DOI QR코드

DOI QR Code

Full mouth rehabilitation of skeletal class II patient with regaining occlusal vertical dimension: a case report

골격성 2급 부정교합 환자의 수직교합고경 회복을 동반한 전악 수복 증례

  • Junghyun Park (Department of Dentistry, Graduate School, Kyung Hee University) ;
  • Seoung-Jin Hong (Department of Prosthodontics, College of Dentistry, Kyung Hee University) ;
  • Janghyun Paek (Department of Prosthodontics, College of Dentistry, Kyung Hee University) ;
  • Kwantae Noh (Department of Prosthodontics, College of Dentistry, Kyung Hee University) ;
  • Ahran Pae (Department of Prosthodontics, College of Dentistry, Kyung Hee University) ;
  • Kung-Rock Kwon (Department of Prosthodontics, College of Dentistry, Kyung Hee University) ;
  • Hyeong-Seob Kim (Department of Prosthodontics, College of Dentistry, Kyung Hee University)
  • 박정현 (경희대학교 일반대학원 치의학과) ;
  • 홍성진 (경희대학교 치과대학 치과보철학교실) ;
  • 백장현 (경희대학교 치과대학 치과보철학교실) ;
  • 노관태 (경희대학교 치과대학 치과보철학교실) ;
  • 배아란 (경희대학교 치과대학 치과보철학교실) ;
  • 권긍록 (경희대학교 치과대학 치과보철학교실) ;
  • 김형섭 (경희대학교 치과대학 치과보철학교실)
  • Received : 2024.07.16
  • Accepted : 2024.09.04
  • Published : 2024.10.31

Abstract

Class II malocclusions present with a different occlusal pattern to patients with Class I malocclusions, characterized by a large overjet and overbite in the anterior region, resulting in habitual mandibular protrusion during speech or mastication. When rehabilitating Class II patients, it is important to consider lateral and anterior guidance, to ensure balanced posterior guidance during protrusive movements before anterior contact, and to establish freedom in the intercuspal position. In this case, digital tools were used for the full-mouth rehabilitation of a skeletal class II patient. A virtual patient was created using facial scan data, digital facebow transfer and jaw motion tracking. Provisional restorations were fabricated based on the virtual patient. After identifying occlusal interference during anterior movement with the first provisional, the virtual patient was updated and the occlusal design was refined. For the final restorations, the virtual patient was updated again to reflect the functionally and esthetically satisfactory provisional restorations and their adapted occlusion. This digital approach facilitated accurate replication of the dynamic occlusal relationships, resulting in functionally and esthetically successful outcomes.

골격성 2급 부정교합 환자들은 전치부의 큰 수평 및 수직 피개로 인해 말하거나 저작할 때 하악을 내미는 경향이 있다. 이러한 환자들을 수직교합고경 증가를 동반한 수복 시, 전·측방 운동에서 전치부가 유도 기능을 최대한 유지할 수 있게 수복하고 전방 운동 시 전치부 접촉 전까지 구치부가 양측에서 균등하게 유도 기능을 할 수 있도록 설계해야 한다. 또한, 하악을 내미는 습관적 교합을 고려해 교두간 접촉위에서 넓은 자유역을 부여해야 한다. 본 증례에서는 디지털 도구를 활용해 안면 스캔, 디지털 안궁 이전, 하악 운동 데이터를 computer-aided design (CAD) 소프트웨어에 통합하여 가상 환자를 생성하고, 이를 기반으로 교합평면과 절치로각을 설정하여 임시 수복물을 제작하였다. 1차 임시 수복물 사용 중 전방 운동시 교합 간섭이 발견되어, 임시 수복물 장착 상태에서 위 3가지 데이터를 다시 획득한 후, 가상 환자를 업데이트하여 임시 수복물의 형태를 수정하였다. 3개월간 적응 후 최종 수복물 제작 시에도 2차 임시 수복물 장착 상태에서의 데이터를 채득하여 가상 환자를 다시 한 번 업데이트하였다. 이와 같은 디지털 도구들을 활용하여 2급 부정교합 환자의 수복에 주요 영향을 미치는 전방 운동 시의 동적 교합을 쉽게 채득하고 재현하여 수복물 디자인에 반영할 수 있었으며, 수정도 용이하였다. 이를 통해 기능과 심미에서 만족스러운 치료 결과를 얻을 수 있음을 보여주었기에 본 증례를 보고한다.

