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  1. Book ; Audio / Video ; Thesis: Präzision der Schablonen-gestützten Insertion kieferorthopädischer Implantate im anterioren Gaumen

    Möhlhenrich, Stephan Christian

    2022  

    Author's details vorgelegt von Dr. med. dent. Stephan Christian Möhlhenrich
    Language German
    Size 1 CD-ROM, Illustrationen
    Publishing place Witten/Herdecke
    Publishing country Germany
    Document type Book ; Audio / Video ; Thesis
    Thesis / German Habilitation thesis Dissertation, Universität Witten/Herdecke, 2022
    HBZ-ID HT021491912
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

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    2022 MO 142 order for loan Magazin

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  2. Book ; Thesis: Einfluss der Osteotomietechnik auf kieferorthopädische Operationen

    Möhlhenrich, Stephan Christian

    2018  

    Author's details vorgelegt von Dr. med. dent. Stephan Christian Möhlhenrich
    Language German
    Size 1 Band (verschiedene Seitenzählungen)
    Publishing place Aachen
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Habilitationsschrift, Rheinisch-Westfälische Technische Hochschule Aachen, 2018
    Note Die Habilitationsschrift umfasst einen Text und 7 Aufsätze, die zuvor in verschiedenen Zeitschriften/Quellen veröffentlicht wurden
    HBZ-ID HT019949118
    Database Catalogue ZB MED Medicine, Health

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    2019 E 288 order for loan Magazin

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  3. Book ; Thesis: Oberflächenbeschädigung dentaler enossaler Implantate in Abhängigkeit des zur Insertion verwendeten chirurgischen Protokolls: ablativ vs. non-ablativ

    Möhlhenrich, Stephan Christian

    2014  

    Author's details vorgelegt von Stephan Christian Möhlhenrich
    Language German
    Size VI, 106 S. : Ill., graph. Darst., 21 cm, 218 g
    Edition 1. Aufl.
    Publisher VVB Laufersweiler
    Publishing place Gießen
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Gießen, Univ., Diss., 2014
    HBZ-ID HT018698500
    ISBN 978-3-8359-6156-2 ; 3-8359-6156-X
    Database Catalogue ZB MED Medicine, Health

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    2015 A 2773 available for loan (reading room) Lesesaal EG

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  4. Article ; Online: The effect of zirconia and titanium surfaces on biofilm formation and on host-derived immunological parameters.

    Kniha, K / Heussen, N / Modabber, A / Hölzle, F / Möhlhenrich, S C

    International journal of oral and maxillofacial surgery

    2021  Volume 50, Issue 10, Page(s) 1361–1374

    Abstract: The aim of this study was to analyse the effect of zirconia and titanium surfaces on biofilm formation and host-derived parameters. Studies comparing zirconia and titanium surfaces were selected up to September 1, 2019. The outcome measures were surface ... ...

    Abstract The aim of this study was to analyse the effect of zirconia and titanium surfaces on biofilm formation and host-derived parameters. Studies comparing zirconia and titanium surfaces were selected up to September 1, 2019. The outcome measures were surface roughness, contact angle, bacterial count, bacterial adherence, biofilm thickness, bacterial distribution, and specifically investigated biofilm and specific host-derived immunological parameters. Random-effects meta-analyses of in vitro and in vivo studies were conducted. A total of 39 studies were included for data extraction. In the systematic review data, 10 studies stated that zirconia accumulated less initial oral biofilm parameters, 16 investigations showed negligible inter-material differences, and only one study showed that zirconia attracted the most biofilm. However, in the meta-analysis, the bacterial coverage was found to be significantly superior for zirconia surfaces (P< 0.00001); the other outcome measures did not show any statistically significant differences between zirconia and titanium for the remaining parameters and the studies presented a substantial degree of heterogeneity. Overall, on the basis of the meta-analysis, the current data situation does not allow a clear preference for the use of zirconia or titanium.
    MeSH term(s) Biofilms ; Dental Implants ; Humans ; Surface Properties ; Titanium ; Zirconium
    Chemical Substances Dental Implants ; Zirconium (C6V6S92N3C) ; Titanium (D1JT611TNE) ; zirconium oxide (S38N85C5G0)
    Language English
    Publishing date 2021-02-19
    Publishing country Denmark
    Document type Journal Article ; Meta-Analysis ; Review
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2021.01.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 931: Show issues Location:
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  5. Article ; Online: The primary stability of two dental implant systems in low-density bone.

