講演情報
[P-155（E）]Full mouth rehabilitation in a partially edentulous patient with cross occlusion and an unstable mandibular position using treatment dentures and implant prostheses: A case report
*Sunwoo Kang1, Gahyeon Yeo2, Hoyoung Cha2 (1. Department of Dental Prosthdontics, Dong-A University Hospital, 2. Department of Oral and Maxillofacial Surgery, Dong-A University Hospital)
[Introduction]
Patients who have a crossed occlusion with residual teeth frequently exhibit unstable occlusion due to collapsed vertical dimension and masticatory habits with remaining teeth. In these cases, establishing a stable mandibular movement is critical for ensuring the long-term stability of restorative treatment.
[Case Summary and Treatment Details]
In this case study, existing dentures of the patient with staggered occlusion were converted into treatment dentures with flat occlusion table for the stabilization of mandibular movements. Implants were inserted on the edentulous sites and fixed prostheses and a hybrid implant prosthesis were fabricated based on this achieved stabilized position. The clinical results were satisfactory in function and esthetics.
[Progress and Discussion]
When restoring a crossed occlusion with conventional removable partial dentures, rotational movements of the denture may occur, leading to decreased denture stability and retention. Additionally, the strong occlusal forces from opposing teeth accelerate bone resorption in the edentulous areas, reducing the fit of the denture base and increasing lateral forces on the abutment teeth. These forces often result in complications such as dental caries, tooth mobility, and alveolar bone resorption. In this case, fixed implant prostheses and implant-supported hybrid prostheses were fabricated on the edentulous site. It provided superior psychological satisfaction compared to removable dentures and yielded excellent functional and esthetic outcomes. For long-term stability, periodic follow-ups and meticulous adjustments are considered necessary.
[References]
1) Obana JI. Prosthodontic treatment for maxillary and mandibular teeth cross each other. 1st ed.; Ishiyaku publishers;1994
2) Hyun-Su Oh et al. Implant-assisted Removable Prosthetic Rehabilitation of a Patient with Crossed Occlusion, J Korean Dent Sci. 2021;14(1):32-39, https://doi.org/10.5856/JK
3) Kim Y, Lee Y, Hong SJ et al. Full mouth rehabilitation in edentulous patient with unstable mandibular position using flat table treatment dentures and CAD-CAM technology. J Korean Acad Prosthodont 2022; 60 (4): 330.(4):330-338.10.4047/jkap.2022.60.4.330.
4) Pakzad P, Mosavar A. A new look toward crown-to-implant ratio. Am J Dent 2022 ;35(1):43-48.
5) Malo P, de Araújo Nobre M, Lopes A et al. A longitudinal study of the survival of All-on-4 implants in the mandible with up to 10 years of follow-up. J Am Dent Assoc 2011; 142: 310-20.
Patients who have a crossed occlusion with residual teeth frequently exhibit unstable occlusion due to collapsed vertical dimension and masticatory habits with remaining teeth. In these cases, establishing a stable mandibular movement is critical for ensuring the long-term stability of restorative treatment.
[Case Summary and Treatment Details]
In this case study, existing dentures of the patient with staggered occlusion were converted into treatment dentures with flat occlusion table for the stabilization of mandibular movements. Implants were inserted on the edentulous sites and fixed prostheses and a hybrid implant prosthesis were fabricated based on this achieved stabilized position. The clinical results were satisfactory in function and esthetics.
[Progress and Discussion]
When restoring a crossed occlusion with conventional removable partial dentures, rotational movements of the denture may occur, leading to decreased denture stability and retention. Additionally, the strong occlusal forces from opposing teeth accelerate bone resorption in the edentulous areas, reducing the fit of the denture base and increasing lateral forces on the abutment teeth. These forces often result in complications such as dental caries, tooth mobility, and alveolar bone resorption. In this case, fixed implant prostheses and implant-supported hybrid prostheses were fabricated on the edentulous site. It provided superior psychological satisfaction compared to removable dentures and yielded excellent functional and esthetic outcomes. For long-term stability, periodic follow-ups and meticulous adjustments are considered necessary.
[References]
1) Obana JI. Prosthodontic treatment for maxillary and mandibular teeth cross each other. 1st ed.; Ishiyaku publishers;1994
2) Hyun-Su Oh et al. Implant-assisted Removable Prosthetic Rehabilitation of a Patient with Crossed Occlusion, J Korean Dent Sci. 2021;14(1):32-39, https://doi.org/10.5856/JK
3) Kim Y, Lee Y, Hong SJ et al. Full mouth rehabilitation in edentulous patient with unstable mandibular position using flat table treatment dentures and CAD-CAM technology. J Korean Acad Prosthodont 2022; 60 (4): 330.(4):330-338.10.4047/jkap.2022.60.4.330.
4) Pakzad P, Mosavar A. A new look toward crown-to-implant ratio. Am J Dent 2022 ;35(1):43-48.
5) Malo P, de Araújo Nobre M, Lopes A et al. A longitudinal study of the survival of All-on-4 implants in the mandible with up to 10 years of follow-up. J Am Dent Assoc 2011; 142: 310-20.