Keywords

References

  1. Jensen WO. Occlusion for the Class II jaw relations patient. J Prosthet Dent 1990;64:432-4. 
  2. Ricketts RM. The role of cephalometrics in prosthetic diagnosis. J Prosthet Dent 1956;6:488-503. 
  3. Burnett CA, Clifford TJ. The mandibular speech envelope in subjects with and without incisal tooth wear. Int J Prosthodont 1999;12:514-8. 
  4. Riise C, Sheikholeslam A. The influence of experimental interfering occlusal contacts on the postural activity of the anterior temporal and masseter muscles in young adults. J Oral Rehabil 1982;9:419-25. 
  5. Ambard A, Mueninghoff L. Planning restorative treatment for patients with severe Class II malocclusions. J Prosthet Dent 2002;88:200-7. 
  6. Kim Y, Oh TJ, Misch CE, Wang HL. Occlusal considerations in implant therapy: clinical guidelines with biomechanical rationale. Clin Oral Implants Res 2005;16:26-35. 
  7. Misch CE. Maxillary denture opposing an implant overdenture. 2nd ed. St. Louis; Mosby; 1993. 
  8. Kwon JH, Woo YH, Choi DG. The study of relationship between sagittal condylar guide angle and incisal guide angle during mandibular protrusion in normal Korean. J Korean Acad Prosthodont 1989;27:11-36. 
  9. Tench RW. Dangers in dental reconstruction in-volving increase of the vertical dimension of the lower third of the human face. J Am Dent Assoc 1938;25:566-70. 
  10. Monteith B. The role of the free-way space in the generation of muscle pain among denture-wearers. J Oral Rehabil 1984;11:483-98. 
  11. Dahl BL, Krogstad O. Long-term observations of an increased occlusal face height obtained by a combined orthodontic/prosthetic approach. J Oral Rehabil 1985;12:173-6. 
  12. Ormianer Z, Palty A. Altered vertical dimension of occlusion: a comparative retrospective pilot study of tooth- and implant-supported restorations. Int J Oral Maxillofac Implants 2009;24:497-501. 
  13. Gross MD, Ormianer Z. A preliminary study on the effect of occlusal vertical dimension increase on mandibular postural rest position. Int J Prosthodont 1994;7:216-26. 
  14. Moreno-Hay I, Okeson JP. Does altering the occlusal vertical dimension produce temporomandibular disorders? a literature review. J Oral Rehabil 2015;42:875-82. 
  15. Pound E. Let /S/ be your guide. J Prosthet Dent 1977;38:482-9. 
  16. Schuyler CH. An evaluation of incisal guidance and its influence in restorative dentistry. J Prosthet Dent 1959;9:374-8. 
  17. Proschel P, Morneburg T, Hugger A, Kordass B, Ottl P, Niedermeier W, Wichmann M. Articulator-related registration-a simple concept for minimizing eccentric occlusal errors in the articulator. Int J Prosthodont 2002;15:289-94. 
  18. Li Q, Bi M, Yang K, Liu W. The creation of a virtual dental patient with dynamic occlusion and its application in esthetic dentistry. J Prosthet Dent 2021;126:14-8. 
  19. Lepidi L, Galli M, Mastrangelo F, Venezia P, Joda T, Wang HL, Li J. Virtual articulators and virtual mounting procedures: where do we stand? J Prosthodont 2021;30:24-35.