    Heitzer, M / Kniha, K / Katz, M S / Winnand, P / Peters, F / Möhlhenrich, S C / Hölzle, F / Modabber, A

    International journal of oral and maxillofacial surgery

    2022  Volume 51, Issue 8, Page(s) 1093–1100

    Abstract: Primary stability in low-density bone is crucial for the long-term success of implants. Tapered implants have shown particularly favourable properties under such conditions. The aim of this study was to compare the primary stability of tapered titanium ... ...

    Abstract Primary stability in low-density bone is crucial for the long-term success of implants. Tapered implants have shown particularly favourable properties under such conditions. The aim of this study was to compare the primary stability of tapered titanium and novel cylindrical zirconia dental implant systems in low-density bone. Fifty implants (25 tapered, 25 cylindrical) were placed in the anterior maxillary bone of cadavers meeting the criteria of low-density bone. The maximum insertion (ITV) and removal (RTV) torque values were recorded, and the implant stability quotients (ISQ) determined. To establish the isolated influence of cancellous bone on primary stability, the implantation procedure was performed in standardized low-density polyurethane foam bone blocks (cancellous bone model) using the same procedure. The primary stability parameters of both implant types showed significant positive correlations with bone density (Hounsfield units) and cortical thickness. In the cadaver, the cylindrical zirconia implants showed a significantly higher mean ISQ when compared to the tapered titanium implants (50.58 vs 37.26; P < 0.001). Pearson analysis showed significant positive correlations between ITV and ISQ (P = 0.016) and between RTV and ISQ (P = 0.035) for the cylindrical zirconia implants; no such correlations were observed for the tapered titanium implants. Within the limitations of this study, the results indicate that cylindrical zirconia implants represent a comparable viable treatment option to tapered titanium implants in terms of primary implant stability in low-density human bone.
    MeSH term(s) Bone Density ; Dental Implantation, Endosseous/methods ; Dental Implants ; Dental Prosthesis Design ; Dental Prosthesis Retention ; Humans ; Titanium ; Torque
    Chemical Substances Dental Implants ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2022-03-23
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2022.02.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Evaluation of a novel osteosynthesis plate system for mandibular defects.

    Peters, F / Kniha, K / Möhlhenrich, S C / Bock, A / Hölzle, F / Modabber, A

    The British journal of oral & maxillofacial surgery

    2020  Volume 58, Issue 9, Page(s) e109–e114

    Abstract: Continuity defects of the jaw can be reconstructed with titanium plates or microvascular bone flaps; osteosynthesis plates are necessary for both. In this study we performed a retrospective review of patients treated with Medartis MODUS® Mandible Trauma/ ... ...

    Abstract Continuity defects of the jaw can be reconstructed with titanium plates or microvascular bone flaps; osteosynthesis plates are necessary for both. In this study we performed a retrospective review of patients treated with Medartis MODUS® Mandible Trauma/Reco 2.0-2.5, TriLock bridging plates, mandibulectomy and soft tissue free flap or reconstruction with a bony free flap and TriLock mandibular plates from the same system from January 2015 to August 2019. The variables recorded were sex, age, diagnosis, radiotherapy, date of implantation, date of explantation or death of patient, size of mandibular defect, Jewer classification of defect, number of screws used, segments of bony reconstruction, screws per segment, plate exposure, plate breakage, and pseudarthrosis. The bridging plate group consisted of 41 patients, while the mandibular plate group consisted of 24 patients. The percentage of plate exposure was 17.07% for the bridging plate group and 4.17% for the mandibular plate group. Plate breakage was 0 in both groups. Pseudarthrosis was 4.17% in the mandibular plate group. In the bridging plate group, an anterolateral thigh flap covered all exposures. Of 7 plate exposures, 4 were found in a C defect. The complication rate of the investigated plates was lower than the complication rates of other plate systems.
    MeSH term(s) Bone Plates ; Fracture Fixation, Internal ; Humans ; Mandible ; Mandibular Neoplasms/surgery ; Mandibular Reconstruction ; Retrospective Studies
    Language English
    Publishing date 2020-07-25
    Publishing country Scotland
    Document type Journal Article
    ZDB-ID 605685-4
    ISSN 1532-1940 ; 0266-4356
    ISSN (online) 1532-1940
    ISSN 0266-4356
    DOI 10.1016/j.bjoms.2020.07.018
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  7. Article ; Online: Evaluation of symmetry behavior of surgically assisted rapid maxillary expansion with simulation-driven targeted bone weakening.

