary occlusal trauma (OT) is an injury of the periodontium with normal height as a result of occlusal forces which exceed their adaptive capacity. Objective To evaluate, histometrically, the alveolar bone loss in the furcation region of rats experimentally submitted to 2 models of occlusal overload. Material and method 45 animals randomly divided into 3 groups: Occlusal Interference (OI, n = 15) - fixing an orthodontic wire segment on the occlusal surface of the first lower molar; Occlusal Overload (OO, n = 15) - wearing of the cusps of the lower contralateral molars, the second and third molars next to the first molar that had its dimensions maintained; Negative Control (NC, n = 15) - evaluation of the initial dimensions of the periodontal ligament (PL). Five animals / group were sacrificed after 14, 21 and 28 days. Result Intergroup evaluation showed significant bone loss in OI (p<0.001) and OO (p<0.01) compared to NC. OI had significantly higher bone loss compared to OO at 14 (p<0.01), 21 (p <0.01) and 28 days (p<0.01). The intragroup evaluation showed no significant influence of time on bone loss in OI and OO, regardless of the technique used (p>0.05). The thickness of the PL remained stable in NC (p>0.05). Conclusion OI and OO were effective in the experimental reproduction of OT, and OI promoted greater alveolar bone loss compared to OO, showing that the impact of occlusal overload in OI increased the extent of the OT injury.
Highlights
Primary occlusal trauma (OT) is an injury of the periodontium with normal height as a result of occlusal forces which exceed their adaptive capacity
Ideal functional occlusion is characterized by an appropriate intercuspal tooth, to preserve all physiological components of the stomatognathic system, namely the dental occlusion, the temporomandibular joint, the tooth attachment and the entire neuromuscular mechanism involved in the process of biomechanics of occlusion[3]
The 45 animals were randomly divided into 3 groups: Occlusal Interference Group (OI, N=15): The animals were anesthetized by intramuscular administration of ketamine (1mL/kg) (Dopalen ; Vetbrands LTDA, Jacareí, SP, Brazil) and xylazine hydrochloride (0.3 mL/kg) (Virbaxil ; Virbac do Brasil Indústria e Comércio LTDA, Roseira, SP, Brazil)
Summary
Primary occlusal trauma (OT) is an injury of the periodontium with normal height as a result of occlusal forces which exceed their adaptive capacity. Conclusion: OI and OO were effective in the experimental reproduction of OT, and OI promoted greater alveolar bone loss compared to OO, showing that the impact of occlusal overload in OI increased the extent of the OT injury. The main functions of this sustaining apparatus are to connect the tooth physically, the root, to the dental socket and mechanically to adapt to the functional demands arising from occlusion[1,2]. This permits physiological micro‐adaptations without rupturing the homeostasis of this system and consequent appearance of injuries. Changes in the occlusal contacts imply an adaptation of both the periodontal tissues as well as the entire stomatognathic system
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