    Chhatwani, S / Schudlich, K / Möhlhenrich, S C / Pugachev, A / Bicsak, A / Ludwig, B / Hassfeld, S / Danesh, G / Bonitz, L

    Clinical oral investigations

    2021  Volume 25, Issue 12, Page(s) 6717–6728

    Abstract: Objectives: Surgically assisted rapid maxillary expansion (SARME) is a treatment modality to overcome maxillary constrictions. During the procedure of transverse expansion, unwanted asymmetries can occur. This retrospective study investigates the ... ...

    Abstract Objectives: Surgically assisted rapid maxillary expansion (SARME) is a treatment modality to overcome maxillary constrictions. During the procedure of transverse expansion, unwanted asymmetries can occur. This retrospective study investigates the transverse expansion behavior of the maxilla utilizing a simulation-driven SARME with targeted bone weakening.
    Materials and methods: Cone beam computer tomographies of 21 patients before (T1) and 4 months after treatment (T2) with simulation-driven SARME combined with a transpalatal distractor (TPD) and targeted bone weakening were superimposed. The movements of the left, right, and frontal segments were evaluated at the modified WALA ridge, mid root level, and at the root tip of all upper teeth. Linear and angular measurements were performed to detect dentoalveolar changes.
    Results: Dentoalveolar changes were unavoidable, and buccal tipping of the premolars (6.1° ± 5.0°) was significant (p < 0.05). Transverse expansion in premolar region was higher (6.13 ± 4.63mm) than that in the molar region (4.20 ± 4.64mm). Expansion of left and right segments did not differ significantly (p > 0.05).
    Conclusion: Simulation-driven SARME with targeted bone weakening is effective to achieve symmetrical expansion in the transverse plane.
    Clinical relevance: Simulation-driven targeted bone weakening is a novel method for SARME to achieve symmetric expansion. Dental side effects cannot be prohibited.
    MeSH term(s) Bicuspid/surgery ; Cone-Beam Computed Tomography ; Humans ; Maxilla/diagnostic imaging ; Maxilla/surgery ; Palatal Expansion Technique ; Retrospective Studies
    Language English
    Publishing date 2021-05-05
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1364490-7
    ISSN 1436-3771 ; 1432-6981
    ISSN (online) 1436-3771
    ISSN 1432-6981
    DOI 10.1007/s00784-021-03958-w
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    Zs.A 4788: Show issues Location:
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  8. Article ; Online: Influence of bone density, screw size and surgical procedure on orthodontic mini-implant placement - part B: implant stability.

    Möhlhenrich, S C / Heussen, N / Modabber, A / Bock, A / Hölzle, F / Wilmes, B / Danesh, G / Szalma, J

    International journal of oral and maxillofacial surgery

    2020  Volume 50, Issue 4, Page(s) 565–572

    Abstract: This in vitro study aimed to investigate the influence of bone density, implant size, and surgical procedure on the primary stability (PS) of orthodontic mini-implants (OMIs). In total, 640 OMIs of various sizes (2.0 × 7, 2.3 × 7, 2.0 × 11 and 2.3 × 11 ... ...

    Abstract This in vitro study aimed to investigate the influence of bone density, implant size, and surgical procedure on the primary stability (PS) of orthodontic mini-implants (OMIs). In total, 640 OMIs of various sizes (2.0 × 7, 2.3 × 7, 2.0 × 11 and 2.3 × 11 mm) were inserted in the artificial bone of different densities (D1-D4). Placement was performed with an insertion angle of 90° or 60° to the bone surface and in 320 cases without predrilling, which resulted in 64 groups. PS was measured on the basis of implant stability quotient (ISQ) and insertion torque (IT). With regard to all possible influencing parameters, the mean PS differed between 39.20 and 60.00 (ISQ), and 10.00 and 39.00 Ncm (IT). The effect of OMI size and surgical procedure was dependent on bone quality. For example, implant size had less effect in high-density bone and was stronger with decreasing density. Overall, implant length had a greater influence than the diameter, and a high correlation was found among both PS measurement techniques. Therefore, a suitable choice of implant size and surgical protocol with regard to bone density can positively influence PS. In principle, ISQ and IT are suitable for measuring OMI stability.
    MeSH term(s) Bone Density ; Bone Screws ; Dental Implants ; Humans ; Orthodontic Anchorage Procedures ; Torque
    Chemical Substances Dental Implants
    Language English
    Publishing date 2020-07-24
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2020.07.003
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    Zs.A 931: Show issues Location:
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  9. Article ; Online: Changes in the temporomandibular joint position depending on the sagittal osteotomy technique and extent of mandibular movement.

    Möhlhenrich, S C / Winterhalder, P / Ooms, M / Heitzer, M / Kilic, K / Prescher, A / Hölzle, F / Danesh, G / Modabber, A

    International journal of oral and maxillofacial surgery

    2020  Volume 50, Issue 3, Page(s) 356–366

    Abstract: The bilateral sagittal split osteotomy (BSSO) and high oblique sagittal split osteotomy (HSSO) are common techniques for mandibular movement in orthognathic surgery. The aim of this study was to evaluate the influence of both techniques, as well as ... ...

    Abstract The bilateral sagittal split osteotomy (BSSO) and high oblique sagittal split osteotomy (HSSO) are common techniques for mandibular movement in orthognathic surgery. The aim of this study was to evaluate the influence of both techniques, as well as movement distances and directions, on the position of the temporomandibular joint (TMJ). A total of 80 mandibular movements were performed on 20 fresh human cadaver heads, four on each head. Pre- and postoperative cone beam computed tomography was used to plan the surgical procedure and analyse the TMJ. Reference measurements included the anterior, superior, and posterior joint spaces, intercondylar distances and angles in the axial and coronal planes, and the sagittal, coronal, and axial angulations of the proximal segment. Only minor differences were found between the BSSO and HSSO techniques, particularly in terms of the intercondylar angle in the axial plane (P <  0.03) and the condylar angle of the proximal segment in the sagittal plane (P <  0.011). Observed changes in the TMJ were mostly opposite when moving the mandible forwards and backwards and increased with increasing movement distance. BSSO and HSSO result in similar changes in TMJ position. The extent of the movement distance influences the position of the condyle more than the osteotomy technique.
    MeSH term(s) Humans ; Mandible/diagnostic imaging ; Mandible/surgery ; Mandibular Condyle/diagnostic imaging ; Mandibular Condyle/surgery ; Orthognathic Surgery ; Orthognathic Surgical Procedures ; Osteotomy, Sagittal Split Ramus ; Temporomandibular Joint/diagnostic imaging ; Temporomandibular Joint/surgery
    Language English
    Publishing date 2020-06-30
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2020.06.009
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  10. Article ; Online: Aesthetic aspects of adjacent maxillary single-crown implants-influence of zirconia and titanium as implant materials.

    Kniha, K / Bock, A / Peters, F / Heitzer, M / Modabber, A / Kniha, H / Hölzle, F / Möhlhenrich, S C

    International journal of oral and maxillofacial surgery

    2020  Volume 49, Issue 11, Page(s) 1489–1496

    Abstract: The purpose of this retrospective survey was to assess the esthetic aspects of adjacent zirconia and titanium implants in the anterior maxillary area. A total of 40 patients and 109 adjacent implants (17 patients with 47 titanium implants and 23 patients ...

    Abstract The purpose of this retrospective survey was to assess the esthetic aspects of adjacent zirconia and titanium implants in the anterior maxillary area. A total of 40 patients and 109 adjacent implants (17 patients with 47 titanium implants and 23 patients with 62 zirconia implants) was included. The primary aim of this survey was to assess the papillary fill (Jemt score). Additionally, further esthetic aspects were assessed. Papillae were fully present (Jemt score 3) around 39.1% of adjacent zirconia implants and 17.4% of adjacent titanium implants (p<0.01). The papilla deficit was significantly higher 1.64 mm (SD 1.35) around titanium compared to zirconia implants 0.92 mm (SD 0.94, p<0.01). The evaluation of the soft tissue recessions revealed no differences between implant materials, whereas titanium implants presented more visible implant shadows (p<0.01). Zirconia implants had more implants with papillae that filled the entire proximal space compared to titanium implants. Furthermore, titanium implants had a greater frequency of visible implant shadowing than the zirconia implants. Esthetic rules such as the interdental contact area and golden percentage rules did not differ significantly between the titanium and zirconia implants.
    MeSH term(s) Crowns ; Dental Implants ; Dental Prosthesis Design ; Esthetics, Dental ; Humans ; Retrospective Studies ; Titanium ; Zirconium
    Chemical Substances Dental Implants ; Zirconium (C6V6S92N3C) ; Titanium (D1JT611TNE) ; zirconium oxide (S38N85C5G0)
    Language English
    Publishing date 2020-04-30
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2020.04.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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